# HG changeset patch # User Matt Johnston # Date 1370021922 -28800 # Node ID 8705acff249457cd82ec97efd7ffb79fbf30b34c lots of stuff diff -r 000000000000 -r 8705acff2494 Makefile --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Makefile Sat Jun 01 01:38:42 2013 +0800 @@ -0,0 +1,114 @@ +# Name: Makefile +# Author: +# Copyright: +# License: + +# This is a prototype Makefile. Modify it according to your needs. +# You should at least check the settings for +# DEVICE ....... The AVR device you compile for +# CLOCK ........ Target AVR clock rate in Hertz +# OBJECTS ...... The object files created from your source files. This list is +# usually the same as the list of source files with suffix ".o". +# PROGRAMMER ... Options to avrdude which define the hardware you use for +# uploading to the AVR and the interface where this hardware +# is connected. We recommend that you leave it undefined and +# add settings like this to your ~/.avrduderc file: +# default_programmer = "stk500v2" +# default_serial = "avrdoper" +# FUSES ........ Parameters for avrdude to flash the fuses appropriately. + +DEVICE = atmega328 +PROGDEVICE = atmega328p +CLOCK = 2000000 +PROGRAMMER = #-c stk500v2 -P avrdoper +PROGRAMMER = -c stk500 -P ~/dev/stk500 -p $(PROGDEVICE) -B 2 +SOURCE_1WIRE = onewire.c simple_ds18b20.c crc8.c +SOURCE_CRYPTO = sha1.c hmac-sha1.c sha1-asm.S +SOURCE = main.c +SOURCE += $(SOURCE_1WIRE) $(SOURCE_CRYPTO) +LIBS = -lm + +# default but 2mhz +FUSES = -U hfuse:w:0xd9:m -U lfuse:w:0x62:m + +# ATMega8 fuse bits used above (fuse bits for other devices are different!): +# Example for 8 MHz internal oscillator +# Fuse high byte: +# 0xd9 = 1 1 0 1 1 0 0 1 <-- BOOTRST (boot reset vector at 0x0000) +# ^ ^ ^ ^ ^ ^ ^------ BOOTSZ0 +# | | | | | +-------- BOOTSZ1 +# | | | | +---------- EESAVE (set to 0 to preserve EEPROM over chip erase) +# | | | +-------------- WDTON +# | | +---------------- SPIEN (if set to 1, serial programming is disabled) +# | +------------------ DWEN +# +-------------------- RSTDISBL (if set to 0, RESET pin is disabled) +# Fuse low byte: +# 0x62 = 0 1 1 0 0 0 1 0 +# ^ ^ \ / \--+--/ +# | | | +------- CKSEL 3..0 (8M internal RC) +# | | +--------------- SUT 1..0 (slowly rising power) +# | +------------------ CKOUT +# +-------------------- CLKDIV8 +# +# For computing fuse byte values for other devices and options see +# the fuse bit calculator at http://www.engbedded.com/fusecalc/ + + +# Tune the lines below only if you know what you are doing: + +AVRDUDE = avrdude $(PROGRAMMER) +#COMPILE = avr-gcc -Wall -Os -DF_CPU=$(CLOCK) -mmcu=$(DEVICE) -g -std=c99 -mcall-prologues -fdata-sections -ffunction-sections -Wl,--gc-sections -Wl,--relax -fwhole-program -Wl,-u,vfprintf -lprintf_flt -lm +COMPILE = avr-gcc -Wall -Os -DF_CPU=$(CLOCK) -mmcu=$(DEVICE) -g -std=c99 -Wl,-u,vfprintf -lprintf_flt -lm + +# symbolic targets: +all: main.hex + +.c.o: + $(COMPILE) -c $< -o $@ + +.S.o: + $(COMPILE) -x assembler-with-cpp -c $< -o $@ +# "-x assembler-with-cpp" should not be necessary since this is the default +# file type for the .S (with capital S) extension. However, upper case +# characters are not always preserved on Windows. To ensure WinAVR +# compatibility define the file type manually. + +.c.s: + $(COMPILE) -S $< -o $@ + +flash: all + $(AVRDUDE) -U flash:w:main.hex:i + +checkprog: + $(AVRDUDE) -v + +fuse: + $(AVRDUDE) $(FUSES) + +# Xcode uses the Makefile targets "", "clean" and "install" +install: flash + +# if you use a bootloader, change the command below appropriately: +load: all + bootloadHID main.hex + +clean: + rm -f main.hex main.elf $(OBJECTS) + +# file targets: +main.elf: $(SOURCE) + $(COMPILE) -o main.elf $(SOURCE) $(LIBS) + +main.hex: main.elf + rm -f main.hex + avr-objcopy -j .text -j .data -O ihex main.elf main.hex + avr-size --format=avr --mcu=$(DEVICE) main.elf +# If you have an EEPROM section, you must also create a hex file for the +# EEPROM and add it to the "flash" target. + +# Targets for code debugging and analysis: +disasm: main.elf + avr-objdump -d main.elf + +cpp: + $(COMPILE) -E main.c diff -r 000000000000 -r 8705acff2494 cli.h diff -r 000000000000 -r 8705acff2494 config.h diff -r 000000000000 -r 8705acff2494 crc8.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/crc8.c Sat Jun 01 01:38:42 2013 +0800 @@ -0,0 +1,63 @@ +/* please read copyright-notice at EOF */ + +#include + +#define CRC8INIT 0x00 +#define CRC8POLY 0x18 //0X18 = X^8+X^5+X^4+X^0 + +uint8_t crc8( uint8_t *data, uint16_t number_of_bytes_in_data ) +{ + uint8_t crc; + uint16_t loop_count; + uint8_t bit_counter; + uint8_t b; + uint8_t feedback_bit; + + crc = CRC8INIT; + + for (loop_count = 0; loop_count != number_of_bytes_in_data; loop_count++) + { + b = data[loop_count]; + + bit_counter = 8; + do { + feedback_bit = (crc ^ b) & 0x01; + + if ( feedback_bit == 0x01 ) { + crc = crc ^ CRC8POLY; + } + crc = (crc >> 1) & 0x7F; + if ( feedback_bit == 0x01 ) { + crc = crc | 0x80; + } + + b = b >> 1; + bit_counter--; + + } while (bit_counter > 0); + } + + return crc; +} + +/* +This code is from Colin O'Flynn - Copyright (c) 2002 +only minor changes by M.Thomas 9/2004 + +Permission is hereby granted, free of charge, to any person obtaining a copy of +this software and associated documentation files (the "Software"), to deal in +the Software without restriction, including without limitation the rights to +use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of +the Software, and to permit persons to whom the Software is furnished to do so, +subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS +FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR +COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER +IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +*/ diff -r 000000000000 -r 8705acff2494 crc8.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/crc8.h Sat Jun 01 01:38:42 2013 +0800 @@ -0,0 +1,40 @@ +#ifndef CRC8_H_ +#define CRC8_H_ + +#ifdef __cplusplus +extern "C" { +#endif + +#include + +uint8_t crc8( uint8_t* data, uint16_t number_of_bytes_in_data ); + +#ifdef __cplusplus +} +#endif + +#endif + +/* +This is based on code from : + +Copyright (c) 2002 Colin O'Flynn + +Permission is hereby granted, free of charge, to any person obtaining a copy of +this software and associated documentation files (the "Software"), to deal in +the Software without restriction, including without limitation the rights to +use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of +the Software, and to permit persons to whom the Software is furnished to do so, +subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS +FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR +COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER +IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +*/ + diff -r 000000000000 -r 8705acff2494 debug.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/debug.h Sat Jun 01 01:38:42 2013 +0800 @@ -0,0 +1,1 @@ +#define DEBUG_S(x) diff -r 000000000000 -r 8705acff2494 ds18x20.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ds18x20.h Sat Jun 01 01:38:42 2013 +0800 @@ -0,0 +1,140 @@ +#ifndef DS18X20_H_ +#define DS18X20_H_ + +#ifdef __cplusplus +extern "C" { +#endif + +#include +#include + +// DS18x20 EERPROM support disabled(0) or enabled(1) : +#define DS18X20_EEPROMSUPPORT 1 +// decicelsius functions disabled(0) or enabled(1): +#define DS18X20_DECICELSIUS 1 +// max. resolution functions disabled(0) or enabled(1): +#define DS18X20_MAX_RESOLUTION 1 +// extended output via UART disabled(0) or enabled(1) : +#define DS18X20_VERBOSE 1 + + +/* return values */ +#define DS18X20_OK 0x00 +#define DS18X20_ERROR 0x01 +#define DS18X20_START_FAIL 0x02 +#define DS18X20_ERROR_CRC 0x03 + +#define DS18X20_INVALID_DECICELSIUS 2000 + +#define DS18X20_POWER_PARASITE 0x00 +#define DS18X20_POWER_EXTERN 0x01 + +#define DS18X20_CONVERSION_DONE 0x00 +#define DS18X20_CONVERTING 0x01 + +/* DS18X20 specific values (see datasheet) */ +#define DS18S20_FAMILY_CODE 0x10 +#define DS18B20_FAMILY_CODE 0x28 +#define DS1822_FAMILY_CODE 0x22 + +#define DS18X20_CONVERT_T 0x44 +#define DS18X20_READ 0xBE +#define DS18X20_WRITE 0x4E +#define DS18X20_EE_WRITE 0x48 +#define DS18X20_EE_RECALL 0xB8 +#define DS18X20_READ_POWER_SUPPLY 0xB4 + +#define DS18B20_CONF_REG 4 +#define DS18B20_9_BIT 0 +#define DS18B20_10_BIT (1<<5) +#define DS18B20_11_BIT (1<<6) +#define DS18B20_12_BIT ((1<<6)|(1<<5)) +#define DS18B20_RES_MASK ((1<<6)|(1<<5)) + +// undefined bits in LSB if 18B20 != 12bit +#define DS18B20_9_BIT_UNDF ((1<<0)|(1<<1)|(1<<2)) +#define DS18B20_10_BIT_UNDF ((1<<0)|(1<<1)) +#define DS18B20_11_BIT_UNDF ((1<<0)) +#define DS18B20_12_BIT_UNDF 0 + +// conversion times in milliseconds +#define DS18B20_TCONV_12BIT 750 +#define DS18B20_TCONV_11BIT DS18B20_TCONV_12_BIT/2 +#define DS18B20_TCONV_10BIT DS18B20_TCONV_12_BIT/4 +#define DS18B20_TCONV_9BIT DS18B20_TCONV_12_BIT/8 +#define DS18S20_TCONV DS18B20_TCONV_12_BIT + +// constant to convert the fraction bits to cel*(10^-4) +#define DS18X20_FRACCONV 625 + +// scratchpad size in bytes +#define DS18X20_SP_SIZE 9 + +// DS18X20 EEPROM-Support +#define DS18X20_WRITE_SCRATCHPAD 0x4E +#define DS18X20_COPY_SCRATCHPAD 0x48 +#define DS18X20_RECALL_E2 0xB8 +#define DS18X20_COPYSP_DELAY 10 /* ms */ +#define DS18X20_TH_REG 2 +#define DS18X20_TL_REG 3 + +#define DS18X20_DECIMAL_CHAR '.' + + +extern uint8_t DS18X20_find_sensor(uint8_t *diff, + uint8_t id[]); +extern uint8_t DS18X20_get_power_status(uint8_t id[]); +extern uint8_t DS18X20_start_meas( uint8_t with_external, + uint8_t id[]); +// returns 1 if conversion is in progress, 0 if finished +// not available when parasite powered +extern uint8_t DS18X20_conversion_in_progress(void); + + +#if DS18X20_DECICELSIUS +extern uint8_t DS18X20_read_decicelsius( uint8_t id[], + int16_t *decicelsius ); +extern uint8_t DS18X20_read_decicelsius_single( uint8_t familycode, + int16_t *decicelsius ); +extern uint8_t DS18X20_format_from_decicelsius( int16_t decicelsius, + char s[], uint8_t n); +#endif /* DS18X20_DECICELSIUS */ + + +#if DS18X20_MAX_RESOLUTION +// temperature unit for max. resolution is °C * 10e-4 +// examples: -250625 -> -25.0625°C, 1250000 -> 125.0000 °C +extern uint8_t DS18X20_read_maxres( uint8_t id[], + int32_t *temperaturevalue ); +extern uint8_t DS18X20_read_maxres_single( uint8_t familycode, + int32_t *temperaturevalue ); +extern uint8_t DS18X20_format_from_maxres( int32_t temperaturevalue, + char s[], uint8_t n); +#endif /* DS18X20_MAX_RESOLUTION */ + + +#if DS18X20_EEPROMSUPPORT +// write th, tl and config-register to scratchpad (config ignored on DS18S20) +uint8_t DS18X20_write_scratchpad( uint8_t id[], + uint8_t th, uint8_t tl, uint8_t conf); +// read scratchpad into array SP +uint8_t DS18X20_read_scratchpad( uint8_t id[], uint8_t sp[], uint8_t n); +// copy values int scratchpad into DS18x20 eeprom +uint8_t DS18X20_scratchpad_to_eeprom( uint8_t with_power_extern, + uint8_t id[] ); +// copy values from DS18x20 eeprom into scratchpad +uint8_t DS18X20_eeprom_to_scratchpad( uint8_t id[] ); +#endif /* DS18X20_EEPROMSUPPORT */ + + +#if DS18X20_VERBOSE +extern void DS18X20_show_id_uart( uint8_t *id, size_t n ); +extern uint8_t DS18X20_read_meas_all_verbose( void ); +#endif /* DS18X20_VERBOSE */ + + +#ifdef __cplusplus +} +#endif + +#endif diff -r 000000000000 -r 8705acff2494 hmac-sha1.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/hmac-sha1.c Sat Jun 01 01:38:42 2013 +0800 @@ -0,0 +1,131 @@ +/* hmac-sha1.c */ +/* + This file is part of the AVR-Crypto-Lib. + Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ +/** + * + * implementation of HMAC as described in RFC2104 + * Author: Daniel Otte + * email: daniel.otte@rub.de + * License: GPLv3 or later + **/ + +/* + * hmac = hash ( k^opad , hash( k^ipad , msg)) + */ + +#include +#include +#include "config.h" +#include "sha1.h" +#include "hmac-sha1.h" + +#define IPAD 0x36 +#define OPAD 0x5C + + +#ifndef HMAC_SHORTONLY + +void hmac_sha1_init(hmac_sha1_ctx_t *s, const void* key, uint16_t keylength_b){ + uint8_t buffer[SHA1_BLOCK_BYTES]; + uint8_t i; + + memset(buffer, 0, SHA1_BLOCK_BYTES); + if (keylength_b > SHA1_BLOCK_BITS){ + sha1((void*)buffer, key, keylength_b); + } else { + memcpy(buffer, key, (keylength_b+7)/8); + } + + for (i=0; ia)); + sha1_nextBlock(&(s->a), buffer); + + for (i=0; ib)); + sha1_nextBlock(&(s->b), buffer); + + +#if defined SECURE_WIPE_BUFFER + memset(buffer, 0, SHA1_BLOCK_BYTES); +#endif +} + +void hmac_sha1_nextBlock(hmac_sha1_ctx_t *s, const void* block){ + sha1_nextBlock(&(s->a), block); +} +void hmac_sha1_lastBlock(hmac_sha1_ctx_t *s, const void* block, uint16_t length_b){ + while(length_b>=SHA1_BLOCK_BITS){ + sha1_nextBlock(&s->a, block); + block = (uint8_t*)block + SHA1_BLOCK_BYTES; + length_b -= SHA1_BLOCK_BITS; + } + sha1_lastBlock(&s->a, block, length_b); +} + +void hmac_sha1_final(void* dest, hmac_sha1_ctx_t *s){ + sha1_ctx2hash(dest, &s->a); + sha1_lastBlock(&s->b, dest, SHA1_HASH_BITS); + sha1_ctx2hash(dest, &(s->b)); +} + +#endif + +/* + * keylength in bits! + * message length in bits! + */ +void hmac_sha1(void* dest, const void* key, uint16_t keylength_b, const void* msg, uint32_t msglength_b){ /* a one-shot*/ + sha1_ctx_t s; + uint8_t i; + uint8_t buffer[SHA1_BLOCK_BYTES]; + + memset(buffer, 0, SHA1_BLOCK_BYTES); + + /* if key is larger than a block we have to hash it*/ + if (keylength_b > SHA1_BLOCK_BITS){ + sha1((void*)buffer, key, keylength_b); + } else { + memcpy(buffer, key, (keylength_b+7)/8); + } + + for (i=0; i= SHA1_BLOCK_BITS){ + sha1_nextBlock(&s, msg); + msg = (uint8_t*)msg + SHA1_BLOCK_BYTES; + msglength_b -= SHA1_BLOCK_BITS; + } + sha1_lastBlock(&s, msg, msglength_b); + /* since buffer still contains key xor ipad we can do ... */ + for (i=0; i. +*/ +#ifndef HMACSHA1_H_ +#define HMACSHA1_H_ + +#include "sha1.h" + +#define HMAC_SHA1_BITS SHA1_HASH_BITS +#define HMAC_SHA1_BYTES SHA1_HASH_BYTES +#define HMAC_SHA1_BLOCK_BITS SHA1_BLOCK_BITS +#define HMAC_SHA1_BLOCK_BYTES SHA1_BLOCK_BYTES + +typedef struct{ + sha1_ctx_t a, b; +} hmac_sha1_ctx_t; + + +void hmac_sha1_init(hmac_sha1_ctx_t *s, const void* key, uint16_t keylength_b); +void hmac_sha1_nextBlock(hmac_sha1_ctx_t *s, const void* block); +void hmac_sha1_lastBlock(hmac_sha1_ctx_t *s, const void* block, uint16_t length_b); +void hmac_sha1_final(void* dest, hmac_sha1_ctx_t *s); + +void hmac_sha1(void* dest, const void* key, uint16_t keylength_b, const void* msg, uint32_t msglength_b); + +#endif /*HMACSHA1_H_*/ diff -r 000000000000 -r 8705acff2494 main.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.c Sat Jun 01 01:38:42 2013 +0800 @@ -0,0 +1,1200 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "simple_ds18b20.h" +#include "onewire.h" + +// configuration params +// - measurement interval +// - transmit interval +// - bluetooth params +// - number of sensors (and range?) + +#define MIN(X,Y) ((X) < (Y) ? (X) : (Y)) +#define MAX(X,Y) ((X) > (Y) ? (X) : (Y)) + +// TICK should be 8 or less (8 untested). all timers need +// to be a multiple. + +#define TICK 6 +// we have 1024 prescaler, 32768 crystal. +#define SLEEP_COMPARE (32*TICK-1) + +#define VALUE_NOSENSOR 0x07D0 // 125 degrees +#define VALUE_BROKEN 0x07D1 // 125.0625 + +#define OVERSHOOT_MAX_DIV 1800.0 // 30 mins +#define WORT_INVALID_TIME 900 // 15 mins +// fridge min/max are only used if the wort sensor is invalid +#define FRIDGE_AIR_MIN_RANGE 40 // 4Âº +#define FRIDGE_AIR_MAX_RANGE 40 // 4Âº + +#define BAUD 19200 +#define UBRR ((F_CPU)/8/(BAUD)-1) + +#define PORT_LED PORTC +#define DDR_LED DDRC +#define PIN_LED PC4 + +#define PORT_SHDN PORTD +#define DDR_SHDN DDRD +#define PIN_SHDN PD7 + +#define PORT_FRIDGE PORTD +#define DDR_FRIDGE DDRD +#define PIN_FRIDGE PD6 + +// total amount of 16bit values available for measurements. +// adjust emperically, be sure to allow enough stack space too +#define TOTAL_MEASUREMENTS 800 + +// each sensor slot uses 8 bytes +#define MAX_SENSORS 6 + +// fixed at 8, have a shorter name +#define ID_LEN OW_ROMCODE_SIZE + +// #define HAVE_UART_ECHO + +// stores a value of clock_epoch combined with the remainder of TCNT2, +// for 1/32 second accuracy +struct epoch_ticks +{ + uint32_t ticks; + // remainder + uint8_t rem; +}; + +// eeprom-settable parameters. all timeouts should +// be a multiple of TICK (6 seconds probably) +static uint16_t measure_wake = 61; // not a divisor of comms_wake +static uint16_t comms_wake = 600; +static uint8_t wake_secs = 30; +// decidegrees +static int16_t fridge_setpoint = 180; // 18.0ÂºC +static uint16_t fridge_difference = 3; // 0.3ÂºC +static uint16_t fridge_delay = 600; // seconds + +static uint16_t overshoot_delay = 720; // 12 mins +static uint8_t overshoot_factor = 10; // 1.0ÂºC + +// ---- Atomic guards required accessing these variables +// clock_epoch in seconds +static uint32_t clock_epoch; +static uint16_t comms_count; +static uint16_t measure_count; +// ---- End atomic guards required + +static uint16_t n_measurements; + +// calculated at startup as TOTAL_MEASUREMENTS/n_sensors +static uint16_t max_measurements; + +static uint16_t measurements[TOTAL_MEASUREMENTS]; + +static struct epoch_ticks first_measurement_clock; +// last_measurement_clock is redundant but checks that we're not missing +// samples +static struct epoch_ticks last_measurement_clock; +static struct epoch_ticks last_comms_clock; + +// boolean flags +static uint8_t need_measurement; +static uint8_t need_comms; +static uint8_t uart_enabled; +static uint8_t stay_awake; +static uint8_t button_pressed; + +// counts down from WAKE_SECS to 0, goes to deep sleep when hits 0 +static uint8_t comms_timeout; + +static uint8_t readpos; +static char readbuf[30]; +static uint8_t have_cmd; + +static uint8_t n_sensors; +static uint8_t sensor_id[MAX_SENSORS][ID_LEN]; + +static int16_t last_fridge = DS18X20_INVALID_DECICELSIUS; +static int16_t last_wort = DS18X20_INVALID_DECICELSIUS; +static struct epoch_ticks fridge_off_clock = {0}; +static struct epoch_ticks fridge_on_clock = {0}; +static struct epoch_ticks wort_valid_clock = {0}; + +int uart_putchar(char c, FILE *stream); +static void long_delay(int ms); +static void blink(); +static uint16_t adc_vcc(); + +static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL, + _FDEV_SETUP_WRITE); + +static uint16_t crc_out; +static FILE _crc_stdout = FDEV_SETUP_STREAM(uart_putchar, NULL, + _FDEV_SETUP_WRITE); +// convenience +static FILE *crc_stdout = &_crc_stdout; + + +// thanks to http://projectgus.com/2010/07/eeprom-access-with-arduino/ +#define eeprom_read_to(dst_p, eeprom_field, dst_size) eeprom_read_block((dst_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (dst_size)) +#define eeprom_read(dst, eeprom_field) eeprom_read_to((&dst), eeprom_field, sizeof(dst)) +#define eeprom_write_from(src_p, eeprom_field, src_size) eeprom_write_block((src_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (src_size)) +#define eeprom_write(src, eeprom_field) { eeprom_write_from(&src, eeprom_field, sizeof(src)); } + +#define EXPECT_MAGIC 0x67c9 + +struct __attribute__ ((__packed__)) __eeprom_data { + uint16_t measure_wake; + uint16_t comms_wake; + uint8_t wake_secs; + + int16_t fridge_setpoint; // decidegrees + uint16_t fridge_difference; // decidegrees + uint16_t fridge_delay; + + uint16_t overshoot_delay; + uint8_t overshoot_factor; // decidegrees + +#if 0 + static uint8_t wort_id[ID_LEN]; + static uint8_t fridge_id[ID_LEN]; +#endif + + uint16_t magic; +}; + +static const uint8_t fridge_id[ID_LEN] = + {0x28,0xCE,0xB2,0x1A,0x03,0x00,0x00,0x99}; +static const uint8_t wort_id[ID_LEN] = + {0x28,0x49,0xBC,0x1A,0x03,0x00,0x00,0x54}; + +static void deep_sleep(); + +// 0 or 1 +static uint8_t +is_fridge_on() +{ + if (PORT_FRIDGE & _BV(PIN_FRIDGE)) + { + return 1; + } + else + { + return 0; + } +} + +// Very first setup +static void +setup_chip() +{ + cli(); + + // stop watchdog timer (might have been used to cause a reset) + wdt_reset(); + MCUSR &= ~_BV(WDRF); + WDTCSR |= _BV(WDCE) | _BV(WDE); + WDTCSR = 0; + + // Set clock to 2mhz + CLKPR = _BV(CLKPCE); + // divide by 4 + CLKPR = _BV(CLKPS1); + + // enable pullups + PORTB = 0xff; // XXX change when using SPI + PORTD = 0xff; + PORTC = 0xff; + + // 3.3v power for bluetooth and SD + DDR_LED |= _BV(PIN_LED); + DDR_SHDN |= _BV(PIN_SHDN); + + PORT_FRIDGE &= ~_BV(PIN_FRIDGE); + DDR_FRIDGE |= _BV(PIN_FRIDGE); + + // set pullup + PORTD |= _BV(PD2); + // INT0 setup + EICRA = (1<ticks = clock_epoch; + t->rem = TCNT2; + } +} + +static void +set_measurement(uint8_t sensor, uint16_t measurement, uint16_t reading) +{ + measurements[sensor*max_measurements + measurement] = reading; +} + +static uint16_t +get_measurement(uint8_t sensor, uint16_t measurement) +{ + return measurements[sensor*max_measurements + measurement]; +} + +static void +setup_tick_counter() +{ + // set up counter2. + // COM21 COM20 Set OC2 on Compare Match (p116) + // WGM21 Clear counter on compare + //TCCR2A = _BV(COM2A1) | _BV(COM2A0) | _BV(WGM21); + // toggle on match + TCCR2A = _BV(COM2A0); + // CS22 CS21 CS20 clk/1024 + TCCR2B = _BV(CS22) | _BV(CS21) | _BV(CS20); + // set async mode + ASSR |= _BV(AS2); + TCNT2 = 0; + OCR2A = SLEEP_COMPARE; + // interrupt + TIMSK2 = _BV(OCIE2A); +} + +static void +uart_on() +{ + // Power reduction register + PRR &= ~_BV(PRUSART0); + + // All of this needs to be done each time after turning off the PRR + // baud rate + UBRR0H = (unsigned char)(UBRR >> 8); + UBRR0L = (unsigned char)UBRR; + // set 2x clock, improves accuracy of UBRR + UCSR0A |= _BV(U2X0); + UCSR0B = _BV(RXCIE0) | _BV(RXEN0) | _BV(TXEN0); + //8N1 + UCSR0C = _BV(UCSZ01) | _BV(UCSZ00); + uart_enabled = 1; +} + +static void +uart_off() +{ + // Turn off interrupts and disable tx/rx + UCSR0B = 0; + uart_enabled = 0; + + // Power reduction register + PRR |= _BV(PRUSART0); +} + +int +uart_putchar(char c, FILE *stream) +{ + if (!uart_enabled) + { + return EOF; + } + // XXX could perhaps sleep in the loop for power. + if (c == '\n') + { + loop_until_bit_is_set(UCSR0A, UDRE0); + UDR0 = '\r'; + } + loop_until_bit_is_set(UCSR0A, UDRE0); + UDR0 = c; + if (stream == crc_stdout) + { + crc_out = _crc_ccitt_update(crc_out, c); + } + if (c == '\r') + { + loop_until_bit_is_set(UCSR0A, UDRE0); + UDR0 = '\n'; + if (stream == crc_stdout) + { + crc_out = _crc_ccitt_update(crc_out, '\n'); + } + } + return (unsigned char)c; +} + +static void +cmd_fetch() +{ + crc_out = 0; + + fprintf_P(crc_stdout, PSTR("START\n")); + { + struct epoch_ticks now; + get_epoch_ticks(&now); + fprintf_P(crc_stdout, PSTR("now=%lu\n"), now.ticks); + fprintf_P(crc_stdout, PSTR("now_rem=%hhu\n"), now.rem); + } + fprintf_P(crc_stdout, PSTR("time_step=%hu\n"), measure_wake); + fprintf_P(crc_stdout, PSTR("first_time=%lu\n"), first_measurement_clock.ticks); + fprintf_P(crc_stdout, PSTR("first_time_rem=%hhu\n"), first_measurement_clock.rem); + fprintf_P(crc_stdout, PSTR("last_time=%lu\n"), last_measurement_clock.ticks); + fprintf_P(crc_stdout, PSTR("last_time_rem=%hhu\n"), last_measurement_clock.rem); + fprintf_P(crc_stdout, PSTR("comms_time=%lu\n"), last_comms_clock.ticks); + fprintf_P(crc_stdout, PSTR("comms_time_rem=%hhu\n"), last_comms_clock.rem); + fprintf_P(crc_stdout, PSTR("voltage=%hu\n"), adc_vcc()); + fprintf_P(crc_stdout, PSTR("measure=%hu\n"), measure_wake); + fprintf_P(crc_stdout, PSTR("comms=%hu\n"), comms_wake); + fprintf_P(crc_stdout, PSTR("wake=%hhu\n"), wake_secs); + fprintf_P(crc_stdout, PSTR("fridge=%.1f\n"), fridge_setpoint/10.0); + fprintf_P(crc_stdout, PSTR("fridge_diff=%.1f\n"), fridge_difference/10.0); + fprintf_P(crc_stdout, PSTR("fridge_delay=%hu\n"), fridge_delay); + fprintf_P(crc_stdout, PSTR("overshoot_factor=%.1f\n"), overshoot_factor/10.0); + fprintf_P(crc_stdout, PSTR("overshoot_delay=%hu\n"), overshoot_delay); + fprintf_P(crc_stdout, PSTR("fridge_status=%hhu\n"), is_fridge_on()); + fprintf_P(crc_stdout, PSTR("fridge_last_on=%lu\n"), fridge_on_clock.ticks); + fprintf_P(crc_stdout, PSTR("fridge_last_off=%lu\n"), fridge_off_clock.ticks); + fprintf_P(crc_stdout, PSTR("last_fridge=%hu\n"), last_fridge); + fprintf_P(crc_stdout, PSTR("last_wort=%hu\n"), last_wort); + fprintf_P(crc_stdout, PSTR("tick_secs=%d\n"), TICK); + fprintf_P(crc_stdout, PSTR("tick_wake=%d\n"), SLEEP_COMPARE); + fprintf_P(crc_stdout, PSTR("maxsens=%hhu\n"), MAX_SENSORS); + fprintf_P(crc_stdout, PSTR("totalmeas=%hu\n"), TOTAL_MEASUREMENTS); + fprintf_P(crc_stdout, PSTR("sensors=%hhu\n"), n_sensors); + for (uint8_t s = 0; s < n_sensors; s++) + { + fprintf_P(crc_stdout, PSTR("sensor_id%hhu="), s); + printhex(sensor_id[s], ID_LEN, crc_stdout); + fputc('\n', crc_stdout); + } + fprintf_P(crc_stdout, PSTR("measurements=%hu\n"), n_measurements); + for (uint16_t n = 0; n < n_measurements; n++) + { + fprintf_P(crc_stdout, PSTR("meas%hu="), n); + for (uint8_t s = 0; s < n_sensors; s++) + { + fprintf_P(crc_stdout, PSTR(" %04hx"), get_measurement(s, n)); + } + fputc('\n', crc_stdout); + } + fprintf_P(crc_stdout, PSTR("END\n")); + fprintf_P(stdout, PSTR("CRC=%hu\n"), crc_out); +} + +static void +cmd_clear() +{ + n_measurements = 0; + printf_P(PSTR("cleared\n")); +} + +static void +cmd_btoff() +{ + uint8_t rem; + uint16_t count_copy; + ATOMIC_BLOCK(ATOMIC_RESTORESTATE) + { + count_copy = comms_count; + rem = TCNT2; + } + printf_P(PSTR("next_wake=%hu,"), comms_wake-count_copy); + printf_P(PSTR("rem=%hhu,"), rem); + printf_P(PSTR("tick_secs=%hhu,"), TICK); + printf_P(PSTR("tick_wake=%hhu\n"), SLEEP_COMPARE); + _delay_ms(100); + comms_timeout = 0; + stay_awake = 0; +} + +static void +cmd_reset() +{ + printf_P(PSTR("reset\n")); + _delay_ms(100); + cli(); // disable interrupts + wdt_enable(WDTO_15MS); // enable watchdog + while(1); // wait for watchdog to reset processor +} + +static void +cmd_measure() +{ + printf_P(PSTR("measuring\n")); + need_measurement = 1; +} + +static void +cmd_sensors() +{ + uint8_t ret = simple_ds18b20_start_meas(NULL); + printf_P(PSTR("All sensors, ret %hhu, waiting...\n"), ret); + long_delay(DS18B20_TCONV_12BIT); + simple_ds18b20_read_all(); +} + +static void +init_sensors() +{ + uint8_t id[OW_ROMCODE_SIZE]; + printf_P(PSTR("init sensors\n")); + ow_reset(); + for( uint8_t diff = OW_SEARCH_FIRST; diff != OW_LAST_DEVICE; ) + { + diff = ow_rom_search( diff, &id[0] ); + if( diff == OW_PRESENCE_ERR ) { + printf_P( PSTR("No Sensor found\r") ); + return; + } + + if( diff == OW_DATA_ERR ) { + printf_P( PSTR("Bus Error\r") ); + return; + } + + if (n_sensors < MAX_SENSORS) + { + memcpy(sensor_id[n_sensors], id, ID_LEN); + printf_P(PSTR("Added sensor %hhu : "), n_sensors); + printhex(id, ID_LEN, stdout); + putchar('\n'); + n_sensors++; + } + else + { + printf_P(PSTR("Too many sensors\n")); + } + } + + max_measurements = TOTAL_MEASUREMENTS / n_sensors; +} + +static void +load_params() +{ + uint16_t magic; + eeprom_read(magic, magic); + if (magic == EXPECT_MAGIC) + { + eeprom_read(measure_wake, measure_wake); + eeprom_read(comms_wake, comms_wake); + eeprom_read(wake_secs, wake_secs); + eeprom_read(fridge_setpoint, fridge_setpoint); + eeprom_read(fridge_difference, fridge_difference); + eeprom_read(fridge_delay, fridge_delay); + eeprom_read(overshoot_delay, overshoot_delay); + eeprom_read(overshoot_factor, overshoot_factor); + } +} + +static void +cmd_get_params() +{ + printf_P(PSTR("measure %hu\n"), measure_wake); + printf_P(PSTR("comms %hu\n"), comms_wake); + printf_P(PSTR("wake %hhu\n"), wake_secs); + printf_P(PSTR("tick %d\n"), TICK); + printf_P(PSTR("fridge %.1fÂº\n"), fridge_setpoint / 10.0f); + printf_P(PSTR("fridge difference %.1fÂº\n"), fridge_difference / 10.0f); + printf_P(PSTR("fridge_delay %hu\n"), fridge_delay); + printf_P(PSTR("overshoot factor %.1fÂº\n"), overshoot_factor / 10.0f); + printf_P(PSTR("overshoot delay %hu\n"), overshoot_delay); + printf_P(PSTR("sensors %hhu (%hhu)\n"), + n_sensors, MAX_SENSORS); + printf_P(PSTR("meas %hu (%hu)\n"), + max_measurements, TOTAL_MEASUREMENTS); +} + +static void +cmd_set_params(const char *params) +{ + uint16_t new_measure_wake; + uint16_t new_comms_wake; + uint8_t new_wake_secs; + int ret = sscanf_P(params, PSTR("%hu %hu %hhu"), + &new_measure_wake, &new_comms_wake, &new_wake_secs); + + if (ret != 3) + { + printf_P(PSTR("Bad values\n")); + } + else + { + ATOMIC_BLOCK(ATOMIC_RESTORESTATE) + { + eeprom_write(new_measure_wake, measure_wake); + eeprom_write(new_comms_wake, comms_wake); + eeprom_write(new_wake_secs, wake_secs); + uint16_t magic = EXPECT_MAGIC; + eeprom_write(magic, magic); + } + printf_P(PSTR("set_params for next boot\n")); + printf_P(PSTR("measure %hu comms %hu wake %hhu\n"), + new_measure_wake, new_comms_wake, new_wake_secs); + } +} + +// returns true if eeprom was written +static bool +set_initial_eeprom() +{ + uint16_t magic; + eeprom_read(magic, magic); + if (magic == EXPECT_MAGIC) + { + return false; + } + + ATOMIC_BLOCK(ATOMIC_RESTORESTATE) + { + eeprom_write(measure_wake, measure_wake); + eeprom_write(comms_wake, comms_wake); + eeprom_write(wake_secs, wake_secs); + eeprom_write(fridge_setpoint, fridge_setpoint); + eeprom_write(fridge_difference, fridge_difference); + eeprom_write(fridge_delay, fridge_delay); + eeprom_write(overshoot_delay, overshoot_delay); + eeprom_write(overshoot_factor, overshoot_factor); + magic = EXPECT_MAGIC; + eeprom_write(magic, magic); + } + + return true; +} + +static void +cmd_set_fridge_setpoint(char *params) +{ + float new_f = atof(params); + if (new_f < 2 || new_f > 30) + { + printf_P(PSTR("Bad fridge value %f\n"), new_f); + return; + } + + int16_t old_setpoint = fridge_setpoint; + + fridge_setpoint = new_f * 10; + bool written = set_initial_eeprom(); + if (!written) + { + if (old_setpoint != fridge_setpoint) + { + ATOMIC_BLOCK(ATOMIC_RESTORESTATE) + { + eeprom_write(fridge_setpoint, fridge_setpoint); + } + } + } + printf_P(PSTR("old fridge %.1fÂº new fridge %.1fÂº\n"), + old_setpoint / 10.0f, fridge_setpoint / 10.0f); +} + +static void +cmd_set_fridge_difference(char *params) +{ + float new_f = atof(params); + if (new_f < 0 || new_f > 30) + { + printf_P(PSTR("Bad fridge value %f\n"), new_f); + return; + } + + fridge_difference = new_f * 10; + bool written = set_initial_eeprom(); + if (!written) + { + ATOMIC_BLOCK(ATOMIC_RESTORESTATE) + { + eeprom_write(fridge_difference, fridge_difference); + } + } + printf_P(PSTR("new fridge difference %.1fÂº\n"), fridge_difference / 10.0f); +} + +static void +cmd_set_fridge_delay(char *params) +{ + uint16_t new_delay = atoi(params); + if (new_delay < 5) + { + printf_P(PSTR("Bad fridge delay %d\n"), new_delay); + return; + } + + fridge_delay = new_delay; + bool written = set_initial_eeprom(); + if (!written) + { + ATOMIC_BLOCK(ATOMIC_RESTORESTATE) + { + eeprom_write(fridge_delay, fridge_delay); + } + } + printf_P(PSTR("new fridge delay %hu\n"), fridge_delay); +} + +static void +cmd_set_overshoot_factor(char *params) +{ + float new_f = atof(params); + if (new_f <= 0 || new_f > 20) + { + printf_P(PSTR("Bad overshoot factor %f\n"), new_f); + return; + } + + uint8_t old = overshoot_factor; + + overshoot_factor = new_f * 10; + bool written = set_initial_eeprom(); + if (!written) + { + if (old != overshoot_factor) + { + ATOMIC_BLOCK(ATOMIC_RESTORESTATE) + { + eeprom_write(overshoot_factor, overshoot_factor); + } + } + } + printf_P(PSTR("old factor %.1fÂº new factor %.1fÂº\n"), + old / 10.0f, overshoot_factor / 10.0f); +} + +static void +cmd_set_overshoot_delay(char *params) +{ + uint16_t new_delay = atoi(params); + if (new_delay < 5) + { + printf_P(PSTR("Bad overshoot delay %d\n"), new_delay); + return; + } + + overshoot_delay = new_delay; + bool written = set_initial_eeprom(); + if (!written) + { + ATOMIC_BLOCK(ATOMIC_RESTORESTATE) + { + eeprom_write(overshoot_delay, overshoot_delay); + } + } + printf_P(PSTR("new overshoot delay %hu\n"), overshoot_delay); +} + +static void +cmd_awake() +{ + stay_awake = 1; + printf_P(PSTR("awake\n")); +} + +static void +read_handler() +{ + if (strcmp_P(readbuf, PSTR("fetch")) == 0) + { + cmd_fetch(); + } + else if (strcmp_P(readbuf, PSTR("clear")) == 0) + { + cmd_clear(); + } + else if (strcmp_P(readbuf, PSTR("btoff")) == 0) + { + cmd_btoff(); + } + else if (strcmp_P(readbuf, PSTR("measure")) == 0) + { + cmd_measure(); + } + else if (strcmp_P(readbuf, PSTR("sensors")) == 0) + { + cmd_sensors(); + } + else if (strcmp_P(readbuf, PSTR("get_params")) == 0) + { + cmd_get_params(); + } + else if (strncmp_P(readbuf, PSTR("set_params "), 11) == 0) + { + cmd_set_params(&readbuf[11]); + } + else if (strcmp_P(readbuf, PSTR("awake")) == 0) + { + cmd_awake(); + } + else if (strncmp_P(readbuf, PSTR("fridge_setpoint "), 16) == 0) + { + cmd_set_fridge_setpoint(&readbuf[16]); + } + else if (strncmp_P(readbuf, PSTR("fridge_diff "), 12) == 0) + { + cmd_set_fridge_difference(&readbuf[12]); + } + else if (strncmp_P(readbuf, PSTR("fridge_delay "), 13) == 0) + { + cmd_set_fridge_delay(&readbuf[13]); + } + else if (strncmp_P(readbuf, PSTR("overshoot_delay "), 16) == 0) + { + cmd_set_overshoot_delay(&readbuf[16]); + } + else if (strncmp_P(readbuf, PSTR("overshoot_factor "), 17) == 0) + { + cmd_set_overshoot_factor(&readbuf[17]); + } + else if (strcmp_P(readbuf, PSTR("reset")) == 0) + { + cmd_reset(); + } + else + { + printf_P(PSTR("Bad command '%s'\n"), readbuf); + } +} + +ISR(INT0_vect) +{ + button_pressed = 1; + blink(); + _delay_ms(100); + blink(); +} + + +ISR(USART_RX_vect) +{ + char c = UDR0; +#ifdef HAVE_UART_ECHO + uart_putchar(c, NULL); +#endif + if (c == '\r' || c == '\n') + { + if (readpos > 0) + { + readbuf[readpos] = '\0'; + have_cmd = 1; + readpos = 0; + } + } + else + { + readbuf[readpos] = c; + readpos++; + if (readpos >= sizeof(readbuf)) + { + readpos = 0; + } + } +} + +ISR(TIMER2_COMPA_vect) +{ + TCNT2 = 0; + measure_count += TICK; + comms_count += TICK; + + clock_epoch += TICK; + + if (comms_timeout != 0) + { + comms_timeout -= TICK; + } + + if (measure_count >= measure_wake) + { + measure_count = 0; + need_measurement = 1; + } + + if (comms_count >= comms_wake) + { + comms_count = 0; + need_comms = 1; + } +} + +static void +deep_sleep() +{ + // p119 of manual + OCR2A = SLEEP_COMPARE; + loop_until_bit_is_clear(ASSR, OCR2AUB); + + set_sleep_mode(SLEEP_MODE_PWR_SAVE); + sleep_mode(); +} + +static void +idle_sleep() +{ + set_sleep_mode(SLEEP_MODE_IDLE); + sleep_mode(); +} + +static uint16_t +adc_vcc() +{ + PRR &= ~_BV(PRADC); + + // /16 prescaler + ADCSRA = _BV(ADEN) | _BV(ADPS2); + + // set to measure 1.1 reference + ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1); + // average a number of samples + uint16_t sum = 0; + uint8_t num = 0; + for (uint8_t n = 0; n < 20; n++) + { + ADCSRA |= _BV(ADSC); + loop_until_bit_is_clear(ADCSRA, ADSC); + + uint8_t low_11 = ADCL; + uint8_t high_11 = ADCH; + uint16_t val = low_11 + (high_11 << 8); + + if (n >= 4) + { + sum += val; + num++; + } + } + ADCSRA = 0; + PRR |= _BV(PRADC); + + //float res_volts = 1.1 * 1024 * num / sum; + //return 1000 * res_volts; + return ((uint32_t)1100*1024*num) / sum; +} + +static void +do_fridge() +{ + struct epoch_ticks now; + get_epoch_ticks(&now); + uint32_t off_time = now.ticks - fridge_off_clock.ticks; + bool wort_valid = last_wort != DS18X20_INVALID_DECICELSIUS; + bool fridge_valid = last_fridge != DS18X20_INVALID_DECICELSIUS; + + int16_t wort_max = fridge_setpoint + fridge_difference; + int16_t wort_min = fridge_setpoint; + + // the fridge min/max only apply if the wort sensor is broken + int16_t fridge_min = fridge_setpoint - FRIDGE_AIR_MIN_RANGE; + int16_t fridge_max = fridge_setpoint + FRIDGE_AIR_MAX_RANGE; + + uint8_t fridge_on = PORT_FRIDGE & _BV(PIN_FRIDGE); + printf_P(PSTR("last_wort %hd (%hd, %hd), last_fridge %hd (%hd, %hd), setpoint %hd, diff %hd, fridge_on %hhu\n"), + last_wort, wort_min, wort_max, + last_fridge, fridge_min, fridge_max, + fridge_setpoint, fridge_difference, fridge_on); + + if (off_time < fridge_delay) + { + printf_P(PSTR("waiting for fridge delay current %hu, wait %hu\n"), + off_time, fridge_delay); + return; + } + + // handle failure of the wort sensor. if it is a short (intermittent?) + // failure we wait until it has been broken for a period of time + // (WORT_INVALID_TIME) before doing anything. + if (wort_valid) + { + wort_valid_clock = now; + } + else + { + printf_P(PSTR("wort sensor is invalid\n")); + uint32_t invalid_time = now.ticks - wort_valid_clock.ticks; + if (invalid_time < WORT_INVALID_TIME) + { + printf("only been invalid for %ld, waiting\n", invalid_time); + return; + } + } + + if (!fridge_valid) + { + printf_P(PSTR("fridge sensor is invalid\n")); + } + + if (fridge_on) + { + bool turn_off = false; + uint16_t on_time = now.ticks - fridge_on_clock.ticks; + + uint16_t overshoot = 0; + if (on_time > overshoot_delay) + { + overshoot = overshoot_factor * MIN(OVERSHOOT_MAX_DIV, on_time) / OVERSHOOT_MAX_DIV; + } + + printf_P(PSTR("on_time %hu, overshoot %hu\n"), on_time, overshoot); + + // wort has cooled enough. will probably cool a bit more by itself + if (wort_valid) + { + if ((last_wort - overshoot) < fridge_setpoint) + { + printf_P(PSTR("wort has cooled enough, overshoot %hu on_time %hu\n"), overshoot, on_time); + turn_off = true; + } + } + else + { + if (fridge_valid && last_fridge < fridge_min) + { + printf_P(PSTR("fridge off fallback\n")); + turn_off = true; + } + } + + if (turn_off) + { + // too cold, turn off + printf_P(PSTR("Turning fridge off\n")); + PORT_FRIDGE &= ~_BV(PIN_FRIDGE); + fridge_off_clock = now; + } + } + else + { + bool turn_on = false; + + if (wort_valid) + { + if (last_wort >= wort_max) + { + printf_P(PSTR("wort is too hot\n")); + turn_on = true; + } + } + else + { + if (fridge_valid && last_fridge >= fridge_max) + { + printf_P(PSTR("fridge on fallback\n")); + turn_on = true; + } + } + + if (turn_on) + { + // too hot, turn on + printf_P(PSTR("Turning fridge on\n")); + PORT_FRIDGE |= _BV(PIN_FRIDGE); + fridge_on_clock = now; + } + } +} + +static void +do_measurement() +{ + blink(); + + /* Take the timer here since deep_sleep() below could take 6 seconds */ + get_epoch_ticks(&last_measurement_clock); + if (n_measurements == 0) + { + first_measurement_clock = last_measurement_clock; + } + + simple_ds18b20_start_meas(NULL); + _delay_ms(DS18B20_TCONV_12BIT); + + if (n_measurements == max_measurements) + { + n_measurements = 0; + } + + for (uint8_t s = 0; s < n_sensors; s++) + { + uint16_t reading; + uint8_t ret = simple_ds18b20_read_raw(sensor_id[s], &reading); + if (ret != DS18X20_OK) + { + reading = VALUE_BROKEN; + } + set_measurement(s, n_measurements, reading); + + if (memcmp(sensor_id[s], fridge_id, sizeof(fridge_id)) == 0) + { + last_fridge = ds18b20_raw16_to_decicelsius(reading); + } + if (memcmp(sensor_id[s], wort_id, sizeof(wort_id)) == 0) + { + last_wort = ds18b20_raw16_to_decicelsius(reading); + } + } + + n_measurements++; +} + +static void +do_comms() +{ + get_epoch_ticks(&last_comms_clock); + + // turn on bluetooth + set_aux_power(1); + // avoid receiving rubbish, perhaps + _delay_ms(50); + uart_on(); + + // write sd card here? same 3.3v regulator... + + for (comms_timeout = wake_secs; + comms_timeout > 0 || stay_awake; + ) + { + if (need_measurement) + { + need_measurement = 0; + do_measurement(); + do_fridge(); + continue; + } + + if (have_cmd) + { + have_cmd = 0; + read_handler(); + continue; + } + + // wait for commands from the master + idle_sleep(); + } + + uart_off(); + // in case bluetooth takes time to flush + _delay_ms(100); + set_aux_power(0); +} + +static void +blink() +{ + PORT_LED &= ~_BV(PIN_LED); + _delay_ms(1); + PORT_LED |= _BV(PIN_LED); +} + +static void +long_delay(int ms) +{ + int iter = ms / 100; + + for (int i = 0; i < iter; i++) + { + _delay_ms(100); + } +} + +ISR(BADISR_vect) +{ + //uart_on(); + printf_P(PSTR("Bad interrupt\n")); +} + +int main(void) +{ + setup_chip(); + blink(); + + set_aux_power(0); + + stdout = &mystdout; + uart_on(); + + printf(PSTR("Started.\n")); + + load_params(); + + init_sensors(); + + uart_off(); + + // turn off everything except timer2 + PRR = _BV(PRTWI) | _BV(PRTIM0) | _BV(PRTIM1) | _BV(PRSPI) | _BV(PRUSART0) | _BV(PRADC); + + setup_tick_counter(); + + sei(); + + need_comms = 1; + need_measurement = 1; + + stay_awake = 1; + + for(;;) + { + if (button_pressed) + { + // debounce + _delay_ms(200); + need_comms = 1; + comms_timeout = wake_secs; + button_pressed = 0; + continue; + } + + if (need_comms) + { + need_comms = 0; + do_comms(); + continue; + } + + if (need_measurement) + { + need_measurement = 0; + do_measurement(); + do_fridge(); + continue; + } + + deep_sleep(); + } + + return 0; /* never reached */ +} diff -r 000000000000 -r 8705acff2494 onewire.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/onewire.c Sat Jun 01 01:38:42 2013 +0800 @@ -0,0 +1,287 @@ +/* +Access Dallas 1-Wire Devices with ATMEL AVRs +Author of the initial code: Peter Dannegger (danni(at)specs.de) +modified by Martin Thomas (mthomas(at)rhrk.uni-kl.de) + 9/2004 - use of delay.h, optional bus configuration at runtime +10/2009 - additional delay in ow_bit_io for recovery + 5/2010 - timing modifcations, additonal config-values and comments, + use of atomic.h macros, internal pull-up support + 7/2010 - added method to skip recovery time after last bit transfered + via ow_command_skip_last_recovery +*/ + + +#include +#include +#include + +#include "onewire.h" + +#ifdef OW_ONE_BUS + +#define OW_GET_IN() ( OW_IN & (1< 1usec accoding to timing-diagramm + if ( b ) { + OW_DIR_IN(); // to write "1" release bus, resistor pulls high +#if OW_USE_INTERNAL_PULLUP + OW_OUT_HIGH(); +#endif + } + + // "Output data from the DS18B20 is valid for 15usec after the falling + // edge that initiated the read time slot. Therefore, the master must + // release the bus and then sample the bus state within 15ussec from + // the start of the slot." + _delay_us(15-2-OW_CONF_DELAYOFFSET); + + if( OW_GET_IN() == 0 ) { + b = 0; // sample at end of read-timeslot + } + + _delay_us(60-15-2+OW_CONF_DELAYOFFSET); +#if OW_USE_INTERNAL_PULLUP + OW_OUT_HIGH(); +#endif + OW_DIR_IN(); + + if ( with_parasite_enable ) { + ow_parasite_enable(); + } + + } /* ATOMIC_BLOCK */ + + _delay_us(OW_RECOVERY_TIME); // may be increased for longer wires + + return b; +} + +uint8_t ow_bit_io( uint8_t b ) +{ + return ow_bit_io_intern( b & 1, 0 ); +} + +uint8_t ow_byte_wr( uint8_t b ) +{ + uint8_t i = 8, j; + + do { + j = ow_bit_io( b & 1 ); + b >>= 1; + if( j ) { + b |= 0x80; + } + } while( --i ); + + return b; +} + +uint8_t ow_byte_wr_with_parasite_enable( uint8_t b ) +{ + uint8_t i = 8, j; + + do { + if ( i != 1 ) { + j = ow_bit_io_intern( b & 1, 0 ); + } else { + j = ow_bit_io_intern( b & 1, 1 ); + } + b >>= 1; + if( j ) { + b |= 0x80; + } + } while( --i ); + + return b; +} + + +uint8_t ow_byte_rd( void ) +{ + // read by sending only "1"s, so bus gets released + // after the init low-pulse in every slot + return ow_byte_wr( 0xFF ); +} + + +uint8_t ow_rom_search( uint8_t diff, uint8_t *id ) +{ + uint8_t i, j, next_diff; + uint8_t b; + + if( ow_reset() ) { + return OW_PRESENCE_ERR; // error, no device found <--- early exit! + } + + ow_byte_wr( OW_SEARCH_ROM ); // ROM search command + next_diff = OW_LAST_DEVICE; // unchanged on last device + + i = OW_ROMCODE_SIZE * 8; // 8 bytes + + do { + j = 8; // 8 bits + do { + b = ow_bit_io( 1 ); // read bit + if( ow_bit_io( 1 ) ) { // read complement bit + if( b ) { // 0b11 + return OW_DATA_ERR; // data error <--- early exit! + } + } + else { + if( !b ) { // 0b00 = 2 devices + if( diff > i || ((*id & 1) && diff != i) ) { + b = 1; // now 1 + next_diff = i; // next pass 0 + } + } + } + ow_bit_io( b ); // write bit + *id >>= 1; + if( b ) { + *id |= 0x80; // store bit + } + + i--; + + } while( --j ); + + id++; // next byte + + } while( i ); + + return next_diff; // to continue search +} + + +static void ow_command_intern( uint8_t command, uint8_t *id, uint8_t with_parasite_enable ) +{ + uint8_t i; + + ow_reset(); + + if( id ) { + ow_byte_wr( OW_MATCH_ROM ); // to a single device + i = OW_ROMCODE_SIZE; + do { + ow_byte_wr( *id ); + id++; + } while( --i ); + } + else { + ow_byte_wr( OW_SKIP_ROM ); // to all devices + } + + if ( with_parasite_enable ) { + ow_byte_wr_with_parasite_enable( command ); + } else { + ow_byte_wr( command ); + } +} + +void ow_command( uint8_t command, uint8_t *id ) +{ + ow_command_intern( command, id, 0); +} + +void ow_command_with_parasite_enable( uint8_t command, uint8_t *id ) +{ + ow_command_intern( command, id, 1 ); +} + diff -r 000000000000 -r 8705acff2494 onewire.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/onewire.h Sat Jun 01 01:38:42 2013 +0800 @@ -0,0 +1,93 @@ +#ifndef ONEWIRE_H_ +#define ONEWIRE_H_ + +#ifdef __cplusplus +extern "C" { +#endif + +#include + +/*******************************************/ +/* Hardware connection */ +/*******************************************/ + +/* Define OW_ONE_BUS if only one 1-Wire-Bus is used + in the application -> shorter code. + If not defined make sure to call ow_set_bus() before using + a bus. Runtime bus-select increases code size by around 300 + bytes so use OW_ONE_BUS if possible */ +#define OW_ONE_BUS + +#ifdef OW_ONE_BUS + +#define OW_PIN PB1 +#define OW_IN PINB +#define OW_OUT PORTB +#define OW_DDR DDRB +#define OW_CONF_DELAYOFFSET 0 + +#else +#if ( F_CPU < 1843200 ) +#warning | Experimental multi-bus-mode is not tested for +#warning | frequencies below 1,84MHz. Use OW_ONE_WIRE or +#warning | faster clock-source (i.e. internal 2MHz R/C-Osc.). +#endif +#define OW_CONF_CYCLESPERACCESS 13 +#define OW_CONF_DELAYOFFSET ( (uint16_t)( ((OW_CONF_CYCLESPERACCESS) * 1000000L) / F_CPU ) ) +#endif + +// Recovery time (T_Rec) minimum 1usec - increase for long lines +// 5 usecs is a value give in some Maxim AppNotes +// 30u secs seem to be reliable for longer lines +//#define OW_RECOVERY_TIME 5 /* usec */ +//#define OW_RECOVERY_TIME 300 /* usec */ +#define OW_RECOVERY_TIME 10 /* usec */ + +// Use AVR's internal pull-up resistor instead of external 4,7k resistor. +// Based on information from Sascha Schade. Experimental but worked in tests +// with one DS18B20 and one DS18S20 on a rather short bus (60cm), where both +// sensores have been parasite-powered. +#define OW_USE_INTERNAL_PULLUP 1 /* 0=external, 1=internal */ + +/*******************************************/ + + +#define OW_MATCH_ROM 0x55 +#define OW_SKIP_ROM 0xCC +#define OW_SEARCH_ROM 0xF0 + +#define OW_SEARCH_FIRST 0xFF // start new search +#define OW_PRESENCE_ERR 0xFF +#define OW_DATA_ERR 0xFE +#define OW_LAST_DEVICE 0x00 // last device found + +// rom-code size including CRC +#define OW_ROMCODE_SIZE 8 + +extern uint8_t ow_reset(void); + +extern uint8_t ow_bit_io( uint8_t b ); +extern uint8_t ow_byte_wr( uint8_t b ); +extern uint8_t ow_byte_rd( void ); + +extern uint8_t ow_rom_search( uint8_t diff, uint8_t *id ); + +extern void ow_command( uint8_t command, uint8_t *id ); +extern void ow_command_with_parasite_enable( uint8_t command, uint8_t *id ); + +extern void ow_parasite_enable( void ); +extern void ow_parasite_disable( void ); +extern uint8_t ow_input_pin_state( void ); + +#ifndef OW_ONE_BUS +extern void ow_set_bus( volatile uint8_t* in, + volatile uint8_t* out, + volatile uint8_t* ddr, + uint8_t pin ); +#endif + +#ifdef __cplusplus +} +#endif + +#endif diff -r 000000000000 -r 8705acff2494 sha1-asm.S --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/sha1-asm.S Sat Jun 01 01:38:42 2013 +0800 @@ -0,0 +1,883 @@ +/* sha1-asm.S */ +/* + This file is part of the AVR-Crypto-Lib. + Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ +/* + * Author: Daniel Otte + * + * License: GPLv3 or later +*/ +; SHA1 implementation in assembler for AVR +SHA1_BLOCK_BITS = 512 +SHA1_HASH_BITS = 160 + +.macro precall + /* push r18 - r27, r30 - r31*/ + push r0 + push r1 + push r18 + push r19 + push r20 + push r21 + push r22 + push r23 + push r24 + push r25 + push r26 + push r27 + push r30 + push r31 + clr r1 +.endm + +.macro postcall + pop r31 + pop r30 + pop r27 + pop r26 + pop r25 + pop r24 + pop r23 + pop r22 + pop r21 + pop r20 + pop r19 + pop r18 + pop r1 + pop r0 +.endm + + +.macro hexdump length + push r27 + push r26 + ldi r25, '\r' + mov r24, r25 + call uart_putc + ldi r25, '\n' + mov r24, r25 + call uart_putc + pop r26 + pop r27 + movw r24, r26 +.if \length > 16 + ldi r22, lo8(16) + ldi r23, hi8(16) + push r27 + push r26 + call uart_hexdump + pop r26 + pop r27 + adiw r26, 16 + hexdump \length-16 +.else + ldi r22, lo8(\length) + ldi r23, hi8(\length) + call uart_hexdump +.endif +.endm + +.macro delay +/* + push r0 + push r1 + clr r0 +1: clr r1 +2: dec r1 + brne 2b + dec r0 + brne 1b + pop r1 + pop r0 // */ +.endm + +/* X points to Block */ +.macro dbg_hexdump length +/* + precall + hexdump \length + postcall + // */ +.endm + + + +.section .text + +SPL = 0x3D +SPH = 0x3E +SREG = 0x3F + + +; +;sha1_ctx_t is: +; +; [h0][h1][h2][h3][h4][length] +; hn is 32 bit large, length is 64 bit large + +;########################################################### + +.global sha1_ctx2hash +; === sha1_ctx2hash === +; this function converts a state into a normal hash (bytestring) +; param1: the 16-bit destination pointer +; given in r25,r24 (r25 is most significant) +; param2: the 16-bit pointer to sha1_ctx structure +; given in r23,r22 +sha1_ctx2hash: + movw r26, r22 + movw r30, r24 + ldi r21, 5 + sbiw r26, 4 +1: + ldi r20, 4 + adiw r26, 8 +2: + ld r0, -X + st Z+, r0 + dec r20 + brne 2b + + dec r21 + brne 1b + + ret + +;########################################################### + +.global sha1 +; === sha1 === +; this function calculates SHA-1 hashes from messages in RAM +; param1: the 16-bit hash destination pointer +; given in r25,r24 (r25 is most significant) +; param2: the 16-bit pointer to message +; given in r23,r22 +; param3: 32-bit length value (length of message in bits) +; given in r21,r20,r19,r18 +sha1: +sha1_prolog: + push r8 + push r9 + push r10 + push r11 + push r12 + push r13 + push r16 + push r17 + in r30, SPL + in r31, SPH + sbiw r30, 5*4+8 + in r0, SREG + cli + out SPL, r30 + out SREG, r0 + out SPH, r31 + + push r25 + push r24 + adiw r30, 1 + movw r16, r30 + + movw r8, r18 /* backup of length*/ + movw r10, r20 + + movw r12, r22 /* backup pf msg-ptr */ + + movw r24, r16 + rcall sha1_init + /* if length >= 512 */ +1: + tst r11 + brne 2f + tst r10 + breq 4f +2: + movw r24, r16 + movw r22, r12 + rcall sha1_nextBlock + ldi r19, 64 + add r12, r19 + adc r13, r1 + /* length -= 512 */ + ldi r19, 0x02 + sub r9, r19 + sbc r10, r1 + sbc r11, r1 + rjmp 1b + +4: + movw r24, r16 + movw r22, r12 + movw r20, r8 + rcall sha1_lastBlock + + pop r24 + pop r25 + movw r22, r16 + rcall sha1_ctx2hash + +sha1_epilog: + in r30, SPL + in r31, SPH + adiw r30, 5*4+8 + in r0, SREG + cli + out SPL, r30 + out SREG, r0 + out SPH, r31 + pop r17 + pop r16 + pop r13 + pop r12 + pop r11 + pop r10 + pop r9 + pop r8 + ret + +;########################################################### + + +; block MUST NOT be larger than 64 bytes + +.global sha1_lastBlock +; === sha1_lastBlock === +; this function does padding & Co. for calculating SHA-1 hashes +; param1: the 16-bit pointer to sha1_ctx structure +; given in r25,r24 (r25 is most significant) +; param2: an 16-bit pointer to 64 byte block to hash +; given in r23,r22 +; param3: an 16-bit integer specifing length of block in bits +; given in r21,r20 +sha1_lastBlock_localSpace = (SHA1_BLOCK_BITS/8+1) + + +sha1_lastBlock: + cpi r21, 0x02 + brlo sha1_lastBlock_prolog + push r25 + push r24 + push r23 + push r22 + push r21 + push r20 + rcall sha1_nextBlock + pop r20 + pop r21 + pop r22 + pop r23 + pop r24 + pop r25 + subi r21, 2 + ldi r19, 64 + add r22, r19 + adc r23, r1 + rjmp sha1_lastBlock +sha1_lastBlock_prolog: + /* allocate space on stack */ + in r30, SPL + in r31, SPH + in r0, SREG + subi r30, lo8(64) + sbci r31, hi8(64) /* ??? */ + cli + out SPL, r30 + out SREG, r0 + out SPH, r31 + + adiw r30, 1 /* SP points to next free byte on stack */ + mov r18, r20 /* r20 = LSB(length) */ + lsr r18 + lsr r18 + lsr r18 + bst r21, 0 /* may be we should explain this ... */ + bld r18, 5 /* now: r18 == length/8 (aka. length in bytes) */ + + + movw r26, r22 /* X points to begin of msg */ + tst r18 + breq sha1_lastBlock_post_copy + mov r1, r18 +sha1_lastBlock_copy_loop: + ld r0, X+ + st Z+, r0 + dec r1 + brne sha1_lastBlock_copy_loop +sha1_lastBlock_post_copy: +sha1_lastBlock_insert_stuffing_bit: + ldi r19, 0x80 + mov r0,r19 + ldi r19, 0x07 + and r19, r20 /* if we are in bitmode */ + breq 2f /* no bitmode */ +1: + lsr r0 + dec r19 + brne 1b + ld r19, X +/* maybe we should do some ANDing here, just for safety */ + or r0, r19 +2: + st Z+, r0 + inc r18 + +/* checking stuff here */ + cpi r18, 64-8+1 + brsh 0f + rjmp sha1_lastBlock_insert_zeros +0: + /* oh shit, we landed here */ + /* first we have to fill it up with zeros */ + ldi r19, 64 + sub r19, r18 + breq 2f +1: + st Z+, r1 + dec r19 + brne 1b +2: + sbiw r30, 63 + sbiw r30, 1 + movw r22, r30 + + push r31 + push r30 + push r25 + push r24 + push r21 + push r20 + rcall sha1_nextBlock + pop r20 + pop r21 + pop r24 + pop r25 + pop r30 + pop r31 + + /* now we should subtract 512 from length */ + movw r26, r24 + adiw r26, 4*5+1 /* we can skip the lowest byte */ + ld r19, X + subi r19, hi8(512) + st X+, r19 + ldi r18, 6 +1: + ld r19, X + sbci r19, 0 + st X+, r19 + dec r18 + brne 1b + +; clr r18 /* not neccessary ;-) */ + /* reset Z pointer to begin of block */ + +sha1_lastBlock_insert_zeros: + ldi r19, 64-8 + sub r19, r18 + breq sha1_lastBlock_insert_length + clr r1 +1: + st Z+, r1 /* r1 is still zero */ + dec r19 + brne 1b + +; rjmp sha1_lastBlock_epilog +sha1_lastBlock_insert_length: + movw r26, r24 /* X points to state */ + adiw r26, 5*4 /* X points to (state.length) */ + adiw r30, 8 /* Z points one after the last byte of block */ + ld r0, X+ + add r0, r20 + st -Z, r0 + ld r0, X+ + adc r0, r21 + st -Z, r0 + ldi r19, 6 +1: + ld r0, X+ + adc r0, r1 + st -Z, r0 + dec r19 + brne 1b + + sbiw r30, 64-8 + movw r22, r30 + rcall sha1_nextBlock + +sha1_lastBlock_epilog: + in r30, SPL + in r31, SPH + in r0, SREG + adiw r30, 63 ; lo8(64) + adiw r30, 1 ; hi8(64) + cli + out SPL, r30 + out SREG, r0 + out SPH, r31 + clr r1 + ret + +/**/ +;########################################################### + +.global sha1_nextBlock +; === sha1_nextBlock === +; this is the core function for calculating SHA-1 hashes +; param1: the 16-bit pointer to sha1_ctx structure +; given in r25,r24 (r25 is most significant) +; param2: an 16-bit pointer to 64 byte block to hash +; given in r23,r22 +sha1_nextBlock_localSpace = (16+5+1)*4 ; 16 32-bit values for w array and 5 32-bit values for a array (total 84 byte) + +xtmp = 0 +xNULL = 1 +W1 = 10 +W2 = 11 +T1 = 12 +T2 = 13 +T3 = 14 +T4 = 15 +LoopC = 16 +S = 17 +tmp1 = 18 +tmp2 = 19 +tmp3 = 20 +tmp4 = 21 +F1 = 22 +F2 = 23 +F3 = 24 +F4 = 25 + +/* byteorder: high number <--> high significance */ +sha1_nextBlock: + ; initial, let's make some space ready for local vars + /* replace push & pop by mem ops? */ + push r10 + push r11 + push r12 + push r13 + push r14 + push r15 + push r16 + push r17 + push r28 + push r29 + in r20, SPL + in r21, SPH + movw r18, r20 ;backup SP +; movw r26, r20 ; X points to free space on stack /* maybe removeable? */ + movw r30, r22 ; Z points to message + subi r20, lo8(sha1_nextBlock_localSpace) ;sbiw can do only up to 63 + sbci r21, hi8(sha1_nextBlock_localSpace) + movw r26, r20 ; X points to free space on stack + in r0, SREG + cli ; we want to be uninterrupted while updating SP + out SPL, r20 + out SREG, r0 + out SPH, r21 + + push r18 + push r19 /* push old SP on new stack */ + push r24 + push r25 /* param1 will be needed later */ + + /* load a[] with state */ + movw 28, r24 /* load pointer to state in Y */ + adiw r26, 1 ; X++ + + ldi LoopC, 5*4 +1: ld tmp1, Y+ + st X+, tmp1 + dec LoopC + brne 1b + + movw W1, r26 /* save pointer to w[0] */ + /* load w[] with endian fixed message */ + /* we might also use the changeendian32() function at bottom */ + movw r30, r22 /* mv param2 (ponter to msg) to Z */ + ldi LoopC, 16 +1: + ldd tmp1, Z+3 + st X+, tmp1 + ldd tmp1, Z+2 + st X+, tmp1 + ldd tmp1, Z+1 + st X+, tmp1 + ld tmp1, Z + st X+, tmp1 + adiw r30, 4 + dec LoopC + brne 1b + + ;clr LoopC /* LoopC is named t in FIPS 180-2 */ + clr xtmp +sha1_nextBlock_mainloop: + mov S, LoopC + lsl S + lsl S + andi S, 0x3C /* S is a bytepointer so *4 */ + /* load w[s] */ + movw r26, W1 + add r26, S /* X points at w[s] */ + adc r27, xNULL + ld T1, X+ + ld T2, X+ + ld T3, X+ + ld T4, X+ + +/* + push r26 + push r27 + push T4 + push T3 + push T2 + push T1 + in r26, SPL + in r27, SPH + adiw r26, 1 + dbg_hexdump 4 + pop T1 + pop T2 + pop T3 + pop T4 + pop r27 + pop r26 +*/ + + cpi LoopC, 16 + brlt sha1_nextBlock_mainloop_core + /* update w[s] */ + ldi tmp1, 2*4 + rcall 1f + ldi tmp1, 8*4 + rcall 1f + ldi tmp1, 13*4 + rcall 1f + rjmp 2f +1: /* this might be "outsourced" to save the jump above */ + add tmp1, S + andi tmp1, 0x3f + movw r26, W1 + add r26, tmp1 + adc r27, xNULL + ld tmp2, X+ + eor T1, tmp2 + ld tmp2, X+ + eor T2, tmp2 + ld tmp2, X+ + eor T3, tmp2 + ld tmp2, X+ + eor T4, tmp2 + ret +2: /* now we just hav to do a ROTL(T) and save T back */ + mov tmp2, T4 + rol tmp2 + rol T1 + rol T2 + rol T3 + rol T4 + movw r26, W1 + add r26, S + adc r27, xNULL + st X+, T1 + st X+, T2 + st X+, T3 + st X+, T4 + +sha1_nextBlock_mainloop_core: /* ther core function; T=ROTL5(a) ....*/ + /* T already contains w[s] */ + movw r26, W1 + sbiw r26, 4*1 /* X points at a[4] aka e */ + ld tmp1, X+ + add T1, tmp1 + ld tmp1, X+ + adc T2, tmp1 + ld tmp1, X+ + adc T3, tmp1 + ld tmp1, X+ + adc T4, tmp1 /* T = w[s]+e */ + sbiw r26, 4*5 /* X points at a[0] aka a */ + ld F1, X+ + ld F2, X+ + ld F3, X+ + ld F4, X+ + mov tmp1, F4 /* X points at a[1] aka b */ + ldi tmp2, 5 +1: + rol tmp1 + rol F1 + rol F2 + rol F3 + rol F4 + dec tmp2 + brne 1b + + add T1, F1 + adc T2, F2 + adc T3, F3 + adc T4, F4 /* T = ROTL(a,5) + e + w[s] */ + + /* now we have to do this fucking conditional stuff */ + ldi r30, lo8(sha1_nextBlock_xTable) + ldi r31, hi8(sha1_nextBlock_xTable) + add r30, xtmp + adc r31, xNULL + lpm tmp1, Z + cp tmp1, LoopC + brne 1f + inc xtmp +1: ldi r30, lo8(sha1_nextBlock_KTable) + ldi r31, hi8(sha1_nextBlock_KTable) + lsl xtmp + lsl xtmp + add r30, xtmp + adc r31, xNULL + lsr xtmp + lsr xtmp + + lpm tmp1, Z+ + add T1, tmp1 + lpm tmp1, Z+ + adc T2, tmp1 + lpm tmp1, Z+ + adc T3, tmp1 + lpm tmp1, Z+ + adc T4, tmp1 + /* T = ROTL(a,5) + e + kt + w[s] */ + + /* Z-4 is just pointing to kt ... */ + movw r28, r26 /* copy X in Y */ + adiw r30, 3*4 /* now Z points to the rigth locatin in our jump-vector-table */ + lsr r31 + ror r30 + + icall + mov F1, tmp1 + icall + mov F2, tmp1 + icall + mov F3, tmp1 + icall + + add T1, F1 + adc T2, F2 + adc T3, F3 + adc T4, tmp1 /* T = ROTL5(a) + f_t(b,c,d) + e + k_t + w[s] */ + /* X points still at a[1] aka b, Y points at a[2] aka c */ + /* update a[] */ +sha1_nextBlock_update_a: + /*first we move all vars in a[] "one up" e=d, d=c, c=b, b=a*/ + //adiw r28, 3*4 /* Y should point at a[4] aka e */ + movw r28, W1 + sbiw r28, 4 + + ldi tmp2, 4*4 +1: + ld tmp1, -Y + std Y+4, tmp1 + dec tmp2 + brne 1b + /* Y points at a[0] aka a*/ + + movw r28, W1 + sbiw r28, 5*4 + /* store T in a[0] aka a */ + st Y+, T1 + st Y+, T2 + st Y+, T3 + st Y+, T4 + /* Y points at a[1] aka b*/ + + /* rotate c */ + ldd T1, Y+1*4 + ldd T2, Y+1*4+1 + ldd T3, Y+1*4+2 + ldd T4, Y+1*4+3 + mov tmp1, T1 + ldi tmp2, 2 +1: ror tmp1 + ror T4 + ror T3 + ror T2 + ror T1 + dec tmp2 + brne 1b + std Y+1*4+0, T1 + std Y+1*4+1, T2 + std Y+1*4+2, T3 + std Y+1*4+3, T4 +/* + push r27 + push r26 + movw r26, W1 + sbiw r26, 4*5 + dbg_hexdump 4*5 + pop r26 + pop r27 +*/ + inc LoopC + cpi LoopC, 80 + brge 1f + rjmp sha1_nextBlock_mainloop +/**************************************/ +1: + /* littel patch */ + sbiw r28, 4 + +/* add a[] to state and inc length */ + pop r27 + pop r26 /* now X points to state (and Y still at a[0]) */ + ldi tmp4, 5 +1: clc + ldi tmp3, 4 +2: ld tmp1, X + ld tmp2, Y+ + adc tmp1, tmp2 + st X+, tmp1 + dec tmp3 + brne 2b + dec tmp4 + brne 1b + + /* now length += 512 */ + adiw r26, 1 /* we skip the least significant byte */ + ld tmp1, X + ldi tmp2, hi8(512) /* 2 */ + add tmp1, tmp2 + st X+, tmp1 + ldi tmp2, 6 +1: + ld tmp1, X + adc tmp1, xNULL + st X+, tmp1 + dec tmp2 + brne 1b + +; EPILOG +sha1_nextBlock_epilog: +/* now we should clean up the stack */ + pop r21 + pop r20 + in r0, SREG + cli ; we want to be uninterrupted while updating SP + out SPL, r20 + out SREG, r0 + out SPH, r21 + + clr r1 + pop r29 + pop r28 + pop r17 + pop r16 + pop r15 + pop r14 + pop r13 + pop r12 + pop r11 + pop r10 + ret + +sha1_nextBlock_xTable: +.byte 20,40,60,0 +sha1_nextBlock_KTable: +.int 0x5a827999 +.int 0x6ed9eba1 +.int 0x8f1bbcdc +.int 0xca62c1d6 +sha1_nextBlock_JumpTable: +rjmp sha1_nextBlock_Ch + nop +rjmp sha1_nextBlock_Parity + nop +rjmp sha1_nextBlock_Maj + nop +rjmp sha1_nextBlock_Parity + + /* X and Y still point at a[1] aka b ; return value in tmp1 */ +sha1_nextBlock_Ch: + ld tmp1, Y+ + mov tmp2, tmp1 + com tmp2 + ldd tmp3, Y+3 /* load from c */ + and tmp1, tmp3 + ldd tmp3, Y+7 /* load from d */ + and tmp2, tmp3 + eor tmp1, tmp2 + ret + +sha1_nextBlock_Maj: + ld tmp1, Y+ + mov tmp2, tmp1 + ldd tmp3, Y+3 /* load from c */ + and tmp1, tmp3 + ldd tmp4, Y+7 /* load from d */ + and tmp2, tmp4 + eor tmp1, tmp2 + and tmp3, tmp4 + eor tmp1, tmp3 + ret + +sha1_nextBlock_Parity: + ld tmp1, Y+ + ldd tmp2, Y+3 /* load from c */ + eor tmp1, tmp2 + ldd tmp2, Y+7 /* load from d */ + eor tmp1, tmp2 + ret +/* +ch_str: .asciz "\r\nCh" +maj_str: .asciz "\r\nMaj" +parity_str: .asciz "\r\nParity" +*/ +;########################################################### + +.global sha1_init +;void sha1_init(sha1_ctx_t *state){ +; DEBUG_S("\r\nSHA1_INIT"); +; state->h[0] = 0x67452301; +; state->h[1] = 0xefcdab89; +; state->h[2] = 0x98badcfe; +; state->h[3] = 0x10325476; +; state->h[4] = 0xc3d2e1f0; +; state->length = 0; +;} +; param1: (Func3,r24) 16-bit pointer to sha1_ctx_t struct in ram +; modifys: Z(r30,r31), Func1, r22 +sha1_init: + movw r26, r24 ; (24,25) --> (26,27) load X with param1 + ldi r30, lo8((sha1_init_vector)) + ldi r31, hi8((sha1_init_vector)) + ldi r22, 5*4 /* bytes to copy */ +sha1_init_vloop: + lpm r23, Z+ + st X+, r23 + dec r22 + brne sha1_init_vloop + ldi r22, 8 +sha1_init_lloop: + st X+, r1 + dec r22 + brne sha1_init_lloop + ret + +sha1_init_vector: +.int 0x67452301; +.int 0xefcdab89; +.int 0x98badcfe; +.int 0x10325476; +.int 0xc3d2e1f0; + diff -r 000000000000 -r 8705acff2494 sha1.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/sha1.c Sat Jun 01 01:38:42 2013 +0800 @@ -0,0 +1,243 @@ +/* sha1.c */ +/* + This file is part of the AVR-Crypto-Lib. + Copyright (C) 2008, 2009 Daniel Otte (daniel.otte@rub.de) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ +/** + * \file sha1.c + * \author Daniel Otte + * \date 2006-10-08 + * \license GPLv3 or later + * \brief SHA-1 implementation. + * + */ + +#include /* memcpy & co */ +#include +#include "config.h" +#include "debug.h" +#include "sha1.h" + +#ifdef DEBUG +# undef DEBUG +#endif + +#include "cli.h" + +#define LITTLE_ENDIAN + +/********************************************************************************************************/ + +/** + * \brief initialises given SHA-1 context + * + */ +void sha1_init(sha1_ctx_t *state){ + DEBUG_S("\r\nSHA1_INIT"); + state->h[0] = 0x67452301; + state->h[1] = 0xefcdab89; + state->h[2] = 0x98badcfe; + state->h[3] = 0x10325476; + state->h[4] = 0xc3d2e1f0; + state->length = 0; +} + +/********************************************************************************************************/ +/* some helping functions */ +uint32_t rotl32(uint32_t n, uint8_t bits){ + return ((n<>(32-bits))); +} + +uint32_t change_endian32(uint32_t x){ + return (((x)<<24) | ((x)>>24) | (((x)& 0x0000ff00)<<8) | (((x)& 0x00ff0000)>>8)); +} + + +/* three SHA-1 inner functions */ +uint32_t ch(uint32_t x, uint32_t y, uint32_t z){ + DEBUG_S("\r\nCH"); + return ((x&y)^((~x)&z)); +} + +uint32_t maj(uint32_t x, uint32_t y, uint32_t z){ + DEBUG_S("\r\nMAJ"); + return ((x&y)^(x&z)^(y&z)); +} + +uint32_t parity(uint32_t x, uint32_t y, uint32_t z){ + DEBUG_S("\r\nPARITY"); + return ((x^y)^z); +} + +/********************************************************************************************************/ +/** + * \brief "add" a block to the hash + * This is the core function of the hash algorithm. To understand how it's working + * and what thoese variables do, take a look at FIPS-182. This is an "alternativ" implementation + */ + +#define MASK 0x0000000f + +typedef uint32_t (*pf_t)(uint32_t x, uint32_t y, uint32_t z); + +void sha1_nextBlock (sha1_ctx_t *state, const void* block){ + uint32_t a[5]; + uint32_t w[16]; + uint32_t temp; + uint8_t t,s,fi, fib; + pf_t f[] = {ch,parity,maj,parity}; + uint32_t k[4]={ 0x5a827999, + 0x6ed9eba1, + 0x8f1bbcdc, + 0xca62c1d6}; + + /* load the w array (changing the endian and so) */ + for(t=0; t<16; ++t){ + w[t] = change_endian32(((uint32_t*)block)[t]); + } + +#if DEBUG + uint8_t dbgi; + for(dbgi=0; dbgi<16; ++dbgi){ + /* + DEBUG_S("\n\rBlock:"); + DEBUG_B(dbgi); + DEBUG_C(':'); + */ + cli_putstr_P(PSTR("\r\nBlock:")); + cli_hexdump(&dbgi, 1); + cli_putc(':'); + cli_hexdump(&(w[dbgi]) ,4); + } +#endif + + /* load the state */ + memcpy(a, state->h, 5*sizeof(uint32_t)); + + + /* the fun stuff */ + for(fi=0,fib=0,t=0; t<=79; ++t){ + s = t & MASK; + if(t>=16){ + #if DEBUG + DEBUG_S("\r\n ws = "); cli_hexdump(&(w[s]), 4); + #endif + w[s] = rotl32( w[(s+13)&MASK] ^ w[(s+8)&MASK] ^ + w[(s+ 2)&MASK] ^ w[s] ,1); + #ifdef DEBUG + DEBUG_S(" --> ws = "); cli_hexdump(&(w[s]), 4); + #endif + } + + uint32_t dtemp; + temp = rotl32(a[0],5) + (dtemp=f[fi](a[1],a[2],a[3])) + a[4] + k[fi] + w[s]; + memmove(&(a[1]), &(a[0]), 4*sizeof(uint32_t)); /* e=d; d=c; c=b; b=a; */ + a[0] = temp; + a[2] = rotl32(a[2],30); /* we might also do rotr32(c,2) */ + fib++; + if(fib==20){ + fib=0; + fi = (fi+1)%4; + } + #if DEBUG + /* debug dump */ + DEBUG_S("\r\nt = "); DEBUG_B(t); + DEBUG_S("; a[]: "); + cli_hexdump(a, 5*4); + DEBUG_S("; k = "); + cli_hexdump(&(k[t/20]), 4); + DEBUG_S("; f(b,c,d) = "); + cli_hexdump(&dtemp, 4); + #endif + } + + /* update the state */ + for(t=0; t<5; ++t){ + state->h[t] += a[t]; + } + state->length += 512; +} + +/********************************************************************************************************/ + +void sha1_lastBlock(sha1_ctx_t *state, const void* block, uint16_t length){ + uint8_t lb[SHA1_BLOCK_BYTES]; /* local block */ + while(length>=SHA1_BLOCK_BITS){ + sha1_nextBlock(state, block); + length -= SHA1_BLOCK_BITS; + block = (uint8_t*)block + SHA1_BLOCK_BYTES; + } + state->length += length; + memset(lb, 0, SHA1_BLOCK_BYTES); + memcpy (lb, block, (length+7)>>3); + + /* set the final one bit */ + lb[length>>3] |= 0x80>>(length & 0x07); + + if (length>512-64-1){ /* not enouth space for 64bit length value */ + sha1_nextBlock(state, lb); + state->length -= 512; + memset(lb, 0, SHA1_BLOCK_BYTES); + } + /* store the 64bit length value */ +#if defined LITTLE_ENDIAN + /* this is now rolled up */ + uint8_t i; + for (i=0; i<8; ++i){ + lb[56+i] = ((uint8_t*)&(state->length))[7-i]; + } +#elif defined BIG_ENDIAN + *((uint64_t)&(lb[56])) = state->length; +#endif + sha1_nextBlock(state, lb); +} + +/********************************************************************************************************/ + +void sha1_ctx2hash (void *dest, sha1_ctx_t *state){ +#if defined LITTLE_ENDIAN + uint8_t i; + for(i=0; i<5; ++i){ + ((uint32_t*)dest)[i] = change_endian32(state->h[i]); + } +#elif BIG_ENDIAN + if (dest != state->h) + memcpy(dest, state->h, SHA1_HASH_BITS/8); +#else +# error unsupported endian type! +#endif +} + +/********************************************************************************************************/ +/** + * + * + */ +void sha1 (void *dest, const void* msg, uint32_t length){ + sha1_ctx_t s; + DEBUG_S("\r\nBLA BLUB"); + sha1_init(&s); + while(length & (~0x0001ff)){ /* length>=512 */ + DEBUG_S("\r\none block"); + sha1_nextBlock(&s, msg); + msg = (uint8_t*)msg + SHA1_BLOCK_BITS/8; /* increment pointer to next block */ + length -= SHA1_BLOCK_BITS; + } + sha1_lastBlock(&s, msg, length); + sha1_ctx2hash(dest, &s); +} + + diff -r 000000000000 -r 8705acff2494 sha1.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/sha1.h Sat Jun 01 01:38:42 2013 +0800 @@ -0,0 +1,119 @@ +/* sha1.h */ +/* + This file is part of the AVR-Crypto-Lib. + Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . +*/ +/** + * \file sha1.h + * \author Daniel Otte + * \email daniel.otte@rub.de + * \date 2006-10-08 + * \license GPLv3 or later + * \brief SHA-1 declaration. + * \ingroup SHA-1 + * + */ + +#ifndef SHA1_H_ +#define SHA1_H_ + +#include +/** \def SHA1_HASH_BITS + * definees the size of a SHA-1 hash in bits + */ + +/** \def SHA1_HASH_BYTES + * definees the size of a SHA-1 hash in bytes + */ + +/** \def SHA1_BLOCK_BITS + * definees the size of a SHA-1 input block in bits + */ + +/** \def SHA1_BLOCK_BYTES + * definees the size of a SHA-1 input block in bytes + */ +#define SHA1_HASH_BITS 160 +#define SHA1_HASH_BYTES (SHA1_HASH_BITS/8) +#define SHA1_BLOCK_BITS 512 +#define SHA1_BLOCK_BYTES (SHA1_BLOCK_BITS/8) + +/** \typedef sha1_ctx_t + * \brief SHA-1 context type + * + * A vatiable of this type may hold the state of a SHA-1 hashing process + */ +typedef struct { + uint32_t h[5]; + uint64_t length; +} sha1_ctx_t; + +/** \typedef sha1_hash_t + * \brief hash value type + * A variable of this type may hold a SHA-1 hash value + */ +/* +typedef uint8_t sha1_hash_t[SHA1_HASH_BITS/8]; +*/ + +/** \fn sha1_init(sha1_ctx_t *state) + * \brief initializes a SHA-1 context + * This function sets a ::sha1_ctx_t variable to the initialization vector + * for SHA-1 hashing. + * \param state pointer to the SHA-1 context variable + */ +void sha1_init(sha1_ctx_t *state); + +/** \fn sha1_nextBlock(sha1_ctx_t *state, const void* block) + * \brief process one input block + * This function processes one input block and updates the hash context + * accordingly + * \param state pointer to the state variable to update + * \param block pointer to the message block to process + */ +void sha1_nextBlock (sha1_ctx_t *state, const void* block); + +/** \fn sha1_lastBlock(sha1_ctx_t *state, const void* block, uint16_t length_b) + * \brief processes the given block and finalizes the context + * This function processes the last block in a SHA-1 hashing process. + * The block should have a maximum length of a single input block. + * \param state pointer to the state variable to update and finalize + * \param block pointer to themessage block to process + * \param length_b length of the message block in bits + */ +void sha1_lastBlock (sha1_ctx_t *state, const void* block, uint16_t length_b); + +/** \fn sha1_ctx2hash(sha1_hash_t *dest, sha1_ctx_t *state) + * \brief convert a state variable into an actual hash value + * Writes the hash value corresponding to the state to the memory pointed by dest. + * \param dest pointer to the hash value destination + * \param state pointer to the hash context + */ +void sha1_ctx2hash (void *dest, sha1_ctx_t *state); + +/** \fn sha1(sha1_hash_t *dest, const void* msg, uint32_t length_b) + * \brief hashing a message which in located entirely in RAM + * This function automatically hashes a message which is entirely in RAM with + * the SHA-1 hashing algorithm. + * \param dest pointer to the hash value destination + * \param msg pointer to the message which should be hashed + * \param length_b length of the message in bits + */ +void sha1(void *dest, const void* msg, uint32_t length_b); + + + +#endif /*SHA1_H_*/ diff -r 000000000000 -r 8705acff2494 simple_ds18b20.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/simple_ds18b20.c Sat Jun 01 01:38:42 2013 +0800 @@ -0,0 +1,192 @@ +// Matt Johnston 2012 +// Based on ds18x20.c by Martin Thomas, in turn based on code by +// Peter // Dannegger and others. +// +#include +#include + +#include "ds18x20.h" +#include "onewire.h" +#include "crc8.h" + +#include "simple_ds18b20.h" + +uint8_t +simple_ds18b20_start_meas(uint8_t id[]) +{ + uint8_t ret; + + ow_reset(); + if( ow_input_pin_state() ) { // only send if bus is "idle" = high + ow_command_with_parasite_enable(DS18X20_CONVERT_T, id); + ret = DS18X20_OK; + } + else { + ret = DS18X20_START_FAIL; + } + + return ret; +} + +static uint8_t +read_scratchpad( uint8_t id[], uint8_t sp[], uint8_t n ) +{ + uint8_t i; + uint8_t ret; + + ow_command( DS18X20_READ, id ); + for ( i = 0; i < n; i++ ) { + sp[i] = ow_byte_rd(); + } + if ( crc8( &sp[0], DS18X20_SP_SIZE ) ) { + ret = DS18X20_ERROR_CRC; + } else { + ret = DS18X20_OK; + } + + return ret; +} + +int16_t +ds18b20_raw16_to_decicelsius(uint16_t measure) +{ + uint8_t negative; + int16_t decicelsius; + uint16_t fract; + + // check for negative + if ( measure & 0x8000 ) { + negative = 1; // mark negative + measure ^= 0xffff; // convert to positive => (twos complement)++ + measure++; + } + else { + negative = 0; + } + + decicelsius = (measure >> 4); + decicelsius *= 10; + + // decicelsius += ((measure & 0x000F) * 640 + 512) / 1024; + // 625/1000 = 640/1024 + fract = ( measure & 0x000F ) * 640; + if ( !negative ) { + fract += 512; + } + fract /= 1024; + decicelsius += fract; + + if ( negative ) { + decicelsius = -decicelsius; + } + + if ( decicelsius == 850 || decicelsius < -550 || decicelsius > 1250 ) { + return DS18X20_INVALID_DECICELSIUS; + } else { + return decicelsius; + } +} + +uint8_t +simple_ds18b20_read_decicelsius( uint8_t id[], int16_t *decicelsius ) +{ + uint16_t reading; + uint8_t ret; + + ret = simple_ds18b20_read_raw(id, &reading); + if (ret == DS18X20_OK) + { + *decicelsius = ds18b20_raw16_to_decicelsius(reading); + } + return ret; +} + +uint8_t +simple_ds18b20_read_raw( uint8_t id[], uint16_t *reading ) +{ + uint8_t sp[DS18X20_SP_SIZE]; + uint8_t ret; + + if (id) + { + ow_reset(); + } + ret = read_scratchpad( id, sp, DS18X20_SP_SIZE ); + if ( ret == DS18X20_OK ) { + *reading = sp[0] | (sp[1] << 8); + } + return ret; +} + +static void +printhex_nibble(const unsigned char b, FILE *stream) +{ + unsigned char c = b & 0x0f; + if ( c > 9 ) { + c += 'A'-10; + } + else { + c += '0'; + } + fputc(c, stream); +} + +void +printhex_byte(const unsigned char b, FILE *stream) +{ + printhex_nibble( b >> 4, stream); + printhex_nibble( b, stream); +} + +void +printhex(uint8_t *id, uint8_t n, FILE *stream) +{ + for (uint8_t i = 0; i < n; i++) + { + if (i > 0) + { + fputc(' ', stream); + } + printhex_byte(id[i], stream); + } +} + + +uint8_t +simple_ds18b20_read_all() +{ + uint8_t id[OW_ROMCODE_SIZE]; + for( uint8_t diff = OW_SEARCH_FIRST; diff != OW_LAST_DEVICE; ) + { + diff = ow_rom_search( diff, &id[0] ); + + if( diff == OW_PRESENCE_ERR ) { + printf_P( PSTR("No Sensor found\r") ); + return OW_PRESENCE_ERR; // <--- early exit! + } + + if( diff == OW_DATA_ERR ) { + printf_P( PSTR("Bus Error\r") ); + return OW_DATA_ERR; // <--- early exit! + } + + int16_t decicelsius; + uint8_t ret = simple_ds18b20_read_decicelsius(NULL, &decicelsius); + if (ret != DS18X20_OK) + { + printf_P(PSTR("Failed reading\r")); + return OW_DATA_ERR; + } + + printf_P(PSTR("DS18B20 %d: "), diff); + if (crc8(id, OW_ROMCODE_SIZE)) + { + printf_P(PSTR("CRC fail")); + } + printhex(id, OW_ROMCODE_SIZE, stdout); + printf_P(PSTR(" %d.%d ÂºC\n"), decicelsius/10, decicelsius % 10); + } + printf_P(PSTR("Done sensors\n")); + return DS18X20_OK; +} + diff -r 000000000000 -r 8705acff2494 simple_ds18b20.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/simple_ds18b20.h Sat Jun 01 01:38:42 2013 +0800 @@ -0,0 +1,16 @@ +#ifndef SIMPLE_DS18B20_H_ +#define SIMPLE_DS18B20_H_ +#include +#include + +#include "ds18x20.h" + +uint8_t simple_ds18b20_start_meas(uint8_t id[]); +void printhex(uint8_t *id, uint8_t n, FILE *stream); +void printhex_byte( const unsigned char b, FILE *stream ); +uint8_t simple_ds18b20_read_decicelsius( uint8_t id[], int16_t *decicelsius ); +int16_t ds18b20_raw16_to_decicelsius(uint16_t measure); +uint8_t simple_ds18b20_read_raw( uint8_t id[], uint16_t *reading ); +uint8_t simple_ds18b20_read_all(); + +#endif // SIMPLE_DS18B20_H_