Mercurial > templog
annotate main.c @ 334:3b821541657d
hmac
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Tue, 12 Jun 2012 00:35:23 +0800 |
| parents | 298e502fdcd4 |
| children | e18d7e89c17d |
| rev | line source |
|---|---|
| 306 | 1 /* Name: main.c |
| 2 * Author: <insert your name here> | |
| 3 * Copyright: <insert your copyright message here> | |
| 4 * License: <insert your license reference here> | |
| 5 */ | |
| 6 | |
| 7 #include <stdio.h> | |
| 8 #include <string.h> | |
| 319 | 9 #include <stddef.h> |
| 307 | 10 #include <avr/io.h> |
| 11 #include <avr/interrupt.h> | |
| 12 #include <avr/sleep.h> | |
| 313 | 13 #include <util/delay.h> |
| 312 | 14 #include <avr/pgmspace.h> |
| 319 | 15 #include <avr/eeprom.h> |
| 306 | 16 #include <util/crc16.h> |
| 17 | |
| 318 | 18 // for DWORD of get_fattime() |
| 309 | 19 #include "integer.h" |
| 318 | 20 |
| 21 #include "simple_ds18b20.h" | |
| 319 | 22 #include "onewire.h" |
| 309 | 23 |
| 306 | 24 // configuration params |
| 25 // - measurement interval | |
| 26 // - transmit interval | |
| 27 // - bluetooth params | |
| 28 // - number of sensors (and range?) | |
| 29 | |
| 307 | 30 // 1 second. we have 1024 prescaler, 32768 crystal. |
| 308 | 31 #define SLEEP_COMPARE 32 |
| 320 | 32 #define MEASURE_WAKE 10 |
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33 |
| 319 | 34 #define VALUE_NOSENSOR -9000 |
| 35 #define VALUE_BROKEN -8000 | |
| 36 | |
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37 // limited to uint16_t for now |
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38 #define COMMS_WAKE 3600 |
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39 #define WAKE_SECS 250 // XXX testing |
| 308 | 40 |
| 316 | 41 #define BAUD 19200 |
| 313 | 42 #define UBRR ((F_CPU)/8/(BAUD)-1) |
| 43 | |
| 44 #define PORT_LED PORTC | |
| 45 #define DDR_LED DDRC | |
| 46 #define PIN_LED PC4 | |
| 307 | 47 |
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48 #define PORT_SHDN PORTD |
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49 #define DDR_SHDN DDRD |
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50 #define PIN_SHDN PD7 |
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51 |
| 319 | 52 #define NUM_MEASUREMENTS 100 |
| 53 #define MAX_SENSORS 5 | |
| 312 | 54 |
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55 // fixed at 8, have a shorter name |
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56 #define ID_LEN OW_ROMCODE_SIZE |
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57 |
| 316 | 58 int uart_putchar(char c, FILE *stream); |
| 320 | 59 static void long_delay(int ms); |
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60 static void blink(); |
| 320 | 61 |
| 306 | 62 static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL, |
| 63 _FDEV_SETUP_WRITE); | |
| 64 | |
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65 uint16_t crc_out; |
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66 static FILE _crc_stdout = FDEV_SETUP_STREAM(uart_putchar, NULL, |
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67 _FDEV_SETUP_WRITE); |
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68 // convenience |
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69 static FILE *crc_stdout = &_crc_stdout; |
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70 |
| 323 | 71 static uint16_t n_measurements; |
| 319 | 72 // stored as decidegrees |
| 320 | 73 static int16_t measurements[NUM_MEASUREMENTS][MAX_SENSORS]; |
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74 static uint32_t first_measurement_clock; |
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75 // last_measurement_clock is redundant but checks that we're not missing |
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76 // samples |
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77 static uint32_t last_measurement_clock; |
| 306 | 78 |
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79 // boolean flags |
| 323 | 80 static uint8_t need_measurement; |
| 81 static uint8_t need_comms; | |
| 307 | 82 |
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83 // counts down from WAKE_SECS to 0, goes to deep sleep when hits 0 |
| 323 | 84 static uint8_t comms_timeout; |
| 307 | 85 |
| 323 | 86 static uint8_t readpos; |
| 306 | 87 static char readbuf[30]; |
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88 static uint8_t have_cmd; |
| 306 | 89 |
| 323 | 90 static uint8_t measure_count; |
| 91 static uint16_t comms_count; | |
| 92 | |
| 93 static uint32_t clock_epoch; | |
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94 |
| 319 | 95 // thanks to http://projectgus.com/2010/07/eeprom-access-with-arduino/ |
| 96 #define eeprom_read_to(dst_p, eeprom_field, dst_size) eeprom_read_block((dst_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (dst_size)) | |
| 97 #define eeprom_read(dst, eeprom_field) eeprom_read_to((&dst), eeprom_field, sizeof(dst)) | |
| 98 #define eeprom_write_from(src_p, eeprom_field, src_size) eeprom_write_block((src_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (src_size)) | |
| 99 #define eeprom_write(src, eeprom_field) { eeprom_write_from(&src, eeprom_field, sizeof(src)); } | |
| 100 | |
| 101 #define EXPECT_MAGIC 0x67c9 | |
| 102 | |
| 103 struct __attribute__ ((__packed__)) __eeprom_data { | |
| 104 uint16_t magic; | |
| 105 uint8_t n_sensors; | |
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106 uint8_t sensor_id[MAX_SENSORS][ID_LEN]; |
| 319 | 107 }; |
| 108 | |
| 314 | 109 #define DEBUG(str) printf_P(PSTR(str)) |
| 110 | |
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111 static void deep_sleep(); |
| 307 | 112 |
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113 // Very first setup |
| 324 | 114 static void |
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115 setup_chip() |
| 324 | 116 { |
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117 // Set clock to 2mhz |
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118 cli(); |
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119 CLKPR = _BV(CLKPCE); |
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120 // divide by 4 |
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121 CLKPR = _BV(CLKPS1); |
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122 sei(); |
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123 |
| 325 | 124 // 3.3v power for bluetooth and SD |
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125 DDR_LED |= _BV(PIN_LED); |
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126 DDR_SHDN |= _BV(PIN_SHDN); |
| 325 | 127 |
| 324 | 128 // INT0 setup |
| 129 EIMSK = _BV(INT0); | |
| 130 // set pullup | |
| 131 PORTD |= _BV(PD2); | |
| 132 } | |
| 133 | |
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134 static void |
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135 set_aux_power(uint8_t on) |
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136 { |
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137 if (on) |
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138 { |
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139 PORT_SHDN &= ~_BV(PIN_SHDN); |
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140 } |
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141 else |
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142 { |
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143 //PORT_SHDN |= _BV(PIN_SHDN); |
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144 } |
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145 } |
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146 |
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147 static void |
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148 setup_tick_counter() |
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149 { |
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150 // set up counter2. |
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151 // COM21 COM20 Set OC2 on Compare Match (p116) |
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152 // WGM21 Clear counter on compare |
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153 //TCCR2A = _BV(COM2A1) | _BV(COM2A0) | _BV(WGM21); |
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154 // toggle on match |
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155 TCCR2A = _BV(COM2A0); |
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156 // CS22 CS21 CS20 clk/1024 |
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157 TCCR2B = _BV(CS22) | _BV(CS21) | _BV(CS20); |
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158 // set async mode |
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159 ASSR |= _BV(AS2); |
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160 TCNT2 = 0; |
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161 OCR2A = SLEEP_COMPARE; |
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162 // interrupt |
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163 TIMSK2 = _BV(OCIE2A); |
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164 } |
| 324 | 165 |
| 306 | 166 static void |
| 313 | 167 uart_on() |
| 306 | 168 { |
| 314 | 169 // Power reduction register |
| 170 //PRR &= ~_BV(PRUSART0); | |
| 171 | |
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172 // All of this needs to be done each time after turning off the PRR |
| 306 | 173 // baud rate |
| 313 | 174 UBRR0H = (unsigned char)(UBRR >> 8); |
| 175 UBRR0L = (unsigned char)UBRR; | |
| 176 // set 2x clock, improves accuracy of UBRR | |
| 177 UCSR0A |= _BV(U2X0); | |
| 312 | 178 UCSR0B = _BV(RXCIE0) | _BV(RXEN0) | _BV(TXEN0); |
| 306 | 179 //8N1 |
| 313 | 180 UCSR0C = _BV(UCSZ01) | _BV(UCSZ00); |
| 312 | 181 } |
| 182 | |
| 183 static void | |
| 184 uart_off() | |
| 185 { | |
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186 #if 0 |
| 312 | 187 // Turn of interrupts and disable tx/rx |
| 188 UCSR0B = 0; | |
| 189 | |
| 190 // Power reduction register | |
| 314 | 191 //PRR |= _BV(PRUSART0); |
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192 #endif |
| 306 | 193 } |
| 194 | |
| 316 | 195 int |
| 306 | 196 uart_putchar(char c, FILE *stream) |
| 197 { | |
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198 // XXX could perhaps sleep in the loop for power. |
| 314 | 199 if (c == '\n') |
| 200 { | |
| 316 | 201 loop_until_bit_is_set(UCSR0A, UDRE0); |
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202 UDR0 = '\r'; |
| 314 | 203 } |
| 308 | 204 loop_until_bit_is_set(UCSR0A, UDRE0); |
| 205 UDR0 = c; | |
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206 if (stream == crc_stdout) |
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207 { |
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208 crc_out = _crc_ccitt_update(crc_out, c); |
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209 } |
| 316 | 210 if (c == '\r') |
| 211 { | |
| 212 loop_until_bit_is_set(UCSR0A, UDRE0); | |
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213 UDR0 = '\n'; |
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214 if (stream == crc_stdout) |
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215 { |
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216 crc_out = _crc_ccitt_update(crc_out, '\n'); |
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217 } |
| 316 | 218 } |
| 306 | 219 return 0; |
| 220 } | |
| 221 | |
| 222 static void | |
| 223 cmd_fetch() | |
| 224 { | |
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225 crc_out = 0; |
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226 uint8_t n_sensors; |
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227 eeprom_read(n_sensors, n_sensors); |
| 319 | 228 |
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229 fprintf_P(crc_stdout, PSTR("START\n")); |
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230 fprintf_P(crc_stdout, PSTR("now=%lu\n" |
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231 "time_step=%lu\n" |
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232 "first_time=%lu\n" |
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233 "last_time=%lu\n"), |
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234 clock_epoch, |
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235 MEASURE_WAKE, |
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236 first_measurement_clock, |
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237 last_measurement_clock); |
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238 fprintf_P(crc_stdout, PSTR("sensors=%u\n"), n_sensors); |
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239 for (uint8_t s = 0; s < n_sensors; s++) |
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240 { |
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241 uint8_t id[ID_LEN]; |
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242 fprintf_P(crc_stdout, PSTR("sensor_id%u="), s); |
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243 eeprom_read_to(id, sensor_id[s], ID_LEN); |
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244 printhex(id, ID_LEN, crc_stdout); |
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245 fputc('\n', crc_stdout); |
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246 } |
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247 fprintf_P(crc_stdout, PSTR("measurements=%u\n"), n_measurements); |
| 320 | 248 for (uint16_t n = 0; n < n_measurements; n++) |
| 306 | 249 { |
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250 fprintf_P(crc_stdout, PSTR("meas%u="), n); |
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251 for (uint8_t s = 0; s < n_sensors; s++) |
| 319 | 252 { |
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253 fprintf_P(crc_stdout, PSTR(" %u"), measurements[n][s]); |
| 319 | 254 } |
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255 fputc('\n', crc_stdout); |
| 306 | 256 } |
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257 fprintf_P(crc_stdout, PSTR("END\n")); |
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258 fprintf_P(stdout, PSTR("CRC=%hu\n"), crc_out); |
| 306 | 259 } |
| 260 | |
| 261 static void | |
| 262 cmd_clear() | |
| 263 { | |
| 313 | 264 n_measurements = 0; |
| 265 printf_P(PSTR("Cleared\n")); | |
| 306 | 266 } |
| 267 | |
| 268 static void | |
| 269 cmd_btoff() | |
| 270 { | |
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271 uint16_t next_wake = COMMS_WAKE - comms_count; |
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272 printf_P(PSTR("off:%d\n"), next_wake); |
| 313 | 273 _delay_ms(50); |
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274 comms_timeout = 0; |
| 306 | 275 } |
| 276 | |
| 277 static void | |
| 318 | 278 cmd_measure() |
| 279 { | |
| 280 printf_P(PSTR("Measuring\n")); | |
| 281 need_measurement = 1; | |
| 282 } | |
| 283 | |
| 284 static void | |
| 285 cmd_sensors() | |
| 286 { | |
| 287 uint8_t ret = simple_ds18b20_start_meas(NULL); | |
| 320 | 288 printf_P(PSTR("All sensors, ret %d, waiting...\n"), ret); |
| 289 long_delay(DS18B20_TCONV_12BIT); | |
| 318 | 290 simple_ds18b20_read_all(); |
| 291 } | |
| 292 | |
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293 #if 0 |
| 319 | 294 // 0 on success |
| 295 static uint8_t | |
| 296 get_hex_string(const char *hex, uint8_t *out, uint8_t size) | |
| 297 { | |
| 298 uint8_t upper; | |
| 299 uint8_t o; | |
| 300 for (uint8_t i = 0, z = 0; o < size; i++) | |
| 301 { | |
| 302 uint8_t h = hex[i]; | |
| 303 if (h >= 'A' && h <= 'F') | |
| 304 { | |
| 305 // lower case | |
| 306 h += 0x20; | |
| 307 } | |
| 308 uint8_t nibble; | |
| 309 if (h >= '0' && h <= '9') | |
| 310 { | |
| 311 nibble = h - '0'; | |
| 312 } | |
| 313 else if (h >= 'a' && h <= 'f') | |
| 314 { | |
| 315 nibble = 10 + h - 'a'; | |
| 316 } | |
| 317 else if (h == ' ' || h == ':') | |
| 318 { | |
| 319 continue; | |
| 320 } | |
| 321 else | |
| 322 { | |
| 323 printf_P(PSTR("Bad hex 0x%x '%c'\n"), hex[i], hex[i]); | |
| 324 return 1; | |
| 325 } | |
| 326 | |
| 327 if (z % 2 == 0) | |
| 328 { | |
| 329 upper = nibble << 4; | |
| 330 } | |
| 331 else | |
| 332 { | |
| 333 out[o] = upper | nibble; | |
| 334 o++; | |
| 335 } | |
| 336 | |
| 337 z++; | |
| 338 } | |
| 339 | |
| 340 if (o != size) | |
| 341 { | |
| 342 printf_P(PSTR("Short hex\n")); | |
| 343 return 1; | |
| 344 } | |
| 345 return 0; | |
| 346 } | |
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347 #endif |
| 319 | 348 |
| 349 static void | |
| 350 add_sensor(uint8_t *id) | |
| 351 { | |
| 352 uint8_t n; | |
| 353 eeprom_read(n, n_sensors); | |
| 354 if (n < MAX_SENSORS) | |
| 355 { | |
| 356 cli(); | |
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357 eeprom_write_from(id, sensor_id[n], ID_LEN); |
| 319 | 358 n++; |
| 359 eeprom_write(n, n_sensors); | |
| 360 sei(); | |
| 361 printf_P(PSTR("Added sensor %d : "), n); | |
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362 printhex(id, ID_LEN, stdout); |
| 319 | 363 putchar('\n'); |
| 364 } | |
| 365 else | |
| 366 { | |
| 367 printf_P(PSTR("Too many sensors\n")); | |
| 368 } | |
| 369 } | |
| 370 | |
| 371 static void | |
| 372 cmd_add_all() | |
| 373 { | |
| 374 uint8_t id[OW_ROMCODE_SIZE]; | |
| 375 printf_P("Adding all\n"); | |
| 376 ow_reset(); | |
| 377 for( uint8_t diff = OW_SEARCH_FIRST; diff != OW_LAST_DEVICE; ) | |
| 378 { | |
| 379 diff = ow_rom_search( diff, &id[0] ); | |
| 380 if( diff == OW_PRESENCE_ERR ) { | |
| 381 printf_P( PSTR("No Sensor found\r") ); | |
| 382 return; | |
| 383 } | |
| 384 | |
| 385 if( diff == OW_DATA_ERR ) { | |
| 386 printf_P( PSTR("Bus Error\r") ); | |
| 387 return; | |
| 388 } | |
| 389 add_sensor(id); | |
| 390 } | |
| 391 } | |
| 392 | |
| 393 static void | |
| 394 cmd_init() | |
| 395 { | |
| 396 printf_P(PSTR("Resetting sensor list\n")); | |
| 397 uint8_t zero = 0; | |
| 398 cli(); | |
| 399 eeprom_write(zero, n_sensors); | |
| 400 sei(); | |
| 401 printf_P(PSTR("Done.\n")); | |
| 402 } | |
| 403 | |
| 404 static void | |
| 405 check_first_startup() | |
| 406 { | |
| 407 uint16_t magic; | |
| 408 eeprom_read(magic, magic); | |
| 409 if (magic != EXPECT_MAGIC) | |
| 410 { | |
| 411 printf_P(PSTR("First boot, looking for sensors...\n")); | |
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412 // in case of power fumbles don't want to reset during eeprom write, |
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413 long_delay(2); |
| 319 | 414 cmd_init(); |
| 415 cmd_add_all(); | |
| 320 | 416 cli(); |
| 417 magic = EXPECT_MAGIC; | |
| 418 eeprom_write(magic, magic); | |
| 419 sei(); | |
| 319 | 420 } |
| 421 } | |
| 422 | |
| 318 | 423 static void |
| 306 | 424 read_handler() |
| 425 { | |
| 312 | 426 if (strcmp_P(readbuf, PSTR("fetch")) == 0) |
| 306 | 427 { |
| 428 cmd_fetch(); | |
| 429 } | |
| 312 | 430 else if (strcmp_P(readbuf, PSTR("clear")) == 0) |
| 306 | 431 { |
| 432 cmd_clear(); | |
| 433 } | |
| 312 | 434 else if (strcmp_P(readbuf, PSTR("btoff")) == 0) |
| 306 | 435 { |
| 436 cmd_btoff(); | |
| 437 } | |
| 318 | 438 else if (strcmp_P(readbuf, PSTR("measure")) == 0) |
| 439 { | |
| 440 cmd_measure(); | |
| 441 } | |
| 442 else if (strcmp_P(readbuf, PSTR("sensors")) == 0) | |
| 443 { | |
| 444 cmd_sensors(); | |
| 445 } | |
| 319 | 446 else if (strcmp_P(readbuf, PSTR("addall"))== 0) |
| 447 { | |
| 448 cmd_add_all(); | |
| 449 } | |
| 450 else if (strcmp_P(readbuf, PSTR("init")) == 0) | |
| 451 { | |
| 452 cmd_init(); | |
| 453 } | |
| 306 | 454 else |
| 455 { | |
| 312 | 456 printf_P(PSTR("Bad command\n")); |
| 306 | 457 } |
| 458 } | |
| 459 | |
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460 ISR(INT0_vect) |
| 324 | 461 { |
| 462 need_comms = 1; | |
|
330
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463 blink(); |
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464 _delay_ms(100); |
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465 blink(); |
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466 _delay_ms(100); |
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467 blink(); |
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468 _delay_ms(100); |
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469 blink(); |
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470 _delay_ms(100); |
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471 blink(); |
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472 _delay_ms(100); |
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473 blink(); |
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474 _delay_ms(100); |
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475 blink(); |
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476 _delay_ms(100); |
| 324 | 477 } |
| 478 | |
| 479 | |
| 308 | 480 ISR(USART_RX_vect) |
| 306 | 481 { |
| 308 | 482 char c = UDR0; |
| 318 | 483 uart_putchar(c, NULL); |
|
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484 if (c == '\r' || c == '\n') |
| 306 | 485 { |
|
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486 if (readpos > 0) |
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487 { |
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488 readbuf[readpos] = '\0'; |
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489 have_cmd = 1; |
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490 readpos = 0; |
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491 } |
| 306 | 492 } |
| 493 else | |
| 494 { | |
| 495 readbuf[readpos] = c; | |
| 496 readpos++; | |
| 497 if (readpos >= sizeof(readbuf)) | |
| 498 { | |
| 499 readpos = 0; | |
| 500 } | |
| 501 } | |
| 502 } | |
| 503 | |
| 308 | 504 ISR(TIMER2_COMPA_vect) |
| 307 | 505 { |
| 320 | 506 TCNT2 = 0; |
|
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507 measure_count ++; |
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508 comms_count ++; |
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509 |
| 323 | 510 clock_epoch ++; |
| 511 | |
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512 if (comms_timeout != 0) |
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513 { |
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514 comms_timeout--; |
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515 } |
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516 |
| 320 | 517 if (measure_count >= MEASURE_WAKE) |
| 307 | 518 { |
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519 measure_count = 0; |
| 307 | 520 need_measurement = 1; |
| 521 } | |
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522 |
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523 if (comms_count >= COMMS_WAKE) |
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524 { |
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525 comms_count = 0; |
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526 need_comms = 1; |
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527 } |
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528 |
| 307 | 529 } |
| 530 | |
| 309 | 531 DWORD get_fattime (void) |
| 532 { | |
| 533 return 0; | |
| 534 } | |
| 535 | |
| 307 | 536 static void |
| 537 deep_sleep() | |
| 538 { | |
| 539 // p119 of manual | |
| 308 | 540 OCR2A = SLEEP_COMPARE; |
| 541 loop_until_bit_is_clear(ASSR, OCR2AUB); | |
| 307 | 542 |
| 543 set_sleep_mode(SLEEP_MODE_PWR_SAVE); | |
| 544 sleep_mode(); | |
| 545 } | |
| 546 | |
| 547 static void | |
|
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548 idle_sleep() |
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549 { |
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550 set_sleep_mode(SLEEP_MODE_IDLE); |
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551 sleep_mode(); |
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552 } |
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553 |
| 320 | 554 #if 0 |
| 555 // untested | |
| 312 | 556 static void |
| 557 do_adc_335() | |
| 558 { | |
| 314 | 559 //PRR &= ~_BV(PRADC); |
| 312 | 560 |
| 561 ADMUX = _BV(ADLAR); | |
| 562 | |
| 563 // ADPS2 = /16 prescaler, 62khz at 1mhz clock | |
| 564 ADCSRA = _BV(ADEN) | _BV(ADPS2); | |
| 565 | |
| 566 // measure value | |
| 567 ADCSRA |= _BV(ADSC); | |
| 568 loop_until_bit_is_clear(ADCSRA, ADSC); | |
| 569 uint8_t low = ADCL; | |
| 570 uint8_t high = ADCH; | |
| 571 uint16_t f_measure = low + (high << 8); | |
| 572 | |
| 573 // set to measure 1.1 reference | |
| 574 ADMUX = _BV(ADLAR) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1); | |
| 575 ADCSRA |= _BV(ADSC); | |
| 576 loop_until_bit_is_clear(ADCSRA, ADSC); | |
| 577 uint8_t low_11 = ADCL; | |
| 578 uint8_t high_11 = ADCH; | |
| 579 uint16_t f_11 = low_11 + (high_11 << 8); | |
| 580 | |
| 581 float res_volts = 1.1 * f_measure / f_11; | |
| 582 | |
| 583 // 10mV/degree | |
| 584 // scale to 1/5 degree units above 0C | |
| 585 int temp = (res_volts - 2.73) * 500; | |
| 319 | 586 // XXX fixme |
| 587 //measurements[n_measurements] = temp; | |
| 312 | 588 // XXX something if it hits the limit |
| 589 | |
| 590 // measure AVR internal temperature against 1.1 ref. | |
| 591 ADMUX = _BV(ADLAR) | _BV(MUX3) | _BV(REFS1) | _BV(REFS0); | |
| 592 ADCSRA |= _BV(ADSC); | |
| 593 loop_until_bit_is_clear(ADCSRA, ADSC); | |
| 594 uint16_t res_internal = ADCL; | |
| 595 res_internal |= ADCH << 8; | |
| 596 | |
| 597 float internal_volts = res_internal * (1.1 / 1024.0); | |
| 598 | |
| 599 // 1mV/degree | |
| 600 int internal_temp = (internal_volts - 2.73) * 5000; | |
| 319 | 601 // XXX fixme |
| 602 //internal_measurements[n_measurements] = internal_temp; | |
| 312 | 603 |
| 604 printf_P("measure %d: external %d, internal %d, 1.1 %d\n", | |
| 605 n_measurements, temp, internal_temp, f_11); | |
| 606 | |
| 607 n_measurements++; | |
| 314 | 608 //PRR |= _BV(PRADC); |
| 312 | 609 } |
| 320 | 610 #endif |
| 312 | 611 |
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612 static void |
| 307 | 613 do_measurement() |
| 614 { | |
| 319 | 615 uint8_t n_sensors; |
| 320 | 616 printf("do_measurement\n"); |
| 319 | 617 eeprom_read(n_sensors, n_sensors); |
| 320 | 618 printf("do_measurement sensors %d\n", n_sensors); |
| 319 | 619 |
| 620 uint8_t ret = simple_ds18b20_start_meas(NULL); | |
| 320 | 621 printf_P(PSTR("Read all sensors, ret %d, waiting...\n"), ret); |
| 319 | 622 _delay_ms(DS18B20_TCONV_12BIT); |
| 623 | |
| 624 if (n_measurements == NUM_MEASUREMENTS) | |
| 625 { | |
| 320 | 626 printf_P(PSTR("Measurements .overflow\n")); |
| 319 | 627 n_measurements = 0; |
| 628 } | |
| 312 | 629 |
| 320 | 630 for (uint8_t s = 0; s < MAX_SENSORS; s++) |
| 319 | 631 { |
| 632 int16_t decicelsius; | |
| 320 | 633 if (s >= n_sensors) |
| 319 | 634 { |
| 635 decicelsius = VALUE_NOSENSOR; | |
| 636 } | |
| 637 else | |
| 638 { | |
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639 uint8_t id[ID_LEN]; |
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640 eeprom_read_to(id, sensor_id[s], ID_LEN); |
| 319 | 641 |
| 642 uint8_t ret = simple_ds18b20_read_decicelsius(id, &decicelsius); | |
| 643 if (ret != DS18X20_OK) | |
| 644 { | |
| 645 decicelsius = VALUE_BROKEN; | |
| 646 } | |
| 647 } | |
| 320 | 648 measurements[n_measurements][s] = decicelsius; |
| 319 | 649 } |
|
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650 |
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651 if (n_measurements == 0) |
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652 { |
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653 first_measurement_clock = clock_epoch; |
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654 } |
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655 last_measurement_clock = clock_epoch; |
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656 |
| 320 | 657 n_measurements++; |
| 318 | 658 //do_adc_335(); |
| 307 | 659 } |
| 660 | |
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661 static void |
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662 do_comms() |
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663 { |
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664 // turn on bluetooth |
|
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665 set_aux_power(1); |
| 313 | 666 uart_on(); |
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667 |
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668 // write sd card here? same 3.3v regulator... |
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669 |
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670 for (comms_timeout = WAKE_SECS; comms_timeout > 0; ) |
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671 { |
| 312 | 672 if (need_measurement) |
| 673 { | |
| 320 | 674 need_measurement = 0; |
| 312 | 675 do_measurement(); |
| 676 } | |
| 677 | |
|
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678 if (have_cmd) |
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679 { |
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680 have_cmd = 0; |
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681 read_handler(); |
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682 } |
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683 |
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684 // wait for commands from the master |
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685 idle_sleep(); |
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686 } |
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687 |
| 312 | 688 uart_off(); |
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689 set_aux_power(0); |
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690 } |
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691 |
| 313 | 692 static void |
| 693 blink() | |
| 694 { | |
| 695 PORT_LED &= ~_BV(PIN_LED); | |
| 315 | 696 _delay_ms(1); |
| 313 | 697 PORT_LED |= _BV(PIN_LED); |
| 698 } | |
| 699 | |
| 700 static void | |
| 701 long_delay(int ms) | |
| 702 { | |
| 703 int iter = ms / 100; | |
| 704 | |
| 705 for (int i = 0; i < iter; i++) | |
| 706 { | |
| 707 _delay_ms(100); | |
| 708 } | |
| 709 } | |
| 710 | |
| 314 | 711 ISR(BADISR_vect) |
| 712 { | |
| 320 | 713 //uart_on(); |
| 314 | 714 printf_P(PSTR("Bad interrupt\n")); |
| 715 } | |
| 716 | |
| 315 | 717 |
| 306 | 718 int main(void) |
| 719 { | |
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720 setup_chip(); |
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721 blink(); |
| 315 | 722 |
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723 set_aux_power(0); |
| 313 | 724 |
| 312 | 725 stdout = &mystdout; |
| 313 | 726 uart_on(); |
| 727 | |
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728 printf(PSTR("Started.\n")); |
| 319 | 729 |
| 730 check_first_startup(); | |
| 731 | |
| 314 | 732 uart_off(); |
| 306 | 733 |
| 312 | 734 // turn off everything except timer2 |
| 314 | 735 //PRR = _BV(PRTWI) | _BV(PRTIM0) | _BV(PRTIM1) | _BV(PRSPI) | _BV(PRUSART0) | _BV(PRADC); |
| 736 | |
| 737 // for testing | |
| 738 uart_on(); | |
| 739 | |
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740 setup_tick_counter(); |
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741 |
| 318 | 742 sei(); |
| 314 | 743 |
|
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744 need_comms = 1; |
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745 |
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746 #if 0 |
| 312 | 747 for (;;) |
| 748 { | |
| 318 | 749 do_comms(); |
| 312 | 750 } |
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751 #endif |
| 318 | 752 |
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753 for(;;) |
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754 { |
| 307 | 755 if (need_measurement) |
| 756 { | |
| 320 | 757 need_measurement = 0; |
| 307 | 758 do_measurement(); |
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759 continue; |
| 307 | 760 } |
|
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761 |
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762 if (need_comms) |
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763 { |
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764 need_comms = 0; |
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765 do_comms(); |
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766 continue; |
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767 } |
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768 |
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769 deep_sleep(); |
| 315 | 770 blink(); |
| 316 | 771 printf("."); |
| 306 | 772 } |
| 318 | 773 |
| 306 | 774 return 0; /* never reached */ |
| 775 } |