Mercurial > templog
annotate main.c @ 417:b73ea78317dc
a bit more logging. make printf floats work
author | Matt Johnston <matt@ucc.asn.au> |
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date | Sat, 06 Oct 2012 23:53:28 +0800 |
parents | 99ef51dd1f61 |
children | 45c051a7db82 |
rev | line source |
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306 | 1 #include <stdio.h> |
2 #include <string.h> | |
319 | 3 #include <stddef.h> |
415
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4 #include <stdbool.h> |
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5 #include <stdlib.h> |
307 | 6 #include <avr/io.h> |
7 #include <avr/interrupt.h> | |
8 #include <avr/sleep.h> | |
313 | 9 #include <util/delay.h> |
312 | 10 #include <avr/pgmspace.h> |
319 | 11 #include <avr/eeprom.h> |
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12 #include <avr/wdt.h> |
365 | 13 #include <util/atomic.h> |
306 | 14 #include <util/crc16.h> |
15 | |
318 | 16 #include "simple_ds18b20.h" |
319 | 17 #include "onewire.h" |
309 | 18 |
306 | 19 // configuration params |
20 // - measurement interval | |
21 // - transmit interval | |
22 // - bluetooth params | |
23 // - number of sensors (and range?) | |
24 | |
386 | 25 // TICK should be 8 or less (8 untested). all timers need |
26 // to be a multiple. | |
27 | |
28 #define TICK 6 | |
29 // we have 1024 prescaler, 32768 crystal. | |
30 #define SLEEP_COMPARE (32*TICK-1) | |
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31 |
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32 #define VALUE_NOSENSOR 0x07D0 // 125 degrees |
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33 #define VALUE_BROKEN 0x07D1 // 125.0625 |
319 | 34 |
316 | 35 #define BAUD 19200 |
313 | 36 #define UBRR ((F_CPU)/8/(BAUD)-1) |
37 | |
38 #define PORT_LED PORTC | |
39 #define DDR_LED DDRC | |
40 #define PIN_LED PC4 | |
307 | 41 |
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42 #define PORT_SHDN PORTD |
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43 #define DDR_SHDN DDRD |
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44 #define PIN_SHDN PD7 |
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45 |
414 | 46 #define PORT_FRIDGE PORTD |
47 #define DDR_FRIDGE DDRD | |
48 #define PIN_FRIDGE PD6 | |
49 | |
386 | 50 // total amount of 16bit values available for measurements. |
51 // adjust emperically, be sure to allow enough stack space too | |
52 #define TOTAL_MEASUREMENTS 840 | |
53 | |
54 // each sensor slot uses 8 bytes | |
55 #define MAX_SENSORS 6 | |
312 | 56 |
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57 // fixed at 8, have a shorter name |
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58 #define ID_LEN OW_ROMCODE_SIZE |
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59 |
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60 // #define HAVE_UART_ECHO |
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61 |
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62 // stores a value of clock_epoch combined with the remainder of TCNT2, |
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63 // for 1/32 second accuracy |
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64 struct epoch_ticks |
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65 { |
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66 uint32_t ticks; |
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67 // remainder |
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68 uint8_t rem; |
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69 }; |
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70 |
386 | 71 // eeprom-settable parameters. all timeouts should |
72 // be a multiple of TICK (6 seconds probably) | |
414 | 73 static uint16_t measure_wake = 61; // not a divisor of comms_wake |
74 static uint16_t comms_wake = 600; | |
386 | 75 static uint8_t wake_secs = 30; |
414 | 76 // decidegrees |
77 static int16_t fridge_setpoint = 180; // 18.0ºC | |
78 static int16_t fridge_difference = 5; // 0.5ºC | |
79 static uint16_t fridge_delay = 600; // seconds | |
413 | 80 |
365 | 81 // ---- Atomic guards required accessing these variables |
82 static uint32_t clock_epoch; | |
83 static uint16_t comms_count; | |
84 static uint16_t measure_count; | |
85 // ---- End atomic guards required | |
86 | |
323 | 87 static uint16_t n_measurements; |
365 | 88 |
386 | 89 // calculated at startup as TOTAL_MEASUREMENTS/n_sensors |
90 static uint16_t max_measurements; | |
91 | |
92 static uint16_t measurements[TOTAL_MEASUREMENTS]; | |
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93 |
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94 static struct epoch_ticks first_measurement_clock; |
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95 // last_measurement_clock is redundant but checks that we're not missing |
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96 // samples |
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97 static struct epoch_ticks last_measurement_clock; |
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98 static struct epoch_ticks last_comms_clock; |
365 | 99 |
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100 // boolean flags |
323 | 101 static uint8_t need_measurement; |
102 static uint8_t need_comms; | |
346 | 103 static uint8_t uart_enabled; |
386 | 104 static uint8_t stay_awake; |
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105 static uint8_t button_pressed; |
307 | 106 |
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107 // counts down from WAKE_SECS to 0, goes to deep sleep when hits 0 |
323 | 108 static uint8_t comms_timeout; |
307 | 109 |
323 | 110 static uint8_t readpos; |
306 | 111 static char readbuf[30]; |
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112 static uint8_t have_cmd; |
306 | 113 |
386 | 114 static uint8_t n_sensors; |
115 static uint8_t sensor_id[MAX_SENSORS][ID_LEN]; | |
116 | |
414 | 117 static int16_t last_fridge = DS18X20_INVALID_DECICELSIUS; |
118 static int16_t last_wort = DS18X20_INVALID_DECICELSIUS; | |
119 static struct epoch_ticks fridge_off_clock = {0}; | |
386 | 120 |
121 int uart_putchar(char c, FILE *stream); | |
122 static void long_delay(int ms); | |
123 static void blink(); | |
124 static uint16_t adc_vcc(); | |
125 | |
126 static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL, | |
127 _FDEV_SETUP_WRITE); | |
128 | |
129 static uint16_t crc_out; | |
130 static FILE _crc_stdout = FDEV_SETUP_STREAM(uart_putchar, NULL, | |
131 _FDEV_SETUP_WRITE); | |
132 // convenience | |
133 static FILE *crc_stdout = &_crc_stdout; | |
134 | |
310
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135 |
319 | 136 // thanks to http://projectgus.com/2010/07/eeprom-access-with-arduino/ |
137 #define eeprom_read_to(dst_p, eeprom_field, dst_size) eeprom_read_block((dst_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (dst_size)) | |
138 #define eeprom_read(dst, eeprom_field) eeprom_read_to((&dst), eeprom_field, sizeof(dst)) | |
139 #define eeprom_write_from(src_p, eeprom_field, src_size) eeprom_write_block((src_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (src_size)) | |
140 #define eeprom_write(src, eeprom_field) { eeprom_write_from(&src, eeprom_field, sizeof(src)); } | |
141 | |
142 #define EXPECT_MAGIC 0x67c9 | |
143 | |
144 struct __attribute__ ((__packed__)) __eeprom_data { | |
145 uint16_t magic; | |
386 | 146 uint16_t measure_wake; |
147 uint16_t comms_wake; | |
148 uint8_t wake_secs; | |
413 | 149 |
414 | 150 int16_t fridge_setpoint; // decidegrees |
151 uint8_t fridge_difference; // decidegrees | |
152 uint16_t fridge_delay; | |
413 | 153 |
414 | 154 #if 0 |
155 static uint8_t wort_id[ID_LEN]; | |
156 static uint8_t fridge_id[ID_LEN]; | |
157 #endif | |
158 }; | |
413 | 159 |
414 | 160 static const uint8_t fridge_id[ID_LEN] = |
161 {0x28,0xCE,0xB2,0x1A,0x03,0x00,0x00,0x99}; | |
162 static const uint8_t wort_id[ID_LEN] = | |
163 {0x28,0x49,0xBC,0x1A,0x03,0x00,0x00,0x54}; | |
319 | 164 |
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165 static void deep_sleep(); |
307 | 166 |
416 | 167 // 0 or 1 |
168 static uint8_t | |
169 is_fridge_on() | |
170 { | |
171 if (PORT_FRIDGE & _BV(PIN_FRIDGE)) | |
172 { | |
173 return 1; | |
174 } | |
175 else | |
176 { | |
177 return 0; | |
178 } | |
179 } | |
180 | |
322
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181 // Very first setup |
324 | 182 static void |
322
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183 setup_chip() |
324 | 184 { |
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185 cli(); |
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186 |
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187 // stop watchdog timer (might have been used to cause a reset) |
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188 wdt_reset(); |
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189 MCUSR &= ~_BV(WDRF); |
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190 WDTCSR |= _BV(WDCE) | _BV(WDE); |
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191 WDTCSR = 0; |
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192 |
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193 // Set clock to 2mhz |
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194 CLKPR = _BV(CLKPCE); |
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195 // divide by 4 |
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196 CLKPR = _BV(CLKPS1); |
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197 |
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198 // enable pullups |
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199 PORTB = 0xff; // XXX change when using SPI |
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200 PORTD = 0xff; |
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201 PORTC = 0xff; |
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202 |
325 | 203 // 3.3v power for bluetooth and SD |
322
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204 DDR_LED |= _BV(PIN_LED); |
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205 DDR_SHDN |= _BV(PIN_SHDN); |
325 | 206 |
414 | 207 DDR_FRIDGE |= _BV(PIN_FRIDGE); |
417
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208 PORT_FRIDGE &= ~_BV(PIN_FRIDGE); |
414 | 209 |
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210 // set pullup |
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211 PORTD |= _BV(PD2); |
347 | 212 // INT0 setup |
358
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213 EICRA = (1<<ISC01); // falling edge - data sheet says it won't work? |
347 | 214 EIMSK = _BV(INT0); |
358
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215 |
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216 // comparator disable |
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217 ACSR = _BV(ACD); |
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218 |
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219 // disable adc pin input buffers |
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220 DIDR0 = 0x3F; // acd0-adc5 |
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221 DIDR1 = (1<<AIN1D)|(1<<AIN0D); // ain0/ain1 |
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222 |
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223 sei(); |
324 | 224 } |
225 | |
322
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226 static void |
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227 set_aux_power(uint8_t on) |
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228 { |
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229 if (on) |
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230 { |
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231 PORT_SHDN &= ~_BV(PIN_SHDN); |
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232 } |
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233 else |
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234 { |
349 | 235 PORT_SHDN |= _BV(PIN_SHDN); |
322
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236 } |
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237 } |
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238 |
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239 static void |
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240 get_epoch_ticks(struct epoch_ticks *t) |
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241 { |
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242 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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243 { |
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244 t->ticks = clock_epoch; |
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245 t->rem = TCNT2; |
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246 } |
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247 } |
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248 |
386 | 249 static void |
250 set_measurement(uint8_t sensor, uint16_t measurement, uint16_t reading) | |
251 { | |
252 measurements[sensor*max_measurements + measurement] = reading; | |
253 } | |
254 | |
255 static uint16_t | |
256 get_measurement(uint8_t sensor, uint16_t measurement) | |
257 { | |
258 return measurements[sensor*max_measurements + measurement]; | |
259 } | |
260 | |
322
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261 static void |
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262 setup_tick_counter() |
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263 { |
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264 // set up counter2. |
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265 // COM21 COM20 Set OC2 on Compare Match (p116) |
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266 // WGM21 Clear counter on compare |
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267 //TCCR2A = _BV(COM2A1) | _BV(COM2A0) | _BV(WGM21); |
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268 // toggle on match |
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269 TCCR2A = _BV(COM2A0); |
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270 // CS22 CS21 CS20 clk/1024 |
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271 TCCR2B = _BV(CS22) | _BV(CS21) | _BV(CS20); |
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272 // set async mode |
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273 ASSR |= _BV(AS2); |
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274 TCNT2 = 0; |
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275 OCR2A = SLEEP_COMPARE; |
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276 // interrupt |
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277 TIMSK2 = _BV(OCIE2A); |
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278 } |
324 | 279 |
306 | 280 static void |
313 | 281 uart_on() |
306 | 282 { |
314 | 283 // Power reduction register |
352
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284 PRR &= ~_BV(PRUSART0); |
314 | 285 |
322
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286 // All of this needs to be done each time after turning off the PRR |
306 | 287 // baud rate |
313 | 288 UBRR0H = (unsigned char)(UBRR >> 8); |
289 UBRR0L = (unsigned char)UBRR; | |
290 // set 2x clock, improves accuracy of UBRR | |
291 UCSR0A |= _BV(U2X0); | |
312 | 292 UCSR0B = _BV(RXCIE0) | _BV(RXEN0) | _BV(TXEN0); |
306 | 293 //8N1 |
313 | 294 UCSR0C = _BV(UCSZ01) | _BV(UCSZ00); |
347 | 295 uart_enabled = 1; |
312 | 296 } |
297 | |
298 static void | |
299 uart_off() | |
300 { | |
395
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301 // Turn off interrupts and disable tx/rx |
312 | 302 UCSR0B = 0; |
347 | 303 uart_enabled = 0; |
312 | 304 |
305 // Power reduction register | |
352
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306 PRR |= _BV(PRUSART0); |
306 | 307 } |
308 | |
316 | 309 int |
306 | 310 uart_putchar(char c, FILE *stream) |
311 { | |
347 | 312 if (!uart_enabled) |
313 { | |
314 return EOF; | |
315 } | |
326
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316 // XXX could perhaps sleep in the loop for power. |
314 | 317 if (c == '\n') |
318 { | |
316 | 319 loop_until_bit_is_set(UCSR0A, UDRE0); |
326
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320 UDR0 = '\r'; |
314 | 321 } |
308 | 322 loop_until_bit_is_set(UCSR0A, UDRE0); |
323 UDR0 = c; | |
326
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324 if (stream == crc_stdout) |
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325 { |
332
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326 crc_out = _crc_ccitt_update(crc_out, c); |
326
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327 } |
316 | 328 if (c == '\r') |
329 { | |
330 loop_until_bit_is_set(UCSR0A, UDRE0); | |
326
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331 UDR0 = '\n'; |
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332 if (stream == crc_stdout) |
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333 { |
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334 crc_out = _crc_ccitt_update(crc_out, '\n'); |
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335 } |
316 | 336 } |
346 | 337 return (unsigned char)c; |
306 | 338 } |
339 | |
340 static void | |
341 cmd_fetch() | |
342 { | |
326
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343 crc_out = 0; |
361
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344 |
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345 fprintf_P(crc_stdout, PSTR("START\n")); |
365 | 346 { |
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347 struct epoch_ticks now; |
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348 get_epoch_ticks(&now); |
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349 fprintf_P(crc_stdout, PSTR("now=%lu\n"), now.ticks); |
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350 fprintf_P(crc_stdout, PSTR("now_rem=%hhu\n"), now.rem); |
365 | 351 } |
387
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352 fprintf_P(crc_stdout, PSTR("time_step=%hu\n"), measure_wake); |
396
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353 fprintf_P(crc_stdout, PSTR("first_time=%lu\n"), first_measurement_clock.ticks); |
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354 fprintf_P(crc_stdout, PSTR("first_time_rem=%hhu\n"), first_measurement_clock.rem); |
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355 fprintf_P(crc_stdout, PSTR("last_time=%lu\n"), last_measurement_clock.ticks); |
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356 fprintf_P(crc_stdout, PSTR("last_time_rem=%hhu\n"), last_measurement_clock.rem); |
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357 fprintf_P(crc_stdout, PSTR("comms_time=%lu\n"), last_comms_clock.ticks); |
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358 fprintf_P(crc_stdout, PSTR("comms_time_rem=%hhu\n"), last_comms_clock.rem); |
387
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359 fprintf_P(crc_stdout, PSTR("voltage=%hu\n"), adc_vcc()); |
393 | 360 fprintf_P(crc_stdout, PSTR("measure=%hu\n"), measure_wake); |
361 fprintf_P(crc_stdout, PSTR("comms=%hu\n"), comms_wake); | |
362 fprintf_P(crc_stdout, PSTR("wake=%hhu\n"), wake_secs); | |
414 | 363 fprintf_P(crc_stdout, PSTR("fridge=%.1f\n"), fridge_setpoint/10.0); |
364 fprintf_P(crc_stdout, PSTR("fridge_diff=%.1f\n"), fridge_difference/10.0); | |
365 fprintf_P(crc_stdout, PSTR("fridge_delay=%hu\n"), fridge_delay); | |
416 | 366 fprintf_P(crc_stdout, PSTR("fridge_status=%hhu\n"), is_fridge_on()); |
396
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367 fprintf_P(crc_stdout, PSTR("tick_secs=%d\n"), TICK); |
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368 fprintf_P(crc_stdout, PSTR("tick_wake=%d\n"), SLEEP_COMPARE); |
393 | 369 fprintf_P(crc_stdout, PSTR("maxsens=%hhu\n"), MAX_SENSORS); |
370 fprintf_P(crc_stdout, PSTR("totalmeas=%hu\n"), TOTAL_MEASUREMENTS); | |
387
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371 fprintf_P(crc_stdout, PSTR("sensors=%hhu\n"), n_sensors); |
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372 for (uint8_t s = 0; s < n_sensors; s++) |
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373 { |
387
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374 fprintf_P(crc_stdout, PSTR("sensor_id%hhu="), s); |
382
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375 printhex(sensor_id[s], ID_LEN, crc_stdout); |
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376 fputc('\n', crc_stdout); |
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377 } |
341
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378 fprintf_P(crc_stdout, PSTR("measurements=%hu\n"), n_measurements); |
320 | 379 for (uint16_t n = 0; n < n_measurements; n++) |
306 | 380 { |
352
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381 fprintf_P(crc_stdout, PSTR("meas%hu="), n); |
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382 for (uint8_t s = 0; s < n_sensors; s++) |
319 | 383 { |
386 | 384 fprintf_P(crc_stdout, PSTR(" %04hx"), get_measurement(s, n)); |
319 | 385 } |
326
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386 fputc('\n', crc_stdout); |
306 | 387 } |
326
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388 fprintf_P(crc_stdout, PSTR("END\n")); |
331
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389 fprintf_P(stdout, PSTR("CRC=%hu\n"), crc_out); |
306 | 390 } |
391 | |
392 static void | |
393 cmd_clear() | |
394 { | |
313 | 395 n_measurements = 0; |
338 | 396 printf_P(PSTR("cleared\n")); |
306 | 397 } |
398 | |
399 static void | |
400 cmd_btoff() | |
401 { | |
399
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402 uint8_t rem; |
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403 uint16_t count_copy; |
365 | 404 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
405 { | |
399
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406 count_copy = comms_count; |
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407 rem = TCNT2; |
365 | 408 } |
399
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409 printf_P(PSTR("next_wake=%hu,"), comms_wake-count_copy); |
396
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410 printf_P(PSTR("rem=%hhu,"), rem); |
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411 printf_P(PSTR("tick_secs=%hhu,"), TICK); |
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412 printf_P(PSTR("tick_wake=%hhu\n"), SLEEP_COMPARE); |
352
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413 _delay_ms(100); |
322
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414 comms_timeout = 0; |
416 | 415 stay_awake = 0; |
306 | 416 } |
417 | |
418 static void | |
360
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419 cmd_reset() |
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420 { |
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421 printf_P(PSTR("reset\n")); |
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422 _delay_ms(100); |
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423 cli(); // disable interrupts |
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424 wdt_enable(WDTO_15MS); // enable watchdog |
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425 while(1); // wait for watchdog to reset processor |
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426 } |
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427 |
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428 static void |
318 | 429 cmd_measure() |
430 { | |
339
449272fc63a3
- Debug log file for server
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diff
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431 printf_P(PSTR("measuring\n")); |
318 | 432 need_measurement = 1; |
433 } | |
434 | |
435 static void | |
436 cmd_sensors() | |
437 { | |
438 uint8_t ret = simple_ds18b20_start_meas(NULL); | |
387
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439 printf_P(PSTR("All sensors, ret %hhu, waiting...\n"), ret); |
320 | 440 long_delay(DS18B20_TCONV_12BIT); |
318 | 441 simple_ds18b20_read_all(); |
442 } | |
443 | |
319 | 444 static void |
382
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445 init_sensors() |
319 | 446 { |
347 | 447 uint8_t id[OW_ROMCODE_SIZE]; |
382
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448 printf_P(PSTR("init sensors\n")); |
319 | 449 ow_reset(); |
347 | 450 for( uint8_t diff = OW_SEARCH_FIRST; diff != OW_LAST_DEVICE; ) |
451 { | |
452 diff = ow_rom_search( diff, &id[0] ); | |
453 if( diff == OW_PRESENCE_ERR ) { | |
454 printf_P( PSTR("No Sensor found\r") ); | |
455 return; | |
456 } | |
457 | |
458 if( diff == OW_DATA_ERR ) { | |
459 printf_P( PSTR("Bus Error\r") ); | |
460 return; | |
461 } | |
382
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462 |
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463 if (n_sensors < MAX_SENSORS) |
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464 { |
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465 memcpy(sensor_id[n_sensors], id, ID_LEN); |
387
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466 printf_P(PSTR("Added sensor %hhu : "), n_sensors); |
382
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467 printhex(id, ID_LEN, stdout); |
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468 putchar('\n'); |
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469 n_sensors++; |
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470 } |
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471 else |
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472 { |
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473 printf_P(PSTR("Too many sensors\n")); |
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474 } |
319 | 475 } |
386 | 476 |
477 max_measurements = TOTAL_MEASUREMENTS / n_sensors; | |
478 } | |
479 | |
480 static void | |
481 load_params() | |
482 { | |
483 uint16_t magic; | |
484 eeprom_read(magic, magic); | |
485 if (magic == EXPECT_MAGIC) | |
486 { | |
487 eeprom_read(measure_wake, measure_wake); | |
488 eeprom_read(comms_wake, comms_wake); | |
489 eeprom_read(wake_secs, wake_secs); | |
414 | 490 eeprom_read(fridge_setpoint, fridge_setpoint); |
491 eeprom_read(fridge_difference, fridge_difference); | |
492 eeprom_read(fridge_delay, fridge_delay); | |
386 | 493 } |
494 } | |
495 | |
496 static void | |
497 cmd_get_params() | |
498 { | |
387
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499 printf_P(PSTR("measure %hu\n"), measure_wake); |
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500 printf_P(PSTR("comms %hu\n"), comms_wake); |
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501 printf_P(PSTR("wake %hhu\n"), wake_secs); |
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502 printf_P(PSTR("tick %d\n"), TICK); |
415
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503 printf_P(PSTR("fridge %.1fº\n"), fridge_setpoint / 10.0f); |
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504 printf_P(PSTR("fridge difference %.1fº\n"), fridge_difference / 10.0f); |
414 | 505 printf_P(PSTR("fridge_delay %hu\n"), fridge_delay); |
387
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506 printf_P(PSTR("sensors %hhu (%hhu)\n"), |
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507 n_sensors, MAX_SENSORS); |
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508 printf_P(PSTR("meas %hu (%hu)\n"), |
386 | 509 max_measurements, TOTAL_MEASUREMENTS); |
319 | 510 } |
511 | |
512 static void | |
386 | 513 cmd_set_params(const char *params) |
319 | 514 { |
386 | 515 uint16_t new_measure_wake; |
516 uint16_t new_comms_wake; | |
517 uint8_t new_wake_secs; | |
415
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518 int ret = sscanf_P(params, PSTR("%hu %hu %hhu"), |
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519 &new_measure_wake, &new_comms_wake, &new_wake_secs); |
386 | 520 |
415
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521 if (ret != 3) |
319 | 522 { |
386 | 523 printf_P(PSTR("Bad values\n")); |
524 } | |
525 else | |
526 { | |
414 | 527 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
528 { | |
529 eeprom_write(new_measure_wake, measure_wake); | |
530 eeprom_write(new_comms_wake, comms_wake); | |
531 eeprom_write(new_wake_secs, wake_secs); | |
532 uint16_t magic = EXPECT_MAGIC; | |
533 eeprom_write(magic, magic); | |
534 } | |
386 | 535 printf_P(PSTR("set_params for next boot\n")); |
415
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536 printf_P(PSTR("measure %hu comms %hu wake %hhu\n"), |
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537 new_measure_wake, new_comms_wake, new_wake_secs); |
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538 } |
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539 } |
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540 |
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541 // returns true if eeprom was written |
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542 static bool |
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543 set_initial_eeprom() |
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544 { |
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545 uint16_t magic; |
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546 eeprom_read(magic, magic); |
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547 if (magic == EXPECT_MAGIC) |
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548 { |
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549 return false; |
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550 } |
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551 |
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552 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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553 { |
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554 eeprom_write(measure_wake, measure_wake); |
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555 eeprom_write(comms_wake, comms_wake); |
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556 eeprom_write(wake_secs, wake_secs); |
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557 eeprom_write(fridge_setpoint, fridge_setpoint); |
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558 eeprom_write(fridge_difference, fridge_difference); |
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559 eeprom_write(fridge_delay, fridge_delay); |
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560 magic = EXPECT_MAGIC; |
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561 eeprom_write(magic, magic); |
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562 } |
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563 |
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564 return true; |
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565 } |
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566 |
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567 static void |
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568 cmd_set_fridge_setpoint(char *params) |
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569 { |
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570 float new_f = atof(params); |
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571 if (new_f < 2 || new_f > 30) |
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572 { |
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573 printf_P(PSTR("Bad fridge value %f\n"), new_f); |
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574 return; |
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575 } |
413 | 576 |
415
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577 fridge_setpoint = new_f * 10; |
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578 bool written = set_initial_eeprom(); |
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579 if (!written) |
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580 { |
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581 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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582 { |
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583 eeprom_write(fridge_setpoint, fridge_setpoint); |
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584 } |
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585 } |
417
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586 printf_P(PSTR("new fridge %.1fº\n"), fridge_setpoint / 10.0f); |
415
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587 } |
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588 |
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589 static void |
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590 cmd_set_fridge_difference(char *params) |
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591 { |
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592 float new_f = atof(params); |
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593 if (new_f < 0 || new_f > 30) |
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594 { |
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595 printf_P(PSTR("Bad fridge value %f\n"), new_f); |
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596 return; |
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597 } |
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598 |
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599 fridge_difference = new_f * 10; |
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600 bool written = set_initial_eeprom(); |
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601 if (!written) |
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602 { |
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603 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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604 { |
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605 eeprom_write(fridge_difference, fridge_difference); |
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606 } |
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607 } |
417
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608 printf_P(PSTR("new fridge difference %.1fº\n"), fridge_difference / 10.0f); |
415
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609 } |
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610 |
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611 static void |
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612 cmd_set_fridge_delay(char *params) |
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613 { |
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614 uint16_t new_delay = atoi(params); |
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615 if (new_delay < 5) |
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616 { |
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617 printf_P(PSTR("Bad fridge delay %d\n"), new_delay); |
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618 return; |
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619 } |
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620 |
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621 fridge_delay = new_delay; |
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622 bool written = set_initial_eeprom(); |
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623 if (!written) |
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624 { |
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625 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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626 { |
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627 eeprom_write(fridge_delay, fridge_delay); |
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628 } |
413 | 629 } |
417
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630 printf_P(PSTR("new fridge delay %hu\n"), fridge_delay); |
386 | 631 } |
414 | 632 |
386 | 633 static void |
634 cmd_awake() | |
635 { | |
636 stay_awake = 1; | |
637 printf_P(PSTR("awake\n")); | |
319 | 638 } |
639 | |
318 | 640 static void |
306 | 641 read_handler() |
642 { | |
312 | 643 if (strcmp_P(readbuf, PSTR("fetch")) == 0) |
306 | 644 { |
645 cmd_fetch(); | |
646 } | |
312 | 647 else if (strcmp_P(readbuf, PSTR("clear")) == 0) |
306 | 648 { |
649 cmd_clear(); | |
650 } | |
312 | 651 else if (strcmp_P(readbuf, PSTR("btoff")) == 0) |
306 | 652 { |
653 cmd_btoff(); | |
654 } | |
318 | 655 else if (strcmp_P(readbuf, PSTR("measure")) == 0) |
656 { | |
657 cmd_measure(); | |
658 } | |
659 else if (strcmp_P(readbuf, PSTR("sensors")) == 0) | |
660 { | |
661 cmd_sensors(); | |
662 } | |
386 | 663 else if (strcmp_P(readbuf, PSTR("get_params")) == 0) |
664 { | |
665 cmd_get_params(); | |
666 } | |
389 | 667 else if (strncmp_P(readbuf, PSTR("set_params "), 11) == 0) |
386 | 668 { |
389 | 669 cmd_set_params(&readbuf[11]); |
386 | 670 } |
671 else if (strcmp_P(readbuf, PSTR("awake")) == 0) | |
672 { | |
673 cmd_awake(); | |
674 } | |
415
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675 else if (strncmp_P(readbuf, PSTR("fridge_setpoint "), 16) == 0) |
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676 { |
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677 cmd_set_fridge_setpoint(&readbuf[16]); |
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678 } |
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679 else if (strncmp_P(readbuf, PSTR("fridge_diff "), 12) == 0) |
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680 { |
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681 cmd_set_fridge_difference(&readbuf[12]); |
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682 } |
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683 else if (strncmp_P(readbuf, PSTR("fridge_delay "), 13) == 0) |
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684 { |
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685 cmd_set_fridge_delay(&readbuf[13]); |
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686 } |
360
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687 else if (strcmp_P(readbuf, PSTR("reset")) == 0) |
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688 { |
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689 cmd_reset(); |
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690 } |
306 | 691 else |
692 { | |
389 | 693 printf_P(PSTR("Bad command '%s'\n"), readbuf); |
306 | 694 } |
695 } | |
696 | |
326
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697 ISR(INT0_vect) |
324 | 698 { |
396
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699 button_pressed = 1; |
330
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700 blink(); |
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701 _delay_ms(100); |
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702 blink(); |
324 | 703 } |
704 | |
705 | |
308 | 706 ISR(USART_RX_vect) |
306 | 707 { |
308 | 708 char c = UDR0; |
339
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|
709 #ifdef HAVE_UART_ECHO |
318 | 710 uart_putchar(c, NULL); |
339
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711 #endif |
328
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712 if (c == '\r' || c == '\n') |
306 | 713 { |
328
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714 if (readpos > 0) |
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715 { |
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716 readbuf[readpos] = '\0'; |
333
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717 have_cmd = 1; |
328
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718 readpos = 0; |
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719 } |
306 | 720 } |
721 else | |
722 { | |
723 readbuf[readpos] = c; | |
724 readpos++; | |
725 if (readpos >= sizeof(readbuf)) | |
726 { | |
727 readpos = 0; | |
728 } | |
729 } | |
730 } | |
731 | |
308 | 732 ISR(TIMER2_COMPA_vect) |
307 | 733 { |
320 | 734 TCNT2 = 0; |
386 | 735 measure_count += TICK; |
736 comms_count += TICK; | |
322
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737 |
386 | 738 clock_epoch += TICK; |
323 | 739 |
322
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740 if (comms_timeout != 0) |
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741 { |
386 | 742 comms_timeout -= TICK; |
322
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743 } |
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744 |
386 | 745 if (measure_count >= measure_wake) |
307 | 746 { |
310
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747 measure_count = 0; |
307 | 748 need_measurement = 1; |
749 } | |
310
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750 |
386 | 751 if (comms_count >= comms_wake) |
347 | 752 { |
753 comms_count = 0; | |
754 need_comms = 1; | |
755 } | |
307 | 756 } |
757 | |
758 static void | |
759 deep_sleep() | |
760 { | |
761 // p119 of manual | |
308 | 762 OCR2A = SLEEP_COMPARE; |
763 loop_until_bit_is_clear(ASSR, OCR2AUB); | |
307 | 764 |
765 set_sleep_mode(SLEEP_MODE_PWR_SAVE); | |
766 sleep_mode(); | |
767 } | |
768 | |
769 static void | |
310
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770 idle_sleep() |
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771 { |
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772 set_sleep_mode(SLEEP_MODE_IDLE); |
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773 sleep_mode(); |
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774 } |
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|
775 |
365 | 776 static uint16_t |
777 adc_vcc() | |
361
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778 { |
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779 PRR &= ~_BV(PRADC); |
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780 |
368 | 781 // /16 prescaler |
361
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782 ADCSRA = _BV(ADEN) | _BV(ADPS2); |
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783 |
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784 // set to measure 1.1 reference |
364 | 785 ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1); |
366 | 786 // average a number of samples |
787 uint16_t sum = 0; | |
788 uint8_t num = 0; | |
789 for (uint8_t n = 0; n < 20; n++) | |
365 | 790 { |
791 ADCSRA |= _BV(ADSC); | |
792 loop_until_bit_is_clear(ADCSRA, ADSC); | |
361
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|
793 |
366 | 794 uint8_t low_11 = ADCL; |
795 uint8_t high_11 = ADCH; | |
796 uint16_t val = low_11 + (high_11 << 8); | |
312 | 797 |
366 | 798 if (n >= 4) |
799 { | |
800 sum += val; | |
801 num++; | |
802 } | |
803 } | |
804 ADCSRA = 0; | |
805 PRR |= _BV(PRADC); | |
312 | 806 |
386 | 807 //float res_volts = 1.1 * 1024 * num / sum; |
808 //return 1000 * res_volts; | |
809 return ((uint32_t)1100*1024*num) / sum; | |
312 | 810 } |
811 | |
310
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812 static void |
414 | 813 do_fridge() |
814 { | |
815 struct epoch_ticks now; | |
816 get_epoch_ticks(&now); | |
417
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diff
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|
817 uint16_t delay_delta = now.ticks - fridge_off_clock.ticks; |
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818 if (delay_delta < fridge_delay) |
414 | 819 { |
417
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|
820 printf_P(PSTR("waiting for fridge delay current %hu, wait %hu\n"), |
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diff
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|
821 delay_delta, fridge_delay); |
414 | 822 return; |
823 } | |
824 | |
825 if (last_wort == DS18X20_INVALID_DECICELSIUS) | |
826 { | |
827 // can't really do much sensible.... alert perhaps? | |
417
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diff
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|
828 printf_P(PSTR("Bad last wort!\n")); |
414 | 829 need_comms = 1; |
830 return; | |
831 } | |
832 | |
833 int16_t wort_delta = last_wort - fridge_setpoint; | |
834 uint8_t fridge_on = PORT_FRIDGE & _BV(PIN_FRIDGE); | |
417
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diff
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|
835 printf_P(PSTR("last_wort %hd, setpoint %hd, delta %hd, fridge_on %d\n"), |
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diff
changeset
|
836 last_wort, fridge_setpoint, wort_delta, fridge_on); |
414 | 837 if (fridge_on) |
838 { | |
839 if (last_wort <= fridge_setpoint) | |
840 { | |
841 // too cold, turn off | |
417
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a bit more logging. make printf floats work
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diff
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|
842 printf_P(PSTR("Turning fridge off\n")); |
414 | 843 PORT_FRIDGE &= ~_BV(PIN_FRIDGE); |
844 fridge_off_clock = now; | |
845 } | |
846 } | |
847 else | |
848 { | |
849 if (wort_delta > fridge_difference) | |
850 { | |
851 // too hot, turn on | |
417
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diff
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|
852 printf_P(PSTR("Turning fridge on\n")); |
414 | 853 PORT_FRIDGE |= _BV(PIN_FRIDGE); |
854 } | |
855 } | |
856 } | |
857 | |
858 static void | |
307 | 859 do_measurement() |
860 { | |
381
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|
861 blink(); |
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|
862 |
396
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|
863 /* Take the timer here since deep_sleep() below could take 6 seconds */ |
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|
864 get_epoch_ticks(&last_measurement_clock); |
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|
865 if (n_measurements == 0) |
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|
866 { |
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|
867 first_measurement_clock = last_measurement_clock; |
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|
868 } |
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|
869 |
361
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|
870 simple_ds18b20_start_meas(NULL); |
365 | 871 // sleep rather than using a long delay |
416 | 872 idle_sleep(); |
365 | 873 //_delay_ms(DS18B20_TCONV_12BIT); |
319 | 874 |
386 | 875 if (n_measurements == max_measurements) |
319 | 876 { |
877 n_measurements = 0; | |
878 } | |
312 | 879 |
386 | 880 for (uint8_t s = 0; s < n_sensors; s++) |
319 | 881 { |
381
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diff
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|
882 uint16_t reading; |
386 | 883 uint8_t ret = simple_ds18b20_read_raw(sensor_id[s], &reading); |
884 if (ret != DS18X20_OK) | |
319 | 885 { |
386 | 886 reading = VALUE_BROKEN; |
319 | 887 } |
386 | 888 set_measurement(s, n_measurements, reading); |
414 | 889 |
890 if (memcmp(sensor_id[s], fridge_id, sizeof(fridge_id)) == 0) | |
891 { | |
892 last_fridge = ds18b20_raw16_to_decicelsius(reading);; | |
893 } | |
894 if (memcmp(sensor_id[s], wort_id, sizeof(wort_id)) == 0) | |
895 { | |
896 last_wort = ds18b20_raw16_to_decicelsius(reading);; | |
897 } | |
319 | 898 } |
328
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|
899 |
320 | 900 n_measurements++; |
307 | 901 } |
902 | |
310
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|
903 static void |
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|
904 do_comms() |
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|
905 { |
396
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|
906 get_epoch_ticks(&last_comms_clock); |
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|
907 |
347 | 908 // turn on bluetooth |
330
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|
909 set_aux_power(1); |
395
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diff
changeset
|
910 // avoid receiving rubbish, perhaps |
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diff
changeset
|
911 _delay_ms(50); |
313 | 912 uart_on(); |
347 | 913 |
914 // write sd card here? same 3.3v regulator... | |
915 | |
386 | 916 for (comms_timeout = wake_secs; |
917 comms_timeout > 0 || stay_awake; | |
918 ) | |
347 | 919 { |
312 | 920 if (need_measurement) |
921 { | |
320 | 922 need_measurement = 0; |
312 | 923 do_measurement(); |
414 | 924 do_fridge(); |
349 | 925 continue; |
312 | 926 } |
927 | |
333
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|
928 if (have_cmd) |
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|
929 { |
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|
930 have_cmd = 0; |
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|
931 read_handler(); |
349 | 932 continue; |
333
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|
933 } |
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|
934 |
322
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diff
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|
935 // wait for commands from the master |
347 | 936 idle_sleep(); |
937 } | |
310
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|
938 |
312 | 939 uart_off(); |
352
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diff
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|
940 // in case bluetooth takes time to flush |
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diff
changeset
|
941 _delay_ms(100); |
322
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diff
changeset
|
942 set_aux_power(0); |
310
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|
943 } |
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|
944 |
313 | 945 static void |
946 blink() | |
947 { | |
948 PORT_LED &= ~_BV(PIN_LED); | |
315 | 949 _delay_ms(1); |
313 | 950 PORT_LED |= _BV(PIN_LED); |
951 } | |
952 | |
953 static void | |
954 long_delay(int ms) | |
955 { | |
956 int iter = ms / 100; | |
957 | |
958 for (int i = 0; i < iter; i++) | |
959 { | |
960 _delay_ms(100); | |
961 } | |
962 } | |
963 | |
314 | 964 ISR(BADISR_vect) |
965 { | |
320 | 966 //uart_on(); |
314 | 967 printf_P(PSTR("Bad interrupt\n")); |
968 } | |
969 | |
306 | 970 int main(void) |
971 { | |
322
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972 setup_chip(); |
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973 blink(); |
315 | 974 |
322
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975 set_aux_power(0); |
313 | 976 |
312 | 977 stdout = &mystdout; |
313 | 978 uart_on(); |
979 | |
322
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980 printf(PSTR("Started.\n")); |
319 | 981 |
386 | 982 load_params(); |
319 | 983 |
382
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984 init_sensors(); |
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985 |
314 | 986 uart_off(); |
306 | 987 |
312 | 988 // turn off everything except timer2 |
352
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989 PRR = _BV(PRTWI) | _BV(PRTIM0) | _BV(PRTIM1) | _BV(PRSPI) | _BV(PRUSART0) | _BV(PRADC); |
314 | 990 |
322
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991 setup_tick_counter(); |
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992 |
318 | 993 sei(); |
314 | 994 |
331
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995 need_comms = 1; |
341
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996 need_measurement = 1; |
331
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997 |
416 | 998 stay_awake = 1; |
999 | |
322
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1000 for(;;) |
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1001 { |
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1002 if (button_pressed) |
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1003 { |
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1004 // debounce |
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1005 _delay_ms(200); |
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1006 need_comms = 1; |
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1007 comms_timeout = wake_secs; |
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1008 button_pressed = 0; |
347 | 1009 continue; |
307 | 1010 } |
310
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1011 |
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1012 if (need_comms) |
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1013 { |
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1014 need_comms = 0; |
310
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1015 do_comms(); |
347 | 1016 continue; |
310
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1017 } |
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1018 |
402 | 1019 if (need_measurement) |
1020 { | |
1021 need_measurement = 0; | |
1022 do_measurement(); | |
414 | 1023 do_fridge(); |
402 | 1024 continue; |
1025 } | |
1026 | |
347 | 1027 deep_sleep(); |
306 | 1028 } |
318 | 1029 |
306 | 1030 return 0; /* never reached */ |
1031 } |