Mercurial > templog
annotate old/main.c @ 507:3a3cbda62a9e
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| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Sun, 30 Mar 2014 20:31:54 +0800 |
| parents | 95043860e437 |
| children |
| rev | line source |
|---|---|
| 306 | 1 #include <stdio.h> |
| 2 #include <string.h> | |
| 319 | 3 #include <stddef.h> |
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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 | |
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25 #define MIN(X,Y) ((X) < (Y) ? (X) : (Y)) |
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26 #define MAX(X,Y) ((X) > (Y) ? (X) : (Y)) |
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27 |
| 386 | 28 // TICK should be 8 or less (8 untested). all timers need |
| 29 // to be a multiple. | |
| 30 | |
| 31 #define TICK 6 | |
| 32 // we have 1024 prescaler, 32768 crystal. | |
| 33 #define SLEEP_COMPARE (32*TICK-1) | |
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34 |
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35 #define VALUE_NOSENSOR 0x07D0 // 125 degrees |
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36 #define VALUE_BROKEN 0x07D1 // 125.0625 |
| 319 | 37 |
| 434 | 38 #define OVERSHOOT_MAX_DIV 1800.0 // 30 mins |
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39 #define WORT_INVALID_TIME 900 // 15 mins |
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40 // fridge min/max are only used if the wort sensor is invalid |
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41 #define FRIDGE_AIR_MIN_RANGE 40 // 4º |
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42 #define FRIDGE_AIR_MAX_RANGE 40 // 4º |
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43 |
| 316 | 44 #define BAUD 19200 |
| 313 | 45 #define UBRR ((F_CPU)/8/(BAUD)-1) |
| 46 | |
| 47 #define PORT_LED PORTC | |
| 48 #define DDR_LED DDRC | |
| 49 #define PIN_LED PC4 | |
| 307 | 50 |
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51 #define PORT_SHDN PORTD |
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52 #define DDR_SHDN DDRD |
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53 #define PIN_SHDN PD7 |
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54 |
| 414 | 55 #define PORT_FRIDGE PORTD |
| 56 #define DDR_FRIDGE DDRD | |
| 57 #define PIN_FRIDGE PD6 | |
| 58 | |
| 386 | 59 // total amount of 16bit values available for measurements. |
| 60 // adjust emperically, be sure to allow enough stack space too | |
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61 #define TOTAL_MEASUREMENTS 800 |
| 386 | 62 |
| 63 // each sensor slot uses 8 bytes | |
| 64 #define MAX_SENSORS 6 | |
| 312 | 65 |
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66 // fixed at 8, have a shorter name |
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67 #define ID_LEN OW_ROMCODE_SIZE |
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68 |
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69 // #define HAVE_UART_ECHO |
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70 |
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71 // stores a value of clock_epoch combined with the remainder of TCNT2, |
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72 // for 1/32 second accuracy |
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73 struct epoch_ticks |
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74 { |
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75 uint32_t ticks; |
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76 // remainder |
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77 uint8_t rem; |
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78 }; |
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79 |
| 386 | 80 // eeprom-settable parameters. all timeouts should |
| 81 // be a multiple of TICK (6 seconds probably) | |
| 414 | 82 static uint16_t measure_wake = 61; // not a divisor of comms_wake |
| 83 static uint16_t comms_wake = 600; | |
| 386 | 84 static uint8_t wake_secs = 30; |
| 414 | 85 // decidegrees |
| 86 static int16_t fridge_setpoint = 180; // 18.0ºC | |
| 435 | 87 static uint16_t fridge_difference = 3; // 0.3ºC |
| 414 | 88 static uint16_t fridge_delay = 600; // seconds |
| 413 | 89 |
| 434 | 90 static uint16_t overshoot_delay = 720; // 12 mins |
| 91 static uint8_t overshoot_factor = 10; // 1.0ºC | |
| 92 | |
| 365 | 93 // ---- Atomic guards required accessing these variables |
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94 // clock_epoch in seconds |
| 365 | 95 static uint32_t clock_epoch; |
| 96 static uint16_t comms_count; | |
| 97 static uint16_t measure_count; | |
| 98 // ---- End atomic guards required | |
| 99 | |
| 323 | 100 static uint16_t n_measurements; |
| 365 | 101 |
| 386 | 102 // calculated at startup as TOTAL_MEASUREMENTS/n_sensors |
| 103 static uint16_t max_measurements; | |
| 104 | |
| 105 static uint16_t measurements[TOTAL_MEASUREMENTS]; | |
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106 |
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107 static struct epoch_ticks first_measurement_clock; |
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108 // last_measurement_clock is redundant but checks that we're not missing |
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109 // samples |
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110 static struct epoch_ticks last_measurement_clock; |
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111 static struct epoch_ticks last_comms_clock; |
| 365 | 112 |
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113 // boolean flags |
| 323 | 114 static uint8_t need_measurement; |
| 115 static uint8_t need_comms; | |
| 346 | 116 static uint8_t uart_enabled; |
| 386 | 117 static uint8_t stay_awake; |
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118 static uint8_t button_pressed; |
| 307 | 119 |
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120 // counts down from WAKE_SECS to 0, goes to deep sleep when hits 0 |
| 323 | 121 static uint8_t comms_timeout; |
| 307 | 122 |
| 323 | 123 static uint8_t readpos; |
| 306 | 124 static char readbuf[30]; |
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125 static uint8_t have_cmd; |
| 306 | 126 |
| 386 | 127 static uint8_t n_sensors; |
| 128 static uint8_t sensor_id[MAX_SENSORS][ID_LEN]; | |
| 129 | |
| 414 | 130 static int16_t last_fridge = DS18X20_INVALID_DECICELSIUS; |
| 131 static int16_t last_wort = DS18X20_INVALID_DECICELSIUS; | |
| 132 static struct epoch_ticks fridge_off_clock = {0}; | |
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133 static struct epoch_ticks fridge_on_clock = {0}; |
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134 static struct epoch_ticks wort_valid_clock = {0}; |
| 386 | 135 |
| 136 int uart_putchar(char c, FILE *stream); | |
| 137 static void long_delay(int ms); | |
| 138 static void blink(); | |
| 139 static uint16_t adc_vcc(); | |
| 140 | |
| 141 static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL, | |
| 142 _FDEV_SETUP_WRITE); | |
| 143 | |
| 144 static uint16_t crc_out; | |
| 145 static FILE _crc_stdout = FDEV_SETUP_STREAM(uart_putchar, NULL, | |
| 146 _FDEV_SETUP_WRITE); | |
| 147 // convenience | |
| 148 static FILE *crc_stdout = &_crc_stdout; | |
| 149 | |
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150 |
| 319 | 151 // thanks to http://projectgus.com/2010/07/eeprom-access-with-arduino/ |
| 152 #define eeprom_read_to(dst_p, eeprom_field, dst_size) eeprom_read_block((dst_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (dst_size)) | |
| 153 #define eeprom_read(dst, eeprom_field) eeprom_read_to((&dst), eeprom_field, sizeof(dst)) | |
| 154 #define eeprom_write_from(src_p, eeprom_field, src_size) eeprom_write_block((src_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (src_size)) | |
| 155 #define eeprom_write(src, eeprom_field) { eeprom_write_from(&src, eeprom_field, sizeof(src)); } | |
| 156 | |
| 157 #define EXPECT_MAGIC 0x67c9 | |
| 158 | |
| 159 struct __attribute__ ((__packed__)) __eeprom_data { | |
| 386 | 160 uint16_t measure_wake; |
| 161 uint16_t comms_wake; | |
| 162 uint8_t wake_secs; | |
| 413 | 163 |
| 414 | 164 int16_t fridge_setpoint; // decidegrees |
| 435 | 165 uint16_t fridge_difference; // decidegrees |
| 414 | 166 uint16_t fridge_delay; |
| 413 | 167 |
| 434 | 168 uint16_t overshoot_delay; |
| 169 uint8_t overshoot_factor; // decidegrees | |
| 170 | |
| 414 | 171 #if 0 |
| 172 static uint8_t wort_id[ID_LEN]; | |
| 173 static uint8_t fridge_id[ID_LEN]; | |
| 174 #endif | |
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175 |
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176 uint16_t magic; |
| 414 | 177 }; |
| 413 | 178 |
| 414 | 179 static const uint8_t fridge_id[ID_LEN] = |
| 180 {0x28,0xCE,0xB2,0x1A,0x03,0x00,0x00,0x99}; | |
| 181 static const uint8_t wort_id[ID_LEN] = | |
| 182 {0x28,0x49,0xBC,0x1A,0x03,0x00,0x00,0x54}; | |
| 319 | 183 |
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184 static void deep_sleep(); |
| 307 | 185 |
| 416 | 186 // 0 or 1 |
| 187 static uint8_t | |
| 188 is_fridge_on() | |
| 189 { | |
| 190 if (PORT_FRIDGE & _BV(PIN_FRIDGE)) | |
| 191 { | |
| 192 return 1; | |
| 193 } | |
| 194 else | |
| 195 { | |
| 196 return 0; | |
| 197 } | |
| 198 } | |
| 199 | |
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200 // Very first setup |
| 324 | 201 static void |
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202 setup_chip() |
| 324 | 203 { |
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204 cli(); |
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205 |
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206 // stop watchdog timer (might have been used to cause a reset) |
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207 wdt_reset(); |
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208 MCUSR &= ~_BV(WDRF); |
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209 WDTCSR |= _BV(WDCE) | _BV(WDE); |
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210 WDTCSR = 0; |
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211 |
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212 // Set clock to 2mhz |
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213 CLKPR = _BV(CLKPCE); |
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214 // divide by 4 |
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215 CLKPR = _BV(CLKPS1); |
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216 |
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217 // enable pullups |
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218 PORTB = 0xff; // XXX change when using SPI |
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219 PORTD = 0xff; |
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220 PORTC = 0xff; |
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221 |
| 325 | 222 // 3.3v power for bluetooth and SD |
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223 DDR_LED |= _BV(PIN_LED); |
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224 DDR_SHDN |= _BV(PIN_SHDN); |
| 325 | 225 |
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226 PORT_FRIDGE &= ~_BV(PIN_FRIDGE); |
| 414 | 227 DDR_FRIDGE |= _BV(PIN_FRIDGE); |
| 228 | |
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229 // set pullup |
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230 PORTD |= _BV(PD2); |
| 347 | 231 // INT0 setup |
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232 EICRA = (1<<ISC01); // falling edge - data sheet says it won't work? |
| 347 | 233 EIMSK = _BV(INT0); |
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234 |
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235 // comparator disable |
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236 ACSR = _BV(ACD); |
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237 |
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238 // disable adc pin input buffers |
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239 DIDR0 = 0x3F; // acd0-adc5 |
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240 DIDR1 = (1<<AIN1D)|(1<<AIN0D); // ain0/ain1 |
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241 |
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242 sei(); |
| 324 | 243 } |
| 244 | |
|
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245 static void |
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246 set_aux_power(uint8_t on) |
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247 { |
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248 if (on) |
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249 { |
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250 PORT_SHDN &= ~_BV(PIN_SHDN); |
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251 } |
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252 else |
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253 { |
| 349 | 254 PORT_SHDN |= _BV(PIN_SHDN); |
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255 } |
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256 } |
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257 |
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258 static void |
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259 get_epoch_ticks(struct epoch_ticks *t) |
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260 { |
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261 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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262 { |
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263 t->ticks = clock_epoch; |
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264 t->rem = TCNT2; |
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265 } |
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266 } |
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267 |
| 386 | 268 static void |
| 269 set_measurement(uint8_t sensor, uint16_t measurement, uint16_t reading) | |
| 270 { | |
| 271 measurements[sensor*max_measurements + measurement] = reading; | |
| 272 } | |
| 273 | |
| 274 static uint16_t | |
| 275 get_measurement(uint8_t sensor, uint16_t measurement) | |
| 276 { | |
| 277 return measurements[sensor*max_measurements + measurement]; | |
| 278 } | |
| 279 | |
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280 static void |
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281 setup_tick_counter() |
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282 { |
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283 // set up counter2. |
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284 // COM21 COM20 Set OC2 on Compare Match (p116) |
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285 // WGM21 Clear counter on compare |
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286 //TCCR2A = _BV(COM2A1) | _BV(COM2A0) | _BV(WGM21); |
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287 // toggle on match |
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288 TCCR2A = _BV(COM2A0); |
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289 // CS22 CS21 CS20 clk/1024 |
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290 TCCR2B = _BV(CS22) | _BV(CS21) | _BV(CS20); |
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291 // set async mode |
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292 ASSR |= _BV(AS2); |
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293 TCNT2 = 0; |
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294 OCR2A = SLEEP_COMPARE; |
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295 // interrupt |
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296 TIMSK2 = _BV(OCIE2A); |
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297 } |
| 324 | 298 |
| 306 | 299 static void |
| 313 | 300 uart_on() |
| 306 | 301 { |
| 314 | 302 // Power reduction register |
|
352
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303 PRR &= ~_BV(PRUSART0); |
| 314 | 304 |
|
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305 // All of this needs to be done each time after turning off the PRR |
| 306 | 306 // baud rate |
| 313 | 307 UBRR0H = (unsigned char)(UBRR >> 8); |
| 308 UBRR0L = (unsigned char)UBRR; | |
| 309 // set 2x clock, improves accuracy of UBRR | |
| 310 UCSR0A |= _BV(U2X0); | |
| 312 | 311 UCSR0B = _BV(RXCIE0) | _BV(RXEN0) | _BV(TXEN0); |
| 306 | 312 //8N1 |
| 313 | 313 UCSR0C = _BV(UCSZ01) | _BV(UCSZ00); |
| 347 | 314 uart_enabled = 1; |
| 312 | 315 } |
| 316 | |
| 317 static void | |
| 318 uart_off() | |
| 319 { | |
|
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320 // Turn off interrupts and disable tx/rx |
| 312 | 321 UCSR0B = 0; |
| 347 | 322 uart_enabled = 0; |
| 312 | 323 |
| 324 // Power reduction register | |
|
352
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325 PRR |= _BV(PRUSART0); |
| 306 | 326 } |
| 327 | |
| 316 | 328 int |
| 306 | 329 uart_putchar(char c, FILE *stream) |
| 330 { | |
| 347 | 331 if (!uart_enabled) |
| 332 { | |
| 333 return EOF; | |
| 334 } | |
|
326
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335 // XXX could perhaps sleep in the loop for power. |
| 314 | 336 if (c == '\n') |
| 337 { | |
| 316 | 338 loop_until_bit_is_set(UCSR0A, UDRE0); |
|
326
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339 UDR0 = '\r'; |
| 314 | 340 } |
| 308 | 341 loop_until_bit_is_set(UCSR0A, UDRE0); |
| 342 UDR0 = c; | |
|
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343 if (stream == crc_stdout) |
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344 { |
|
332
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345 crc_out = _crc_ccitt_update(crc_out, c); |
|
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346 } |
| 316 | 347 if (c == '\r') |
| 348 { | |
| 349 loop_until_bit_is_set(UCSR0A, UDRE0); | |
|
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350 UDR0 = '\n'; |
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351 if (stream == crc_stdout) |
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352 { |
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353 crc_out = _crc_ccitt_update(crc_out, '\n'); |
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354 } |
| 316 | 355 } |
| 346 | 356 return (unsigned char)c; |
| 306 | 357 } |
| 358 | |
| 359 static void | |
| 360 cmd_fetch() | |
| 361 { | |
|
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362 crc_out = 0; |
|
361
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363 |
|
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364 fprintf_P(crc_stdout, PSTR("START\n")); |
| 365 | 365 { |
|
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366 struct epoch_ticks now; |
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367 get_epoch_ticks(&now); |
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368 fprintf_P(crc_stdout, PSTR("now=%lu\n"), now.ticks); |
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369 fprintf_P(crc_stdout, PSTR("now_rem=%hhu\n"), now.rem); |
| 365 | 370 } |
|
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371 fprintf_P(crc_stdout, PSTR("time_step=%hu\n"), measure_wake); |
|
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372 fprintf_P(crc_stdout, PSTR("first_time=%lu\n"), first_measurement_clock.ticks); |
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373 fprintf_P(crc_stdout, PSTR("first_time_rem=%hhu\n"), first_measurement_clock.rem); |
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374 fprintf_P(crc_stdout, PSTR("last_time=%lu\n"), last_measurement_clock.ticks); |
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375 fprintf_P(crc_stdout, PSTR("last_time_rem=%hhu\n"), last_measurement_clock.rem); |
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376 fprintf_P(crc_stdout, PSTR("comms_time=%lu\n"), last_comms_clock.ticks); |
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377 fprintf_P(crc_stdout, PSTR("comms_time_rem=%hhu\n"), last_comms_clock.rem); |
|
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|
378 fprintf_P(crc_stdout, PSTR("voltage=%hu\n"), adc_vcc()); |
| 393 | 379 fprintf_P(crc_stdout, PSTR("measure=%hu\n"), measure_wake); |
| 380 fprintf_P(crc_stdout, PSTR("comms=%hu\n"), comms_wake); | |
| 381 fprintf_P(crc_stdout, PSTR("wake=%hhu\n"), wake_secs); | |
| 414 | 382 fprintf_P(crc_stdout, PSTR("fridge=%.1f\n"), fridge_setpoint/10.0); |
| 383 fprintf_P(crc_stdout, PSTR("fridge_diff=%.1f\n"), fridge_difference/10.0); | |
| 384 fprintf_P(crc_stdout, PSTR("fridge_delay=%hu\n"), fridge_delay); | |
| 434 | 385 fprintf_P(crc_stdout, PSTR("overshoot_factor=%.1f\n"), overshoot_factor/10.0); |
| 386 fprintf_P(crc_stdout, PSTR("overshoot_delay=%hu\n"), overshoot_delay); | |
| 416 | 387 fprintf_P(crc_stdout, PSTR("fridge_status=%hhu\n"), is_fridge_on()); |
|
427
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388 fprintf_P(crc_stdout, PSTR("fridge_last_on=%lu\n"), fridge_on_clock.ticks); |
|
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389 fprintf_P(crc_stdout, PSTR("fridge_last_off=%lu\n"), fridge_off_clock.ticks); |
|
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diff
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390 fprintf_P(crc_stdout, PSTR("last_fridge=%hu\n"), last_fridge); |
|
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391 fprintf_P(crc_stdout, PSTR("last_wort=%hu\n"), last_wort); |
|
396
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392 fprintf_P(crc_stdout, PSTR("tick_secs=%d\n"), TICK); |
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393 fprintf_P(crc_stdout, PSTR("tick_wake=%d\n"), SLEEP_COMPARE); |
| 393 | 394 fprintf_P(crc_stdout, PSTR("maxsens=%hhu\n"), MAX_SENSORS); |
| 395 fprintf_P(crc_stdout, PSTR("totalmeas=%hu\n"), TOTAL_MEASUREMENTS); | |
|
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396 fprintf_P(crc_stdout, PSTR("sensors=%hhu\n"), n_sensors); |
|
321
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397 for (uint8_t s = 0; s < n_sensors; s++) |
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398 { |
|
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399 fprintf_P(crc_stdout, PSTR("sensor_id%hhu="), s); |
|
382
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400 printhex(sensor_id[s], ID_LEN, crc_stdout); |
|
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401 fputc('\n', crc_stdout); |
|
321
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402 } |
|
341
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diff
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|
403 fprintf_P(crc_stdout, PSTR("measurements=%hu\n"), n_measurements); |
| 320 | 404 for (uint16_t n = 0; n < n_measurements; n++) |
| 306 | 405 { |
|
352
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406 fprintf_P(crc_stdout, PSTR("meas%hu="), n); |
|
321
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407 for (uint8_t s = 0; s < n_sensors; s++) |
| 319 | 408 { |
| 386 | 409 fprintf_P(crc_stdout, PSTR(" %04hx"), get_measurement(s, n)); |
| 319 | 410 } |
|
326
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411 fputc('\n', crc_stdout); |
| 306 | 412 } |
|
326
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|
413 fprintf_P(crc_stdout, PSTR("END\n")); |
|
331
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diff
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|
414 fprintf_P(stdout, PSTR("CRC=%hu\n"), crc_out); |
| 306 | 415 } |
| 416 | |
| 417 static void | |
| 418 cmd_clear() | |
| 419 { | |
| 313 | 420 n_measurements = 0; |
| 338 | 421 printf_P(PSTR("cleared\n")); |
| 306 | 422 } |
| 423 | |
| 424 static void | |
| 425 cmd_btoff() | |
| 426 { | |
|
399
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|
427 uint8_t rem; |
|
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428 uint16_t count_copy; |
| 365 | 429 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
| 430 { | |
|
399
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431 count_copy = comms_count; |
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432 rem = TCNT2; |
| 365 | 433 } |
|
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434 printf_P(PSTR("next_wake=%hu,"), comms_wake-count_copy); |
|
396
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435 printf_P(PSTR("rem=%hhu,"), rem); |
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436 printf_P(PSTR("tick_secs=%hhu,"), TICK); |
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437 printf_P(PSTR("tick_wake=%hhu\n"), SLEEP_COMPARE); |
|
352
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438 _delay_ms(100); |
|
322
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439 comms_timeout = 0; |
| 416 | 440 stay_awake = 0; |
| 306 | 441 } |
| 442 | |
| 443 static void | |
|
360
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444 cmd_reset() |
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445 { |
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446 printf_P(PSTR("reset\n")); |
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447 _delay_ms(100); |
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448 cli(); // disable interrupts |
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449 wdt_enable(WDTO_15MS); // enable watchdog |
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450 while(1); // wait for watchdog to reset processor |
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451 } |
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452 |
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453 static void |
| 318 | 454 cmd_measure() |
| 455 { | |
|
339
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456 printf_P(PSTR("measuring\n")); |
| 318 | 457 need_measurement = 1; |
| 458 } | |
| 459 | |
| 460 static void | |
| 461 cmd_sensors() | |
| 462 { | |
| 463 uint8_t ret = simple_ds18b20_start_meas(NULL); | |
|
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464 printf_P(PSTR("All sensors, ret %hhu, waiting...\n"), ret); |
| 320 | 465 long_delay(DS18B20_TCONV_12BIT); |
| 318 | 466 simple_ds18b20_read_all(); |
| 467 } | |
| 468 | |
| 319 | 469 static void |
|
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470 init_sensors() |
| 319 | 471 { |
| 347 | 472 uint8_t id[OW_ROMCODE_SIZE]; |
|
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473 printf_P(PSTR("init sensors\n")); |
| 319 | 474 ow_reset(); |
| 347 | 475 for( uint8_t diff = OW_SEARCH_FIRST; diff != OW_LAST_DEVICE; ) |
| 476 { | |
| 477 diff = ow_rom_search( diff, &id[0] ); | |
| 478 if( diff == OW_PRESENCE_ERR ) { | |
| 479 printf_P( PSTR("No Sensor found\r") ); | |
| 480 return; | |
| 481 } | |
| 482 | |
| 483 if( diff == OW_DATA_ERR ) { | |
| 484 printf_P( PSTR("Bus Error\r") ); | |
| 485 return; | |
| 486 } | |
|
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487 |
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488 if (n_sensors < MAX_SENSORS) |
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489 { |
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490 memcpy(sensor_id[n_sensors], id, ID_LEN); |
|
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491 printf_P(PSTR("Added sensor %hhu : "), n_sensors); |
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492 printhex(id, ID_LEN, stdout); |
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493 putchar('\n'); |
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494 n_sensors++; |
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495 } |
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496 else |
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497 { |
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498 printf_P(PSTR("Too many sensors\n")); |
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499 } |
| 319 | 500 } |
| 386 | 501 |
| 502 max_measurements = TOTAL_MEASUREMENTS / n_sensors; | |
| 503 } | |
| 504 | |
| 505 static void | |
| 506 load_params() | |
| 507 { | |
| 508 uint16_t magic; | |
| 509 eeprom_read(magic, magic); | |
| 510 if (magic == EXPECT_MAGIC) | |
| 511 { | |
| 512 eeprom_read(measure_wake, measure_wake); | |
| 513 eeprom_read(comms_wake, comms_wake); | |
| 514 eeprom_read(wake_secs, wake_secs); | |
| 414 | 515 eeprom_read(fridge_setpoint, fridge_setpoint); |
| 516 eeprom_read(fridge_difference, fridge_difference); | |
| 517 eeprom_read(fridge_delay, fridge_delay); | |
| 434 | 518 eeprom_read(overshoot_delay, overshoot_delay); |
| 519 eeprom_read(overshoot_factor, overshoot_factor); | |
| 386 | 520 } |
| 521 } | |
| 522 | |
| 523 static void | |
| 524 cmd_get_params() | |
| 525 { | |
|
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526 printf_P(PSTR("measure %hu\n"), measure_wake); |
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527 printf_P(PSTR("comms %hu\n"), comms_wake); |
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528 printf_P(PSTR("wake %hhu\n"), wake_secs); |
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529 printf_P(PSTR("tick %d\n"), TICK); |
|
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530 printf_P(PSTR("fridge %.1fº\n"), fridge_setpoint / 10.0f); |
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531 printf_P(PSTR("fridge difference %.1fº\n"), fridge_difference / 10.0f); |
| 414 | 532 printf_P(PSTR("fridge_delay %hu\n"), fridge_delay); |
| 434 | 533 printf_P(PSTR("overshoot factor %.1fº\n"), overshoot_factor / 10.0f); |
| 534 printf_P(PSTR("overshoot delay %hu\n"), overshoot_delay); | |
|
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535 printf_P(PSTR("sensors %hhu (%hhu)\n"), |
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536 n_sensors, MAX_SENSORS); |
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537 printf_P(PSTR("meas %hu (%hu)\n"), |
| 386 | 538 max_measurements, TOTAL_MEASUREMENTS); |
| 319 | 539 } |
| 540 | |
| 541 static void | |
| 386 | 542 cmd_set_params(const char *params) |
| 319 | 543 { |
| 386 | 544 uint16_t new_measure_wake; |
| 545 uint16_t new_comms_wake; | |
| 546 uint8_t new_wake_secs; | |
|
415
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547 int ret = sscanf_P(params, PSTR("%hu %hu %hhu"), |
|
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548 &new_measure_wake, &new_comms_wake, &new_wake_secs); |
| 386 | 549 |
|
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550 if (ret != 3) |
| 319 | 551 { |
| 386 | 552 printf_P(PSTR("Bad values\n")); |
| 553 } | |
| 554 else | |
| 555 { | |
| 414 | 556 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
| 557 { | |
| 558 eeprom_write(new_measure_wake, measure_wake); | |
| 559 eeprom_write(new_comms_wake, comms_wake); | |
| 560 eeprom_write(new_wake_secs, wake_secs); | |
| 561 uint16_t magic = EXPECT_MAGIC; | |
| 562 eeprom_write(magic, magic); | |
| 563 } | |
| 386 | 564 printf_P(PSTR("set_params for next boot\n")); |
|
415
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|
565 printf_P(PSTR("measure %hu comms %hu wake %hhu\n"), |
|
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|
566 new_measure_wake, new_comms_wake, new_wake_secs); |
|
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|
567 } |
|
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|
568 } |
|
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|
569 |
|
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|
570 // returns true if eeprom was written |
|
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|
571 static bool |
|
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|
572 set_initial_eeprom() |
|
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|
573 { |
|
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|
574 uint16_t magic; |
|
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575 eeprom_read(magic, magic); |
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576 if (magic == EXPECT_MAGIC) |
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|
577 { |
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|
578 return false; |
|
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|
579 } |
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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(measure_wake, measure_wake); |
|
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|
584 eeprom_write(comms_wake, comms_wake); |
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|
585 eeprom_write(wake_secs, wake_secs); |
|
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|
586 eeprom_write(fridge_setpoint, fridge_setpoint); |
|
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587 eeprom_write(fridge_difference, fridge_difference); |
|
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588 eeprom_write(fridge_delay, fridge_delay); |
| 434 | 589 eeprom_write(overshoot_delay, overshoot_delay); |
| 590 eeprom_write(overshoot_factor, overshoot_factor); | |
|
415
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591 magic = EXPECT_MAGIC; |
|
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592 eeprom_write(magic, magic); |
|
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593 } |
|
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|
594 |
|
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|
595 return true; |
|
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596 } |
|
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597 |
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598 static void |
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599 cmd_set_fridge_setpoint(char *params) |
|
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600 { |
|
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601 float new_f = atof(params); |
|
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602 if (new_f < 2 || new_f > 30) |
|
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|
603 { |
|
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|
604 printf_P(PSTR("Bad fridge value %f\n"), new_f); |
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|
605 return; |
|
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|
606 } |
| 413 | 607 |
|
420
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608 int16_t old_setpoint = fridge_setpoint; |
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|
609 |
|
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610 fridge_setpoint = new_f * 10; |
|
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611 bool written = set_initial_eeprom(); |
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612 if (!written) |
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613 { |
|
420
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614 if (old_setpoint != fridge_setpoint) |
|
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615 { |
|
420
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616 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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617 { |
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618 eeprom_write(fridge_setpoint, fridge_setpoint); |
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619 } |
|
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620 } |
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621 } |
|
420
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622 printf_P(PSTR("old fridge %.1fº new fridge %.1fº\n"), |
|
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623 old_setpoint / 10.0f, fridge_setpoint / 10.0f); |
|
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624 } |
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625 |
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626 static void |
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627 cmd_set_fridge_difference(char *params) |
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628 { |
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629 float new_f = atof(params); |
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630 if (new_f < 0 || new_f > 30) |
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631 { |
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632 printf_P(PSTR("Bad fridge value %f\n"), new_f); |
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633 return; |
|
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|
634 } |
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635 |
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636 fridge_difference = new_f * 10; |
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637 bool written = set_initial_eeprom(); |
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638 if (!written) |
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639 { |
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640 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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641 { |
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642 eeprom_write(fridge_difference, fridge_difference); |
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643 } |
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644 } |
|
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645 printf_P(PSTR("new fridge difference %.1fº\n"), fridge_difference / 10.0f); |
|
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646 } |
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647 |
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648 static void |
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649 cmd_set_fridge_delay(char *params) |
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650 { |
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651 uint16_t new_delay = atoi(params); |
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652 if (new_delay < 5) |
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653 { |
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654 printf_P(PSTR("Bad fridge delay %d\n"), new_delay); |
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655 return; |
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656 } |
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657 |
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658 fridge_delay = new_delay; |
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659 bool written = set_initial_eeprom(); |
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660 if (!written) |
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|
661 { |
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|
662 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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663 { |
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664 eeprom_write(fridge_delay, fridge_delay); |
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665 } |
| 413 | 666 } |
|
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667 printf_P(PSTR("new fridge delay %hu\n"), fridge_delay); |
| 386 | 668 } |
| 434 | 669 |
| 670 static void | |
| 671 cmd_set_overshoot_factor(char *params) | |
| 672 { | |
| 673 float new_f = atof(params); | |
| 674 if (new_f <= 0 || new_f > 20) | |
| 675 { | |
| 676 printf_P(PSTR("Bad overshoot factor %f\n"), new_f); | |
| 677 return; | |
| 678 } | |
| 679 | |
|
440
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|
680 uint8_t old = overshoot_factor; |
| 434 | 681 |
|
440
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|
682 overshoot_factor = new_f * 10; |
| 434 | 683 bool written = set_initial_eeprom(); |
| 684 if (!written) | |
| 685 { | |
| 686 if (old != overshoot_factor) | |
| 687 { | |
| 688 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) | |
| 689 { | |
| 690 eeprom_write(overshoot_factor, overshoot_factor); | |
| 691 } | |
| 692 } | |
| 693 } | |
| 694 printf_P(PSTR("old factor %.1fº new factor %.1fº\n"), | |
| 695 old / 10.0f, overshoot_factor / 10.0f); | |
| 696 } | |
| 414 | 697 |
| 386 | 698 static void |
| 434 | 699 cmd_set_overshoot_delay(char *params) |
| 700 { | |
| 701 uint16_t new_delay = atoi(params); | |
| 702 if (new_delay < 5) | |
| 703 { | |
| 704 printf_P(PSTR("Bad overshoot delay %d\n"), new_delay); | |
| 705 return; | |
| 706 } | |
| 707 | |
| 708 overshoot_delay = new_delay; | |
| 709 bool written = set_initial_eeprom(); | |
| 710 if (!written) | |
| 711 { | |
| 712 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) | |
| 713 { | |
| 714 eeprom_write(overshoot_delay, overshoot_delay); | |
| 715 } | |
| 716 } | |
| 717 printf_P(PSTR("new overshoot delay %hu\n"), overshoot_delay); | |
| 718 } | |
| 719 | |
| 720 static void | |
| 386 | 721 cmd_awake() |
| 722 { | |
| 723 stay_awake = 1; | |
| 724 printf_P(PSTR("awake\n")); | |
| 319 | 725 } |
| 726 | |
| 318 | 727 static void |
| 306 | 728 read_handler() |
| 729 { | |
| 312 | 730 if (strcmp_P(readbuf, PSTR("fetch")) == 0) |
| 306 | 731 { |
| 732 cmd_fetch(); | |
| 733 } | |
| 312 | 734 else if (strcmp_P(readbuf, PSTR("clear")) == 0) |
| 306 | 735 { |
| 736 cmd_clear(); | |
| 737 } | |
| 312 | 738 else if (strcmp_P(readbuf, PSTR("btoff")) == 0) |
| 306 | 739 { |
| 740 cmd_btoff(); | |
| 741 } | |
| 318 | 742 else if (strcmp_P(readbuf, PSTR("measure")) == 0) |
| 743 { | |
| 744 cmd_measure(); | |
| 745 } | |
| 746 else if (strcmp_P(readbuf, PSTR("sensors")) == 0) | |
| 747 { | |
| 748 cmd_sensors(); | |
| 749 } | |
| 386 | 750 else if (strcmp_P(readbuf, PSTR("get_params")) == 0) |
| 751 { | |
| 752 cmd_get_params(); | |
| 753 } | |
| 389 | 754 else if (strncmp_P(readbuf, PSTR("set_params "), 11) == 0) |
| 386 | 755 { |
| 389 | 756 cmd_set_params(&readbuf[11]); |
| 386 | 757 } |
| 758 else if (strcmp_P(readbuf, PSTR("awake")) == 0) | |
| 759 { | |
| 760 cmd_awake(); | |
| 761 } | |
|
415
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parents:
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diff
changeset
|
762 else if (strncmp_P(readbuf, PSTR("fridge_setpoint "), 16) == 0) |
|
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parents:
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diff
changeset
|
763 { |
|
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parents:
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diff
changeset
|
764 cmd_set_fridge_setpoint(&readbuf[16]); |
|
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parents:
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diff
changeset
|
765 } |
|
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parents:
414
diff
changeset
|
766 else if (strncmp_P(readbuf, PSTR("fridge_diff "), 12) == 0) |
|
83d6574c7889
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diff
changeset
|
767 { |
|
83d6574c7889
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diff
changeset
|
768 cmd_set_fridge_difference(&readbuf[12]); |
|
83d6574c7889
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diff
changeset
|
769 } |
|
83d6574c7889
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parents:
414
diff
changeset
|
770 else if (strncmp_P(readbuf, PSTR("fridge_delay "), 13) == 0) |
|
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parents:
414
diff
changeset
|
771 { |
|
83d6574c7889
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parents:
414
diff
changeset
|
772 cmd_set_fridge_delay(&readbuf[13]); |
|
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Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
773 } |
| 434 | 774 else if (strncmp_P(readbuf, PSTR("overshoot_delay "), 16) == 0) |
| 775 { | |
| 776 cmd_set_overshoot_delay(&readbuf[16]); | |
| 777 } | |
| 778 else if (strncmp_P(readbuf, PSTR("overshoot_factor "), 17) == 0) | |
| 779 { | |
| 780 cmd_set_overshoot_factor(&readbuf[17]); | |
| 781 } | |
|
360
5d86f1182f62
add "awake" and "reset" functions
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358
diff
changeset
|
782 else if (strcmp_P(readbuf, PSTR("reset")) == 0) |
|
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parents:
358
diff
changeset
|
783 { |
|
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parents:
358
diff
changeset
|
784 cmd_reset(); |
|
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diff
changeset
|
785 } |
| 306 | 786 else |
| 787 { | |
| 389 | 788 printf_P(PSTR("Bad command '%s'\n"), readbuf); |
| 306 | 789 } |
| 790 } | |
| 791 | |
|
326
f6b5941b4c34
Untested - calculate crc in uart_putchar
Matt Johnston <matt@ucc.asn.au>
parents:
325
diff
changeset
|
792 ISR(INT0_vect) |
| 324 | 793 { |
|
396
a17a5984116f
print the remainder of timers as well
Matt Johnston <matt@ucc.asn.au>
parents:
395
diff
changeset
|
794 button_pressed = 1; |
|
330
7ac6b8846eea
- some fixes for server code
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parents:
328
diff
changeset
|
795 blink(); |
|
7ac6b8846eea
- some fixes for server code
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parents:
328
diff
changeset
|
796 _delay_ms(100); |
|
7ac6b8846eea
- some fixes for server code
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parents:
328
diff
changeset
|
797 blink(); |
| 324 | 798 } |
| 799 | |
| 800 | |
| 308 | 801 ISR(USART_RX_vect) |
| 306 | 802 { |
| 308 | 803 char c = UDR0; |
|
339
449272fc63a3
- Debug log file for server
Matt Johnston <matt@ucc.asn.au>
parents:
338
diff
changeset
|
804 #ifdef HAVE_UART_ECHO |
| 318 | 805 uart_putchar(c, NULL); |
|
339
449272fc63a3
- Debug log file for server
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338
diff
changeset
|
806 #endif |
|
328
46070aaf29ea
A bit of work on the server python
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parents:
326
diff
changeset
|
807 if (c == '\r' || c == '\n') |
| 306 | 808 { |
|
328
46070aaf29ea
A bit of work on the server python
Matt Johnston <matt@ucc.asn.au>
parents:
326
diff
changeset
|
809 if (readpos > 0) |
|
46070aaf29ea
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parents:
326
diff
changeset
|
810 { |
|
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parents:
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diff
changeset
|
811 readbuf[readpos] = '\0'; |
|
333
298e502fdcd4
Add some web server handling
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parents:
332
diff
changeset
|
812 have_cmd = 1; |
|
328
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parents:
326
diff
changeset
|
813 readpos = 0; |
|
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diff
changeset
|
814 } |
| 306 | 815 } |
| 816 else | |
| 817 { | |
| 818 readbuf[readpos] = c; | |
| 819 readpos++; | |
| 820 if (readpos >= sizeof(readbuf)) | |
| 821 { | |
| 822 readpos = 0; | |
| 823 } | |
| 824 } | |
| 825 } | |
| 826 | |
| 308 | 827 ISR(TIMER2_COMPA_vect) |
| 307 | 828 { |
| 320 | 829 TCNT2 = 0; |
| 386 | 830 measure_count += TICK; |
| 831 comms_count += TICK; | |
|
322
840f51824254
untested, add comms timeout code
Matt Johnston <matt@ucc.asn.au>
parents:
321
diff
changeset
|
832 |
| 386 | 833 clock_epoch += TICK; |
| 323 | 834 |
|
322
840f51824254
untested, add comms timeout code
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parents:
321
diff
changeset
|
835 if (comms_timeout != 0) |
|
840f51824254
untested, add comms timeout code
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parents:
321
diff
changeset
|
836 { |
| 386 | 837 comms_timeout -= TICK; |
|
322
840f51824254
untested, add comms timeout code
Matt Johnston <matt@ucc.asn.au>
parents:
321
diff
changeset
|
838 } |
|
840f51824254
untested, add comms timeout code
Matt Johnston <matt@ucc.asn.au>
parents:
321
diff
changeset
|
839 |
| 386 | 840 if (measure_count >= measure_wake) |
| 307 | 841 { |
|
310
0a64532c1de1
Fill out more main.c structure
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309
diff
changeset
|
842 measure_count = 0; |
| 307 | 843 need_measurement = 1; |
| 844 } | |
|
310
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diff
changeset
|
845 |
| 386 | 846 if (comms_count >= comms_wake) |
| 347 | 847 { |
| 848 comms_count = 0; | |
| 849 need_comms = 1; | |
| 850 } | |
| 307 | 851 } |
| 852 | |
| 853 static void | |
| 854 deep_sleep() | |
| 855 { | |
| 856 // p119 of manual | |
| 308 | 857 OCR2A = SLEEP_COMPARE; |
| 858 loop_until_bit_is_clear(ASSR, OCR2AUB); | |
| 307 | 859 |
| 860 set_sleep_mode(SLEEP_MODE_PWR_SAVE); | |
| 861 sleep_mode(); | |
| 862 } | |
| 863 | |
| 864 static void | |
|
310
0a64532c1de1
Fill out more main.c structure
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309
diff
changeset
|
865 idle_sleep() |
|
0a64532c1de1
Fill out more main.c structure
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309
diff
changeset
|
866 { |
|
0a64532c1de1
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309
diff
changeset
|
867 set_sleep_mode(SLEEP_MODE_IDLE); |
|
0a64532c1de1
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309
diff
changeset
|
868 sleep_mode(); |
|
0a64532c1de1
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diff
changeset
|
869 } |
|
0a64532c1de1
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diff
changeset
|
870 |
| 365 | 871 static uint16_t |
| 872 adc_vcc() | |
|
361
cfcd200c69da
untested code to log voltage and internal temperature
Matt Johnston <matt@ucc.asn.au>
parents:
360
diff
changeset
|
873 { |
|
cfcd200c69da
untested code to log voltage and internal temperature
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parents:
360
diff
changeset
|
874 PRR &= ~_BV(PRADC); |
|
cfcd200c69da
untested code to log voltage and internal temperature
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parents:
360
diff
changeset
|
875 |
| 368 | 876 // /16 prescaler |
|
361
cfcd200c69da
untested code to log voltage and internal temperature
Matt Johnston <matt@ucc.asn.au>
parents:
360
diff
changeset
|
877 ADCSRA = _BV(ADEN) | _BV(ADPS2); |
|
cfcd200c69da
untested code to log voltage and internal temperature
Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
878 |
|
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diff
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|
879 // set to measure 1.1 reference |
| 364 | 880 ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1); |
| 366 | 881 // average a number of samples |
| 882 uint16_t sum = 0; | |
| 883 uint8_t num = 0; | |
| 884 for (uint8_t n = 0; n < 20; n++) | |
| 365 | 885 { |
| 886 ADCSRA |= _BV(ADSC); | |
| 887 loop_until_bit_is_clear(ADCSRA, ADSC); | |
|
361
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|
888 |
| 366 | 889 uint8_t low_11 = ADCL; |
| 890 uint8_t high_11 = ADCH; | |
| 891 uint16_t val = low_11 + (high_11 << 8); | |
| 312 | 892 |
| 366 | 893 if (n >= 4) |
| 894 { | |
| 895 sum += val; | |
| 896 num++; | |
| 897 } | |
| 898 } | |
| 899 ADCSRA = 0; | |
| 900 PRR |= _BV(PRADC); | |
| 312 | 901 |
| 386 | 902 //float res_volts = 1.1 * 1024 * num / sum; |
| 903 //return 1000 * res_volts; | |
| 904 return ((uint32_t)1100*1024*num) / sum; | |
| 312 | 905 } |
| 906 | |
|
310
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diff
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|
907 static void |
| 414 | 908 do_fridge() |
| 909 { | |
| 910 struct epoch_ticks now; | |
| 911 get_epoch_ticks(&now); | |
|
428
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|
912 uint32_t off_time = now.ticks - fridge_off_clock.ticks; |
|
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|
913 bool wort_valid = last_wort != DS18X20_INVALID_DECICELSIUS; |
|
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|
914 bool fridge_valid = last_fridge != DS18X20_INVALID_DECICELSIUS; |
|
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|
915 |
|
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|
916 int16_t wort_max = fridge_setpoint + fridge_difference; |
|
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|
917 int16_t wort_min = fridge_setpoint; |
|
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|
918 |
|
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|
919 // the fridge min/max only apply if the wort sensor is broken |
|
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920 int16_t fridge_min = fridge_setpoint - FRIDGE_AIR_MIN_RANGE; |
|
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|
921 int16_t fridge_max = fridge_setpoint + FRIDGE_AIR_MAX_RANGE; |
|
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922 |
|
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923 uint8_t fridge_on = PORT_FRIDGE & _BV(PIN_FRIDGE); |
|
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|
924 printf_P(PSTR("last_wort %hd (%hd, %hd), last_fridge %hd (%hd, %hd), setpoint %hd, diff %hd, fridge_on %hhu\n"), |
|
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|
925 last_wort, wort_min, wort_max, |
|
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|
926 last_fridge, fridge_min, fridge_max, |
|
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|
927 fridge_setpoint, fridge_difference, fridge_on); |
|
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928 |
|
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|
929 if (off_time < fridge_delay) |
| 414 | 930 { |
|
417
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|
931 printf_P(PSTR("waiting for fridge delay current %hu, wait %hu\n"), |
|
420
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|
932 off_time, fridge_delay); |
| 414 | 933 return; |
| 934 } | |
| 935 | |
|
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|
936 // handle failure of the wort sensor. if it is a short (intermittent?) |
|
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937 // failure we wait until it has been broken for a period of time |
|
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938 // (WORT_INVALID_TIME) before doing anything. |
|
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|
939 if (wort_valid) |
|
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940 { |
|
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|
941 wort_valid_clock = now; |
|
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942 } |
|
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943 else |
|
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|
944 { |
|
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|
945 printf_P(PSTR("wort sensor is invalid\n")); |
|
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946 uint32_t invalid_time = now.ticks - wort_valid_clock.ticks; |
|
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|
947 if (invalid_time < WORT_INVALID_TIME) |
|
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|
948 { |
|
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|
949 printf("only been invalid for %ld, waiting\n", invalid_time); |
|
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|
950 return; |
|
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|
951 } |
|
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|
952 } |
|
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|
953 |
|
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|
954 if (!fridge_valid) |
|
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|
955 { |
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|
956 printf_P(PSTR("fridge sensor is invalid\n")); |
|
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|
957 } |
| 414 | 958 |
| 959 if (fridge_on) | |
| 960 { | |
|
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961 bool turn_off = false; |
|
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|
962 uint16_t on_time = now.ticks - fridge_on_clock.ticks; |
|
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|
963 |
|
428
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|
964 uint16_t overshoot = 0; |
| 434 | 965 if (on_time > overshoot_delay) |
|
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|
966 { |
| 434 | 967 overshoot = overshoot_factor * MIN(OVERSHOOT_MAX_DIV, on_time) / OVERSHOOT_MAX_DIV; |
|
428
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|
968 } |
|
427
7c2efec9cd51
fix stupid bugs - lack of PSTR, MIN not MAX
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diff
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|
969 |
|
7c2efec9cd51
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|
970 printf_P(PSTR("on_time %hu, overshoot %hu\n"), on_time, overshoot); |
|
420
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|
971 |
|
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|
972 // wort has cooled enough. will probably cool a bit more by itself |
|
428
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|
973 if (wort_valid) |
|
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|
974 { |
|
428
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|
975 if ((last_wort - overshoot) < fridge_setpoint) |
|
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|
976 { |
|
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|
977 printf_P(PSTR("wort has cooled enough, overshoot %hu on_time %hu\n"), overshoot, on_time); |
|
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|
978 turn_off = true; |
|
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|
979 } |
|
420
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|
980 } |
|
428
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|
981 else |
|
420
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|
982 { |
|
428
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|
983 if (fridge_valid && last_fridge < fridge_min) |
|
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|
984 { |
|
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|
985 printf_P(PSTR("fridge off fallback\n")); |
|
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|
986 turn_off = true; |
|
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|
987 } |
|
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|
988 } |
|
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|
989 |
|
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|
990 if (turn_off) |
| 414 | 991 { |
| 992 // too cold, turn off | |
|
417
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|
993 printf_P(PSTR("Turning fridge off\n")); |
| 414 | 994 PORT_FRIDGE &= ~_BV(PIN_FRIDGE); |
| 995 fridge_off_clock = now; | |
| 996 } | |
| 997 } | |
| 998 else | |
| 999 { | |
|
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|
1000 bool turn_on = false; |
|
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|
1001 |
|
428
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|
1002 if (wort_valid) |
| 426 | 1003 { |
|
428
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|
1004 if (last_wort >= wort_max) |
|
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|
1005 { |
|
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|
1006 printf_P(PSTR("wort is too hot\n")); |
|
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|
1007 turn_on = true; |
|
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|
1008 } |
| 426 | 1009 } |
|
428
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|
1010 else |
|
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|
1011 { |
|
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1012 if (fridge_valid && last_fridge >= fridge_max) |
|
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|
1013 { |
|
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|
1014 printf_P(PSTR("fridge on fallback\n")); |
|
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|
1015 turn_on = true; |
|
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|
1016 } |
|
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|
1017 } |
|
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|
1018 |
|
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|
1019 if (turn_on) |
| 414 | 1020 { |
| 1021 // too hot, turn on | |
|
417
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|
1022 printf_P(PSTR("Turning fridge on\n")); |
| 414 | 1023 PORT_FRIDGE |= _BV(PIN_FRIDGE); |
|
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1024 fridge_on_clock = now; |
| 414 | 1025 } |
| 1026 } | |
| 1027 } | |
| 1028 | |
| 1029 static void | |
| 307 | 1030 do_measurement() |
| 1031 { | |
|
381
83c83014e5e3
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368
diff
changeset
|
1032 blink(); |
|
83c83014e5e3
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|
1033 |
|
396
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|
1034 /* Take the timer here since deep_sleep() below could take 6 seconds */ |
|
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|
1035 get_epoch_ticks(&last_measurement_clock); |
|
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|
1036 if (n_measurements == 0) |
|
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|
1037 { |
|
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|
1038 first_measurement_clock = last_measurement_clock; |
|
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|
1039 } |
|
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1040 |
|
361
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1041 simple_ds18b20_start_meas(NULL); |
|
433
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1042 _delay_ms(DS18B20_TCONV_12BIT); |
| 319 | 1043 |
| 386 | 1044 if (n_measurements == max_measurements) |
| 319 | 1045 { |
| 1046 n_measurements = 0; | |
| 1047 } | |
| 312 | 1048 |
| 386 | 1049 for (uint8_t s = 0; s < n_sensors; s++) |
| 319 | 1050 { |
|
381
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1051 uint16_t reading; |
| 386 | 1052 uint8_t ret = simple_ds18b20_read_raw(sensor_id[s], &reading); |
| 1053 if (ret != DS18X20_OK) | |
| 319 | 1054 { |
| 386 | 1055 reading = VALUE_BROKEN; |
| 319 | 1056 } |
| 386 | 1057 set_measurement(s, n_measurements, reading); |
| 414 | 1058 |
| 1059 if (memcmp(sensor_id[s], fridge_id, sizeof(fridge_id)) == 0) | |
| 1060 { | |
|
420
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1061 last_fridge = ds18b20_raw16_to_decicelsius(reading); |
| 414 | 1062 } |
| 1063 if (memcmp(sensor_id[s], wort_id, sizeof(wort_id)) == 0) | |
| 1064 { | |
|
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1065 last_wort = ds18b20_raw16_to_decicelsius(reading); |
| 414 | 1066 } |
| 319 | 1067 } |
|
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1068 |
| 320 | 1069 n_measurements++; |
| 307 | 1070 } |
| 1071 | |
|
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1072 static void |
|
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1073 do_comms() |
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1074 { |
|
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1075 get_epoch_ticks(&last_comms_clock); |
|
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1076 |
| 347 | 1077 // turn on bluetooth |
|
330
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1078 set_aux_power(1); |
|
395
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1079 // avoid receiving rubbish, perhaps |
|
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1080 _delay_ms(50); |
| 313 | 1081 uart_on(); |
| 347 | 1082 |
| 1083 // write sd card here? same 3.3v regulator... | |
| 1084 | |
| 386 | 1085 for (comms_timeout = wake_secs; |
| 1086 comms_timeout > 0 || stay_awake; | |
| 1087 ) | |
| 347 | 1088 { |
| 312 | 1089 if (need_measurement) |
| 1090 { | |
| 320 | 1091 need_measurement = 0; |
| 312 | 1092 do_measurement(); |
| 414 | 1093 do_fridge(); |
| 349 | 1094 continue; |
| 312 | 1095 } |
| 1096 | |
|
333
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1097 if (have_cmd) |
|
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|
1098 { |
|
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|
1099 have_cmd = 0; |
|
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|
1100 read_handler(); |
| 349 | 1101 continue; |
|
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|
1102 } |
|
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|
1103 |
|
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diff
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|
1104 // wait for commands from the master |
| 347 | 1105 idle_sleep(); |
| 1106 } | |
|
310
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1107 |
| 312 | 1108 uart_off(); |
|
352
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|
1109 // in case bluetooth takes time to flush |
|
99f8b97a9449
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|
1110 _delay_ms(100); |
|
322
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|
1111 set_aux_power(0); |
|
310
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|
1112 } |
|
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1113 |
| 313 | 1114 static void |
| 1115 blink() | |
| 1116 { | |
| 1117 PORT_LED &= ~_BV(PIN_LED); | |
| 315 | 1118 _delay_ms(1); |
| 313 | 1119 PORT_LED |= _BV(PIN_LED); |
| 1120 } | |
| 1121 | |
| 1122 static void | |
| 1123 long_delay(int ms) | |
| 1124 { | |
| 1125 int iter = ms / 100; | |
| 1126 | |
| 1127 for (int i = 0; i < iter; i++) | |
| 1128 { | |
| 1129 _delay_ms(100); | |
| 1130 } | |
| 1131 } | |
| 1132 | |
| 314 | 1133 ISR(BADISR_vect) |
| 1134 { | |
| 320 | 1135 //uart_on(); |
| 314 | 1136 printf_P(PSTR("Bad interrupt\n")); |
| 1137 } | |
| 1138 | |
| 306 | 1139 int main(void) |
| 1140 { | |
|
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|
1141 setup_chip(); |
|
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|
1142 blink(); |
| 315 | 1143 |
|
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|
1144 set_aux_power(0); |
| 313 | 1145 |
| 312 | 1146 stdout = &mystdout; |
| 313 | 1147 uart_on(); |
| 1148 | |
|
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diff
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|
1149 printf(PSTR("Started.\n")); |
| 319 | 1150 |
| 386 | 1151 load_params(); |
| 319 | 1152 |
|
382
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don't store sensors in eeprom, scan at startup instead
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parents:
381
diff
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|
1153 init_sensors(); |
|
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|
1154 |
| 314 | 1155 uart_off(); |
| 306 | 1156 |
| 312 | 1157 // turn off everything except timer2 |
|
352
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diff
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|
1158 PRR = _BV(PRTWI) | _BV(PRTIM0) | _BV(PRTIM1) | _BV(PRSPI) | _BV(PRUSART0) | _BV(PRADC); |
| 314 | 1159 |
|
322
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|
1160 setup_tick_counter(); |
|
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|
1161 |
| 318 | 1162 sei(); |
| 314 | 1163 |
|
331
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diff
changeset
|
1164 need_comms = 1; |
|
341
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diff
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|
1165 need_measurement = 1; |
|
331
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|
1166 |
| 416 | 1167 stay_awake = 1; |
| 1168 | |
|
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|
1169 for(;;) |
|
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|
1170 { |
|
396
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diff
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|
1171 if (button_pressed) |
|
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diff
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|
1172 { |
|
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diff
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|
1173 // debounce |
|
a17a5984116f
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diff
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|
1174 _delay_ms(200); |
|
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|
1175 need_comms = 1; |
|
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parents:
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diff
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|
1176 comms_timeout = wake_secs; |
|
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|
1177 button_pressed = 0; |
| 347 | 1178 continue; |
| 307 | 1179 } |
|
310
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diff
changeset
|
1180 |
|
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diff
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|
1181 if (need_comms) |
|
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|
1182 { |
|
322
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parents:
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diff
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|
1183 need_comms = 0; |
|
310
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diff
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|
1184 do_comms(); |
| 347 | 1185 continue; |
|
310
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|
1186 } |
|
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|
1187 |
| 402 | 1188 if (need_measurement) |
| 1189 { | |
| 1190 need_measurement = 0; | |
| 1191 do_measurement(); | |
| 414 | 1192 do_fridge(); |
| 402 | 1193 continue; |
| 1194 } | |
| 1195 | |
| 347 | 1196 deep_sleep(); |
| 306 | 1197 } |
| 318 | 1198 |
| 306 | 1199 return 0; /* never reached */ |
| 1200 } |