Mercurial > templog
annotate main.c @ 141:4755e6f9a5b8
python raspberry pi rewrite
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Mon, 19 Nov 2012 22:46:34 +0800 |
| parents | 08adc1fa02e8 |
| children | 9091411be841 |
| rev | line source |
|---|---|
| 0 | 1 #include <stdio.h> |
| 2 #include <string.h> | |
| 13 | 3 #include <stddef.h> |
|
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4 #include <stdbool.h> |
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5 #include <stdlib.h> |
| 1 | 6 #include <avr/io.h> |
| 7 #include <avr/interrupt.h> | |
| 8 #include <avr/sleep.h> | |
| 7 | 9 #include <util/delay.h> |
| 6 | 10 #include <avr/pgmspace.h> |
| 13 | 11 #include <avr/eeprom.h> |
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12 #include <avr/wdt.h> |
| 59 | 13 #include <util/atomic.h> |
| 0 | 14 #include <util/crc16.h> |
| 15 | |
| 12 | 16 #include "simple_ds18b20.h" |
| 13 | 17 #include "onewire.h" |
| 3 | 18 |
| 0 | 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 |
| 80 | 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 |
| 13 | 37 |
| 135 | 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 |
| 10 | 44 #define BAUD 19200 |
| 7 | 45 #define UBRR ((F_CPU)/8/(BAUD)-1) |
| 46 | |
| 47 #define PORT_LED PORTC | |
| 48 #define DDR_LED DDRC | |
| 49 #define PIN_LED PC4 | |
| 1 | 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 |
| 115 | 55 #define PORT_FRIDGE PORTD |
| 56 #define DDR_FRIDGE DDRD | |
| 57 #define PIN_FRIDGE PD6 | |
| 58 | |
| 80 | 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 |
| 80 | 62 |
| 63 // each sensor slot uses 8 bytes | |
| 64 #define MAX_SENSORS 6 | |
| 6 | 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 |
| 33 | 69 // #define HAVE_UART_ECHO |
| 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 |
| 80 | 80 // eeprom-settable parameters. all timeouts should |
| 81 // be a multiple of TICK (6 seconds probably) | |
| 115 | 82 static uint16_t measure_wake = 61; // not a divisor of comms_wake |
| 83 static uint16_t comms_wake = 600; | |
| 80 | 84 static uint8_t wake_secs = 30; |
| 115 | 85 // decidegrees |
| 86 static int16_t fridge_setpoint = 180; // 18.0ºC | |
| 136 | 87 static uint16_t fridge_difference = 3; // 0.3ºC |
| 115 | 88 static uint16_t fridge_delay = 600; // seconds |
| 114 | 89 |
| 135 | 90 static uint16_t overshoot_delay = 720; // 12 mins |
| 91 static uint8_t overshoot_factor = 10; // 1.0ºC | |
| 92 | |
| 59 | 93 // ---- Atomic guards required accessing these variables |
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94 // clock_epoch in seconds |
| 59 | 95 static uint32_t clock_epoch; |
| 96 static uint16_t comms_count; | |
| 97 static uint16_t measure_count; | |
| 98 // ---- End atomic guards required | |
| 99 | |
| 17 | 100 static uint16_t n_measurements; |
| 59 | 101 |
| 80 | 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; |
| 59 | 112 |
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113 // boolean flags |
| 17 | 114 static uint8_t need_measurement; |
| 115 static uint8_t need_comms; | |
| 40 | 116 static uint8_t uart_enabled; |
| 80 | 117 static uint8_t stay_awake; |
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118 static uint8_t button_pressed; |
| 1 | 119 |
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120 // counts down from WAKE_SECS to 0, goes to deep sleep when hits 0 |
| 17 | 121 static uint8_t comms_timeout; |
| 1 | 122 |
| 17 | 123 static uint8_t readpos; |
| 0 | 124 static char readbuf[30]; |
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125 static uint8_t have_cmd; |
| 0 | 126 |
| 80 | 127 static uint8_t n_sensors; |
| 128 static uint8_t sensor_id[MAX_SENSORS][ID_LEN]; | |
| 129 | |
| 115 | 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}; |
| 80 | 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 |
| 13 | 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 { | |
| 160 uint16_t magic; | |
| 80 | 161 uint16_t measure_wake; |
| 162 uint16_t comms_wake; | |
| 163 uint8_t wake_secs; | |
| 114 | 164 |
| 115 | 165 int16_t fridge_setpoint; // decidegrees |
| 136 | 166 uint16_t fridge_difference; // decidegrees |
| 115 | 167 uint16_t fridge_delay; |
| 114 | 168 |
| 135 | 169 uint16_t overshoot_delay; |
| 170 uint8_t overshoot_factor; // decidegrees | |
| 171 | |
| 115 | 172 #if 0 |
| 173 static uint8_t wort_id[ID_LEN]; | |
| 174 static uint8_t fridge_id[ID_LEN]; | |
| 175 #endif | |
| 176 }; | |
| 114 | 177 |
| 115 | 178 static const uint8_t fridge_id[ID_LEN] = |
| 179 {0x28,0xCE,0xB2,0x1A,0x03,0x00,0x00,0x99}; | |
| 180 static const uint8_t wort_id[ID_LEN] = | |
| 181 {0x28,0x49,0xBC,0x1A,0x03,0x00,0x00,0x54}; | |
| 13 | 182 |
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183 static void deep_sleep(); |
| 1 | 184 |
| 117 | 185 // 0 or 1 |
| 186 static uint8_t | |
| 187 is_fridge_on() | |
| 188 { | |
| 189 if (PORT_FRIDGE & _BV(PIN_FRIDGE)) | |
| 190 { | |
| 191 return 1; | |
| 192 } | |
| 193 else | |
| 194 { | |
| 195 return 0; | |
| 196 } | |
| 197 } | |
| 198 | |
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199 // Very first setup |
| 18 | 200 static void |
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201 setup_chip() |
| 18 | 202 { |
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203 cli(); |
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204 |
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205 // stop watchdog timer (might have been used to cause a reset) |
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206 wdt_reset(); |
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207 MCUSR &= ~_BV(WDRF); |
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208 WDTCSR |= _BV(WDCE) | _BV(WDE); |
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209 WDTCSR = 0; |
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210 |
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211 // Set clock to 2mhz |
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212 CLKPR = _BV(CLKPCE); |
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213 // divide by 4 |
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214 CLKPR = _BV(CLKPS1); |
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215 |
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216 // enable pullups |
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217 PORTB = 0xff; // XXX change when using SPI |
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218 PORTD = 0xff; |
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219 PORTC = 0xff; |
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220 |
| 19 | 221 // 3.3v power for bluetooth and SD |
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222 DDR_LED |= _BV(PIN_LED); |
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223 DDR_SHDN |= _BV(PIN_SHDN); |
| 19 | 224 |
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225 PORT_FRIDGE &= ~_BV(PIN_FRIDGE); |
| 115 | 226 DDR_FRIDGE |= _BV(PIN_FRIDGE); |
| 227 | |
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228 // set pullup |
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229 PORTD |= _BV(PD2); |
| 41 | 230 // INT0 setup |
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231 EICRA = (1<<ISC01); // falling edge - data sheet says it won't work? |
| 41 | 232 EIMSK = _BV(INT0); |
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233 |
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234 // comparator disable |
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235 ACSR = _BV(ACD); |
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236 |
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237 // disable adc pin input buffers |
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238 DIDR0 = 0x3F; // acd0-adc5 |
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239 DIDR1 = (1<<AIN1D)|(1<<AIN0D); // ain0/ain1 |
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240 |
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241 sei(); |
| 18 | 242 } |
| 243 | |
|
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244 static void |
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245 set_aux_power(uint8_t on) |
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246 { |
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247 if (on) |
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248 { |
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249 PORT_SHDN &= ~_BV(PIN_SHDN); |
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250 } |
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251 else |
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252 { |
| 44 | 253 PORT_SHDN |= _BV(PIN_SHDN); |
|
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254 } |
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255 } |
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256 |
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257 static void |
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258 get_epoch_ticks(struct epoch_ticks *t) |
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259 { |
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260 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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261 { |
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262 t->ticks = clock_epoch; |
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263 t->rem = TCNT2; |
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264 } |
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265 } |
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266 |
| 80 | 267 static void |
| 268 set_measurement(uint8_t sensor, uint16_t measurement, uint16_t reading) | |
| 269 { | |
| 270 measurements[sensor*max_measurements + measurement] = reading; | |
| 271 } | |
| 272 | |
| 273 static uint16_t | |
| 274 get_measurement(uint8_t sensor, uint16_t measurement) | |
| 275 { | |
| 276 return measurements[sensor*max_measurements + measurement]; | |
| 277 } | |
| 278 | |
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279 static void |
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280 setup_tick_counter() |
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281 { |
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282 // set up counter2. |
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283 // COM21 COM20 Set OC2 on Compare Match (p116) |
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284 // WGM21 Clear counter on compare |
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285 //TCCR2A = _BV(COM2A1) | _BV(COM2A0) | _BV(WGM21); |
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286 // toggle on match |
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287 TCCR2A = _BV(COM2A0); |
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288 // CS22 CS21 CS20 clk/1024 |
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289 TCCR2B = _BV(CS22) | _BV(CS21) | _BV(CS20); |
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290 // set async mode |
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291 ASSR |= _BV(AS2); |
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292 TCNT2 = 0; |
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293 OCR2A = SLEEP_COMPARE; |
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294 // interrupt |
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295 TIMSK2 = _BV(OCIE2A); |
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296 } |
| 18 | 297 |
| 0 | 298 static void |
| 7 | 299 uart_on() |
| 0 | 300 { |
| 8 | 301 // Power reduction register |
|
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302 PRR &= ~_BV(PRUSART0); |
| 8 | 303 |
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304 // All of this needs to be done each time after turning off the PRR |
| 0 | 305 // baud rate |
| 7 | 306 UBRR0H = (unsigned char)(UBRR >> 8); |
| 307 UBRR0L = (unsigned char)UBRR; | |
| 308 // set 2x clock, improves accuracy of UBRR | |
| 309 UCSR0A |= _BV(U2X0); | |
| 6 | 310 UCSR0B = _BV(RXCIE0) | _BV(RXEN0) | _BV(TXEN0); |
| 0 | 311 //8N1 |
| 7 | 312 UCSR0C = _BV(UCSZ01) | _BV(UCSZ00); |
| 41 | 313 uart_enabled = 1; |
| 6 | 314 } |
| 315 | |
| 316 static void | |
| 317 uart_off() | |
| 318 { | |
|
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319 // Turn off interrupts and disable tx/rx |
| 6 | 320 UCSR0B = 0; |
| 41 | 321 uart_enabled = 0; |
| 6 | 322 |
| 323 // Power reduction register | |
|
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324 PRR |= _BV(PRUSART0); |
| 0 | 325 } |
| 326 | |
| 10 | 327 int |
| 0 | 328 uart_putchar(char c, FILE *stream) |
| 329 { | |
| 41 | 330 if (!uart_enabled) |
| 331 { | |
| 332 return EOF; | |
| 333 } | |
|
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334 // XXX could perhaps sleep in the loop for power. |
| 8 | 335 if (c == '\n') |
| 336 { | |
| 10 | 337 loop_until_bit_is_set(UCSR0A, UDRE0); |
|
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338 UDR0 = '\r'; |
| 8 | 339 } |
| 2 | 340 loop_until_bit_is_set(UCSR0A, UDRE0); |
| 341 UDR0 = c; | |
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342 if (stream == crc_stdout) |
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343 { |
|
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344 crc_out = _crc_ccitt_update(crc_out, c); |
|
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345 } |
| 10 | 346 if (c == '\r') |
| 347 { | |
| 348 loop_until_bit_is_set(UCSR0A, UDRE0); | |
|
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349 UDR0 = '\n'; |
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350 if (stream == crc_stdout) |
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351 { |
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352 crc_out = _crc_ccitt_update(crc_out, '\n'); |
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353 } |
| 10 | 354 } |
| 40 | 355 return (unsigned char)c; |
| 0 | 356 } |
| 357 | |
| 358 static void | |
| 359 cmd_fetch() | |
| 360 { | |
|
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361 crc_out = 0; |
|
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362 |
|
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363 fprintf_P(crc_stdout, PSTR("START\n")); |
| 59 | 364 { |
|
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365 struct epoch_ticks now; |
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366 get_epoch_ticks(&now); |
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367 fprintf_P(crc_stdout, PSTR("now=%lu\n"), now.ticks); |
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368 fprintf_P(crc_stdout, PSTR("now_rem=%hhu\n"), now.rem); |
| 59 | 369 } |
|
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370 fprintf_P(crc_stdout, PSTR("time_step=%hu\n"), measure_wake); |
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371 fprintf_P(crc_stdout, PSTR("first_time=%lu\n"), first_measurement_clock.ticks); |
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372 fprintf_P(crc_stdout, PSTR("first_time_rem=%hhu\n"), first_measurement_clock.rem); |
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373 fprintf_P(crc_stdout, PSTR("last_time=%lu\n"), last_measurement_clock.ticks); |
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374 fprintf_P(crc_stdout, PSTR("last_time_rem=%hhu\n"), last_measurement_clock.rem); |
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375 fprintf_P(crc_stdout, PSTR("comms_time=%lu\n"), last_comms_clock.ticks); |
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376 fprintf_P(crc_stdout, PSTR("comms_time_rem=%hhu\n"), last_comms_clock.rem); |
|
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377 fprintf_P(crc_stdout, PSTR("voltage=%hu\n"), adc_vcc()); |
| 87 | 378 fprintf_P(crc_stdout, PSTR("measure=%hu\n"), measure_wake); |
| 379 fprintf_P(crc_stdout, PSTR("comms=%hu\n"), comms_wake); | |
| 380 fprintf_P(crc_stdout, PSTR("wake=%hhu\n"), wake_secs); | |
| 115 | 381 fprintf_P(crc_stdout, PSTR("fridge=%.1f\n"), fridge_setpoint/10.0); |
| 382 fprintf_P(crc_stdout, PSTR("fridge_diff=%.1f\n"), fridge_difference/10.0); | |
| 383 fprintf_P(crc_stdout, PSTR("fridge_delay=%hu\n"), fridge_delay); | |
| 135 | 384 fprintf_P(crc_stdout, PSTR("overshoot_factor=%.1f\n"), overshoot_factor/10.0); |
| 385 fprintf_P(crc_stdout, PSTR("overshoot_delay=%hu\n"), overshoot_delay); | |
| 117 | 386 fprintf_P(crc_stdout, PSTR("fridge_status=%hhu\n"), is_fridge_on()); |
|
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387 fprintf_P(crc_stdout, PSTR("fridge_last_on=%lu\n"), fridge_on_clock.ticks); |
|
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388 fprintf_P(crc_stdout, PSTR("fridge_last_off=%lu\n"), fridge_off_clock.ticks); |
|
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389 fprintf_P(crc_stdout, PSTR("last_fridge=%hu\n"), last_fridge); |
|
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390 fprintf_P(crc_stdout, PSTR("last_wort=%hu\n"), last_wort); |
|
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391 fprintf_P(crc_stdout, PSTR("tick_secs=%d\n"), TICK); |
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392 fprintf_P(crc_stdout, PSTR("tick_wake=%d\n"), SLEEP_COMPARE); |
| 87 | 393 fprintf_P(crc_stdout, PSTR("maxsens=%hhu\n"), MAX_SENSORS); |
| 394 fprintf_P(crc_stdout, PSTR("totalmeas=%hu\n"), TOTAL_MEASUREMENTS); | |
|
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395 fprintf_P(crc_stdout, PSTR("sensors=%hhu\n"), n_sensors); |
|
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396 for (uint8_t s = 0; s < n_sensors; s++) |
|
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397 { |
|
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398 fprintf_P(crc_stdout, PSTR("sensor_id%hhu="), s); |
|
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399 printhex(sensor_id[s], ID_LEN, crc_stdout); |
|
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400 fputc('\n', crc_stdout); |
|
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401 } |
|
36
a670a67ba489
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diff
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|
402 fprintf_P(crc_stdout, PSTR("measurements=%hu\n"), n_measurements); |
| 14 | 403 for (uint16_t n = 0; n < n_measurements; n++) |
| 0 | 404 { |
|
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405 fprintf_P(crc_stdout, PSTR("meas%hu="), n); |
|
15
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406 for (uint8_t s = 0; s < n_sensors; s++) |
| 13 | 407 { |
| 80 | 408 fprintf_P(crc_stdout, PSTR(" %04hx"), get_measurement(s, n)); |
| 13 | 409 } |
|
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410 fputc('\n', crc_stdout); |
| 0 | 411 } |
|
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412 fprintf_P(crc_stdout, PSTR("END\n")); |
|
25
2943f62c8e62
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diff
changeset
|
413 fprintf_P(stdout, PSTR("CRC=%hu\n"), crc_out); |
| 0 | 414 } |
| 415 | |
| 416 static void | |
| 417 cmd_clear() | |
| 418 { | |
| 7 | 419 n_measurements = 0; |
| 32 | 420 printf_P(PSTR("cleared\n")); |
| 0 | 421 } |
| 422 | |
| 423 static void | |
| 424 cmd_btoff() | |
| 425 { | |
|
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diff
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|
426 uint8_t rem; |
|
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427 uint16_t count_copy; |
| 59 | 428 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
| 429 { | |
|
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430 count_copy = comms_count; |
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431 rem = TCNT2; |
| 59 | 432 } |
|
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433 printf_P(PSTR("next_wake=%hu,"), comms_wake-count_copy); |
|
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434 printf_P(PSTR("rem=%hhu,"), rem); |
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435 printf_P(PSTR("tick_secs=%hhu,"), TICK); |
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436 printf_P(PSTR("tick_wake=%hhu\n"), SLEEP_COMPARE); |
|
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437 _delay_ms(100); |
|
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438 comms_timeout = 0; |
| 117 | 439 stay_awake = 0; |
| 0 | 440 } |
| 441 | |
| 442 static void | |
|
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443 cmd_reset() |
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444 { |
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445 printf_P(PSTR("reset\n")); |
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446 _delay_ms(100); |
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447 cli(); // disable interrupts |
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448 wdt_enable(WDTO_15MS); // enable watchdog |
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449 while(1); // wait for watchdog to reset processor |
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450 } |
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451 |
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452 static void |
| 12 | 453 cmd_measure() |
| 454 { | |
| 33 | 455 printf_P(PSTR("measuring\n")); |
| 12 | 456 need_measurement = 1; |
| 457 } | |
| 458 | |
| 459 static void | |
| 460 cmd_sensors() | |
| 461 { | |
| 462 uint8_t ret = simple_ds18b20_start_meas(NULL); | |
|
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463 printf_P(PSTR("All sensors, ret %hhu, waiting...\n"), ret); |
| 14 | 464 long_delay(DS18B20_TCONV_12BIT); |
| 12 | 465 simple_ds18b20_read_all(); |
| 466 } | |
| 467 | |
| 13 | 468 static void |
|
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469 init_sensors() |
| 13 | 470 { |
| 41 | 471 uint8_t id[OW_ROMCODE_SIZE]; |
|
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472 printf_P(PSTR("init sensors\n")); |
| 13 | 473 ow_reset(); |
| 41 | 474 for( uint8_t diff = OW_SEARCH_FIRST; diff != OW_LAST_DEVICE; ) |
| 475 { | |
| 476 diff = ow_rom_search( diff, &id[0] ); | |
| 477 if( diff == OW_PRESENCE_ERR ) { | |
| 478 printf_P( PSTR("No Sensor found\r") ); | |
| 479 return; | |
| 480 } | |
| 481 | |
| 482 if( diff == OW_DATA_ERR ) { | |
| 483 printf_P( PSTR("Bus Error\r") ); | |
| 484 return; | |
| 485 } | |
|
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486 |
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487 if (n_sensors < MAX_SENSORS) |
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488 { |
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489 memcpy(sensor_id[n_sensors], id, ID_LEN); |
|
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490 printf_P(PSTR("Added sensor %hhu : "), n_sensors); |
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491 printhex(id, ID_LEN, stdout); |
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492 putchar('\n'); |
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493 n_sensors++; |
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494 } |
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495 else |
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496 { |
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497 printf_P(PSTR("Too many sensors\n")); |
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498 } |
| 13 | 499 } |
| 80 | 500 |
| 501 max_measurements = TOTAL_MEASUREMENTS / n_sensors; | |
| 502 } | |
| 503 | |
| 504 static void | |
| 505 load_params() | |
| 506 { | |
| 507 uint16_t magic; | |
| 508 eeprom_read(magic, magic); | |
| 509 if (magic == EXPECT_MAGIC) | |
| 510 { | |
| 511 eeprom_read(measure_wake, measure_wake); | |
| 512 eeprom_read(comms_wake, comms_wake); | |
| 513 eeprom_read(wake_secs, wake_secs); | |
| 115 | 514 eeprom_read(fridge_setpoint, fridge_setpoint); |
| 515 eeprom_read(fridge_difference, fridge_difference); | |
| 516 eeprom_read(fridge_delay, fridge_delay); | |
| 135 | 517 eeprom_read(overshoot_delay, overshoot_delay); |
| 518 eeprom_read(overshoot_factor, overshoot_factor); | |
| 80 | 519 } |
| 520 } | |
| 521 | |
| 522 static void | |
| 523 cmd_get_params() | |
| 524 { | |
|
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525 printf_P(PSTR("measure %hu\n"), measure_wake); |
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526 printf_P(PSTR("comms %hu\n"), comms_wake); |
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527 printf_P(PSTR("wake %hhu\n"), wake_secs); |
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528 printf_P(PSTR("tick %d\n"), TICK); |
|
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529 printf_P(PSTR("fridge %.1fº\n"), fridge_setpoint / 10.0f); |
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530 printf_P(PSTR("fridge difference %.1fº\n"), fridge_difference / 10.0f); |
| 115 | 531 printf_P(PSTR("fridge_delay %hu\n"), fridge_delay); |
| 135 | 532 printf_P(PSTR("overshoot factor %.1fº\n"), overshoot_factor / 10.0f); |
| 533 printf_P(PSTR("overshoot delay %hu\n"), overshoot_delay); | |
|
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534 printf_P(PSTR("sensors %hhu (%hhu)\n"), |
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535 n_sensors, MAX_SENSORS); |
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536 printf_P(PSTR("meas %hu (%hu)\n"), |
| 80 | 537 max_measurements, TOTAL_MEASUREMENTS); |
| 13 | 538 } |
| 539 | |
| 540 static void | |
| 80 | 541 cmd_set_params(const char *params) |
| 13 | 542 { |
| 80 | 543 uint16_t new_measure_wake; |
| 544 uint16_t new_comms_wake; | |
| 545 uint8_t new_wake_secs; | |
|
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546 int ret = sscanf_P(params, PSTR("%hu %hu %hhu"), |
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547 &new_measure_wake, &new_comms_wake, &new_wake_secs); |
| 80 | 548 |
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549 if (ret != 3) |
| 13 | 550 { |
| 80 | 551 printf_P(PSTR("Bad values\n")); |
| 552 } | |
| 553 else | |
| 554 { | |
| 115 | 555 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
| 556 { | |
| 557 eeprom_write(new_measure_wake, measure_wake); | |
| 558 eeprom_write(new_comms_wake, comms_wake); | |
| 559 eeprom_write(new_wake_secs, wake_secs); | |
| 560 uint16_t magic = EXPECT_MAGIC; | |
| 561 eeprom_write(magic, magic); | |
| 562 } | |
| 80 | 563 printf_P(PSTR("set_params for next boot\n")); |
|
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564 printf_P(PSTR("measure %hu comms %hu wake %hhu\n"), |
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565 new_measure_wake, new_comms_wake, new_wake_secs); |
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566 } |
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567 } |
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568 |
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569 // returns true if eeprom was written |
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570 static bool |
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571 set_initial_eeprom() |
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572 { |
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573 uint16_t magic; |
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574 eeprom_read(magic, magic); |
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575 if (magic == EXPECT_MAGIC) |
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576 { |
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577 return false; |
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578 } |
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579 |
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580 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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581 { |
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582 eeprom_write(measure_wake, measure_wake); |
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583 eeprom_write(comms_wake, comms_wake); |
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584 eeprom_write(wake_secs, wake_secs); |
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585 eeprom_write(fridge_setpoint, fridge_setpoint); |
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586 eeprom_write(fridge_difference, fridge_difference); |
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587 eeprom_write(fridge_delay, fridge_delay); |
| 135 | 588 eeprom_write(overshoot_delay, overshoot_delay); |
| 589 eeprom_write(overshoot_factor, overshoot_factor); | |
|
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590 magic = EXPECT_MAGIC; |
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591 eeprom_write(magic, magic); |
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592 } |
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593 |
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594 return true; |
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595 } |
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596 |
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597 static void |
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598 cmd_set_fridge_setpoint(char *params) |
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599 { |
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600 float new_f = atof(params); |
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601 if (new_f < 2 || new_f > 30) |
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602 { |
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603 printf_P(PSTR("Bad fridge value %f\n"), new_f); |
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604 return; |
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605 } |
| 114 | 606 |
|
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607 int16_t old_setpoint = fridge_setpoint; |
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608 |
|
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609 fridge_setpoint = new_f * 10; |
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610 bool written = set_initial_eeprom(); |
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611 if (!written) |
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612 { |
|
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613 if (old_setpoint != fridge_setpoint) |
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614 { |
|
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615 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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616 { |
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617 eeprom_write(fridge_setpoint, fridge_setpoint); |
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618 } |
|
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619 } |
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620 } |
|
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621 printf_P(PSTR("old fridge %.1fº new fridge %.1fº\n"), |
|
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622 old_setpoint / 10.0f, fridge_setpoint / 10.0f); |
|
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623 } |
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624 |
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625 static void |
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626 cmd_set_fridge_difference(char *params) |
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627 { |
|
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628 float new_f = atof(params); |
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629 if (new_f < 0 || new_f > 30) |
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630 { |
|
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631 printf_P(PSTR("Bad fridge value %f\n"), new_f); |
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632 return; |
|
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633 } |
|
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634 |
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635 fridge_difference = new_f * 10; |
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636 bool written = set_initial_eeprom(); |
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637 if (!written) |
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638 { |
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639 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
|
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640 { |
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641 eeprom_write(fridge_difference, fridge_difference); |
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642 } |
|
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|
643 } |
|
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644 printf_P(PSTR("new fridge difference %.1fº\n"), fridge_difference / 10.0f); |
|
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645 } |
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646 |
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647 static void |
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648 cmd_set_fridge_delay(char *params) |
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649 { |
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650 uint16_t new_delay = atoi(params); |
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651 if (new_delay < 5) |
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652 { |
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653 printf_P(PSTR("Bad fridge delay %d\n"), new_delay); |
|
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|
654 return; |
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|
655 } |
|
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|
656 |
|
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657 fridge_delay = new_delay; |
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658 bool written = set_initial_eeprom(); |
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659 if (!written) |
|
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|
660 { |
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661 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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662 { |
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663 eeprom_write(fridge_delay, fridge_delay); |
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664 } |
| 114 | 665 } |
|
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666 printf_P(PSTR("new fridge delay %hu\n"), fridge_delay); |
| 80 | 667 } |
| 135 | 668 |
| 669 static void | |
| 670 cmd_set_overshoot_factor(char *params) | |
| 671 { | |
| 672 float new_f = atof(params); | |
| 673 if (new_f <= 0 || new_f > 20) | |
| 674 { | |
| 675 printf_P(PSTR("Bad overshoot factor %f\n"), new_f); | |
| 676 return; | |
| 677 } | |
| 678 | |
| 679 uint8_t old = overshoot_delay; | |
| 680 | |
| 681 overshoot_delay = new_f * 10; | |
| 682 bool written = set_initial_eeprom(); | |
| 683 if (!written) | |
| 684 { | |
| 685 if (old != overshoot_factor) | |
| 686 { | |
| 687 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) | |
| 688 { | |
| 689 eeprom_write(overshoot_factor, overshoot_factor); | |
| 690 } | |
| 691 } | |
| 692 } | |
| 693 printf_P(PSTR("old factor %.1fº new factor %.1fº\n"), | |
| 694 old / 10.0f, overshoot_factor / 10.0f); | |
| 695 } | |
| 115 | 696 |
| 80 | 697 static void |
| 135 | 698 cmd_set_overshoot_delay(char *params) |
| 699 { | |
| 700 uint16_t new_delay = atoi(params); | |
| 701 if (new_delay < 5) | |
| 702 { | |
| 703 printf_P(PSTR("Bad overshoot delay %d\n"), new_delay); | |
| 704 return; | |
| 705 } | |
| 706 | |
| 707 overshoot_delay = new_delay; | |
| 708 bool written = set_initial_eeprom(); | |
| 709 if (!written) | |
| 710 { | |
| 711 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) | |
| 712 { | |
| 713 eeprom_write(overshoot_delay, overshoot_delay); | |
| 714 } | |
| 715 } | |
| 716 printf_P(PSTR("new overshoot delay %hu\n"), overshoot_delay); | |
| 717 } | |
| 718 | |
| 719 static void | |
| 80 | 720 cmd_awake() |
| 721 { | |
| 722 stay_awake = 1; | |
| 723 printf_P(PSTR("awake\n")); | |
| 13 | 724 } |
| 725 | |
| 12 | 726 static void |
| 0 | 727 read_handler() |
| 728 { | |
| 6 | 729 if (strcmp_P(readbuf, PSTR("fetch")) == 0) |
| 0 | 730 { |
| 731 cmd_fetch(); | |
| 732 } | |
| 6 | 733 else if (strcmp_P(readbuf, PSTR("clear")) == 0) |
| 0 | 734 { |
| 735 cmd_clear(); | |
| 736 } | |
| 6 | 737 else if (strcmp_P(readbuf, PSTR("btoff")) == 0) |
| 0 | 738 { |
| 739 cmd_btoff(); | |
| 740 } | |
| 12 | 741 else if (strcmp_P(readbuf, PSTR("measure")) == 0) |
| 742 { | |
| 743 cmd_measure(); | |
| 744 } | |
| 745 else if (strcmp_P(readbuf, PSTR("sensors")) == 0) | |
| 746 { | |
| 747 cmd_sensors(); | |
| 748 } | |
| 80 | 749 else if (strcmp_P(readbuf, PSTR("get_params")) == 0) |
| 750 { | |
| 751 cmd_get_params(); | |
| 752 } | |
| 83 | 753 else if (strncmp_P(readbuf, PSTR("set_params "), 11) == 0) |
| 80 | 754 { |
| 83 | 755 cmd_set_params(&readbuf[11]); |
| 80 | 756 } |
| 757 else if (strcmp_P(readbuf, PSTR("awake")) == 0) | |
| 758 { | |
| 759 cmd_awake(); | |
| 760 } | |
|
116
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|
761 else if (strncmp_P(readbuf, PSTR("fridge_setpoint "), 16) == 0) |
|
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|
762 { |
|
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|
763 cmd_set_fridge_setpoint(&readbuf[16]); |
|
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|
764 } |
|
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|
765 else if (strncmp_P(readbuf, PSTR("fridge_diff "), 12) == 0) |
|
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|
766 { |
|
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|
767 cmd_set_fridge_difference(&readbuf[12]); |
|
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|
768 } |
|
9afff8f29844
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diff
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|
769 else if (strncmp_P(readbuf, PSTR("fridge_delay "), 13) == 0) |
|
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diff
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|
770 { |
|
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parents:
115
diff
changeset
|
771 cmd_set_fridge_delay(&readbuf[13]); |
|
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|
772 } |
| 135 | 773 else if (strncmp_P(readbuf, PSTR("overshoot_delay "), 16) == 0) |
| 774 { | |
| 775 cmd_set_overshoot_delay(&readbuf[16]); | |
| 776 } | |
| 777 else if (strncmp_P(readbuf, PSTR("overshoot_factor "), 17) == 0) | |
| 778 { | |
| 779 cmd_set_overshoot_factor(&readbuf[17]); | |
| 780 } | |
|
54
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add "awake" and "reset" functions
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diff
changeset
|
781 else if (strcmp_P(readbuf, PSTR("reset")) == 0) |
|
0d3d14af55c2
add "awake" and "reset" functions
Matt Johnston <matt@ucc.asn.au>
parents:
52
diff
changeset
|
782 { |
|
0d3d14af55c2
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parents:
52
diff
changeset
|
783 cmd_reset(); |
|
0d3d14af55c2
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diff
changeset
|
784 } |
| 0 | 785 else |
| 786 { | |
| 83 | 787 printf_P(PSTR("Bad command '%s'\n"), readbuf); |
| 0 | 788 } |
| 789 } | |
| 790 | |
|
20
878be5e353a0
Untested - calculate crc in uart_putchar
Matt Johnston <matt@ucc.asn.au>
parents:
19
diff
changeset
|
791 ISR(INT0_vect) |
| 18 | 792 { |
|
90
a1c1c2d475b0
print the remainder of timers as well
Matt Johnston <matt@ucc.asn.au>
parents:
89
diff
changeset
|
793 button_pressed = 1; |
|
24
44c5ab5ea879
- some fixes for server code
Matt Johnston <matt@ucc.asn.au>
parents:
22
diff
changeset
|
794 blink(); |
|
44c5ab5ea879
- some fixes for server code
Matt Johnston <matt@ucc.asn.au>
parents:
22
diff
changeset
|
795 _delay_ms(100); |
|
44c5ab5ea879
- some fixes for server code
Matt Johnston <matt@ucc.asn.au>
parents:
22
diff
changeset
|
796 blink(); |
| 18 | 797 } |
| 798 | |
| 799 | |
| 2 | 800 ISR(USART_RX_vect) |
| 0 | 801 { |
| 2 | 802 char c = UDR0; |
| 33 | 803 #ifdef HAVE_UART_ECHO |
| 12 | 804 uart_putchar(c, NULL); |
| 33 | 805 #endif |
|
22
885532437100
A bit of work on the server python
Matt Johnston <matt@ucc.asn.au>
parents:
20
diff
changeset
|
806 if (c == '\r' || c == '\n') |
| 0 | 807 { |
|
22
885532437100
A bit of work on the server python
Matt Johnston <matt@ucc.asn.au>
parents:
20
diff
changeset
|
808 if (readpos > 0) |
|
885532437100
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Matt Johnston <matt@ucc.asn.au>
parents:
20
diff
changeset
|
809 { |
|
885532437100
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Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
810 readbuf[readpos] = '\0'; |
|
27
dbbd503119ba
Add some web server handling
Matt Johnston <matt@ucc.asn.au>
parents:
26
diff
changeset
|
811 have_cmd = 1; |
|
22
885532437100
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parents:
20
diff
changeset
|
812 readpos = 0; |
|
885532437100
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parents:
20
diff
changeset
|
813 } |
| 0 | 814 } |
| 815 else | |
| 816 { | |
| 817 readbuf[readpos] = c; | |
| 818 readpos++; | |
| 819 if (readpos >= sizeof(readbuf)) | |
| 820 { | |
| 821 readpos = 0; | |
| 822 } | |
| 823 } | |
| 824 } | |
| 825 | |
| 2 | 826 ISR(TIMER2_COMPA_vect) |
| 1 | 827 { |
| 14 | 828 TCNT2 = 0; |
| 80 | 829 measure_count += TICK; |
| 830 comms_count += TICK; | |
|
16
5075d8c428bd
untested, add comms timeout code
Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
831 |
| 80 | 832 clock_epoch += TICK; |
| 17 | 833 |
|
16
5075d8c428bd
untested, add comms timeout code
Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
834 if (comms_timeout != 0) |
|
5075d8c428bd
untested, add comms timeout code
Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
835 { |
| 80 | 836 comms_timeout -= TICK; |
|
16
5075d8c428bd
untested, add comms timeout code
Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
837 } |
|
5075d8c428bd
untested, add comms timeout code
Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
838 |
| 80 | 839 if (measure_count >= measure_wake) |
| 1 | 840 { |
|
4
54d369e3d689
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
841 measure_count = 0; |
| 1 | 842 need_measurement = 1; |
| 843 } | |
|
4
54d369e3d689
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3
diff
changeset
|
844 |
| 80 | 845 if (comms_count >= comms_wake) |
| 41 | 846 { |
| 847 comms_count = 0; | |
| 848 need_comms = 1; | |
| 849 } | |
| 1 | 850 } |
| 851 | |
| 852 static void | |
| 853 deep_sleep() | |
| 854 { | |
| 855 // p119 of manual | |
| 2 | 856 OCR2A = SLEEP_COMPARE; |
| 857 loop_until_bit_is_clear(ASSR, OCR2AUB); | |
| 1 | 858 |
| 859 set_sleep_mode(SLEEP_MODE_PWR_SAVE); | |
| 860 sleep_mode(); | |
| 861 } | |
| 862 | |
| 863 static void | |
|
4
54d369e3d689
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
864 idle_sleep() |
|
54d369e3d689
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
865 { |
|
54d369e3d689
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
866 set_sleep_mode(SLEEP_MODE_IDLE); |
|
54d369e3d689
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
867 sleep_mode(); |
|
54d369e3d689
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
868 } |
|
54d369e3d689
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Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
869 |
| 59 | 870 static uint16_t |
| 871 adc_vcc() | |
|
55
8e897a682208
untested code to log voltage and internal temperature
Matt Johnston <matt@ucc.asn.au>
parents:
54
diff
changeset
|
872 { |
|
8e897a682208
untested code to log voltage and internal temperature
Matt Johnston <matt@ucc.asn.au>
parents:
54
diff
changeset
|
873 PRR &= ~_BV(PRADC); |
|
8e897a682208
untested code to log voltage and internal temperature
Matt Johnston <matt@ucc.asn.au>
parents:
54
diff
changeset
|
874 |
| 62 | 875 // /16 prescaler |
|
55
8e897a682208
untested code to log voltage and internal temperature
Matt Johnston <matt@ucc.asn.au>
parents:
54
diff
changeset
|
876 ADCSRA = _BV(ADEN) | _BV(ADPS2); |
|
8e897a682208
untested code to log voltage and internal temperature
Matt Johnston <matt@ucc.asn.au>
parents:
54
diff
changeset
|
877 |
|
8e897a682208
untested code to log voltage and internal temperature
Matt Johnston <matt@ucc.asn.au>
parents:
54
diff
changeset
|
878 // set to measure 1.1 reference |
| 58 | 879 ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1); |
| 60 | 880 // average a number of samples |
| 881 uint16_t sum = 0; | |
| 882 uint8_t num = 0; | |
| 883 for (uint8_t n = 0; n < 20; n++) | |
| 59 | 884 { |
| 885 ADCSRA |= _BV(ADSC); | |
| 886 loop_until_bit_is_clear(ADCSRA, ADSC); | |
|
55
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diff
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|
887 |
| 60 | 888 uint8_t low_11 = ADCL; |
| 889 uint8_t high_11 = ADCH; | |
| 890 uint16_t val = low_11 + (high_11 << 8); | |
| 6 | 891 |
| 60 | 892 if (n >= 4) |
| 893 { | |
| 894 sum += val; | |
| 895 num++; | |
| 896 } | |
| 897 } | |
| 898 ADCSRA = 0; | |
| 899 PRR |= _BV(PRADC); | |
| 6 | 900 |
| 80 | 901 //float res_volts = 1.1 * 1024 * num / sum; |
| 902 //return 1000 * res_volts; | |
| 903 return ((uint32_t)1100*1024*num) / sum; | |
| 6 | 904 } |
| 905 | |
|
4
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906 static void |
| 115 | 907 do_fridge() |
| 908 { | |
| 909 struct epoch_ticks now; | |
| 910 get_epoch_ticks(&now); | |
|
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911 uint32_t off_time = now.ticks - fridge_off_clock.ticks; |
|
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912 bool wort_valid = last_wort != DS18X20_INVALID_DECICELSIUS; |
|
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913 bool fridge_valid = last_fridge != DS18X20_INVALID_DECICELSIUS; |
|
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|
914 |
|
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915 int16_t wort_max = fridge_setpoint + fridge_difference; |
|
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916 int16_t wort_min = fridge_setpoint; |
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|
917 |
|
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|
918 // the fridge min/max only apply if the wort sensor is broken |
|
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919 int16_t fridge_min = fridge_setpoint - FRIDGE_AIR_MIN_RANGE; |
|
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920 int16_t fridge_max = fridge_setpoint + FRIDGE_AIR_MAX_RANGE; |
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921 |
|
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922 uint8_t fridge_on = PORT_FRIDGE & _BV(PIN_FRIDGE); |
|
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923 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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924 last_wort, wort_min, wort_max, |
|
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925 last_fridge, fridge_min, fridge_max, |
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|
926 fridge_setpoint, fridge_difference, fridge_on); |
|
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|
927 |
|
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|
928 if (off_time < fridge_delay) |
| 115 | 929 { |
|
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930 printf_P(PSTR("waiting for fridge delay current %hu, wait %hu\n"), |
|
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931 off_time, fridge_delay); |
| 115 | 932 return; |
| 933 } | |
| 934 | |
|
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|
935 // handle failure of the wort sensor. if it is a short (intermittent?) |
|
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|
936 // failure we wait until it has been broken for a period of time |
|
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937 // (WORT_INVALID_TIME) before doing anything. |
|
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|
938 if (wort_valid) |
|
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|
939 { |
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|
940 wort_valid_clock = now; |
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941 } |
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|
942 else |
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|
943 { |
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|
944 printf_P(PSTR("wort sensor is invalid\n")); |
|
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|
945 uint32_t invalid_time = now.ticks - wort_valid_clock.ticks; |
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946 if (invalid_time < WORT_INVALID_TIME) |
|
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947 { |
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948 printf("only been invalid for %ld, waiting\n", invalid_time); |
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|
949 return; |
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|
950 } |
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951 } |
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|
952 |
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|
953 if (!fridge_valid) |
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|
954 { |
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|
955 printf_P(PSTR("fridge sensor is invalid\n")); |
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956 } |
| 115 | 957 |
| 958 if (fridge_on) | |
| 959 { | |
|
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960 bool turn_off = false; |
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|
961 uint16_t on_time = now.ticks - fridge_on_clock.ticks; |
|
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|
962 |
|
130
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|
963 uint16_t overshoot = 0; |
| 135 | 964 if (on_time > overshoot_delay) |
|
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|
965 { |
| 135 | 966 overshoot = overshoot_factor * MIN(OVERSHOOT_MAX_DIV, on_time) / OVERSHOOT_MAX_DIV; |
|
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967 } |
|
128
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|
968 |
|
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|
969 printf_P(PSTR("on_time %hu, overshoot %hu\n"), on_time, overshoot); |
|
121
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|
970 |
|
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|
971 // wort has cooled enough. will probably cool a bit more by itself |
|
130
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|
972 if (wort_valid) |
|
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|
973 { |
|
130
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974 if ((last_wort - overshoot) < fridge_setpoint) |
|
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|
975 { |
|
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|
976 printf_P(PSTR("wort has cooled enough, overshoot %hu on_time %hu\n"), overshoot, on_time); |
|
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|
977 turn_off = true; |
|
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|
978 } |
|
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979 } |
|
130
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|
980 else |
|
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981 { |
|
130
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982 if (fridge_valid && last_fridge < fridge_min) |
|
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|
983 { |
|
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|
984 printf_P(PSTR("fridge off fallback\n")); |
|
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|
985 turn_off = true; |
|
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|
986 } |
|
121
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|
987 } |
|
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|
988 |
|
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|
989 if (turn_off) |
| 115 | 990 { |
| 991 // too cold, turn off | |
|
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992 printf_P(PSTR("Turning fridge off\n")); |
| 115 | 993 PORT_FRIDGE &= ~_BV(PIN_FRIDGE); |
| 994 fridge_off_clock = now; | |
| 995 } | |
| 996 } | |
| 997 else | |
| 998 { | |
|
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999 bool turn_on = false; |
|
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|
1000 |
|
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1001 if (wort_valid) |
| 127 | 1002 { |
|
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1003 if (last_wort >= wort_max) |
|
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|
1004 { |
|
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1005 printf_P(PSTR("wort is too hot\n")); |
|
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1006 turn_on = true; |
|
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1007 } |
| 127 | 1008 } |
|
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1009 else |
|
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1010 { |
|
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1011 if (fridge_valid && last_fridge >= fridge_max) |
|
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1012 { |
|
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1013 printf_P(PSTR("fridge on fallback\n")); |
|
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1014 turn_on = true; |
|
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1015 } |
|
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1016 } |
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1017 |
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1018 if (turn_on) |
| 115 | 1019 { |
| 1020 // too hot, turn on | |
|
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1021 printf_P(PSTR("Turning fridge on\n")); |
| 115 | 1022 PORT_FRIDGE |= _BV(PIN_FRIDGE); |
|
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1023 fridge_on_clock = now; |
| 115 | 1024 } |
| 1025 } | |
| 1026 } | |
| 1027 | |
| 1028 static void | |
| 1 | 1029 do_measurement() |
| 1030 { | |
|
75
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|
1031 blink(); |
|
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|
1032 |
|
90
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1033 /* Take the timer here since deep_sleep() below could take 6 seconds */ |
|
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1034 get_epoch_ticks(&last_measurement_clock); |
|
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1035 if (n_measurements == 0) |
|
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1036 { |
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|
1037 first_measurement_clock = last_measurement_clock; |
|
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Matt Johnston <matt@ucc.asn.au>
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|
1038 } |
|
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diff
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|
1039 |
|
55
8e897a682208
untested code to log voltage and internal temperature
Matt Johnston <matt@ucc.asn.au>
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diff
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|
1040 simple_ds18b20_start_meas(NULL); |
|
134
405785632c78
use delay_ms not timer tick - more robust
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diff
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|
1041 _delay_ms(DS18B20_TCONV_12BIT); |
| 13 | 1042 |
| 80 | 1043 if (n_measurements == max_measurements) |
| 13 | 1044 { |
| 1045 n_measurements = 0; | |
| 1046 } | |
| 6 | 1047 |
| 80 | 1048 for (uint8_t s = 0; s < n_sensors; s++) |
| 13 | 1049 { |
|
75
ca08442635ca
report raw ds18b20 values instead
Matt Johnston <matt@ucc.asn.au>
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diff
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|
1050 uint16_t reading; |
| 80 | 1051 uint8_t ret = simple_ds18b20_read_raw(sensor_id[s], &reading); |
| 1052 if (ret != DS18X20_OK) | |
| 13 | 1053 { |
| 80 | 1054 reading = VALUE_BROKEN; |
| 13 | 1055 } |
| 80 | 1056 set_measurement(s, n_measurements, reading); |
| 115 | 1057 |
| 1058 if (memcmp(sensor_id[s], fridge_id, sizeof(fridge_id)) == 0) | |
| 1059 { | |
|
121
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try and take account of the fridge temperature too
Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
1060 last_fridge = ds18b20_raw16_to_decicelsius(reading); |
| 115 | 1061 } |
| 1062 if (memcmp(sensor_id[s], wort_id, sizeof(wort_id)) == 0) | |
| 1063 { | |
|
121
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|
1064 last_wort = ds18b20_raw16_to_decicelsius(reading); |
| 115 | 1065 } |
| 13 | 1066 } |
|
22
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A bit of work on the server python
Matt Johnston <matt@ucc.asn.au>
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20
diff
changeset
|
1067 |
| 14 | 1068 n_measurements++; |
| 1 | 1069 } |
| 1070 | |
|
4
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diff
changeset
|
1071 static void |
|
54d369e3d689
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|
1072 do_comms() |
|
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|
1073 { |
|
90
a1c1c2d475b0
print the remainder of timers as well
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|
1074 get_epoch_ticks(&last_comms_clock); |
|
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|
1075 |
| 41 | 1076 // turn on bluetooth |
|
24
44c5ab5ea879
- some fixes for server code
Matt Johnston <matt@ucc.asn.au>
parents:
22
diff
changeset
|
1077 set_aux_power(1); |
|
89
51d889ad39a3
main.c : add a delay before turning on uart
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
1078 // avoid receiving rubbish, perhaps |
|
51d889ad39a3
main.c : add a delay before turning on uart
Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
1079 _delay_ms(50); |
| 7 | 1080 uart_on(); |
| 41 | 1081 |
| 1082 // write sd card here? same 3.3v regulator... | |
| 1083 | |
| 80 | 1084 for (comms_timeout = wake_secs; |
| 1085 comms_timeout > 0 || stay_awake; | |
| 1086 ) | |
| 41 | 1087 { |
| 6 | 1088 if (need_measurement) |
| 1089 { | |
| 14 | 1090 need_measurement = 0; |
| 6 | 1091 do_measurement(); |
| 115 | 1092 do_fridge(); |
| 44 | 1093 continue; |
| 6 | 1094 } |
| 1095 | |
|
27
dbbd503119ba
Add some web server handling
Matt Johnston <matt@ucc.asn.au>
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26
diff
changeset
|
1096 if (have_cmd) |
|
dbbd503119ba
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Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
1097 { |
|
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Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
1098 have_cmd = 0; |
|
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Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
1099 read_handler(); |
| 44 | 1100 continue; |
|
27
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Matt Johnston <matt@ucc.asn.au>
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26
diff
changeset
|
1101 } |
|
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26
diff
changeset
|
1102 |
|
16
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Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
1103 // wait for commands from the master |
| 41 | 1104 idle_sleep(); |
| 1105 } | |
|
4
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parents:
3
diff
changeset
|
1106 |
| 6 | 1107 uart_off(); |
|
46
9ccd965d938a
Use the PRR etc, set value to proper ones
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
1108 // in case bluetooth takes time to flush |
|
9ccd965d938a
Use the PRR etc, set value to proper ones
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
1109 _delay_ms(100); |
|
16
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Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
1110 set_aux_power(0); |
|
4
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parents:
3
diff
changeset
|
1111 } |
|
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diff
changeset
|
1112 |
| 7 | 1113 static void |
| 1114 blink() | |
| 1115 { | |
| 1116 PORT_LED &= ~_BV(PIN_LED); | |
| 9 | 1117 _delay_ms(1); |
| 7 | 1118 PORT_LED |= _BV(PIN_LED); |
| 1119 } | |
| 1120 | |
| 1121 static void | |
| 1122 long_delay(int ms) | |
| 1123 { | |
| 1124 int iter = ms / 100; | |
| 1125 | |
| 1126 for (int i = 0; i < iter; i++) | |
| 1127 { | |
| 1128 _delay_ms(100); | |
| 1129 } | |
| 1130 } | |
| 1131 | |
| 8 | 1132 ISR(BADISR_vect) |
| 1133 { | |
| 14 | 1134 //uart_on(); |
| 8 | 1135 printf_P(PSTR("Bad interrupt\n")); |
| 1136 } | |
| 1137 | |
| 0 | 1138 int main(void) |
| 1139 { | |
|
16
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Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
1140 setup_chip(); |
|
5075d8c428bd
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Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
1141 blink(); |
| 9 | 1142 |
|
16
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parents:
15
diff
changeset
|
1143 set_aux_power(0); |
| 7 | 1144 |
| 6 | 1145 stdout = &mystdout; |
| 7 | 1146 uart_on(); |
| 1147 | |
|
16
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Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
1148 printf(PSTR("Started.\n")); |
| 13 | 1149 |
| 80 | 1150 load_params(); |
| 13 | 1151 |
|
76
6e47a61edc47
don't store sensors in eeprom, scan at startup instead
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
1152 init_sensors(); |
|
6e47a61edc47
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Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
1153 |
| 8 | 1154 uart_off(); |
| 0 | 1155 |
| 6 | 1156 // turn off everything except timer2 |
|
46
9ccd965d938a
Use the PRR etc, set value to proper ones
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
1157 PRR = _BV(PRTWI) | _BV(PRTIM0) | _BV(PRTIM1) | _BV(PRSPI) | _BV(PRUSART0) | _BV(PRADC); |
| 8 | 1158 |
|
16
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parents:
15
diff
changeset
|
1159 setup_tick_counter(); |
|
5075d8c428bd
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diff
changeset
|
1160 |
| 12 | 1161 sei(); |
| 8 | 1162 |
|
25
2943f62c8e62
- Make the python work on openwrt
Matt Johnston <matt@ucc.asn.au>
parents:
24
diff
changeset
|
1163 need_comms = 1; |
|
36
a670a67ba489
- decrease measurement interval, measure at start
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parents:
33
diff
changeset
|
1164 need_measurement = 1; |
|
25
2943f62c8e62
- Make the python work on openwrt
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parents:
24
diff
changeset
|
1165 |
| 117 | 1166 stay_awake = 1; |
| 1167 | |
|
16
5075d8c428bd
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Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
1168 for(;;) |
|
5075d8c428bd
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parents:
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diff
changeset
|
1169 { |
|
90
a1c1c2d475b0
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parents:
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diff
changeset
|
1170 if (button_pressed) |
|
a1c1c2d475b0
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Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
1171 { |
|
a1c1c2d475b0
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Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
1172 // debounce |
|
a1c1c2d475b0
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parents:
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diff
changeset
|
1173 _delay_ms(200); |
|
a1c1c2d475b0
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parents:
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diff
changeset
|
1174 need_comms = 1; |
|
a1c1c2d475b0
print the remainder of timers as well
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
1175 comms_timeout = wake_secs; |
|
a1c1c2d475b0
print the remainder of timers as well
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
1176 button_pressed = 0; |
| 41 | 1177 continue; |
| 1 | 1178 } |
|
4
54d369e3d689
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
1179 |
|
54d369e3d689
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Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
1180 if (need_comms) |
|
54d369e3d689
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
1181 { |
|
16
5075d8c428bd
untested, add comms timeout code
Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
1182 need_comms = 0; |
|
4
54d369e3d689
Fill out more main.c structure
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parents:
3
diff
changeset
|
1183 do_comms(); |
| 41 | 1184 continue; |
|
4
54d369e3d689
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
1185 } |
|
54d369e3d689
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
1186 |
| 97 | 1187 if (need_measurement) |
| 1188 { | |
| 1189 need_measurement = 0; | |
| 1190 do_measurement(); | |
| 115 | 1191 do_fridge(); |
| 97 | 1192 continue; |
| 1193 } | |
| 1194 | |
| 41 | 1195 deep_sleep(); |
| 0 | 1196 } |
| 12 | 1197 |
| 0 | 1198 return 0; /* never reached */ |
| 1199 } |