Mercurial > templog
annotate main.c @ 133:190ac4e5a2bf
merge
author | Matt Johnston <matt@ucc.asn.au> |
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date | Sun, 14 Oct 2012 21:52:00 +0800 |
parents | 66d5e15f40d0 |
children | 405785632c78 |
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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 |
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38 // ranges are in decicelcius |
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39 #define OVERSHOOT_DELAY 1800 // 30 mins |
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40 #define OVERSHOOT_FACTOR 1 |
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41 #define WORT_INVALID_TIME 900 // 15 mins |
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42 // fridge min/max are only used if the wort sensor is invalid |
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43 #define FRIDGE_AIR_MIN_RANGE 40 // 4º |
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44 #define FRIDGE_AIR_MAX_RANGE 40 // 4º |
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45 |
10 | 46 #define BAUD 19200 |
7 | 47 #define UBRR ((F_CPU)/8/(BAUD)-1) |
48 | |
49 #define PORT_LED PORTC | |
50 #define DDR_LED DDRC | |
51 #define PIN_LED PC4 | |
1 | 52 |
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53 #define PORT_SHDN PORTD |
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54 #define DDR_SHDN DDRD |
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55 #define PIN_SHDN PD7 |
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56 |
115 | 57 #define PORT_FRIDGE PORTD |
58 #define DDR_FRIDGE DDRD | |
59 #define PIN_FRIDGE PD6 | |
60 | |
80 | 61 // total amount of 16bit values available for measurements. |
62 // adjust emperically, be sure to allow enough stack space too | |
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63 #define TOTAL_MEASUREMENTS 800 |
80 | 64 |
65 // each sensor slot uses 8 bytes | |
66 #define MAX_SENSORS 6 | |
6 | 67 |
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68 // fixed at 8, have a shorter name |
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69 #define ID_LEN OW_ROMCODE_SIZE |
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70 |
33 | 71 // #define HAVE_UART_ECHO |
72 | |
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73 // stores a value of clock_epoch combined with the remainder of TCNT2, |
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74 // for 1/32 second accuracy |
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75 struct epoch_ticks |
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76 { |
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77 uint32_t ticks; |
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78 // remainder |
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79 uint8_t rem; |
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80 }; |
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81 |
80 | 82 // eeprom-settable parameters. all timeouts should |
83 // be a multiple of TICK (6 seconds probably) | |
115 | 84 static uint16_t measure_wake = 61; // not a divisor of comms_wake |
85 static uint16_t comms_wake = 600; | |
80 | 86 static uint8_t wake_secs = 30; |
115 | 87 // decidegrees |
88 static int16_t fridge_setpoint = 180; // 18.0ºC | |
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89 static int16_t fridge_difference = 3; // 0.3ºC |
115 | 90 static uint16_t fridge_delay = 600; // seconds |
114 | 91 |
59 | 92 // ---- Atomic guards required accessing these variables |
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93 // clock_epoch in seconds |
59 | 94 static uint32_t clock_epoch; |
95 static uint16_t comms_count; | |
96 static uint16_t measure_count; | |
97 // ---- End atomic guards required | |
98 | |
17 | 99 static uint16_t n_measurements; |
59 | 100 |
80 | 101 // calculated at startup as TOTAL_MEASUREMENTS/n_sensors |
102 static uint16_t max_measurements; | |
103 | |
104 static uint16_t measurements[TOTAL_MEASUREMENTS]; | |
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105 |
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106 static struct epoch_ticks first_measurement_clock; |
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107 // last_measurement_clock is redundant but checks that we're not missing |
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108 // samples |
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109 static struct epoch_ticks last_measurement_clock; |
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110 static struct epoch_ticks last_comms_clock; |
59 | 111 |
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112 // boolean flags |
17 | 113 static uint8_t need_measurement; |
114 static uint8_t need_comms; | |
40 | 115 static uint8_t uart_enabled; |
80 | 116 static uint8_t stay_awake; |
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117 static uint8_t button_pressed; |
1 | 118 |
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119 // counts down from WAKE_SECS to 0, goes to deep sleep when hits 0 |
17 | 120 static uint8_t comms_timeout; |
1 | 121 |
17 | 122 static uint8_t readpos; |
0 | 123 static char readbuf[30]; |
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124 static uint8_t have_cmd; |
0 | 125 |
80 | 126 static uint8_t n_sensors; |
127 static uint8_t sensor_id[MAX_SENSORS][ID_LEN]; | |
128 | |
115 | 129 static int16_t last_fridge = DS18X20_INVALID_DECICELSIUS; |
130 static int16_t last_wort = DS18X20_INVALID_DECICELSIUS; | |
131 static struct epoch_ticks fridge_off_clock = {0}; | |
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132 static struct epoch_ticks fridge_on_clock = {0}; |
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133 static struct epoch_ticks wort_valid_clock = {0}; |
80 | 134 |
135 int uart_putchar(char c, FILE *stream); | |
136 static void long_delay(int ms); | |
137 static void blink(); | |
138 static uint16_t adc_vcc(); | |
139 | |
140 static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL, | |
141 _FDEV_SETUP_WRITE); | |
142 | |
143 static uint16_t crc_out; | |
144 static FILE _crc_stdout = FDEV_SETUP_STREAM(uart_putchar, NULL, | |
145 _FDEV_SETUP_WRITE); | |
146 // convenience | |
147 static FILE *crc_stdout = &_crc_stdout; | |
148 | |
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149 |
13 | 150 // thanks to http://projectgus.com/2010/07/eeprom-access-with-arduino/ |
151 #define eeprom_read_to(dst_p, eeprom_field, dst_size) eeprom_read_block((dst_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (dst_size)) | |
152 #define eeprom_read(dst, eeprom_field) eeprom_read_to((&dst), eeprom_field, sizeof(dst)) | |
153 #define eeprom_write_from(src_p, eeprom_field, src_size) eeprom_write_block((src_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (src_size)) | |
154 #define eeprom_write(src, eeprom_field) { eeprom_write_from(&src, eeprom_field, sizeof(src)); } | |
155 | |
156 #define EXPECT_MAGIC 0x67c9 | |
157 | |
158 struct __attribute__ ((__packed__)) __eeprom_data { | |
159 uint16_t magic; | |
80 | 160 uint16_t measure_wake; |
161 uint16_t comms_wake; | |
162 uint8_t wake_secs; | |
114 | 163 |
115 | 164 int16_t fridge_setpoint; // decidegrees |
165 uint8_t fridge_difference; // decidegrees | |
166 uint16_t fridge_delay; | |
114 | 167 |
115 | 168 #if 0 |
169 static uint8_t wort_id[ID_LEN]; | |
170 static uint8_t fridge_id[ID_LEN]; | |
171 #endif | |
172 }; | |
114 | 173 |
115 | 174 static const uint8_t fridge_id[ID_LEN] = |
175 {0x28,0xCE,0xB2,0x1A,0x03,0x00,0x00,0x99}; | |
176 static const uint8_t wort_id[ID_LEN] = | |
177 {0x28,0x49,0xBC,0x1A,0x03,0x00,0x00,0x54}; | |
13 | 178 |
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179 static void deep_sleep(); |
1 | 180 |
117 | 181 // 0 or 1 |
182 static uint8_t | |
183 is_fridge_on() | |
184 { | |
185 if (PORT_FRIDGE & _BV(PIN_FRIDGE)) | |
186 { | |
187 return 1; | |
188 } | |
189 else | |
190 { | |
191 return 0; | |
192 } | |
193 } | |
194 | |
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195 // Very first setup |
18 | 196 static void |
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197 setup_chip() |
18 | 198 { |
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199 cli(); |
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200 |
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201 // stop watchdog timer (might have been used to cause a reset) |
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202 wdt_reset(); |
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203 MCUSR &= ~_BV(WDRF); |
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204 WDTCSR |= _BV(WDCE) | _BV(WDE); |
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205 WDTCSR = 0; |
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206 |
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207 // Set clock to 2mhz |
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208 CLKPR = _BV(CLKPCE); |
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209 // divide by 4 |
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210 CLKPR = _BV(CLKPS1); |
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211 |
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212 // enable pullups |
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213 PORTB = 0xff; // XXX change when using SPI |
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214 PORTD = 0xff; |
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215 PORTC = 0xff; |
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216 |
19 | 217 // 3.3v power for bluetooth and SD |
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218 DDR_LED |= _BV(PIN_LED); |
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219 DDR_SHDN |= _BV(PIN_SHDN); |
19 | 220 |
123
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221 PORT_FRIDGE &= ~_BV(PIN_FRIDGE); |
115 | 222 DDR_FRIDGE |= _BV(PIN_FRIDGE); |
223 | |
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224 // set pullup |
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225 PORTD |= _BV(PD2); |
41 | 226 // INT0 setup |
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227 EICRA = (1<<ISC01); // falling edge - data sheet says it won't work? |
41 | 228 EIMSK = _BV(INT0); |
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229 |
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230 // comparator disable |
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231 ACSR = _BV(ACD); |
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232 |
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233 // disable adc pin input buffers |
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234 DIDR0 = 0x3F; // acd0-adc5 |
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235 DIDR1 = (1<<AIN1D)|(1<<AIN0D); // ain0/ain1 |
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236 |
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237 sei(); |
18 | 238 } |
239 | |
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240 static void |
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241 set_aux_power(uint8_t on) |
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242 { |
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243 if (on) |
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244 { |
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245 PORT_SHDN &= ~_BV(PIN_SHDN); |
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246 } |
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247 else |
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248 { |
44 | 249 PORT_SHDN |= _BV(PIN_SHDN); |
16
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250 } |
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251 } |
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252 |
90
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253 static void |
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254 get_epoch_ticks(struct epoch_ticks *t) |
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255 { |
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256 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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257 { |
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258 t->ticks = clock_epoch; |
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259 t->rem = TCNT2; |
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260 } |
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261 } |
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262 |
80 | 263 static void |
264 set_measurement(uint8_t sensor, uint16_t measurement, uint16_t reading) | |
265 { | |
266 measurements[sensor*max_measurements + measurement] = reading; | |
267 } | |
268 | |
269 static uint16_t | |
270 get_measurement(uint8_t sensor, uint16_t measurement) | |
271 { | |
272 return measurements[sensor*max_measurements + measurement]; | |
273 } | |
274 | |
16
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275 static void |
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276 setup_tick_counter() |
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277 { |
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278 // set up counter2. |
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279 // COM21 COM20 Set OC2 on Compare Match (p116) |
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280 // WGM21 Clear counter on compare |
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281 //TCCR2A = _BV(COM2A1) | _BV(COM2A0) | _BV(WGM21); |
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282 // toggle on match |
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283 TCCR2A = _BV(COM2A0); |
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284 // CS22 CS21 CS20 clk/1024 |
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285 TCCR2B = _BV(CS22) | _BV(CS21) | _BV(CS20); |
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286 // set async mode |
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287 ASSR |= _BV(AS2); |
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288 TCNT2 = 0; |
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289 OCR2A = SLEEP_COMPARE; |
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290 // interrupt |
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291 TIMSK2 = _BV(OCIE2A); |
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292 } |
18 | 293 |
0 | 294 static void |
7 | 295 uart_on() |
0 | 296 { |
8 | 297 // Power reduction register |
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298 PRR &= ~_BV(PRUSART0); |
8 | 299 |
16
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300 // All of this needs to be done each time after turning off the PRR |
0 | 301 // baud rate |
7 | 302 UBRR0H = (unsigned char)(UBRR >> 8); |
303 UBRR0L = (unsigned char)UBRR; | |
304 // set 2x clock, improves accuracy of UBRR | |
305 UCSR0A |= _BV(U2X0); | |
6 | 306 UCSR0B = _BV(RXCIE0) | _BV(RXEN0) | _BV(TXEN0); |
0 | 307 //8N1 |
7 | 308 UCSR0C = _BV(UCSZ01) | _BV(UCSZ00); |
41 | 309 uart_enabled = 1; |
6 | 310 } |
311 | |
312 static void | |
313 uart_off() | |
314 { | |
89
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315 // Turn off interrupts and disable tx/rx |
6 | 316 UCSR0B = 0; |
41 | 317 uart_enabled = 0; |
6 | 318 |
319 // Power reduction register | |
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320 PRR |= _BV(PRUSART0); |
0 | 321 } |
322 | |
10 | 323 int |
0 | 324 uart_putchar(char c, FILE *stream) |
325 { | |
41 | 326 if (!uart_enabled) |
327 { | |
328 return EOF; | |
329 } | |
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330 // XXX could perhaps sleep in the loop for power. |
8 | 331 if (c == '\n') |
332 { | |
10 | 333 loop_until_bit_is_set(UCSR0A, UDRE0); |
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334 UDR0 = '\r'; |
8 | 335 } |
2 | 336 loop_until_bit_is_set(UCSR0A, UDRE0); |
337 UDR0 = c; | |
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338 if (stream == crc_stdout) |
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339 { |
26
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340 crc_out = _crc_ccitt_update(crc_out, c); |
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341 } |
10 | 342 if (c == '\r') |
343 { | |
344 loop_until_bit_is_set(UCSR0A, UDRE0); | |
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345 UDR0 = '\n'; |
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346 if (stream == crc_stdout) |
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347 { |
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348 crc_out = _crc_ccitt_update(crc_out, '\n'); |
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349 } |
10 | 350 } |
40 | 351 return (unsigned char)c; |
0 | 352 } |
353 | |
354 static void | |
355 cmd_fetch() | |
356 { | |
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357 crc_out = 0; |
55
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358 |
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359 fprintf_P(crc_stdout, PSTR("START\n")); |
59 | 360 { |
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361 struct epoch_ticks now; |
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362 get_epoch_ticks(&now); |
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363 fprintf_P(crc_stdout, PSTR("now=%lu\n"), now.ticks); |
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364 fprintf_P(crc_stdout, PSTR("now_rem=%hhu\n"), now.rem); |
59 | 365 } |
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366 fprintf_P(crc_stdout, PSTR("time_step=%hu\n"), measure_wake); |
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367 fprintf_P(crc_stdout, PSTR("first_time=%lu\n"), first_measurement_clock.ticks); |
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368 fprintf_P(crc_stdout, PSTR("first_time_rem=%hhu\n"), first_measurement_clock.rem); |
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369 fprintf_P(crc_stdout, PSTR("last_time=%lu\n"), last_measurement_clock.ticks); |
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370 fprintf_P(crc_stdout, PSTR("last_time_rem=%hhu\n"), last_measurement_clock.rem); |
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371 fprintf_P(crc_stdout, PSTR("comms_time=%lu\n"), last_comms_clock.ticks); |
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372 fprintf_P(crc_stdout, PSTR("comms_time_rem=%hhu\n"), last_comms_clock.rem); |
81
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373 fprintf_P(crc_stdout, PSTR("voltage=%hu\n"), adc_vcc()); |
87 | 374 fprintf_P(crc_stdout, PSTR("measure=%hu\n"), measure_wake); |
375 fprintf_P(crc_stdout, PSTR("comms=%hu\n"), comms_wake); | |
376 fprintf_P(crc_stdout, PSTR("wake=%hhu\n"), wake_secs); | |
115 | 377 fprintf_P(crc_stdout, PSTR("fridge=%.1f\n"), fridge_setpoint/10.0); |
378 fprintf_P(crc_stdout, PSTR("fridge_diff=%.1f\n"), fridge_difference/10.0); | |
379 fprintf_P(crc_stdout, PSTR("fridge_delay=%hu\n"), fridge_delay); | |
117 | 380 fprintf_P(crc_stdout, PSTR("fridge_status=%hhu\n"), is_fridge_on()); |
128
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381 fprintf_P(crc_stdout, PSTR("fridge_last_on=%lu\n"), fridge_on_clock.ticks); |
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diff
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382 fprintf_P(crc_stdout, PSTR("fridge_last_off=%lu\n"), fridge_off_clock.ticks); |
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diff
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383 fprintf_P(crc_stdout, PSTR("last_fridge=%hu\n"), last_fridge); |
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384 fprintf_P(crc_stdout, PSTR("last_wort=%hu\n"), last_wort); |
90
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385 fprintf_P(crc_stdout, PSTR("tick_secs=%d\n"), TICK); |
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386 fprintf_P(crc_stdout, PSTR("tick_wake=%d\n"), SLEEP_COMPARE); |
87 | 387 fprintf_P(crc_stdout, PSTR("maxsens=%hhu\n"), MAX_SENSORS); |
388 fprintf_P(crc_stdout, PSTR("totalmeas=%hu\n"), TOTAL_MEASUREMENTS); | |
81
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389 fprintf_P(crc_stdout, PSTR("sensors=%hhu\n"), n_sensors); |
15
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390 for (uint8_t s = 0; s < n_sensors; s++) |
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391 { |
81
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392 fprintf_P(crc_stdout, PSTR("sensor_id%hhu="), s); |
76
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diff
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393 printhex(sensor_id[s], ID_LEN, crc_stdout); |
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394 fputc('\n', crc_stdout); |
15
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395 } |
36
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diff
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396 fprintf_P(crc_stdout, PSTR("measurements=%hu\n"), n_measurements); |
14 | 397 for (uint16_t n = 0; n < n_measurements; n++) |
0 | 398 { |
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399 fprintf_P(crc_stdout, PSTR("meas%hu="), n); |
15
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400 for (uint8_t s = 0; s < n_sensors; s++) |
13 | 401 { |
80 | 402 fprintf_P(crc_stdout, PSTR(" %04hx"), get_measurement(s, n)); |
13 | 403 } |
20
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404 fputc('\n', crc_stdout); |
0 | 405 } |
20
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406 fprintf_P(crc_stdout, PSTR("END\n")); |
25
2943f62c8e62
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diff
changeset
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407 fprintf_P(stdout, PSTR("CRC=%hu\n"), crc_out); |
0 | 408 } |
409 | |
410 static void | |
411 cmd_clear() | |
412 { | |
7 | 413 n_measurements = 0; |
32 | 414 printf_P(PSTR("cleared\n")); |
0 | 415 } |
416 | |
417 static void | |
418 cmd_btoff() | |
419 { | |
93
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|
420 uint8_t rem; |
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421 uint16_t count_copy; |
59 | 422 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
423 { | |
93
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424 count_copy = comms_count; |
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425 rem = TCNT2; |
59 | 426 } |
93
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diff
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427 printf_P(PSTR("next_wake=%hu,"), comms_wake-count_copy); |
90
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428 printf_P(PSTR("rem=%hhu,"), rem); |
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429 printf_P(PSTR("tick_secs=%hhu,"), TICK); |
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430 printf_P(PSTR("tick_wake=%hhu\n"), SLEEP_COMPARE); |
46
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diff
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431 _delay_ms(100); |
16
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432 comms_timeout = 0; |
117 | 433 stay_awake = 0; |
0 | 434 } |
435 | |
436 static void | |
54
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437 cmd_reset() |
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438 { |
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439 printf_P(PSTR("reset\n")); |
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440 _delay_ms(100); |
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441 cli(); // disable interrupts |
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442 wdt_enable(WDTO_15MS); // enable watchdog |
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443 while(1); // wait for watchdog to reset processor |
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444 } |
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445 |
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446 static void |
12 | 447 cmd_measure() |
448 { | |
33 | 449 printf_P(PSTR("measuring\n")); |
12 | 450 need_measurement = 1; |
451 } | |
452 | |
453 static void | |
454 cmd_sensors() | |
455 { | |
456 uint8_t ret = simple_ds18b20_start_meas(NULL); | |
81
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457 printf_P(PSTR("All sensors, ret %hhu, waiting...\n"), ret); |
14 | 458 long_delay(DS18B20_TCONV_12BIT); |
12 | 459 simple_ds18b20_read_all(); |
460 } | |
461 | |
13 | 462 static void |
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463 init_sensors() |
13 | 464 { |
41 | 465 uint8_t id[OW_ROMCODE_SIZE]; |
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466 printf_P(PSTR("init sensors\n")); |
13 | 467 ow_reset(); |
41 | 468 for( uint8_t diff = OW_SEARCH_FIRST; diff != OW_LAST_DEVICE; ) |
469 { | |
470 diff = ow_rom_search( diff, &id[0] ); | |
471 if( diff == OW_PRESENCE_ERR ) { | |
472 printf_P( PSTR("No Sensor found\r") ); | |
473 return; | |
474 } | |
475 | |
476 if( diff == OW_DATA_ERR ) { | |
477 printf_P( PSTR("Bus Error\r") ); | |
478 return; | |
479 } | |
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480 |
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481 if (n_sensors < MAX_SENSORS) |
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482 { |
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483 memcpy(sensor_id[n_sensors], id, ID_LEN); |
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484 printf_P(PSTR("Added sensor %hhu : "), n_sensors); |
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485 printhex(id, ID_LEN, stdout); |
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486 putchar('\n'); |
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487 n_sensors++; |
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488 } |
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489 else |
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490 { |
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491 printf_P(PSTR("Too many sensors\n")); |
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492 } |
13 | 493 } |
80 | 494 |
495 max_measurements = TOTAL_MEASUREMENTS / n_sensors; | |
496 } | |
497 | |
498 static void | |
499 load_params() | |
500 { | |
501 uint16_t magic; | |
502 eeprom_read(magic, magic); | |
503 if (magic == EXPECT_MAGIC) | |
504 { | |
505 eeprom_read(measure_wake, measure_wake); | |
506 eeprom_read(comms_wake, comms_wake); | |
507 eeprom_read(wake_secs, wake_secs); | |
115 | 508 eeprom_read(fridge_setpoint, fridge_setpoint); |
509 eeprom_read(fridge_difference, fridge_difference); | |
510 eeprom_read(fridge_delay, fridge_delay); | |
80 | 511 } |
512 } | |
513 | |
514 static void | |
515 cmd_get_params() | |
516 { | |
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517 printf_P(PSTR("measure %hu\n"), measure_wake); |
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518 printf_P(PSTR("comms %hu\n"), comms_wake); |
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519 printf_P(PSTR("wake %hhu\n"), wake_secs); |
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520 printf_P(PSTR("tick %d\n"), TICK); |
116
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521 printf_P(PSTR("fridge %.1fº\n"), fridge_setpoint / 10.0f); |
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522 printf_P(PSTR("fridge difference %.1fº\n"), fridge_difference / 10.0f); |
115 | 523 printf_P(PSTR("fridge_delay %hu\n"), fridge_delay); |
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524 printf_P(PSTR("sensors %hhu (%hhu)\n"), |
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525 n_sensors, MAX_SENSORS); |
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526 printf_P(PSTR("meas %hu (%hu)\n"), |
80 | 527 max_measurements, TOTAL_MEASUREMENTS); |
13 | 528 } |
529 | |
530 static void | |
80 | 531 cmd_set_params(const char *params) |
13 | 532 { |
80 | 533 uint16_t new_measure_wake; |
534 uint16_t new_comms_wake; | |
535 uint8_t new_wake_secs; | |
116
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536 int ret = sscanf_P(params, PSTR("%hu %hu %hhu"), |
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537 &new_measure_wake, &new_comms_wake, &new_wake_secs); |
80 | 538 |
116
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539 if (ret != 3) |
13 | 540 { |
80 | 541 printf_P(PSTR("Bad values\n")); |
542 } | |
543 else | |
544 { | |
115 | 545 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
546 { | |
547 eeprom_write(new_measure_wake, measure_wake); | |
548 eeprom_write(new_comms_wake, comms_wake); | |
549 eeprom_write(new_wake_secs, wake_secs); | |
550 uint16_t magic = EXPECT_MAGIC; | |
551 eeprom_write(magic, magic); | |
552 } | |
80 | 553 printf_P(PSTR("set_params for next boot\n")); |
116
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554 printf_P(PSTR("measure %hu comms %hu wake %hhu\n"), |
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555 new_measure_wake, new_comms_wake, new_wake_secs); |
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556 } |
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557 } |
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558 |
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559 // returns true if eeprom was written |
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560 static bool |
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561 set_initial_eeprom() |
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562 { |
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563 uint16_t magic; |
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564 eeprom_read(magic, magic); |
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565 if (magic == EXPECT_MAGIC) |
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566 { |
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567 return false; |
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568 } |
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569 |
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570 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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571 { |
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572 eeprom_write(measure_wake, measure_wake); |
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573 eeprom_write(comms_wake, comms_wake); |
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574 eeprom_write(wake_secs, wake_secs); |
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575 eeprom_write(fridge_setpoint, fridge_setpoint); |
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576 eeprom_write(fridge_difference, fridge_difference); |
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577 eeprom_write(fridge_delay, fridge_delay); |
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578 magic = EXPECT_MAGIC; |
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579 eeprom_write(magic, magic); |
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580 } |
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581 |
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582 return true; |
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583 } |
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584 |
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585 static void |
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586 cmd_set_fridge_setpoint(char *params) |
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587 { |
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588 float new_f = atof(params); |
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589 if (new_f < 2 || new_f > 30) |
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590 { |
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591 printf_P(PSTR("Bad fridge value %f\n"), new_f); |
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592 return; |
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593 } |
114 | 594 |
121
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595 int16_t old_setpoint = fridge_setpoint; |
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596 |
116
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597 fridge_setpoint = new_f * 10; |
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598 bool written = set_initial_eeprom(); |
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599 if (!written) |
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600 { |
121
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601 if (old_setpoint != fridge_setpoint) |
116
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602 { |
121
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603 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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604 { |
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605 eeprom_write(fridge_setpoint, fridge_setpoint); |
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606 } |
116
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607 } |
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608 } |
121
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609 printf_P(PSTR("old fridge %.1fº new fridge %.1fº\n"), |
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610 old_setpoint / 10.0f, fridge_setpoint / 10.0f); |
116
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611 } |
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612 |
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613 static void |
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614 cmd_set_fridge_difference(char *params) |
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615 { |
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616 float new_f = atof(params); |
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617 if (new_f < 0 || new_f > 30) |
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618 { |
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619 printf_P(PSTR("Bad fridge value %f\n"), new_f); |
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620 return; |
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621 } |
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622 |
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623 fridge_difference = new_f * 10; |
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624 bool written = set_initial_eeprom(); |
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625 if (!written) |
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626 { |
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627 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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628 { |
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629 eeprom_write(fridge_difference, fridge_difference); |
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630 } |
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631 } |
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632 printf_P(PSTR("new fridge difference %.1fº\n"), fridge_difference / 10.0f); |
116
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633 } |
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634 |
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|
635 static void |
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636 cmd_set_fridge_delay(char *params) |
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637 { |
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638 uint16_t new_delay = atoi(params); |
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639 if (new_delay < 5) |
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640 { |
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641 printf_P(PSTR("Bad fridge delay %d\n"), new_delay); |
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642 return; |
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643 } |
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644 |
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645 fridge_delay = new_delay; |
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646 bool written = set_initial_eeprom(); |
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647 if (!written) |
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648 { |
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649 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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650 { |
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651 eeprom_write(fridge_delay, fridge_delay); |
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652 } |
114 | 653 } |
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654 printf_P(PSTR("new fridge delay %hu\n"), fridge_delay); |
80 | 655 } |
115 | 656 |
80 | 657 static void |
658 cmd_awake() | |
659 { | |
660 stay_awake = 1; | |
661 printf_P(PSTR("awake\n")); | |
13 | 662 } |
663 | |
12 | 664 static void |
0 | 665 read_handler() |
666 { | |
6 | 667 if (strcmp_P(readbuf, PSTR("fetch")) == 0) |
0 | 668 { |
669 cmd_fetch(); | |
670 } | |
6 | 671 else if (strcmp_P(readbuf, PSTR("clear")) == 0) |
0 | 672 { |
673 cmd_clear(); | |
674 } | |
6 | 675 else if (strcmp_P(readbuf, PSTR("btoff")) == 0) |
0 | 676 { |
677 cmd_btoff(); | |
678 } | |
12 | 679 else if (strcmp_P(readbuf, PSTR("measure")) == 0) |
680 { | |
681 cmd_measure(); | |
682 } | |
683 else if (strcmp_P(readbuf, PSTR("sensors")) == 0) | |
684 { | |
685 cmd_sensors(); | |
686 } | |
80 | 687 else if (strcmp_P(readbuf, PSTR("get_params")) == 0) |
688 { | |
689 cmd_get_params(); | |
690 } | |
83 | 691 else if (strncmp_P(readbuf, PSTR("set_params "), 11) == 0) |
80 | 692 { |
83 | 693 cmd_set_params(&readbuf[11]); |
80 | 694 } |
695 else if (strcmp_P(readbuf, PSTR("awake")) == 0) | |
696 { | |
697 cmd_awake(); | |
698 } | |
116
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699 else if (strncmp_P(readbuf, PSTR("fridge_setpoint "), 16) == 0) |
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700 { |
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701 cmd_set_fridge_setpoint(&readbuf[16]); |
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702 } |
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703 else if (strncmp_P(readbuf, PSTR("fridge_diff "), 12) == 0) |
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|
704 { |
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705 cmd_set_fridge_difference(&readbuf[12]); |
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|
706 } |
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707 else if (strncmp_P(readbuf, PSTR("fridge_delay "), 13) == 0) |
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708 { |
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709 cmd_set_fridge_delay(&readbuf[13]); |
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710 } |
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711 else if (strcmp_P(readbuf, PSTR("reset")) == 0) |
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712 { |
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|
713 cmd_reset(); |
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714 } |
0 | 715 else |
716 { | |
83 | 717 printf_P(PSTR("Bad command '%s'\n"), readbuf); |
0 | 718 } |
719 } | |
720 | |
20
878be5e353a0
Untested - calculate crc in uart_putchar
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parents:
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diff
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|
721 ISR(INT0_vect) |
18 | 722 { |
90
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diff
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|
723 button_pressed = 1; |
24
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|
724 blink(); |
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diff
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|
725 _delay_ms(100); |
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diff
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|
726 blink(); |
18 | 727 } |
728 | |
729 | |
2 | 730 ISR(USART_RX_vect) |
0 | 731 { |
2 | 732 char c = UDR0; |
33 | 733 #ifdef HAVE_UART_ECHO |
12 | 734 uart_putchar(c, NULL); |
33 | 735 #endif |
22
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736 if (c == '\r' || c == '\n') |
0 | 737 { |
22
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|
738 if (readpos > 0) |
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diff
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|
739 { |
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diff
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|
740 readbuf[readpos] = '\0'; |
27
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diff
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|
741 have_cmd = 1; |
22
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changeset
|
742 readpos = 0; |
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diff
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|
743 } |
0 | 744 } |
745 else | |
746 { | |
747 readbuf[readpos] = c; | |
748 readpos++; | |
749 if (readpos >= sizeof(readbuf)) | |
750 { | |
751 readpos = 0; | |
752 } | |
753 } | |
754 } | |
755 | |
2 | 756 ISR(TIMER2_COMPA_vect) |
1 | 757 { |
14 | 758 TCNT2 = 0; |
80 | 759 measure_count += TICK; |
760 comms_count += TICK; | |
16
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diff
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|
761 |
80 | 762 clock_epoch += TICK; |
17 | 763 |
16
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parents:
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diff
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|
764 if (comms_timeout != 0) |
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765 { |
80 | 766 comms_timeout -= TICK; |
16
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diff
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|
767 } |
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changeset
|
768 |
80 | 769 if (measure_count >= measure_wake) |
1 | 770 { |
4
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parents:
3
diff
changeset
|
771 measure_count = 0; |
1 | 772 need_measurement = 1; |
773 } | |
4
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diff
changeset
|
774 |
80 | 775 if (comms_count >= comms_wake) |
41 | 776 { |
777 comms_count = 0; | |
778 need_comms = 1; | |
779 } | |
1 | 780 } |
781 | |
782 static void | |
783 deep_sleep() | |
784 { | |
785 // p119 of manual | |
2 | 786 OCR2A = SLEEP_COMPARE; |
787 loop_until_bit_is_clear(ASSR, OCR2AUB); | |
1 | 788 |
789 set_sleep_mode(SLEEP_MODE_PWR_SAVE); | |
790 sleep_mode(); | |
791 } | |
792 | |
793 static void | |
4
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diff
changeset
|
794 idle_sleep() |
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diff
changeset
|
795 { |
54d369e3d689
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diff
changeset
|
796 set_sleep_mode(SLEEP_MODE_IDLE); |
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diff
changeset
|
797 sleep_mode(); |
54d369e3d689
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3
diff
changeset
|
798 } |
54d369e3d689
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diff
changeset
|
799 |
59 | 800 static uint16_t |
801 adc_vcc() | |
55
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parents:
54
diff
changeset
|
802 { |
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parents:
54
diff
changeset
|
803 PRR &= ~_BV(PRADC); |
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diff
changeset
|
804 |
62 | 805 // /16 prescaler |
55
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untested code to log voltage and internal temperature
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diff
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806 ADCSRA = _BV(ADEN) | _BV(ADPS2); |
8e897a682208
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diff
changeset
|
807 |
8e897a682208
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diff
changeset
|
808 // set to measure 1.1 reference |
58 | 809 ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1); |
60 | 810 // average a number of samples |
811 uint16_t sum = 0; | |
812 uint8_t num = 0; | |
813 for (uint8_t n = 0; n < 20; n++) | |
59 | 814 { |
815 ADCSRA |= _BV(ADSC); | |
816 loop_until_bit_is_clear(ADCSRA, ADSC); | |
55
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diff
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817 |
60 | 818 uint8_t low_11 = ADCL; |
819 uint8_t high_11 = ADCH; | |
820 uint16_t val = low_11 + (high_11 << 8); | |
6 | 821 |
60 | 822 if (n >= 4) |
823 { | |
824 sum += val; | |
825 num++; | |
826 } | |
827 } | |
828 ADCSRA = 0; | |
829 PRR |= _BV(PRADC); | |
6 | 830 |
80 | 831 //float res_volts = 1.1 * 1024 * num / sum; |
832 //return 1000 * res_volts; | |
833 return ((uint32_t)1100*1024*num) / sum; | |
6 | 834 } |
835 | |
4
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diff
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|
836 static void |
115 | 837 do_fridge() |
838 { | |
839 struct epoch_ticks now; | |
840 get_epoch_ticks(&now); | |
130
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diff
changeset
|
841 uint32_t off_time = now.ticks - fridge_off_clock.ticks; |
121
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|
842 bool wort_valid = last_wort != DS18X20_INVALID_DECICELSIUS; |
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diff
changeset
|
843 bool fridge_valid = last_fridge != DS18X20_INVALID_DECICELSIUS; |
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|
844 |
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|
845 int16_t wort_max = fridge_setpoint + fridge_difference; |
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846 int16_t wort_min = fridge_setpoint; |
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847 |
130
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changeset
|
848 // the fridge min/max only apply if the wort sensor is broken |
121
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|
849 int16_t fridge_min = fridge_setpoint - FRIDGE_AIR_MIN_RANGE; |
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850 int16_t fridge_max = fridge_setpoint + FRIDGE_AIR_MAX_RANGE; |
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|
851 |
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|
852 uint8_t fridge_on = PORT_FRIDGE & _BV(PIN_FRIDGE); |
130
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|
853 printf_P(PSTR("last_wort %hd (%hd, %hd), last_fridge %hd (%hd, %hd), setpoint %hd, diff %hd, fridge_on %hhu\n"), |
121
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|
854 last_wort, wort_min, wort_max, |
130
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changeset
|
855 last_fridge, fridge_min, fridge_max, |
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changeset
|
856 fridge_setpoint, fridge_difference, fridge_on); |
121
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|
857 |
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|
858 if (off_time < fridge_delay) |
115 | 859 { |
118
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diff
changeset
|
860 printf_P(PSTR("waiting for fridge delay current %hu, wait %hu\n"), |
121
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changeset
|
861 off_time, fridge_delay); |
115 | 862 return; |
863 } | |
864 | |
130
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diff
changeset
|
865 // handle failure of the wort sensor. if it is a short (intermittent?) |
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changeset
|
866 // failure we wait until it has been broken for a period of time |
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changeset
|
867 // (WORT_INVALID_TIME) before doing anything. |
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changeset
|
868 if (wort_valid) |
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changeset
|
869 { |
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diff
changeset
|
870 wort_valid_clock = now; |
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diff
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|
871 } |
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parents:
128
diff
changeset
|
872 else |
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
873 { |
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Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
874 printf_P(PSTR("wort sensor is invalid\n")); |
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Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
875 uint32_t invalid_time = now.ticks - wort_valid_clock.ticks; |
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diff
changeset
|
876 if (invalid_time < WORT_INVALID_TIME) |
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
877 { |
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
878 printf("only been invalid for %ld, waiting\n", invalid_time); |
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
879 return; |
66d5e15f40d0
simplify, only use the fridge temp if the wort's busted
Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
880 } |
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
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128
diff
changeset
|
881 } |
66d5e15f40d0
simplify, only use the fridge temp if the wort's busted
Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
882 |
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
883 if (!fridge_valid) |
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
884 { |
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
885 printf_P(PSTR("fridge sensor is invalid\n")); |
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Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
886 } |
115 | 887 |
888 if (fridge_on) | |
889 { | |
121
45c051a7db82
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parents:
118
diff
changeset
|
890 bool turn_off = false; |
45c051a7db82
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Matt Johnston <matt@ucc.asn.au>
parents:
118
diff
changeset
|
891 uint16_t on_time = now.ticks - fridge_on_clock.ticks; |
45c051a7db82
try and take account of the fridge temperature too
Matt Johnston <matt@ucc.asn.au>
parents:
118
diff
changeset
|
892 |
130
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
893 uint16_t overshoot = 0; |
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
894 if (on_time > 1800) |
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
895 { |
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simplify, only use the fridge temp if the wort's busted
Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
896 // *10.0f for decicelcius |
66d5e15f40d0
simplify, only use the fridge temp if the wort's busted
Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
897 overshoot = OVERSHOOT_FACTOR * 10.0f * MIN(3600, on_time) / 3600.0; |
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
898 } |
128
fbb076bf2a59
fix stupid bugs - lack of PSTR, MIN not MAX
Matt Johnston <matt@ucc.asn.au>
parents:
127
diff
changeset
|
899 |
fbb076bf2a59
fix stupid bugs - lack of PSTR, MIN not MAX
Matt Johnston <matt@ucc.asn.au>
parents:
127
diff
changeset
|
900 printf_P(PSTR("on_time %hu, overshoot %hu\n"), on_time, overshoot); |
121
45c051a7db82
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Matt Johnston <matt@ucc.asn.au>
parents:
118
diff
changeset
|
901 |
45c051a7db82
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Matt Johnston <matt@ucc.asn.au>
parents:
118
diff
changeset
|
902 // wort has cooled enough. will probably cool a bit more by itself |
130
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
903 if (wort_valid) |
121
45c051a7db82
try and take account of the fridge temperature too
Matt Johnston <matt@ucc.asn.au>
parents:
118
diff
changeset
|
904 { |
130
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
905 if ((last_wort - overshoot) < fridge_setpoint) |
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
906 { |
66d5e15f40d0
simplify, only use the fridge temp if the wort's busted
Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
907 printf_P(PSTR("wort has cooled enough, overshoot %hu on_time %hu\n"), overshoot, on_time); |
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
908 turn_off = true; |
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
909 } |
121
45c051a7db82
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Matt Johnston <matt@ucc.asn.au>
parents:
118
diff
changeset
|
910 } |
130
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
911 else |
121
45c051a7db82
try and take account of the fridge temperature too
Matt Johnston <matt@ucc.asn.au>
parents:
118
diff
changeset
|
912 { |
130
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
913 if (fridge_valid && last_fridge < fridge_min) |
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
914 { |
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
915 printf_P(PSTR("fridge off fallback\n")); |
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
916 turn_off = true; |
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
917 } |
121
45c051a7db82
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Matt Johnston <matt@ucc.asn.au>
parents:
118
diff
changeset
|
918 } |
45c051a7db82
try and take account of the fridge temperature too
Matt Johnston <matt@ucc.asn.au>
parents:
118
diff
changeset
|
919 |
45c051a7db82
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Matt Johnston <matt@ucc.asn.au>
parents:
118
diff
changeset
|
920 if (turn_off) |
115 | 921 { |
922 // too cold, turn off | |
118
bb0c946460f3
a bit more logging. make printf floats work
Matt Johnston <matt@ucc.asn.au>
parents:
117
diff
changeset
|
923 printf_P(PSTR("Turning fridge off\n")); |
115 | 924 PORT_FRIDGE &= ~_BV(PIN_FRIDGE); |
925 fridge_off_clock = now; | |
926 } | |
927 } | |
928 else | |
929 { | |
121
45c051a7db82
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Matt Johnston <matt@ucc.asn.au>
parents:
118
diff
changeset
|
930 bool turn_on = false; |
45c051a7db82
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Matt Johnston <matt@ucc.asn.au>
parents:
118
diff
changeset
|
931 |
130
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
932 if (wort_valid) |
127 | 933 { |
130
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
934 if (last_wort >= wort_max) |
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
935 { |
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
936 printf_P(PSTR("wort is too hot\n")); |
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
937 turn_on = true; |
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
938 } |
127 | 939 } |
130
66d5e15f40d0
simplify, only use the fridge temp if the wort's busted
Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
940 else |
121
45c051a7db82
try and take account of the fridge temperature too
Matt Johnston <matt@ucc.asn.au>
parents:
118
diff
changeset
|
941 { |
130
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
942 if (fridge_valid && last_fridge >= fridge_max) |
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
943 { |
66d5e15f40d0
simplify, only use the fridge temp if the wort's busted
Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
944 printf_P(PSTR("fridge on fallback\n")); |
66d5e15f40d0
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Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
945 turn_on = true; |
66d5e15f40d0
simplify, only use the fridge temp if the wort's busted
Matt Johnston <matt@ucc.asn.au>
parents:
128
diff
changeset
|
946 } |
121
45c051a7db82
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Matt Johnston <matt@ucc.asn.au>
parents:
118
diff
changeset
|
947 } |
45c051a7db82
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Matt Johnston <matt@ucc.asn.au>
parents:
118
diff
changeset
|
948 |
45c051a7db82
try and take account of the fridge temperature too
Matt Johnston <matt@ucc.asn.au>
parents:
118
diff
changeset
|
949 if (turn_on) |
115 | 950 { |
951 // too hot, turn on | |
118
bb0c946460f3
a bit more logging. make printf floats work
Matt Johnston <matt@ucc.asn.au>
parents:
117
diff
changeset
|
952 printf_P(PSTR("Turning fridge on\n")); |
115 | 953 PORT_FRIDGE |= _BV(PIN_FRIDGE); |
121
45c051a7db82
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Matt Johnston <matt@ucc.asn.au>
parents:
118
diff
changeset
|
954 fridge_on_clock = now; |
115 | 955 } |
956 } | |
957 } | |
958 | |
959 static void | |
1 | 960 do_measurement() |
961 { | |
75
ca08442635ca
report raw ds18b20 values instead
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
962 blink(); |
ca08442635ca
report raw ds18b20 values instead
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
963 |
90
a1c1c2d475b0
print the remainder of timers as well
Matt Johnston <matt@ucc.asn.au>
parents:
89
diff
changeset
|
964 /* Take the timer here since deep_sleep() below could take 6 seconds */ |
a1c1c2d475b0
print the remainder of timers as well
Matt Johnston <matt@ucc.asn.au>
parents:
89
diff
changeset
|
965 get_epoch_ticks(&last_measurement_clock); |
a1c1c2d475b0
print the remainder of timers as well
Matt Johnston <matt@ucc.asn.au>
parents:
89
diff
changeset
|
966 if (n_measurements == 0) |
a1c1c2d475b0
print the remainder of timers as well
Matt Johnston <matt@ucc.asn.au>
parents:
89
diff
changeset
|
967 { |
a1c1c2d475b0
print the remainder of timers as well
Matt Johnston <matt@ucc.asn.au>
parents:
89
diff
changeset
|
968 first_measurement_clock = last_measurement_clock; |
a1c1c2d475b0
print the remainder of timers as well
Matt Johnston <matt@ucc.asn.au>
parents:
89
diff
changeset
|
969 } |
a1c1c2d475b0
print the remainder of timers as well
Matt Johnston <matt@ucc.asn.au>
parents:
89
diff
changeset
|
970 |
55
8e897a682208
untested code to log voltage and internal temperature
Matt Johnston <matt@ucc.asn.au>
parents:
54
diff
changeset
|
971 simple_ds18b20_start_meas(NULL); |
59 | 972 // sleep rather than using a long delay |
117 | 973 idle_sleep(); |
59 | 974 //_delay_ms(DS18B20_TCONV_12BIT); |
13 | 975 |
80 | 976 if (n_measurements == max_measurements) |
13 | 977 { |
978 n_measurements = 0; | |
979 } | |
6 | 980 |
80 | 981 for (uint8_t s = 0; s < n_sensors; s++) |
13 | 982 { |
75
ca08442635ca
report raw ds18b20 values instead
Matt Johnston <matt@ucc.asn.au>
parents:
62
diff
changeset
|
983 uint16_t reading; |
80 | 984 uint8_t ret = simple_ds18b20_read_raw(sensor_id[s], &reading); |
985 if (ret != DS18X20_OK) | |
13 | 986 { |
80 | 987 reading = VALUE_BROKEN; |
13 | 988 } |
80 | 989 set_measurement(s, n_measurements, reading); |
115 | 990 |
991 if (memcmp(sensor_id[s], fridge_id, sizeof(fridge_id)) == 0) | |
992 { | |
121
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Matt Johnston <matt@ucc.asn.au>
parents:
118
diff
changeset
|
993 last_fridge = ds18b20_raw16_to_decicelsius(reading); |
115 | 994 } |
995 if (memcmp(sensor_id[s], wort_id, sizeof(wort_id)) == 0) | |
996 { | |
121
45c051a7db82
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Matt Johnston <matt@ucc.asn.au>
parents:
118
diff
changeset
|
997 last_wort = ds18b20_raw16_to_decicelsius(reading); |
115 | 998 } |
13 | 999 } |
22
885532437100
A bit of work on the server python
Matt Johnston <matt@ucc.asn.au>
parents:
20
diff
changeset
|
1000 |
14 | 1001 n_measurements++; |
1 | 1002 } |
1003 | |
4
54d369e3d689
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Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
1004 static void |
54d369e3d689
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Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
1005 do_comms() |
54d369e3d689
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Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
1006 { |
90
a1c1c2d475b0
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Matt Johnston <matt@ucc.asn.au>
parents:
89
diff
changeset
|
1007 get_epoch_ticks(&last_comms_clock); |
a1c1c2d475b0
print the remainder of timers as well
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
1008 |
41 | 1009 // turn on bluetooth |
24
44c5ab5ea879
- some fixes for server code
Matt Johnston <matt@ucc.asn.au>
parents:
22
diff
changeset
|
1010 set_aux_power(1); |
89
51d889ad39a3
main.c : add a delay before turning on uart
Matt Johnston <matt@ucc.asn.au>
parents:
87
diff
changeset
|
1011 // avoid receiving rubbish, perhaps |
51d889ad39a3
main.c : add a delay before turning on uart
Matt Johnston <matt@ucc.asn.au>
parents:
87
diff
changeset
|
1012 _delay_ms(50); |
7 | 1013 uart_on(); |
41 | 1014 |
1015 // write sd card here? same 3.3v regulator... | |
1016 | |
80 | 1017 for (comms_timeout = wake_secs; |
1018 comms_timeout > 0 || stay_awake; | |
1019 ) | |
41 | 1020 { |
6 | 1021 if (need_measurement) |
1022 { | |
14 | 1023 need_measurement = 0; |
6 | 1024 do_measurement(); |
115 | 1025 do_fridge(); |
44 | 1026 continue; |
6 | 1027 } |
1028 | |
27
dbbd503119ba
Add some web server handling
Matt Johnston <matt@ucc.asn.au>
parents:
26
diff
changeset
|
1029 if (have_cmd) |
dbbd503119ba
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Matt Johnston <matt@ucc.asn.au>
parents:
26
diff
changeset
|
1030 { |
dbbd503119ba
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Matt Johnston <matt@ucc.asn.au>
parents:
26
diff
changeset
|
1031 have_cmd = 0; |
dbbd503119ba
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Matt Johnston <matt@ucc.asn.au>
parents:
26
diff
changeset
|
1032 read_handler(); |
44 | 1033 continue; |
27
dbbd503119ba
Add some web server handling
Matt Johnston <matt@ucc.asn.au>
parents:
26
diff
changeset
|
1034 } |
dbbd503119ba
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Matt Johnston <matt@ucc.asn.au>
parents:
26
diff
changeset
|
1035 |
16
5075d8c428bd
untested, add comms timeout code
Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
1036 // wait for commands from the master |
41 | 1037 idle_sleep(); |
1038 } | |
4
54d369e3d689
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
1039 |
6 | 1040 uart_off(); |
46
9ccd965d938a
Use the PRR etc, set value to proper ones
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
1041 // 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
|
1042 _delay_ms(100); |
16
5075d8c428bd
untested, add comms timeout code
Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
1043 set_aux_power(0); |
4
54d369e3d689
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Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
1044 } |
54d369e3d689
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Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
1045 |
7 | 1046 static void |
1047 blink() | |
1048 { | |
1049 PORT_LED &= ~_BV(PIN_LED); | |
9 | 1050 _delay_ms(1); |
7 | 1051 PORT_LED |= _BV(PIN_LED); |
1052 } | |
1053 | |
1054 static void | |
1055 long_delay(int ms) | |
1056 { | |
1057 int iter = ms / 100; | |
1058 | |
1059 for (int i = 0; i < iter; i++) | |
1060 { | |
1061 _delay_ms(100); | |
1062 } | |
1063 } | |
1064 | |
8 | 1065 ISR(BADISR_vect) |
1066 { | |
14 | 1067 //uart_on(); |
8 | 1068 printf_P(PSTR("Bad interrupt\n")); |
1069 } | |
1070 | |
0 | 1071 int main(void) |
1072 { | |
16
5075d8c428bd
untested, add comms timeout code
Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
1073 setup_chip(); |
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1074 blink(); |
9 | 1075 |
16
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1076 set_aux_power(0); |
7 | 1077 |
6 | 1078 stdout = &mystdout; |
7 | 1079 uart_on(); |
1080 | |
16
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1081 printf(PSTR("Started.\n")); |
13 | 1082 |
80 | 1083 load_params(); |
13 | 1084 |
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1085 init_sensors(); |
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1086 |
8 | 1087 uart_off(); |
0 | 1088 |
6 | 1089 // turn off everything except timer2 |
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1090 PRR = _BV(PRTWI) | _BV(PRTIM0) | _BV(PRTIM1) | _BV(PRSPI) | _BV(PRUSART0) | _BV(PRADC); |
8 | 1091 |
16
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1092 setup_tick_counter(); |
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1093 |
12 | 1094 sei(); |
8 | 1095 |
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1096 need_comms = 1; |
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1097 need_measurement = 1; |
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1098 |
117 | 1099 stay_awake = 1; |
1100 | |
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1101 for(;;) |
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1102 { |
90
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1103 if (button_pressed) |
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1104 { |
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1105 // debounce |
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1106 _delay_ms(200); |
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1107 need_comms = 1; |
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1108 comms_timeout = wake_secs; |
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1109 button_pressed = 0; |
41 | 1110 continue; |
1 | 1111 } |
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1112 |
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1113 if (need_comms) |
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1114 { |
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1115 need_comms = 0; |
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1116 do_comms(); |
41 | 1117 continue; |
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1118 } |
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1119 |
97 | 1120 if (need_measurement) |
1121 { | |
1122 need_measurement = 0; | |
1123 do_measurement(); | |
115 | 1124 do_fridge(); |
97 | 1125 continue; |
1126 } | |
1127 | |
41 | 1128 deep_sleep(); |
0 | 1129 } |
12 | 1130 |
0 | 1131 return 0; /* never reached */ |
1132 } |