Mercurial > templog
annotate main.c @ 393:afce71f829d6
- log more details
- less silly way to load localconfig
author | Matt Johnston <matt@ucc.asn.au> |
---|---|
date | Thu, 12 Jul 2012 23:44:20 +0800 |
parents | 5e3880342390 |
children | 51d889ad39a3 |
rev | line source |
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306 | 1 #include <stdio.h> |
2 #include <string.h> | |
319 | 3 #include <stddef.h> |
307 | 4 #include <avr/io.h> |
5 #include <avr/interrupt.h> | |
6 #include <avr/sleep.h> | |
313 | 7 #include <util/delay.h> |
312 | 8 #include <avr/pgmspace.h> |
319 | 9 #include <avr/eeprom.h> |
360
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10 #include <avr/wdt.h> |
365 | 11 #include <util/atomic.h> |
306 | 12 #include <util/crc16.h> |
13 | |
318 | 14 // for DWORD of get_fattime() |
309 | 15 #include "integer.h" |
318 | 16 |
17 #include "simple_ds18b20.h" | |
319 | 18 #include "onewire.h" |
309 | 19 |
306 | 20 // configuration params |
21 // - measurement interval | |
22 // - transmit interval | |
23 // - bluetooth params | |
24 // - number of sensors (and range?) | |
25 | |
386 | 26 // TICK should be 8 or less (8 untested). all timers need |
27 // to be a multiple. | |
28 | |
29 #define TICK 6 | |
30 // we have 1024 prescaler, 32768 crystal. | |
31 #define SLEEP_COMPARE (32*TICK-1) | |
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32 |
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33 #define VALUE_NOSENSOR 0x07D0 // 125 degrees |
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34 #define VALUE_BROKEN 0x07D1 // 125.0625 |
319 | 35 |
316 | 36 #define BAUD 19200 |
313 | 37 #define UBRR ((F_CPU)/8/(BAUD)-1) |
38 | |
39 #define PORT_LED PORTC | |
40 #define DDR_LED DDRC | |
41 #define PIN_LED PC4 | |
307 | 42 |
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43 #define PORT_SHDN PORTD |
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44 #define DDR_SHDN DDRD |
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45 #define PIN_SHDN PD7 |
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46 |
386 | 47 // total amount of 16bit values available for measurements. |
48 // adjust emperically, be sure to allow enough stack space too | |
49 #define TOTAL_MEASUREMENTS 840 | |
50 | |
51 // each sensor slot uses 8 bytes | |
52 #define MAX_SENSORS 6 | |
312 | 53 |
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54 // fixed at 8, have a shorter name |
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55 #define ID_LEN OW_ROMCODE_SIZE |
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56 |
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57 // #define HAVE_UART_ECHO |
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58 |
386 | 59 // eeprom-settable parameters. all timeouts should |
60 // be a multiple of TICK (6 seconds probably) | |
61 static uint16_t measure_wake = 120; | |
62 static uint16_t comms_wake = 3600; | |
63 static uint8_t wake_secs = 30; | |
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64 |
365 | 65 // ---- Atomic guards required accessing these variables |
66 static uint32_t clock_epoch; | |
67 static uint16_t comms_count; | |
68 static uint16_t measure_count; | |
69 // ---- End atomic guards required | |
70 | |
323 | 71 static uint16_t n_measurements; |
365 | 72 |
386 | 73 // calculated at startup as TOTAL_MEASUREMENTS/n_sensors |
74 static uint16_t max_measurements; | |
75 | |
76 static uint16_t measurements[TOTAL_MEASUREMENTS]; | |
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77 static uint32_t first_measurement_clock; |
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78 // last_measurement_clock is redundant but checks that we're not missing |
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79 // samples |
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80 static uint32_t last_measurement_clock; |
306 | 81 |
365 | 82 static uint32_t last_comms_clock; |
83 | |
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84 // boolean flags |
323 | 85 static uint8_t need_measurement; |
86 static uint8_t need_comms; | |
346 | 87 static uint8_t uart_enabled; |
386 | 88 static uint8_t stay_awake; |
307 | 89 |
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90 // counts down from WAKE_SECS to 0, goes to deep sleep when hits 0 |
323 | 91 static uint8_t comms_timeout; |
307 | 92 |
323 | 93 static uint8_t readpos; |
306 | 94 static char readbuf[30]; |
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95 static uint8_t have_cmd; |
306 | 96 |
386 | 97 static uint8_t n_sensors; |
98 static uint8_t sensor_id[MAX_SENSORS][ID_LEN]; | |
99 | |
100 | |
101 int uart_putchar(char c, FILE *stream); | |
102 static void long_delay(int ms); | |
103 static void blink(); | |
104 static uint16_t adc_vcc(); | |
105 | |
106 static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL, | |
107 _FDEV_SETUP_WRITE); | |
108 | |
109 static uint16_t crc_out; | |
110 static FILE _crc_stdout = FDEV_SETUP_STREAM(uart_putchar, NULL, | |
111 _FDEV_SETUP_WRITE); | |
112 // convenience | |
113 static FILE *crc_stdout = &_crc_stdout; | |
114 | |
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115 |
319 | 116 // thanks to http://projectgus.com/2010/07/eeprom-access-with-arduino/ |
117 #define eeprom_read_to(dst_p, eeprom_field, dst_size) eeprom_read_block((dst_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (dst_size)) | |
118 #define eeprom_read(dst, eeprom_field) eeprom_read_to((&dst), eeprom_field, sizeof(dst)) | |
119 #define eeprom_write_from(src_p, eeprom_field, src_size) eeprom_write_block((src_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (src_size)) | |
120 #define eeprom_write(src, eeprom_field) { eeprom_write_from(&src, eeprom_field, sizeof(src)); } | |
121 | |
122 #define EXPECT_MAGIC 0x67c9 | |
123 | |
124 struct __attribute__ ((__packed__)) __eeprom_data { | |
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125 // XXX eeprom unused at present |
319 | 126 uint16_t magic; |
386 | 127 uint16_t measure_wake; |
128 uint16_t comms_wake; | |
129 uint8_t wake_secs; | |
319 | 130 }; |
131 | |
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132 static void deep_sleep(); |
307 | 133 |
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134 // Very first setup |
324 | 135 static void |
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136 setup_chip() |
324 | 137 { |
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138 cli(); |
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139 |
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140 // stop watchdog timer (might have been used to cause a reset) |
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141 wdt_reset(); |
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142 MCUSR &= ~_BV(WDRF); |
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143 WDTCSR |= _BV(WDCE) | _BV(WDE); |
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144 WDTCSR = 0; |
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145 |
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146 // Set clock to 2mhz |
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147 CLKPR = _BV(CLKPCE); |
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148 // divide by 4 |
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149 CLKPR = _BV(CLKPS1); |
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150 |
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151 // enable pullups |
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152 PORTB = 0xff; // XXX change when using SPI |
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153 PORTD = 0xff; |
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154 PORTC = 0xff; |
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155 |
325 | 156 // 3.3v power for bluetooth and SD |
322
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157 DDR_LED |= _BV(PIN_LED); |
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158 DDR_SHDN |= _BV(PIN_SHDN); |
325 | 159 |
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160 // set pullup |
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161 PORTD |= _BV(PD2); |
347 | 162 // INT0 setup |
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163 EICRA = (1<<ISC01); // falling edge - data sheet says it won't work? |
347 | 164 EIMSK = _BV(INT0); |
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165 |
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166 // comparator disable |
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167 ACSR = _BV(ACD); |
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168 |
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169 // disable adc pin input buffers |
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170 DIDR0 = 0x3F; // acd0-adc5 |
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171 DIDR1 = (1<<AIN1D)|(1<<AIN0D); // ain0/ain1 |
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172 |
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173 sei(); |
324 | 174 } |
175 | |
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176 static void |
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177 set_aux_power(uint8_t on) |
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178 { |
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179 if (on) |
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180 { |
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181 PORT_SHDN &= ~_BV(PIN_SHDN); |
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182 } |
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183 else |
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184 { |
349 | 185 PORT_SHDN |= _BV(PIN_SHDN); |
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186 } |
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187 } |
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188 |
386 | 189 static void |
190 set_measurement(uint8_t sensor, uint16_t measurement, uint16_t reading) | |
191 { | |
192 measurements[sensor*max_measurements + measurement] = reading; | |
193 } | |
194 | |
195 static uint16_t | |
196 get_measurement(uint8_t sensor, uint16_t measurement) | |
197 { | |
198 return measurements[sensor*max_measurements + measurement]; | |
199 } | |
200 | |
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201 static void |
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202 setup_tick_counter() |
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203 { |
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204 // set up counter2. |
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205 // COM21 COM20 Set OC2 on Compare Match (p116) |
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206 // WGM21 Clear counter on compare |
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207 //TCCR2A = _BV(COM2A1) | _BV(COM2A0) | _BV(WGM21); |
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208 // toggle on match |
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209 TCCR2A = _BV(COM2A0); |
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210 // CS22 CS21 CS20 clk/1024 |
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211 TCCR2B = _BV(CS22) | _BV(CS21) | _BV(CS20); |
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212 // set async mode |
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213 ASSR |= _BV(AS2); |
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214 TCNT2 = 0; |
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215 OCR2A = SLEEP_COMPARE; |
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216 // interrupt |
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217 TIMSK2 = _BV(OCIE2A); |
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218 } |
324 | 219 |
306 | 220 static void |
313 | 221 uart_on() |
306 | 222 { |
314 | 223 // Power reduction register |
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224 PRR &= ~_BV(PRUSART0); |
314 | 225 |
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226 // All of this needs to be done each time after turning off the PRR |
306 | 227 // baud rate |
313 | 228 UBRR0H = (unsigned char)(UBRR >> 8); |
229 UBRR0L = (unsigned char)UBRR; | |
230 // set 2x clock, improves accuracy of UBRR | |
231 UCSR0A |= _BV(U2X0); | |
312 | 232 UCSR0B = _BV(RXCIE0) | _BV(RXEN0) | _BV(TXEN0); |
306 | 233 //8N1 |
313 | 234 UCSR0C = _BV(UCSZ01) | _BV(UCSZ00); |
347 | 235 uart_enabled = 1; |
312 | 236 } |
237 | |
238 static void | |
239 uart_off() | |
240 { | |
241 // Turn of interrupts and disable tx/rx | |
242 UCSR0B = 0; | |
347 | 243 uart_enabled = 0; |
312 | 244 |
245 // Power reduction register | |
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246 PRR |= _BV(PRUSART0); |
306 | 247 } |
248 | |
316 | 249 int |
306 | 250 uart_putchar(char c, FILE *stream) |
251 { | |
347 | 252 if (!uart_enabled) |
253 { | |
254 return EOF; | |
255 } | |
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256 // XXX could perhaps sleep in the loop for power. |
314 | 257 if (c == '\n') |
258 { | |
316 | 259 loop_until_bit_is_set(UCSR0A, UDRE0); |
326
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260 UDR0 = '\r'; |
314 | 261 } |
308 | 262 loop_until_bit_is_set(UCSR0A, UDRE0); |
263 UDR0 = c; | |
326
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264 if (stream == crc_stdout) |
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265 { |
332
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266 crc_out = _crc_ccitt_update(crc_out, c); |
326
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267 } |
316 | 268 if (c == '\r') |
269 { | |
270 loop_until_bit_is_set(UCSR0A, UDRE0); | |
326
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271 UDR0 = '\n'; |
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272 if (stream == crc_stdout) |
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273 { |
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274 crc_out = _crc_ccitt_update(crc_out, '\n'); |
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275 } |
316 | 276 } |
346 | 277 return (unsigned char)c; |
306 | 278 } |
279 | |
280 static void | |
281 cmd_fetch() | |
282 { | |
326
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283 crc_out = 0; |
361
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284 |
387
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285 fprintf_P(crc_stdout, PSTR("START\n")); |
365 | 286 { |
387
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287 uint32_t epoch_copy; |
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288 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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289 { |
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290 epoch_copy = clock_epoch; |
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291 } |
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292 fprintf_P(crc_stdout, PSTR("now=%lu\n"), epoch_copy); |
365 | 293 } |
387
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294 fprintf_P(crc_stdout, PSTR("time_step=%hu\n"), measure_wake); |
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295 fprintf_P(crc_stdout, PSTR("first_time=%lu\n"), first_measurement_clock); |
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296 fprintf_P(crc_stdout, PSTR("last_time=%lu\n"), last_measurement_clock); |
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297 fprintf_P(crc_stdout, PSTR("comms_time=%lu\n"), last_comms_clock); |
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298 fprintf_P(crc_stdout, PSTR("voltage=%hu\n"), adc_vcc()); |
393 | 299 fprintf_P(crc_stdout, PSTR("measure=%hu\n"), measure_wake); |
300 fprintf_P(crc_stdout, PSTR("comms=%hu\n"), comms_wake); | |
301 fprintf_P(crc_stdout, PSTR("wake=%hhu\n"), wake_secs); | |
302 fprintf_P(crc_stdout, PSTR("tick=%d\n"), TICK); | |
303 fprintf_P(crc_stdout, PSTR("maxsens=%hhu\n"), MAX_SENSORS); | |
304 fprintf_P(crc_stdout, PSTR("totalmeas=%hu\n"), TOTAL_MEASUREMENTS); | |
387
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305 fprintf_P(crc_stdout, PSTR("sensors=%hhu\n"), n_sensors); |
321
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306 for (uint8_t s = 0; s < n_sensors; s++) |
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307 { |
387
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308 fprintf_P(crc_stdout, PSTR("sensor_id%hhu="), s); |
382
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309 printhex(sensor_id[s], ID_LEN, crc_stdout); |
326
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310 fputc('\n', crc_stdout); |
321
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311 } |
341
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312 fprintf_P(crc_stdout, PSTR("measurements=%hu\n"), n_measurements); |
320 | 313 for (uint16_t n = 0; n < n_measurements; n++) |
306 | 314 { |
352
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315 fprintf_P(crc_stdout, PSTR("meas%hu="), n); |
321
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316 for (uint8_t s = 0; s < n_sensors; s++) |
319 | 317 { |
386 | 318 fprintf_P(crc_stdout, PSTR(" %04hx"), get_measurement(s, n)); |
319 | 319 } |
326
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320 fputc('\n', crc_stdout); |
306 | 321 } |
326
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322 fprintf_P(crc_stdout, PSTR("END\n")); |
331
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323 fprintf_P(stdout, PSTR("CRC=%hu\n"), crc_out); |
306 | 324 } |
325 | |
326 static void | |
327 cmd_clear() | |
328 { | |
313 | 329 n_measurements = 0; |
338 | 330 printf_P(PSTR("cleared\n")); |
306 | 331 } |
332 | |
333 static void | |
334 cmd_btoff() | |
335 { | |
365 | 336 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
337 { | |
338 comms_count = 0; | |
339 } | |
386 | 340 printf_P(PSTR("off:%hu\n"), comms_wake); |
352
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341 _delay_ms(100); |
322
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342 comms_timeout = 0; |
306 | 343 } |
344 | |
345 static void | |
360
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346 cmd_reset() |
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347 { |
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348 printf_P(PSTR("reset\n")); |
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349 _delay_ms(100); |
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350 cli(); // disable interrupts |
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351 wdt_enable(WDTO_15MS); // enable watchdog |
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352 while(1); // wait for watchdog to reset processor |
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353 } |
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354 |
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355 static void |
318 | 356 cmd_measure() |
357 { | |
339
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358 printf_P(PSTR("measuring\n")); |
318 | 359 need_measurement = 1; |
360 } | |
361 | |
362 static void | |
363 cmd_sensors() | |
364 { | |
365 uint8_t ret = simple_ds18b20_start_meas(NULL); | |
387
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366 printf_P(PSTR("All sensors, ret %hhu, waiting...\n"), ret); |
320 | 367 long_delay(DS18B20_TCONV_12BIT); |
318 | 368 simple_ds18b20_read_all(); |
369 } | |
370 | |
319 | 371 static void |
382
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372 init_sensors() |
319 | 373 { |
347 | 374 uint8_t id[OW_ROMCODE_SIZE]; |
382
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375 printf_P(PSTR("init sensors\n")); |
319 | 376 ow_reset(); |
347 | 377 for( uint8_t diff = OW_SEARCH_FIRST; diff != OW_LAST_DEVICE; ) |
378 { | |
379 diff = ow_rom_search( diff, &id[0] ); | |
380 if( diff == OW_PRESENCE_ERR ) { | |
381 printf_P( PSTR("No Sensor found\r") ); | |
382 return; | |
383 } | |
384 | |
385 if( diff == OW_DATA_ERR ) { | |
386 printf_P( PSTR("Bus Error\r") ); | |
387 return; | |
388 } | |
382
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389 |
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390 if (n_sensors < MAX_SENSORS) |
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391 { |
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392 memcpy(sensor_id[n_sensors], id, ID_LEN); |
387
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393 printf_P(PSTR("Added sensor %hhu : "), n_sensors); |
382
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394 printhex(id, ID_LEN, stdout); |
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395 putchar('\n'); |
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396 n_sensors++; |
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397 } |
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398 else |
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399 { |
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400 printf_P(PSTR("Too many sensors\n")); |
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401 } |
319 | 402 } |
386 | 403 |
404 max_measurements = TOTAL_MEASUREMENTS / n_sensors; | |
405 } | |
406 | |
407 static void | |
408 load_params() | |
409 { | |
410 uint16_t magic; | |
411 eeprom_read(magic, magic); | |
412 if (magic == EXPECT_MAGIC) | |
413 { | |
414 eeprom_read(measure_wake, measure_wake); | |
415 eeprom_read(comms_wake, comms_wake); | |
416 eeprom_read(wake_secs, wake_secs); | |
417 } | |
418 } | |
419 | |
420 static void | |
421 cmd_get_params() | |
422 { | |
387
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423 printf_P(PSTR("measure %hu\n"), measure_wake); |
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424 printf_P(PSTR("comms %hu\n"), comms_wake); |
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425 printf_P(PSTR("wake %hhu\n"), wake_secs); |
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426 printf_P(PSTR("tick %d\n"), TICK); |
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427 printf_P(PSTR("sensors %hhu (%hhu)\n"), |
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428 n_sensors, MAX_SENSORS); |
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429 printf_P(PSTR("meas %hu (%hu)\n"), |
386 | 430 max_measurements, TOTAL_MEASUREMENTS); |
319 | 431 } |
432 | |
433 static void | |
386 | 434 cmd_set_params(const char *params) |
319 | 435 { |
386 | 436 uint16_t new_measure_wake; |
437 uint16_t new_comms_wake; | |
438 uint8_t new_wake_secs; | |
387
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439 int ret = sscanf_P(params, PSTR("%hu %hu %hhu"), |
386 | 440 &new_measure_wake, &new_comms_wake, &new_wake_secs); |
441 | |
442 if (ret != 3) | |
319 | 443 { |
386 | 444 printf_P(PSTR("Bad values\n")); |
445 } | |
446 else | |
447 { | |
320 | 448 cli(); |
386 | 449 eeprom_write(new_measure_wake, measure_wake); |
450 eeprom_write(new_comms_wake, comms_wake); | |
451 eeprom_write(new_wake_secs, wake_secs); | |
452 uint16_t magic = EXPECT_MAGIC; | |
320 | 453 eeprom_write(magic, magic); |
454 sei(); | |
386 | 455 printf_P(PSTR("set_params for next boot\n")); |
387
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456 printf_P(PSTR("measure %hu comms %hu wake %hhu\n"), |
386 | 457 new_measure_wake, new_comms_wake, new_wake_secs); |
319 | 458 } |
386 | 459 } |
460 | |
461 static void | |
462 cmd_awake() | |
463 { | |
464 stay_awake = 1; | |
465 printf_P(PSTR("awake\n")); | |
319 | 466 } |
467 | |
318 | 468 static void |
306 | 469 read_handler() |
470 { | |
312 | 471 if (strcmp_P(readbuf, PSTR("fetch")) == 0) |
306 | 472 { |
473 cmd_fetch(); | |
474 } | |
312 | 475 else if (strcmp_P(readbuf, PSTR("clear")) == 0) |
306 | 476 { |
477 cmd_clear(); | |
478 } | |
312 | 479 else if (strcmp_P(readbuf, PSTR("btoff")) == 0) |
306 | 480 { |
481 cmd_btoff(); | |
482 } | |
318 | 483 else if (strcmp_P(readbuf, PSTR("measure")) == 0) |
484 { | |
485 cmd_measure(); | |
486 } | |
487 else if (strcmp_P(readbuf, PSTR("sensors")) == 0) | |
488 { | |
489 cmd_sensors(); | |
490 } | |
386 | 491 else if (strcmp_P(readbuf, PSTR("get_params")) == 0) |
492 { | |
493 cmd_get_params(); | |
494 } | |
389 | 495 else if (strncmp_P(readbuf, PSTR("set_params "), 11) == 0) |
386 | 496 { |
389 | 497 cmd_set_params(&readbuf[11]); |
386 | 498 } |
499 else if (strcmp_P(readbuf, PSTR("awake")) == 0) | |
500 { | |
501 cmd_awake(); | |
502 } | |
360
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503 else if (strcmp_P(readbuf, PSTR("reset")) == 0) |
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504 { |
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505 cmd_reset(); |
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506 } |
306 | 507 else |
508 { | |
389 | 509 printf_P(PSTR("Bad command '%s'\n"), readbuf); |
306 | 510 } |
511 } | |
512 | |
326
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513 ISR(INT0_vect) |
324 | 514 { |
347 | 515 need_comms = 1; |
386 | 516 comms_timeout = wake_secs; |
330
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517 blink(); |
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518 _delay_ms(100); |
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519 blink(); |
324 | 520 } |
521 | |
522 | |
308 | 523 ISR(USART_RX_vect) |
306 | 524 { |
308 | 525 char c = UDR0; |
339
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526 #ifdef HAVE_UART_ECHO |
318 | 527 uart_putchar(c, NULL); |
339
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528 #endif |
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529 if (c == '\r' || c == '\n') |
306 | 530 { |
328
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531 if (readpos > 0) |
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532 { |
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533 readbuf[readpos] = '\0'; |
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534 have_cmd = 1; |
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535 readpos = 0; |
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536 } |
306 | 537 } |
538 else | |
539 { | |
540 readbuf[readpos] = c; | |
541 readpos++; | |
542 if (readpos >= sizeof(readbuf)) | |
543 { | |
544 readpos = 0; | |
545 } | |
546 } | |
547 } | |
548 | |
308 | 549 ISR(TIMER2_COMPA_vect) |
307 | 550 { |
320 | 551 TCNT2 = 0; |
386 | 552 measure_count += TICK; |
553 comms_count += TICK; | |
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554 |
386 | 555 clock_epoch += TICK; |
323 | 556 |
322
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557 if (comms_timeout != 0) |
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558 { |
386 | 559 comms_timeout -= TICK; |
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560 } |
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561 |
386 | 562 if (measure_count >= measure_wake) |
307 | 563 { |
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564 measure_count = 0; |
307 | 565 need_measurement = 1; |
566 } | |
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567 |
386 | 568 if (comms_count >= comms_wake) |
347 | 569 { |
570 comms_count = 0; | |
571 need_comms = 1; | |
572 } | |
307 | 573 } |
574 | |
309 | 575 DWORD get_fattime (void) |
576 { | |
577 return 0; | |
578 } | |
579 | |
307 | 580 static void |
581 deep_sleep() | |
582 { | |
583 // p119 of manual | |
308 | 584 OCR2A = SLEEP_COMPARE; |
585 loop_until_bit_is_clear(ASSR, OCR2AUB); | |
307 | 586 |
587 set_sleep_mode(SLEEP_MODE_PWR_SAVE); | |
588 sleep_mode(); | |
589 } | |
590 | |
591 static void | |
310
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592 idle_sleep() |
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593 { |
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594 set_sleep_mode(SLEEP_MODE_IDLE); |
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595 sleep_mode(); |
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596 } |
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597 |
365 | 598 static uint16_t |
599 adc_vcc() | |
361
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600 { |
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601 PRR &= ~_BV(PRADC); |
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602 |
368 | 603 // /16 prescaler |
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604 ADCSRA = _BV(ADEN) | _BV(ADPS2); |
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605 |
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606 // set to measure 1.1 reference |
364 | 607 ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1); |
366 | 608 // average a number of samples |
609 uint16_t sum = 0; | |
610 uint8_t num = 0; | |
611 for (uint8_t n = 0; n < 20; n++) | |
365 | 612 { |
613 ADCSRA |= _BV(ADSC); | |
614 loop_until_bit_is_clear(ADCSRA, ADSC); | |
361
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615 |
366 | 616 uint8_t low_11 = ADCL; |
617 uint8_t high_11 = ADCH; | |
618 uint16_t val = low_11 + (high_11 << 8); | |
312 | 619 |
366 | 620 if (n >= 4) |
621 { | |
622 sum += val; | |
623 num++; | |
624 } | |
625 } | |
626 ADCSRA = 0; | |
627 PRR |= _BV(PRADC); | |
312 | 628 |
386 | 629 //float res_volts = 1.1 * 1024 * num / sum; |
630 //return 1000 * res_volts; | |
631 return ((uint32_t)1100*1024*num) / sum; | |
312 | 632 } |
633 | |
310
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634 static void |
307 | 635 do_measurement() |
636 { | |
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637 blink(); |
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638 |
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639 simple_ds18b20_start_meas(NULL); |
365 | 640 // sleep rather than using a long delay |
641 deep_sleep(); | |
642 //_delay_ms(DS18B20_TCONV_12BIT); | |
319 | 643 |
386 | 644 if (n_measurements == max_measurements) |
319 | 645 { |
646 n_measurements = 0; | |
647 } | |
312 | 648 |
386 | 649 for (uint8_t s = 0; s < n_sensors; s++) |
319 | 650 { |
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651 uint16_t reading; |
386 | 652 uint8_t ret = simple_ds18b20_read_raw(sensor_id[s], &reading); |
653 if (ret != DS18X20_OK) | |
319 | 654 { |
386 | 655 reading = VALUE_BROKEN; |
319 | 656 } |
386 | 657 set_measurement(s, n_measurements, reading); |
319 | 658 } |
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659 |
365 | 660 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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661 { |
365 | 662 if (n_measurements == 0) |
663 { | |
664 first_measurement_clock = clock_epoch; | |
665 } | |
666 last_measurement_clock = clock_epoch; | |
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667 } |
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668 |
320 | 669 n_measurements++; |
318 | 670 //do_adc_335(); |
307 | 671 } |
672 | |
310
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673 static void |
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674 do_comms() |
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675 { |
347 | 676 // turn on bluetooth |
365 | 677 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
678 { | |
679 last_comms_clock = clock_epoch; | |
680 } | |
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681 set_aux_power(1); |
313 | 682 uart_on(); |
347 | 683 |
684 // write sd card here? same 3.3v regulator... | |
685 | |
386 | 686 for (comms_timeout = wake_secs; |
687 comms_timeout > 0 || stay_awake; | |
688 ) | |
347 | 689 { |
312 | 690 if (need_measurement) |
691 { | |
320 | 692 need_measurement = 0; |
312 | 693 do_measurement(); |
349 | 694 continue; |
312 | 695 } |
696 | |
333
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697 if (have_cmd) |
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698 { |
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699 have_cmd = 0; |
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700 read_handler(); |
349 | 701 continue; |
333
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702 } |
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703 |
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704 // wait for commands from the master |
347 | 705 idle_sleep(); |
706 } | |
310
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707 |
312 | 708 uart_off(); |
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709 // in case bluetooth takes time to flush |
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710 _delay_ms(100); |
322
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711 set_aux_power(0); |
310
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712 } |
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713 |
313 | 714 static void |
715 blink() | |
716 { | |
717 PORT_LED &= ~_BV(PIN_LED); | |
315 | 718 _delay_ms(1); |
313 | 719 PORT_LED |= _BV(PIN_LED); |
720 } | |
721 | |
722 static void | |
723 long_delay(int ms) | |
724 { | |
725 int iter = ms / 100; | |
726 | |
727 for (int i = 0; i < iter; i++) | |
728 { | |
729 _delay_ms(100); | |
730 } | |
731 } | |
732 | |
314 | 733 ISR(BADISR_vect) |
734 { | |
320 | 735 //uart_on(); |
314 | 736 printf_P(PSTR("Bad interrupt\n")); |
737 } | |
738 | |
306 | 739 int main(void) |
740 { | |
322
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741 setup_chip(); |
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742 blink(); |
315 | 743 |
322
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744 set_aux_power(0); |
313 | 745 |
312 | 746 stdout = &mystdout; |
313 | 747 uart_on(); |
748 | |
322
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749 printf(PSTR("Started.\n")); |
319 | 750 |
386 | 751 load_params(); |
319 | 752 |
382
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753 init_sensors(); |
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754 |
314 | 755 uart_off(); |
306 | 756 |
312 | 757 // turn off everything except timer2 |
352
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758 PRR = _BV(PRTWI) | _BV(PRTIM0) | _BV(PRTIM1) | _BV(PRSPI) | _BV(PRUSART0) | _BV(PRADC); |
314 | 759 |
760 // for testing | |
761 uart_on(); | |
762 | |
322
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763 setup_tick_counter(); |
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764 |
318 | 765 sei(); |
314 | 766 |
331
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767 need_comms = 1; |
341
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768 need_measurement = 1; |
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769 |
322
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770 for(;;) |
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771 { |
307 | 772 if (need_measurement) |
773 { | |
320 | 774 need_measurement = 0; |
307 | 775 do_measurement(); |
347 | 776 continue; |
307 | 777 } |
310
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778 |
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779 if (need_comms) |
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780 { |
322
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781 need_comms = 0; |
310
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782 do_comms(); |
347 | 783 continue; |
310
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784 } |
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785 |
347 | 786 deep_sleep(); |
306 | 787 } |
318 | 788 |
306 | 789 return 0; /* never reached */ |
790 } |