Mercurial > templog
annotate main.c @ 319:9621436cfa07
Add eeprom stuff
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Sat, 19 May 2012 23:59:12 +0800 |
| parents | 31199b2941f6 |
| children | 426fb44ece3f |
| rev | line source |
|---|---|
| 306 | 1 /* Name: main.c |
| 2 * Author: <insert your name here> | |
| 3 * Copyright: <insert your copyright message here> | |
| 4 * License: <insert your license reference here> | |
| 5 */ | |
| 6 | |
| 7 #include <stdio.h> | |
| 8 #include <string.h> | |
| 319 | 9 #include <stddef.h> |
| 307 | 10 #include <avr/io.h> |
| 11 #include <avr/interrupt.h> | |
| 12 #include <avr/sleep.h> | |
| 313 | 13 #include <util/delay.h> |
| 312 | 14 #include <avr/pgmspace.h> |
| 319 | 15 #include <avr/eeprom.h> |
| 306 | 16 #include <util/crc16.h> |
| 17 | |
| 318 | 18 // for DWORD of get_fattime() |
| 309 | 19 #include "integer.h" |
| 318 | 20 |
| 21 #include "simple_ds18b20.h" | |
| 319 | 22 #include "onewire.h" |
| 309 | 23 |
| 306 | 24 // configuration params |
| 25 // - measurement interval | |
| 26 // - transmit interval | |
| 27 // - bluetooth params | |
| 28 // - number of sensors (and range?) | |
| 29 | |
| 307 | 30 // 1 second. we have 1024 prescaler, 32768 crystal. |
| 308 | 31 #define SLEEP_COMPARE 32 |
|
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32 #define MEASURE_WAKE 60 |
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33 |
| 319 | 34 #define VALUE_NOSENSOR -9000 |
| 35 #define VALUE_BROKEN -8000 | |
| 36 | |
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37 #define COMMS_WAKE 3600 |
| 308 | 38 |
| 316 | 39 #define BAUD 19200 |
| 313 | 40 #define UBRR ((F_CPU)/8/(BAUD)-1) |
| 41 | |
| 42 #define PORT_LED PORTC | |
| 43 #define DDR_LED DDRC | |
| 44 #define PIN_LED PC4 | |
| 307 | 45 |
| 319 | 46 #define NUM_MEASUREMENTS 100 |
| 47 #define MAX_SENSORS 5 | |
| 312 | 48 |
| 316 | 49 int uart_putchar(char c, FILE *stream); |
| 306 | 50 static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL, |
| 51 _FDEV_SETUP_WRITE); | |
| 52 | |
| 319 | 53 static uint16_t n_measurements = 0; |
| 54 // stored as decidegrees | |
| 55 static int16_t measurements[MAX_SENSORS][NUM_MEASUREMENTS]; | |
| 306 | 56 |
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57 // boolean flags |
| 313 | 58 static uint8_t need_measurement = 0; |
| 59 static uint8_t need_comms = 0; | |
| 60 static uint8_t comms_done = 0; | |
| 307 | 61 |
| 313 | 62 static uint8_t readpos = 0; |
| 306 | 63 static char readbuf[30]; |
| 64 | |
| 313 | 65 static uint8_t measure_count = 0; |
| 66 static uint16_t comms_count = 0; | |
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67 |
| 319 | 68 // thanks to http://projectgus.com/2010/07/eeprom-access-with-arduino/ |
| 69 #define eeprom_read_to(dst_p, eeprom_field, dst_size) eeprom_read_block((dst_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (dst_size)) | |
| 70 #define eeprom_read(dst, eeprom_field) eeprom_read_to((&dst), eeprom_field, sizeof(dst)) | |
| 71 #define eeprom_write_from(src_p, eeprom_field, src_size) eeprom_write_block((src_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (src_size)) | |
| 72 #define eeprom_write(src, eeprom_field) { eeprom_write_from(&src, eeprom_field, sizeof(src)); } | |
| 73 | |
| 74 #define EXPECT_MAGIC 0x67c9 | |
| 75 | |
| 76 struct __attribute__ ((__packed__)) __eeprom_data { | |
| 77 uint16_t magic; | |
| 78 uint8_t n_sensors; | |
| 79 uint8_t sensor_id[MAX_SENSORS][8]; | |
| 80 }; | |
| 81 | |
| 314 | 82 #define DEBUG(str) printf_P(PSTR(str)) |
| 83 | |
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84 static void deep_sleep(); |
| 307 | 85 |
| 306 | 86 static void |
| 313 | 87 uart_on() |
| 306 | 88 { |
| 314 | 89 // Power reduction register |
| 90 //PRR &= ~_BV(PRUSART0); | |
| 91 | |
| 306 | 92 // baud rate |
| 313 | 93 UBRR0H = (unsigned char)(UBRR >> 8); |
| 94 UBRR0L = (unsigned char)UBRR; | |
| 95 // set 2x clock, improves accuracy of UBRR | |
| 96 UCSR0A |= _BV(U2X0); | |
| 312 | 97 UCSR0B = _BV(RXCIE0) | _BV(RXEN0) | _BV(TXEN0); |
| 306 | 98 //8N1 |
| 313 | 99 UCSR0C = _BV(UCSZ01) | _BV(UCSZ00); |
| 312 | 100 } |
| 101 | |
| 102 static void | |
| 103 uart_off() | |
| 104 { | |
| 105 // Turn of interrupts and disable tx/rx | |
| 106 UCSR0B = 0; | |
| 107 | |
| 108 // Power reduction register | |
| 314 | 109 //PRR |= _BV(PRUSART0); |
| 306 | 110 } |
| 111 | |
| 316 | 112 int |
| 306 | 113 uart_putchar(char c, FILE *stream) |
| 114 { | |
| 316 | 115 // XXX should sleep in the loop for power. |
| 314 | 116 if (c == '\n') |
| 117 { | |
| 316 | 118 loop_until_bit_is_set(UCSR0A, UDRE0); |
| 119 UDR0 = '\r';; | |
| 314 | 120 } |
| 308 | 121 loop_until_bit_is_set(UCSR0A, UDRE0); |
| 122 UDR0 = c; | |
| 316 | 123 if (c == '\r') |
| 124 { | |
| 125 loop_until_bit_is_set(UCSR0A, UDRE0); | |
| 126 UDR0 = '\n';; | |
| 127 } | |
| 306 | 128 return 0; |
| 129 } | |
| 130 | |
| 131 static void | |
| 132 cmd_fetch() | |
| 133 { | |
| 134 uint16_t crc = 0; | |
| 319 | 135 uint16_t sens; |
| 136 eeprom_read(sens, n_sensors); | |
| 137 | |
| 312 | 138 printf_P(PSTR("%d measurements\n"), n_measurements); |
| 319 | 139 for (uint16_t i = 0; i < n_measurements; i++) |
| 306 | 140 { |
| 319 | 141 printf_P(PSTR("%3d :"), i); |
| 142 for (uint8_t s = 0; s < sens; s++) | |
| 143 { | |
| 144 printf_P(PSTR(" %6d"), measurements[s][i]); | |
| 145 crc = _crc_ccitt_update(crc, measurements[s][i]); | |
| 146 } | |
| 147 putchar('\n'); | |
| 306 | 148 } |
| 312 | 149 printf_P(PSTR("CRC : %d\n"), crc); |
| 306 | 150 } |
| 151 | |
| 152 static void | |
| 153 cmd_clear() | |
| 154 { | |
| 313 | 155 n_measurements = 0; |
| 156 printf_P(PSTR("Cleared\n")); | |
| 306 | 157 } |
| 158 | |
| 159 static void | |
| 160 cmd_btoff() | |
| 161 { | |
| 313 | 162 printf_P(PSTR("Turning off\n")); |
| 163 _delay_ms(50); | |
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164 comms_done = 1; |
| 306 | 165 } |
| 166 | |
| 167 static void | |
| 318 | 168 cmd_measure() |
| 169 { | |
| 170 printf_P(PSTR("Measuring\n")); | |
| 171 need_measurement = 1; | |
| 172 } | |
| 173 | |
| 174 static void | |
| 175 cmd_sensors() | |
| 176 { | |
| 177 uint8_t ret = simple_ds18b20_start_meas(NULL); | |
| 319 | 178 printf_P(("All sensors, ret %d, waiting...\n"), ret); |
| 318 | 179 _delay_ms(DS18B20_TCONV_12BIT); |
| 180 simple_ds18b20_read_all(); | |
| 181 } | |
| 182 | |
| 319 | 183 // 0 on success |
| 184 static uint8_t | |
| 185 get_hex_string(const char *hex, uint8_t *out, uint8_t size) | |
| 186 { | |
| 187 uint8_t upper; | |
| 188 uint8_t o; | |
| 189 for (uint8_t i = 0, z = 0; o < size; i++) | |
| 190 { | |
| 191 uint8_t h = hex[i]; | |
| 192 if (h >= 'A' && h <= 'F') | |
| 193 { | |
| 194 // lower case | |
| 195 h += 0x20; | |
| 196 } | |
| 197 uint8_t nibble; | |
| 198 if (h >= '0' && h <= '9') | |
| 199 { | |
| 200 nibble = h - '0'; | |
| 201 } | |
| 202 else if (h >= 'a' && h <= 'f') | |
| 203 { | |
| 204 nibble = 10 + h - 'a'; | |
| 205 } | |
| 206 else if (h == ' ' || h == ':') | |
| 207 { | |
| 208 continue; | |
| 209 } | |
| 210 else | |
| 211 { | |
| 212 printf_P(PSTR("Bad hex 0x%x '%c'\n"), hex[i], hex[i]); | |
| 213 return 1; | |
| 214 } | |
| 215 | |
| 216 if (z % 2 == 0) | |
| 217 { | |
| 218 upper = nibble << 4; | |
| 219 } | |
| 220 else | |
| 221 { | |
| 222 out[o] = upper | nibble; | |
| 223 o++; | |
| 224 } | |
| 225 | |
| 226 z++; | |
| 227 } | |
| 228 | |
| 229 if (o != size) | |
| 230 { | |
| 231 printf_P(PSTR("Short hex\n")); | |
| 232 return 1; | |
| 233 } | |
| 234 return 0; | |
| 235 } | |
| 236 | |
| 237 static void | |
| 238 add_sensor(uint8_t *id) | |
| 239 { | |
| 240 uint8_t n; | |
| 241 eeprom_read(n, n_sensors); | |
| 242 if (n < MAX_SENSORS) | |
| 243 { | |
| 244 cli(); | |
| 245 eeprom_write_from(id, sensor_id[n], 8); | |
| 246 n++; | |
| 247 eeprom_write(n, n_sensors); | |
| 248 sei(); | |
| 249 printf_P(PSTR("Added sensor %d : "), n); | |
| 250 printhex(id, 8); | |
| 251 putchar('\n'); | |
| 252 } | |
| 253 else | |
| 254 { | |
| 255 printf_P(PSTR("Too many sensors\n")); | |
| 256 } | |
| 257 } | |
| 258 | |
| 259 static void | |
| 260 cmd_add_all() | |
| 261 { | |
| 262 uint8_t id[OW_ROMCODE_SIZE]; | |
| 263 uint8_t sp[DS18X20_SP_SIZE]; | |
| 264 printf_P("Adding all\n"); | |
| 265 ow_reset(); | |
| 266 for( uint8_t diff = OW_SEARCH_FIRST; diff != OW_LAST_DEVICE; ) | |
| 267 { | |
| 268 diff = ow_rom_search( diff, &id[0] ); | |
| 269 if( diff == OW_PRESENCE_ERR ) { | |
| 270 printf_P( PSTR("No Sensor found\r") ); | |
| 271 return; | |
| 272 } | |
| 273 | |
| 274 if( diff == OW_DATA_ERR ) { | |
| 275 printf_P( PSTR("Bus Error\r") ); | |
| 276 return; | |
| 277 } | |
| 278 add_sensor(id); | |
| 279 } | |
| 280 } | |
| 281 | |
| 282 static void | |
| 283 cmd_add_sensor(const char* hex_addr) | |
| 284 { | |
| 285 uint8_t id[8]; | |
| 286 uint8_t ret = get_hex_string(hex_addr, id, 8); | |
| 287 if (ret) | |
| 288 { | |
| 289 return; | |
| 290 } | |
| 291 add_sensor(id); | |
| 292 | |
| 293 } | |
| 294 | |
| 295 static void | |
| 296 cmd_init() | |
| 297 { | |
| 298 printf_P(PSTR("Resetting sensor list\n")); | |
| 299 uint8_t zero = 0; | |
| 300 cli(); | |
| 301 eeprom_write(zero, n_sensors); | |
| 302 sei(); | |
| 303 printf_P(PSTR("Done.\n")); | |
| 304 } | |
| 305 | |
| 306 static void | |
| 307 check_first_startup() | |
| 308 { | |
| 309 uint16_t magic; | |
| 310 eeprom_read(magic, magic); | |
| 311 if (magic != EXPECT_MAGIC) | |
| 312 { | |
| 313 printf_P(PSTR("First boot, looking for sensors...\n")); | |
| 314 cmd_init(); | |
| 315 cmd_add_all(); | |
| 316 } | |
| 317 } | |
| 318 | |
| 318 | 319 static void |
| 306 | 320 read_handler() |
| 321 { | |
| 312 | 322 if (strcmp_P(readbuf, PSTR("fetch")) == 0) |
| 306 | 323 { |
| 324 cmd_fetch(); | |
| 325 } | |
| 312 | 326 else if (strcmp_P(readbuf, PSTR("clear")) == 0) |
| 306 | 327 { |
| 328 cmd_clear(); | |
| 329 } | |
| 312 | 330 else if (strcmp_P(readbuf, PSTR("btoff")) == 0) |
| 306 | 331 { |
| 332 cmd_btoff(); | |
| 333 } | |
| 318 | 334 else if (strcmp_P(readbuf, PSTR("measure")) == 0) |
| 335 { | |
| 336 cmd_measure(); | |
| 337 } | |
| 338 else if (strcmp_P(readbuf, PSTR("sensors")) == 0) | |
| 339 { | |
| 340 cmd_sensors(); | |
| 341 } | |
| 319 | 342 else if (strncmp_P(readbuf, PSTR("adds "), strlen("adds ")) == 0) |
| 343 { | |
| 344 cmd_add_sensor(readbuf + strlen("adds ")); | |
| 345 } | |
| 346 else if (strcmp_P(readbuf, PSTR("addall"))== 0) | |
| 347 { | |
| 348 cmd_add_all(); | |
| 349 } | |
| 350 else if (strcmp_P(readbuf, PSTR("init")) == 0) | |
| 351 { | |
| 352 cmd_init(); | |
| 353 } | |
| 306 | 354 else |
| 355 { | |
| 312 | 356 printf_P(PSTR("Bad command\n")); |
| 306 | 357 } |
| 358 } | |
| 359 | |
| 308 | 360 ISR(USART_RX_vect) |
| 306 | 361 { |
| 308 | 362 char c = UDR0; |
| 318 | 363 uart_putchar(c, NULL); |
| 364 if (c == '\r') | |
| 306 | 365 { |
| 366 readbuf[readpos] = '\0'; | |
| 367 read_handler(); | |
| 368 readpos = 0; | |
| 369 } | |
| 370 else | |
| 371 { | |
| 372 readbuf[readpos] = c; | |
| 373 readpos++; | |
| 374 if (readpos >= sizeof(readbuf)) | |
| 375 { | |
| 376 readpos = 0; | |
| 377 } | |
| 378 } | |
| 379 } | |
| 380 | |
| 308 | 381 ISR(TIMER2_COMPA_vect) |
| 307 | 382 { |
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383 measure_count ++; |
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384 comms_count ++; |
| 318 | 385 printf("measure_count %d\n", measure_count); |
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386 if (measure_count == MEASURE_WAKE) |
| 307 | 387 { |
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388 measure_count = 0; |
| 318 | 389 printf("need_measurement = 1\n"); |
| 307 | 390 need_measurement = 1; |
| 391 } | |
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392 |
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393 if (comms_count == COMMS_WAKE) |
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394 { |
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395 comms_count = 0; |
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396 need_comms = 1; |
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397 } |
| 307 | 398 } |
| 399 | |
| 309 | 400 DWORD get_fattime (void) |
| 401 { | |
| 402 return 0; | |
| 403 } | |
| 404 | |
| 307 | 405 static void |
| 406 deep_sleep() | |
| 407 { | |
| 408 // p119 of manual | |
| 308 | 409 OCR2A = SLEEP_COMPARE; |
| 410 loop_until_bit_is_clear(ASSR, OCR2AUB); | |
| 307 | 411 |
| 412 set_sleep_mode(SLEEP_MODE_PWR_SAVE); | |
| 413 sleep_mode(); | |
| 414 } | |
| 415 | |
| 416 static void | |
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417 idle_sleep() |
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418 { |
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419 set_sleep_mode(SLEEP_MODE_IDLE); |
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420 sleep_mode(); |
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421 } |
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422 |
| 312 | 423 static void |
| 424 do_adc_335() | |
| 425 { | |
| 314 | 426 //PRR &= ~_BV(PRADC); |
| 312 | 427 |
| 428 ADMUX = _BV(ADLAR); | |
| 429 | |
| 430 // ADPS2 = /16 prescaler, 62khz at 1mhz clock | |
| 431 ADCSRA = _BV(ADEN) | _BV(ADPS2); | |
| 432 | |
| 433 // measure value | |
| 434 ADCSRA |= _BV(ADSC); | |
| 435 loop_until_bit_is_clear(ADCSRA, ADSC); | |
| 436 uint8_t low = ADCL; | |
| 437 uint8_t high = ADCH; | |
| 438 uint16_t f_measure = low + (high << 8); | |
| 439 | |
| 440 // set to measure 1.1 reference | |
| 441 ADMUX = _BV(ADLAR) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1); | |
| 442 ADCSRA |= _BV(ADSC); | |
| 443 loop_until_bit_is_clear(ADCSRA, ADSC); | |
| 444 uint8_t low_11 = ADCL; | |
| 445 uint8_t high_11 = ADCH; | |
| 446 uint16_t f_11 = low_11 + (high_11 << 8); | |
| 447 | |
| 448 float res_volts = 1.1 * f_measure / f_11; | |
| 449 | |
| 450 // 10mV/degree | |
| 451 // scale to 1/5 degree units above 0C | |
| 452 int temp = (res_volts - 2.73) * 500; | |
| 319 | 453 // XXX fixme |
| 454 //measurements[n_measurements] = temp; | |
| 312 | 455 // XXX something if it hits the limit |
| 456 | |
| 457 // measure AVR internal temperature against 1.1 ref. | |
| 458 ADMUX = _BV(ADLAR) | _BV(MUX3) | _BV(REFS1) | _BV(REFS0); | |
| 459 ADCSRA |= _BV(ADSC); | |
| 460 loop_until_bit_is_clear(ADCSRA, ADSC); | |
| 461 uint16_t res_internal = ADCL; | |
| 462 res_internal |= ADCH << 8; | |
| 463 | |
| 464 float internal_volts = res_internal * (1.1 / 1024.0); | |
| 465 | |
| 466 // 1mV/degree | |
| 467 int internal_temp = (internal_volts - 2.73) * 5000; | |
| 319 | 468 // XXX fixme |
| 469 //internal_measurements[n_measurements] = internal_temp; | |
| 312 | 470 |
| 471 printf_P("measure %d: external %d, internal %d, 1.1 %d\n", | |
| 472 n_measurements, temp, internal_temp, f_11); | |
| 473 | |
| 474 n_measurements++; | |
| 314 | 475 //PRR |= _BV(PRADC); |
| 312 | 476 } |
| 477 | |
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478 static void |
| 307 | 479 do_measurement() |
| 480 { | |
| 319 | 481 uint8_t n_sensors; |
| 482 eeprom_read(n_sensors, n_sensors); | |
| 483 | |
| 484 uint8_t ret = simple_ds18b20_start_meas(NULL); | |
| 485 printf_P(("Read all sensors, ret %d, waiting...\n"), ret); | |
| 486 _delay_ms(DS18B20_TCONV_12BIT); | |
| 487 | |
| 488 if (n_measurements == NUM_MEASUREMENTS) | |
| 489 { | |
| 490 printf_P(PSTR("Measurements overflow\n")); | |
| 491 n_measurements = 0; | |
| 492 } | |
| 312 | 493 |
| 319 | 494 for (uint8_t n = 0; n < MAX_SENSORS; n++) |
| 495 { | |
| 496 int16_t decicelsius; | |
| 497 if (n >= n_sensors) | |
| 498 { | |
| 499 decicelsius = VALUE_NOSENSOR; | |
| 500 } | |
| 501 else | |
| 502 { | |
| 503 uint8_t id[8]; | |
| 504 eeprom_read_to(id, sensor_id[n], 8); | |
| 505 | |
| 506 uint8_t ret = simple_ds18b20_read_decicelsius(id, &decicelsius); | |
| 507 if (ret != DS18X20_OK) | |
| 508 { | |
| 509 decicelsius = VALUE_BROKEN; | |
| 510 } | |
| 511 } | |
| 512 measurements[n_measurements][n] = decicelsius; | |
| 513 } | |
| 318 | 514 //do_adc_335(); |
| 307 | 515 } |
| 516 | |
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517 static void |
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518 do_comms() |
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519 { |
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520 need_comms = 0; |
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521 |
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522 // turn on bluetooth |
| 313 | 523 uart_on(); |
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310
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524 |
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525 // write sd card here? same 3.3v regulator... |
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526 |
| 318 | 527 printf("ready> \n"); |
| 528 | |
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310
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529 comms_done = 0; |
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530 for (;;) |
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531 { |
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532 if (comms_done) |
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533 { |
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534 break; |
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535 } |
| 312 | 536 |
| 537 if (need_measurement) | |
| 538 { | |
| 539 do_measurement(); | |
| 540 } | |
| 541 | |
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310
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542 idle_sleep(); |
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543 } |
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544 |
| 312 | 545 uart_off(); |
| 546 | |
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310
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547 // turn off bluetooth |
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548 } |
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549 |
| 313 | 550 static void |
| 551 blink() | |
| 552 { | |
| 553 PORT_LED &= ~_BV(PIN_LED); | |
| 315 | 554 _delay_ms(1); |
| 313 | 555 PORT_LED |= _BV(PIN_LED); |
| 556 } | |
| 557 | |
| 319 | 558 #if 0 |
| 313 | 559 static void |
| 560 long_delay(int ms) | |
| 561 { | |
| 562 int iter = ms / 100; | |
| 563 | |
| 564 for (int i = 0; i < iter; i++) | |
| 565 { | |
| 566 _delay_ms(100); | |
| 567 } | |
| 568 } | |
| 319 | 569 #endif |
| 313 | 570 |
| 314 | 571 ISR(BADISR_vect) |
| 572 { | |
| 573 uart_on(); | |
| 574 printf_P(PSTR("Bad interrupt\n")); | |
| 575 } | |
| 576 | |
| 315 | 577 static void |
| 578 set_2mhz() | |
| 579 { | |
| 580 cli(); | |
| 581 CLKPR = _BV(CLKPCE); | |
| 582 // divide by 4 | |
| 583 CLKPR = _BV(CLKPS1); | |
| 584 sei(); | |
| 585 } | |
| 586 | |
| 306 | 587 int main(void) |
| 588 { | |
| 315 | 589 set_2mhz(); |
| 590 | |
| 313 | 591 DDR_LED |= _BV(PIN_LED); |
| 314 | 592 blink(); |
| 313 | 593 |
| 312 | 594 stdout = &mystdout; |
| 313 | 595 uart_on(); |
| 596 | |
| 312 | 597 fprintf_P(&mystdout, PSTR("hello %d\n"), 12); |
| 319 | 598 |
| 599 check_first_startup(); | |
| 600 | |
| 314 | 601 uart_off(); |
| 306 | 602 |
| 312 | 603 // turn off everything except timer2 |
| 314 | 604 //PRR = _BV(PRTWI) | _BV(PRTIM0) | _BV(PRTIM1) | _BV(PRSPI) | _BV(PRUSART0) | _BV(PRADC); |
| 605 | |
| 606 // for testing | |
| 607 uart_on(); | |
| 608 | |
| 318 | 609 sei(); |
| 314 | 610 |
| 307 | 611 // set up counter2. |
| 612 // COM21 COM20 Set OC2 on Compare Match (p116) | |
| 613 // WGM21 Clear counter on compare | |
| 319 | 614 TCCR2A = _BV(COM2A1) | _BV(COM2A0);// | _BV(WGM21); |
| 307 | 615 // CS22 CS21 CS20 clk/1024 |
| 308 | 616 TCCR2B = _BV(CS22) | _BV(CS21) | _BV(CS20); |
| 307 | 617 // set async mode |
| 618 ASSR |= _BV(AS2); | |
| 314 | 619 // interrupt |
| 620 TIMSK2 = _BV(OCIE2A); | |
| 306 | 621 |
| 312 | 622 for (;;) |
| 623 { | |
| 318 | 624 do_comms(); |
| 312 | 625 } |
| 318 | 626 |
| 306 | 627 for(;;){ |
| 628 /* insert your main loop code here */ | |
| 307 | 629 if (need_measurement) |
| 630 { | |
| 631 do_measurement(); | |
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310
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632 continue; |
| 307 | 633 } |
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634 |
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635 if (need_comms) |
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636 { |
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637 do_comms(); |
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638 continue; |
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639 } |
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640 |
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641 deep_sleep(); |
| 315 | 642 blink(); |
| 316 | 643 printf("."); |
| 306 | 644 } |
| 318 | 645 |
| 306 | 646 return 0; /* never reached */ |
| 647 } |