Mercurial > templog
annotate main.c @ 15:54b0fda9cba7
Add shutdown handling, print sensors in "fetch" output
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Sun, 20 May 2012 22:16:56 +0800 |
| parents | 426fb44ece3f |
| children | 5075d8c428bd bf733e8e8cf0 |
| rev | line source |
|---|---|
| 0 | 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> | |
| 13 | 9 #include <stddef.h> |
| 1 | 10 #include <avr/io.h> |
| 11 #include <avr/interrupt.h> | |
| 12 #include <avr/sleep.h> | |
| 7 | 13 #include <util/delay.h> |
| 6 | 14 #include <avr/pgmspace.h> |
| 13 | 15 #include <avr/eeprom.h> |
| 0 | 16 #include <util/crc16.h> |
| 17 | |
| 12 | 18 // for DWORD of get_fattime() |
| 3 | 19 #include "integer.h" |
| 12 | 20 |
| 21 #include "simple_ds18b20.h" | |
| 13 | 22 #include "onewire.h" |
| 3 | 23 |
| 0 | 24 // configuration params |
| 25 // - measurement interval | |
| 26 // - transmit interval | |
| 27 // - bluetooth params | |
| 28 // - number of sensors (and range?) | |
| 29 | |
| 1 | 30 // 1 second. we have 1024 prescaler, 32768 crystal. |
| 2 | 31 #define SLEEP_COMPARE 32 |
| 14 | 32 #define MEASURE_WAKE 10 |
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33 |
| 13 | 34 #define VALUE_NOSENSOR -9000 |
| 35 #define VALUE_BROKEN -8000 | |
| 36 | |
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37 #define COMMS_WAKE 3600 |
| 2 | 38 |
| 10 | 39 #define BAUD 19200 |
| 7 | 40 #define UBRR ((F_CPU)/8/(BAUD)-1) |
| 41 | |
| 42 #define PORT_LED PORTC | |
| 43 #define DDR_LED DDRC | |
| 44 #define PIN_LED PC4 | |
| 1 | 45 |
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46 #define PORT_SHDN PORTD |
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47 #define DDR_SHDN DDRD |
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48 #define PIN_SHDN PD7 |
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49 |
| 13 | 50 #define NUM_MEASUREMENTS 100 |
| 51 #define MAX_SENSORS 5 | |
| 6 | 52 |
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53 // fixed at 8, have a shorter name |
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54 #define ID_LEN OW_ROMCODE_SIZE |
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55 |
| 10 | 56 int uart_putchar(char c, FILE *stream); |
| 14 | 57 static void long_delay(int ms); |
| 58 | |
| 0 | 59 static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL, |
| 60 _FDEV_SETUP_WRITE); | |
| 61 | |
| 13 | 62 static uint16_t n_measurements = 0; |
| 63 // stored as decidegrees | |
| 14 | 64 static int16_t measurements[NUM_MEASUREMENTS][MAX_SENSORS]; |
| 0 | 65 |
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66 // boolean flags |
| 7 | 67 static uint8_t need_measurement = 0; |
| 68 static uint8_t need_comms = 0; | |
| 69 static uint8_t comms_done = 0; | |
| 1 | 70 |
| 7 | 71 static uint8_t readpos = 0; |
| 0 | 72 static char readbuf[30]; |
| 73 | |
| 7 | 74 static uint8_t measure_count = 0; |
| 75 static uint16_t comms_count = 0; | |
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76 |
| 13 | 77 // thanks to http://projectgus.com/2010/07/eeprom-access-with-arduino/ |
| 78 #define eeprom_read_to(dst_p, eeprom_field, dst_size) eeprom_read_block((dst_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (dst_size)) | |
| 79 #define eeprom_read(dst, eeprom_field) eeprom_read_to((&dst), eeprom_field, sizeof(dst)) | |
| 80 #define eeprom_write_from(src_p, eeprom_field, src_size) eeprom_write_block((src_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (src_size)) | |
| 81 #define eeprom_write(src, eeprom_field) { eeprom_write_from(&src, eeprom_field, sizeof(src)); } | |
| 82 | |
| 83 #define EXPECT_MAGIC 0x67c9 | |
| 84 | |
| 85 struct __attribute__ ((__packed__)) __eeprom_data { | |
| 86 uint16_t magic; | |
| 87 uint8_t n_sensors; | |
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88 uint8_t sensor_id[MAX_SENSORS][ID_LEN]; |
| 13 | 89 }; |
| 90 | |
| 8 | 91 #define DEBUG(str) printf_P(PSTR(str)) |
| 92 | |
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93 static void deep_sleep(); |
| 1 | 94 |
| 0 | 95 static void |
| 7 | 96 uart_on() |
| 0 | 97 { |
| 8 | 98 // Power reduction register |
| 99 //PRR &= ~_BV(PRUSART0); | |
| 100 | |
| 0 | 101 // baud rate |
| 7 | 102 UBRR0H = (unsigned char)(UBRR >> 8); |
| 103 UBRR0L = (unsigned char)UBRR; | |
| 104 // set 2x clock, improves accuracy of UBRR | |
| 105 UCSR0A |= _BV(U2X0); | |
| 6 | 106 UCSR0B = _BV(RXCIE0) | _BV(RXEN0) | _BV(TXEN0); |
| 0 | 107 //8N1 |
| 7 | 108 UCSR0C = _BV(UCSZ01) | _BV(UCSZ00); |
| 6 | 109 } |
| 110 | |
| 111 static void | |
| 112 uart_off() | |
| 113 { | |
| 114 // Turn of interrupts and disable tx/rx | |
| 115 UCSR0B = 0; | |
| 116 | |
| 117 // Power reduction register | |
| 8 | 118 //PRR |= _BV(PRUSART0); |
| 0 | 119 } |
| 120 | |
| 10 | 121 int |
| 0 | 122 uart_putchar(char c, FILE *stream) |
| 123 { | |
| 10 | 124 // XXX should sleep in the loop for power. |
| 8 | 125 if (c == '\n') |
| 126 { | |
| 10 | 127 loop_until_bit_is_set(UCSR0A, UDRE0); |
| 128 UDR0 = '\r';; | |
| 8 | 129 } |
| 2 | 130 loop_until_bit_is_set(UCSR0A, UDRE0); |
| 131 UDR0 = c; | |
| 10 | 132 if (c == '\r') |
| 133 { | |
| 134 loop_until_bit_is_set(UCSR0A, UDRE0); | |
| 135 UDR0 = '\n';; | |
| 136 } | |
| 0 | 137 return 0; |
| 138 } | |
| 139 | |
| 140 static void | |
| 141 cmd_fetch() | |
| 142 { | |
| 143 uint16_t crc = 0; | |
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144 uint8_t n_sensors; |
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145 eeprom_read(n_sensors, n_sensors); |
| 13 | 146 |
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147 printf_P(PSTR("%d sensors\n"), n_measurements); |
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148 for (uint8_t s = 0; s < n_sensors; s++) |
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149 { |
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150 uint8_t id[ID_LEN]; |
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151 printf_P(PSTR("%d : "), s); |
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152 eeprom_read_to(id, sensor_id[s], ID_LEN); |
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153 printhex(id, ID_LEN); |
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154 putchar('\n'); |
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155 for (uint8_t i = 0; i < ID_LEN; i++) |
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156 { |
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157 crc = _crc_ccitt_update(crc, id[i]); |
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158 } |
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159 } |
| 6 | 160 printf_P(PSTR("%d measurements\n"), n_measurements); |
| 14 | 161 for (uint16_t n = 0; n < n_measurements; n++) |
| 0 | 162 { |
| 14 | 163 printf_P(PSTR("%3d :"), n); |
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164 for (uint8_t s = 0; s < n_sensors; s++) |
| 13 | 165 { |
| 14 | 166 printf_P(PSTR(" %6d"), measurements[n][s]); |
| 167 crc = _crc_ccitt_update(crc, measurements[n][s]); | |
| 13 | 168 } |
| 169 putchar('\n'); | |
| 0 | 170 } |
| 6 | 171 printf_P(PSTR("CRC : %d\n"), crc); |
| 0 | 172 } |
| 173 | |
| 174 static void | |
| 175 cmd_clear() | |
| 176 { | |
| 7 | 177 n_measurements = 0; |
| 178 printf_P(PSTR("Cleared\n")); | |
| 0 | 179 } |
| 180 | |
| 181 static void | |
| 182 cmd_btoff() | |
| 183 { | |
| 7 | 184 printf_P(PSTR("Turning off\n")); |
| 185 _delay_ms(50); | |
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186 PORTD |= _BV(PIN_SHDN); |
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187 comms_done = 1; |
| 0 | 188 } |
| 189 | |
| 190 static void | |
| 12 | 191 cmd_measure() |
| 192 { | |
| 193 printf_P(PSTR("Measuring\n")); | |
| 194 need_measurement = 1; | |
| 195 } | |
| 196 | |
| 197 static void | |
| 198 cmd_sensors() | |
| 199 { | |
| 200 uint8_t ret = simple_ds18b20_start_meas(NULL); | |
| 14 | 201 printf_P(PSTR("All sensors, ret %d, waiting...\n"), ret); |
| 202 long_delay(DS18B20_TCONV_12BIT); | |
| 12 | 203 simple_ds18b20_read_all(); |
| 204 } | |
| 205 | |
| 13 | 206 // 0 on success |
| 207 static uint8_t | |
| 208 get_hex_string(const char *hex, uint8_t *out, uint8_t size) | |
| 209 { | |
| 210 uint8_t upper; | |
| 211 uint8_t o; | |
| 212 for (uint8_t i = 0, z = 0; o < size; i++) | |
| 213 { | |
| 214 uint8_t h = hex[i]; | |
| 215 if (h >= 'A' && h <= 'F') | |
| 216 { | |
| 217 // lower case | |
| 218 h += 0x20; | |
| 219 } | |
| 220 uint8_t nibble; | |
| 221 if (h >= '0' && h <= '9') | |
| 222 { | |
| 223 nibble = h - '0'; | |
| 224 } | |
| 225 else if (h >= 'a' && h <= 'f') | |
| 226 { | |
| 227 nibble = 10 + h - 'a'; | |
| 228 } | |
| 229 else if (h == ' ' || h == ':') | |
| 230 { | |
| 231 continue; | |
| 232 } | |
| 233 else | |
| 234 { | |
| 235 printf_P(PSTR("Bad hex 0x%x '%c'\n"), hex[i], hex[i]); | |
| 236 return 1; | |
| 237 } | |
| 238 | |
| 239 if (z % 2 == 0) | |
| 240 { | |
| 241 upper = nibble << 4; | |
| 242 } | |
| 243 else | |
| 244 { | |
| 245 out[o] = upper | nibble; | |
| 246 o++; | |
| 247 } | |
| 248 | |
| 249 z++; | |
| 250 } | |
| 251 | |
| 252 if (o != size) | |
| 253 { | |
| 254 printf_P(PSTR("Short hex\n")); | |
| 255 return 1; | |
| 256 } | |
| 257 return 0; | |
| 258 } | |
| 259 | |
| 260 static void | |
| 261 add_sensor(uint8_t *id) | |
| 262 { | |
| 263 uint8_t n; | |
| 264 eeprom_read(n, n_sensors); | |
| 265 if (n < MAX_SENSORS) | |
| 266 { | |
| 267 cli(); | |
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268 eeprom_write_from(id, sensor_id[n], ID_LEN); |
| 13 | 269 n++; |
| 270 eeprom_write(n, n_sensors); | |
| 271 sei(); | |
| 272 printf_P(PSTR("Added sensor %d : "), n); | |
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273 printhex(id, ID_LEN); |
| 13 | 274 putchar('\n'); |
| 275 } | |
| 276 else | |
| 277 { | |
| 278 printf_P(PSTR("Too many sensors\n")); | |
| 279 } | |
| 280 } | |
| 281 | |
| 282 static void | |
| 283 cmd_add_all() | |
| 284 { | |
| 285 uint8_t id[OW_ROMCODE_SIZE]; | |
| 286 printf_P("Adding all\n"); | |
| 287 ow_reset(); | |
| 288 for( uint8_t diff = OW_SEARCH_FIRST; diff != OW_LAST_DEVICE; ) | |
| 289 { | |
| 290 diff = ow_rom_search( diff, &id[0] ); | |
| 291 if( diff == OW_PRESENCE_ERR ) { | |
| 292 printf_P( PSTR("No Sensor found\r") ); | |
| 293 return; | |
| 294 } | |
| 295 | |
| 296 if( diff == OW_DATA_ERR ) { | |
| 297 printf_P( PSTR("Bus Error\r") ); | |
| 298 return; | |
| 299 } | |
| 300 add_sensor(id); | |
| 301 } | |
| 302 } | |
| 303 | |
| 304 static void | |
| 305 cmd_add_sensor(const char* hex_addr) | |
| 306 { | |
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307 uint8_t id[ID_LEN]; |
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308 uint8_t ret = get_hex_string(hex_addr, id, ID_LEN); |
| 13 | 309 if (ret) |
| 310 { | |
| 311 return; | |
| 312 } | |
| 313 add_sensor(id); | |
| 314 | |
| 315 } | |
| 316 | |
| 317 static void | |
| 318 cmd_init() | |
| 319 { | |
| 320 printf_P(PSTR("Resetting sensor list\n")); | |
| 321 uint8_t zero = 0; | |
| 322 cli(); | |
| 323 eeprom_write(zero, n_sensors); | |
| 324 sei(); | |
| 325 printf_P(PSTR("Done.\n")); | |
| 326 } | |
| 327 | |
| 328 static void | |
| 329 check_first_startup() | |
| 330 { | |
| 331 uint16_t magic; | |
| 332 eeprom_read(magic, magic); | |
| 333 if (magic != EXPECT_MAGIC) | |
| 334 { | |
| 335 printf_P(PSTR("First boot, looking for sensors...\n")); | |
| 336 cmd_init(); | |
| 337 cmd_add_all(); | |
| 14 | 338 cli(); |
| 339 magic = EXPECT_MAGIC; | |
| 340 eeprom_write(magic, magic); | |
| 341 sei(); | |
| 13 | 342 } |
| 343 } | |
| 344 | |
| 12 | 345 static void |
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346 cmd_toggle() |
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347 { |
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348 PORT_SHDN ^= _BV(PIN_SHDN); |
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349 printf_P(PSTR("toggling power 3.3v %d\n"), PORT_SHDN & _BV(PIN_SHDN)); |
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350 } |
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351 |
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352 static void |
| 0 | 353 read_handler() |
| 354 { | |
| 6 | 355 if (strcmp_P(readbuf, PSTR("fetch")) == 0) |
| 0 | 356 { |
| 357 cmd_fetch(); | |
| 358 } | |
| 6 | 359 else if (strcmp_P(readbuf, PSTR("clear")) == 0) |
| 0 | 360 { |
| 361 cmd_clear(); | |
| 362 } | |
| 6 | 363 else if (strcmp_P(readbuf, PSTR("btoff")) == 0) |
| 0 | 364 { |
| 365 cmd_btoff(); | |
| 366 } | |
| 12 | 367 else if (strcmp_P(readbuf, PSTR("measure")) == 0) |
| 368 { | |
| 369 cmd_measure(); | |
| 370 } | |
| 371 else if (strcmp_P(readbuf, PSTR("sensors")) == 0) | |
| 372 { | |
| 373 cmd_sensors(); | |
| 374 } | |
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375 else if (strcmp_P(readbuf, PSTR("toggle")) == 0) |
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376 { |
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377 cmd_toggle(); |
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378 } |
| 13 | 379 else if (strncmp_P(readbuf, PSTR("adds "), strlen("adds ")) == 0) |
| 380 { | |
| 381 cmd_add_sensor(readbuf + strlen("adds ")); | |
| 382 } | |
| 383 else if (strcmp_P(readbuf, PSTR("addall"))== 0) | |
| 384 { | |
| 385 cmd_add_all(); | |
| 386 } | |
| 387 else if (strcmp_P(readbuf, PSTR("init")) == 0) | |
| 388 { | |
| 389 cmd_init(); | |
| 390 } | |
| 0 | 391 else |
| 392 { | |
| 6 | 393 printf_P(PSTR("Bad command\n")); |
| 0 | 394 } |
| 395 } | |
| 396 | |
| 2 | 397 ISR(USART_RX_vect) |
| 0 | 398 { |
| 2 | 399 char c = UDR0; |
| 12 | 400 uart_putchar(c, NULL); |
| 401 if (c == '\r') | |
| 0 | 402 { |
| 403 readbuf[readpos] = '\0'; | |
| 404 read_handler(); | |
| 405 readpos = 0; | |
| 406 } | |
| 407 else | |
| 408 { | |
| 409 readbuf[readpos] = c; | |
| 410 readpos++; | |
| 411 if (readpos >= sizeof(readbuf)) | |
| 412 { | |
| 413 readpos = 0; | |
| 414 } | |
| 415 } | |
| 416 } | |
| 417 | |
| 2 | 418 ISR(TIMER2_COMPA_vect) |
| 1 | 419 { |
| 14 | 420 TCNT2 = 0; |
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421 measure_count ++; |
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422 comms_count ++; |
| 12 | 423 printf("measure_count %d\n", measure_count); |
| 14 | 424 if (measure_count >= MEASURE_WAKE) |
| 1 | 425 { |
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426 measure_count = 0; |
| 12 | 427 printf("need_measurement = 1\n"); |
| 1 | 428 need_measurement = 1; |
| 429 } | |
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430 |
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431 if (comms_count == COMMS_WAKE) |
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432 { |
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433 comms_count = 0; |
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434 need_comms = 1; |
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435 } |
| 1 | 436 } |
| 437 | |
| 3 | 438 DWORD get_fattime (void) |
| 439 { | |
| 440 return 0; | |
| 441 } | |
| 442 | |
| 1 | 443 static void |
| 444 deep_sleep() | |
| 445 { | |
| 446 // p119 of manual | |
| 2 | 447 OCR2A = SLEEP_COMPARE; |
| 448 loop_until_bit_is_clear(ASSR, OCR2AUB); | |
| 1 | 449 |
| 450 set_sleep_mode(SLEEP_MODE_PWR_SAVE); | |
| 451 sleep_mode(); | |
| 452 } | |
| 453 | |
| 454 static void | |
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455 idle_sleep() |
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456 { |
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457 set_sleep_mode(SLEEP_MODE_IDLE); |
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458 sleep_mode(); |
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459 } |
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460 |
| 14 | 461 #if 0 |
| 462 // untested | |
| 6 | 463 static void |
| 464 do_adc_335() | |
| 465 { | |
| 8 | 466 //PRR &= ~_BV(PRADC); |
| 6 | 467 |
| 468 ADMUX = _BV(ADLAR); | |
| 469 | |
| 470 // ADPS2 = /16 prescaler, 62khz at 1mhz clock | |
| 471 ADCSRA = _BV(ADEN) | _BV(ADPS2); | |
| 472 | |
| 473 // measure value | |
| 474 ADCSRA |= _BV(ADSC); | |
| 475 loop_until_bit_is_clear(ADCSRA, ADSC); | |
| 476 uint8_t low = ADCL; | |
| 477 uint8_t high = ADCH; | |
| 478 uint16_t f_measure = low + (high << 8); | |
| 479 | |
| 480 // set to measure 1.1 reference | |
| 481 ADMUX = _BV(ADLAR) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1); | |
| 482 ADCSRA |= _BV(ADSC); | |
| 483 loop_until_bit_is_clear(ADCSRA, ADSC); | |
| 484 uint8_t low_11 = ADCL; | |
| 485 uint8_t high_11 = ADCH; | |
| 486 uint16_t f_11 = low_11 + (high_11 << 8); | |
| 487 | |
| 488 float res_volts = 1.1 * f_measure / f_11; | |
| 489 | |
| 490 // 10mV/degree | |
| 491 // scale to 1/5 degree units above 0C | |
| 492 int temp = (res_volts - 2.73) * 500; | |
| 13 | 493 // XXX fixme |
| 494 //measurements[n_measurements] = temp; | |
| 6 | 495 // XXX something if it hits the limit |
| 496 | |
| 497 // measure AVR internal temperature against 1.1 ref. | |
| 498 ADMUX = _BV(ADLAR) | _BV(MUX3) | _BV(REFS1) | _BV(REFS0); | |
| 499 ADCSRA |= _BV(ADSC); | |
| 500 loop_until_bit_is_clear(ADCSRA, ADSC); | |
| 501 uint16_t res_internal = ADCL; | |
| 502 res_internal |= ADCH << 8; | |
| 503 | |
| 504 float internal_volts = res_internal * (1.1 / 1024.0); | |
| 505 | |
| 506 // 1mV/degree | |
| 507 int internal_temp = (internal_volts - 2.73) * 5000; | |
| 13 | 508 // XXX fixme |
| 509 //internal_measurements[n_measurements] = internal_temp; | |
| 6 | 510 |
| 511 printf_P("measure %d: external %d, internal %d, 1.1 %d\n", | |
| 512 n_measurements, temp, internal_temp, f_11); | |
| 513 | |
| 514 n_measurements++; | |
| 8 | 515 //PRR |= _BV(PRADC); |
| 6 | 516 } |
| 14 | 517 #endif |
| 6 | 518 |
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519 static void |
| 1 | 520 do_measurement() |
| 521 { | |
| 13 | 522 uint8_t n_sensors; |
| 14 | 523 printf("do_measurement\n"); |
| 13 | 524 eeprom_read(n_sensors, n_sensors); |
| 14 | 525 printf("do_measurement sensors %d\n", n_sensors); |
| 13 | 526 |
| 527 uint8_t ret = simple_ds18b20_start_meas(NULL); | |
| 14 | 528 printf_P(PSTR("Read all sensors, ret %d, waiting...\n"), ret); |
| 13 | 529 _delay_ms(DS18B20_TCONV_12BIT); |
| 530 | |
| 531 if (n_measurements == NUM_MEASUREMENTS) | |
| 532 { | |
| 14 | 533 printf_P(PSTR("Measurements .overflow\n")); |
| 13 | 534 n_measurements = 0; |
| 535 } | |
| 6 | 536 |
| 14 | 537 for (uint8_t s = 0; s < MAX_SENSORS; s++) |
| 13 | 538 { |
| 539 int16_t decicelsius; | |
| 14 | 540 if (s >= n_sensors) |
| 13 | 541 { |
| 542 decicelsius = VALUE_NOSENSOR; | |
| 543 } | |
| 544 else | |
| 545 { | |
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546 uint8_t id[ID_LEN]; |
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547 eeprom_read_to(id, sensor_id[s], ID_LEN); |
| 13 | 548 |
| 549 uint8_t ret = simple_ds18b20_read_decicelsius(id, &decicelsius); | |
| 550 if (ret != DS18X20_OK) | |
| 551 { | |
| 552 decicelsius = VALUE_BROKEN; | |
| 553 } | |
| 554 } | |
| 14 | 555 measurements[n_measurements][s] = decicelsius; |
| 13 | 556 } |
| 14 | 557 n_measurements++; |
| 12 | 558 //do_adc_335(); |
| 1 | 559 } |
| 560 | |
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561 static void |
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562 do_comms() |
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563 { |
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564 need_comms = 0; |
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565 |
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566 // turn on bluetooth |
| 7 | 567 uart_on(); |
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568 |
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569 // write sd card here? same 3.3v regulator... |
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570 |
| 12 | 571 printf("ready> \n"); |
| 572 | |
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573 comms_done = 0; |
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574 for (;;) |
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575 { |
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576 if (comms_done) |
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577 { |
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578 break; |
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579 } |
| 6 | 580 |
| 581 if (need_measurement) | |
| 582 { | |
| 14 | 583 need_measurement = 0; |
| 584 printf("measure from do_comms\n"); | |
| 6 | 585 do_measurement(); |
| 586 } | |
| 587 | |
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588 idle_sleep(); |
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589 } |
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590 |
| 6 | 591 uart_off(); |
| 592 | |
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593 // turn off bluetooth |
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594 } |
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595 |
| 7 | 596 static void |
| 597 blink() | |
| 598 { | |
| 599 PORT_LED &= ~_BV(PIN_LED); | |
| 9 | 600 _delay_ms(1); |
| 7 | 601 PORT_LED |= _BV(PIN_LED); |
| 602 } | |
| 603 | |
| 604 static void | |
| 605 long_delay(int ms) | |
| 606 { | |
| 607 int iter = ms / 100; | |
| 608 | |
| 609 for (int i = 0; i < iter; i++) | |
| 610 { | |
| 611 _delay_ms(100); | |
| 612 } | |
| 613 } | |
| 614 | |
| 8 | 615 ISR(BADISR_vect) |
| 616 { | |
| 14 | 617 //uart_on(); |
| 8 | 618 printf_P(PSTR("Bad interrupt\n")); |
| 619 } | |
| 620 | |
| 9 | 621 static void |
| 622 set_2mhz() | |
| 623 { | |
| 624 cli(); | |
| 625 CLKPR = _BV(CLKPCE); | |
| 626 // divide by 4 | |
| 627 CLKPR = _BV(CLKPS1); | |
| 628 sei(); | |
| 629 } | |
| 630 | |
| 0 | 631 int main(void) |
| 632 { | |
| 9 | 633 set_2mhz(); |
| 634 | |
| 7 | 635 DDR_LED |= _BV(PIN_LED); |
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636 DDR_SHDN |= _BV(PIN_SHDN); |
| 8 | 637 blink(); |
| 7 | 638 |
| 6 | 639 stdout = &mystdout; |
| 7 | 640 uart_on(); |
| 641 | |
| 6 | 642 fprintf_P(&mystdout, PSTR("hello %d\n"), 12); |
| 13 | 643 |
| 644 check_first_startup(); | |
| 645 | |
| 8 | 646 uart_off(); |
| 0 | 647 |
| 6 | 648 // turn off everything except timer2 |
| 8 | 649 //PRR = _BV(PRTWI) | _BV(PRTIM0) | _BV(PRTIM1) | _BV(PRSPI) | _BV(PRUSART0) | _BV(PRADC); |
| 650 | |
| 651 // for testing | |
| 652 uart_on(); | |
| 653 | |
| 12 | 654 sei(); |
| 8 | 655 |
| 1 | 656 // set up counter2. |
| 657 // COM21 COM20 Set OC2 on Compare Match (p116) | |
| 658 // WGM21 Clear counter on compare | |
| 14 | 659 //TCCR2A = _BV(COM2A1) | _BV(COM2A0) | _BV(WGM21); |
| 660 // toggle on match | |
| 661 TCCR2A = _BV(COM2A0); | |
| 1 | 662 // CS22 CS21 CS20 clk/1024 |
| 2 | 663 TCCR2B = _BV(CS22) | _BV(CS21) | _BV(CS20); |
| 1 | 664 // set async mode |
| 665 ASSR |= _BV(AS2); | |
| 14 | 666 TCNT2 = 0; |
| 667 OCR2A = SLEEP_COMPARE; | |
| 8 | 668 // interrupt |
| 669 TIMSK2 = _BV(OCIE2A); | |
| 0 | 670 |
| 6 | 671 for (;;) |
| 672 { | |
| 12 | 673 do_comms(); |
| 6 | 674 } |
| 12 | 675 |
| 0 | 676 for(;;){ |
| 677 /* insert your main loop code here */ | |
| 1 | 678 if (need_measurement) |
| 679 { | |
| 14 | 680 need_measurement = 0; |
| 1 | 681 do_measurement(); |
| 14 | 682 // testing |
| 683 cmd_fetch(); | |
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684 continue; |
| 1 | 685 } |
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686 |
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687 if (need_comms) |
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688 { |
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689 do_comms(); |
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690 continue; |
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691 } |
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692 |
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693 deep_sleep(); |
| 9 | 694 blink(); |
| 10 | 695 printf("."); |
| 0 | 696 } |
| 12 | 697 |
| 0 | 698 return 0; /* never reached */ |
| 699 } |