Mercurial > templog
annotate main.c @ 385:a827f1c5ddbe
don't stay awake for any command - chews battery if server goes down
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Mon, 09 Jul 2012 00:39:07 +0800 |
| parents | f429169aa3cd |
| children | 1e2068c5413a |
| rev | line source |
|---|---|
| 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> |
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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 | |
| 307 | 26 // 1 second. we have 1024 prescaler, 32768 crystal. |
| 308 | 27 #define SLEEP_COMPARE 32 |
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28 // limited to uint16_t |
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29 #define MEASURE_WAKE 140 |
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30 |
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31 #define VALUE_NOSENSOR 0x07D0 // 125 degrees |
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32 #define VALUE_BROKEN 0x07D1 // 125.0625 |
| 319 | 33 |
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34 // limited to uint16_t |
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35 #define COMMS_WAKE 3600 // XXX testing |
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36 // limited to uint8_t |
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37 #define WAKE_SECS 30 // XXX testing |
| 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 |
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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 |
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50 // limited to uint16_t |
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51 // XXX - increasing this to 300 causes strange failures, |
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52 // not sure why |
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53 #define NUM_MEASUREMENTS 280 |
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54 // limited to uint8_t |
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55 #define MAX_SENSORS 3 |
| 312 | 56 |
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57 // fixed at 8, have a shorter name |
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58 #define ID_LEN OW_ROMCODE_SIZE |
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59 |
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60 // #define HAVE_UART_ECHO |
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61 |
| 316 | 62 int uart_putchar(char c, FILE *stream); |
| 320 | 63 static void long_delay(int ms); |
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64 static void blink(); |
| 365 | 65 static uint16_t adc_vcc(); |
| 320 | 66 |
| 306 | 67 static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL, |
| 68 _FDEV_SETUP_WRITE); | |
| 69 | |
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70 uint16_t crc_out; |
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71 static FILE _crc_stdout = FDEV_SETUP_STREAM(uart_putchar, NULL, |
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72 _FDEV_SETUP_WRITE); |
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73 // convenience |
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74 static FILE *crc_stdout = &_crc_stdout; |
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75 |
| 365 | 76 // ---- Atomic guards required accessing these variables |
| 77 static uint32_t clock_epoch; | |
| 78 static uint16_t comms_count; | |
| 79 static uint16_t measure_count; | |
| 80 // ---- End atomic guards required | |
| 81 | |
| 323 | 82 static uint16_t n_measurements; |
| 365 | 83 |
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84 // stored as |
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85 static uint16_t measurements[NUM_MEASUREMENTS][MAX_SENSORS]; |
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86 static uint32_t first_measurement_clock; |
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87 // last_measurement_clock is redundant but checks that we're not missing |
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88 // samples |
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89 static uint32_t last_measurement_clock; |
| 306 | 90 |
| 365 | 91 static uint32_t last_comms_clock; |
| 92 | |
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93 // boolean flags |
| 323 | 94 static uint8_t need_measurement; |
| 95 static uint8_t need_comms; | |
| 346 | 96 static uint8_t uart_enabled; |
| 307 | 97 |
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98 // counts down from WAKE_SECS to 0, goes to deep sleep when hits 0 |
| 323 | 99 static uint8_t comms_timeout; |
| 307 | 100 |
| 323 | 101 static uint8_t readpos; |
| 306 | 102 static char readbuf[30]; |
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103 static uint8_t have_cmd; |
| 306 | 104 |
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105 uint8_t n_sensors; |
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106 uint8_t sensor_id[MAX_SENSORS][ID_LEN]; |
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107 |
| 319 | 108 // thanks to http://projectgus.com/2010/07/eeprom-access-with-arduino/ |
| 109 #define eeprom_read_to(dst_p, eeprom_field, dst_size) eeprom_read_block((dst_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (dst_size)) | |
| 110 #define eeprom_read(dst, eeprom_field) eeprom_read_to((&dst), eeprom_field, sizeof(dst)) | |
| 111 #define eeprom_write_from(src_p, eeprom_field, src_size) eeprom_write_block((src_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (src_size)) | |
| 112 #define eeprom_write(src, eeprom_field) { eeprom_write_from(&src, eeprom_field, sizeof(src)); } | |
| 113 | |
| 114 #define EXPECT_MAGIC 0x67c9 | |
| 115 | |
| 116 struct __attribute__ ((__packed__)) __eeprom_data { | |
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117 // XXX eeprom unused at present |
| 319 | 118 uint16_t magic; |
| 119 }; | |
| 120 | |
| 314 | 121 #define DEBUG(str) printf_P(PSTR(str)) |
| 122 | |
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123 static void deep_sleep(); |
| 307 | 124 |
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125 // Very first setup |
| 324 | 126 static void |
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127 setup_chip() |
| 324 | 128 { |
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129 cli(); |
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130 |
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131 // stop watchdog timer (might have been used to cause a reset) |
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132 wdt_reset(); |
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133 MCUSR &= ~_BV(WDRF); |
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134 WDTCSR |= _BV(WDCE) | _BV(WDE); |
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135 WDTCSR = 0; |
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136 |
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137 // Set clock to 2mhz |
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138 CLKPR = _BV(CLKPCE); |
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139 // divide by 4 |
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140 CLKPR = _BV(CLKPS1); |
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141 |
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142 // enable pullups |
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143 PORTB = 0xff; // XXX change when using SPI |
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144 PORTD = 0xff; |
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145 PORTC = 0xff; |
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146 |
| 325 | 147 // 3.3v power for bluetooth and SD |
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148 DDR_LED |= _BV(PIN_LED); |
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149 DDR_SHDN |= _BV(PIN_SHDN); |
| 325 | 150 |
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151 // set pullup |
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152 PORTD |= _BV(PD2); |
| 347 | 153 // INT0 setup |
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154 EICRA = (1<<ISC01); // falling edge - data sheet says it won't work? |
| 347 | 155 EIMSK = _BV(INT0); |
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156 |
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157 // comparator disable |
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158 ACSR = _BV(ACD); |
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159 |
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160 // disable adc pin input buffers |
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161 DIDR0 = 0x3F; // acd0-adc5 |
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162 DIDR1 = (1<<AIN1D)|(1<<AIN0D); // ain0/ain1 |
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163 |
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164 sei(); |
| 324 | 165 } |
| 166 | |
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167 static void |
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168 set_aux_power(uint8_t on) |
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169 { |
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170 if (on) |
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171 { |
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172 PORT_SHDN &= ~_BV(PIN_SHDN); |
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173 } |
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174 else |
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175 { |
| 349 | 176 PORT_SHDN |= _BV(PIN_SHDN); |
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177 } |
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178 } |
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179 |
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180 static void |
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181 setup_tick_counter() |
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182 { |
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183 // set up counter2. |
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184 // COM21 COM20 Set OC2 on Compare Match (p116) |
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185 // WGM21 Clear counter on compare |
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186 //TCCR2A = _BV(COM2A1) | _BV(COM2A0) | _BV(WGM21); |
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187 // toggle on match |
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188 TCCR2A = _BV(COM2A0); |
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189 // CS22 CS21 CS20 clk/1024 |
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190 TCCR2B = _BV(CS22) | _BV(CS21) | _BV(CS20); |
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191 // set async mode |
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192 ASSR |= _BV(AS2); |
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193 TCNT2 = 0; |
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194 OCR2A = SLEEP_COMPARE; |
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195 // interrupt |
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196 TIMSK2 = _BV(OCIE2A); |
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197 } |
| 324 | 198 |
| 306 | 199 static void |
| 313 | 200 uart_on() |
| 306 | 201 { |
| 314 | 202 // Power reduction register |
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203 PRR &= ~_BV(PRUSART0); |
| 314 | 204 |
|
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205 // All of this needs to be done each time after turning off the PRR |
| 306 | 206 // baud rate |
| 313 | 207 UBRR0H = (unsigned char)(UBRR >> 8); |
| 208 UBRR0L = (unsigned char)UBRR; | |
| 209 // set 2x clock, improves accuracy of UBRR | |
| 210 UCSR0A |= _BV(U2X0); | |
| 312 | 211 UCSR0B = _BV(RXCIE0) | _BV(RXEN0) | _BV(TXEN0); |
| 306 | 212 //8N1 |
| 313 | 213 UCSR0C = _BV(UCSZ01) | _BV(UCSZ00); |
| 347 | 214 uart_enabled = 1; |
| 312 | 215 } |
| 216 | |
| 217 static void | |
| 218 uart_off() | |
| 219 { | |
| 220 // Turn of interrupts and disable tx/rx | |
| 221 UCSR0B = 0; | |
| 347 | 222 uart_enabled = 0; |
| 312 | 223 |
| 224 // Power reduction register | |
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225 PRR |= _BV(PRUSART0); |
| 306 | 226 } |
| 227 | |
| 316 | 228 int |
| 306 | 229 uart_putchar(char c, FILE *stream) |
| 230 { | |
| 347 | 231 if (!uart_enabled) |
| 232 { | |
| 233 return EOF; | |
| 234 } | |
|
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235 // XXX could perhaps sleep in the loop for power. |
| 314 | 236 if (c == '\n') |
| 237 { | |
| 316 | 238 loop_until_bit_is_set(UCSR0A, UDRE0); |
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239 UDR0 = '\r'; |
| 314 | 240 } |
| 308 | 241 loop_until_bit_is_set(UCSR0A, UDRE0); |
| 242 UDR0 = c; | |
|
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243 if (stream == crc_stdout) |
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244 { |
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245 crc_out = _crc_ccitt_update(crc_out, c); |
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246 } |
| 316 | 247 if (c == '\r') |
| 248 { | |
| 249 loop_until_bit_is_set(UCSR0A, UDRE0); | |
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250 UDR0 = '\n'; |
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251 if (stream == crc_stdout) |
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252 { |
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253 crc_out = _crc_ccitt_update(crc_out, '\n'); |
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254 } |
| 316 | 255 } |
| 346 | 256 return (unsigned char)c; |
| 306 | 257 } |
| 258 | |
| 259 static void | |
| 260 cmd_fetch() | |
| 261 { | |
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262 crc_out = 0; |
| 365 | 263 uint16_t millivolt_vcc = adc_vcc(); |
|
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264 |
| 365 | 265 uint32_t epoch_copy; |
| 266 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) | |
| 267 { | |
| 268 epoch_copy = clock_epoch; | |
| 269 } | |
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270 |
| 366 | 271 fprintf_P(crc_stdout, PSTR("START\n" |
| 272 "now=%lu\n" | |
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273 "time_step=%hu\n" |
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333
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274 "first_time=%lu\n" |
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275 "last_time=%lu\n" |
| 365 | 276 "comms_time=%lu\n" |
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277 "voltage=%hu\n" |
| 366 | 278 ), |
| 365 | 279 epoch_copy, |
|
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280 (uint16_t)MEASURE_WAKE, |
|
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281 first_measurement_clock, |
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282 last_measurement_clock, |
| 365 | 283 last_comms_clock, |
| 284 millivolt_vcc | |
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285 ); |
|
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286 fprintf_P(crc_stdout, PSTR("sensors=%u\n"), n_sensors); |
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287 for (uint8_t s = 0; s < n_sensors; s++) |
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288 { |
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289 fprintf_P(crc_stdout, PSTR("sensor_id%u="), s); |
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290 printhex(sensor_id[s], ID_LEN, crc_stdout); |
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291 fputc('\n', crc_stdout); |
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292 } |
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293 fprintf_P(crc_stdout, PSTR("measurements=%hu\n"), n_measurements); |
| 320 | 294 for (uint16_t n = 0; n < n_measurements; n++) |
| 306 | 295 { |
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296 fprintf_P(crc_stdout, PSTR("meas%hu="), n); |
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297 for (uint8_t s = 0; s < n_sensors; s++) |
| 319 | 298 { |
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299 fprintf_P(crc_stdout, PSTR(" %04hx"), measurements[n][s]); |
| 319 | 300 } |
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301 fputc('\n', crc_stdout); |
| 306 | 302 } |
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303 fprintf_P(crc_stdout, PSTR("END\n")); |
|
331
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304 fprintf_P(stdout, PSTR("CRC=%hu\n"), crc_out); |
| 306 | 305 } |
| 306 | |
| 307 static void | |
| 308 cmd_clear() | |
| 309 { | |
| 313 | 310 n_measurements = 0; |
| 338 | 311 printf_P(PSTR("cleared\n")); |
| 306 | 312 } |
| 313 | |
| 314 static void | |
| 315 cmd_btoff() | |
| 316 { | |
| 365 | 317 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
| 318 { | |
| 319 comms_count = 0; | |
| 320 } | |
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321 printf_P(PSTR("off:%hu\n"), COMMS_WAKE); |
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322 _delay_ms(100); |
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323 comms_timeout = 0; |
| 306 | 324 } |
| 325 | |
| 326 static void | |
|
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327 cmd_reset() |
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328 { |
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329 printf_P(PSTR("reset\n")); |
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330 _delay_ms(100); |
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331 cli(); // disable interrupts |
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332 wdt_enable(WDTO_15MS); // enable watchdog |
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333 while(1); // wait for watchdog to reset processor |
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334 } |
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335 |
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336 static void |
| 318 | 337 cmd_measure() |
| 338 { | |
|
339
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339 printf_P(PSTR("measuring\n")); |
| 318 | 340 need_measurement = 1; |
| 341 } | |
| 342 | |
| 343 static void | |
| 344 cmd_sensors() | |
| 345 { | |
| 346 uint8_t ret = simple_ds18b20_start_meas(NULL); | |
| 320 | 347 printf_P(PSTR("All sensors, ret %d, waiting...\n"), ret); |
| 348 long_delay(DS18B20_TCONV_12BIT); | |
| 318 | 349 simple_ds18b20_read_all(); |
| 350 } | |
| 351 | |
|
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352 #if 0 |
| 319 | 353 // 0 on success |
| 354 static uint8_t | |
| 355 get_hex_string(const char *hex, uint8_t *out, uint8_t size) | |
| 356 { | |
| 357 uint8_t upper; | |
| 358 uint8_t o; | |
| 359 for (uint8_t i = 0, z = 0; o < size; i++) | |
| 360 { | |
| 361 uint8_t h = hex[i]; | |
| 362 if (h >= 'A' && h <= 'F') | |
| 363 { | |
| 364 // lower case | |
| 365 h += 0x20; | |
| 366 } | |
| 367 uint8_t nibble; | |
| 368 if (h >= '0' && h <= '9') | |
| 369 { | |
| 370 nibble = h - '0'; | |
| 371 } | |
| 372 else if (h >= 'a' && h <= 'f') | |
| 373 { | |
| 374 nibble = 10 + h - 'a'; | |
| 375 } | |
| 376 else if (h == ' ' || h == ':') | |
| 377 { | |
| 378 continue; | |
| 379 } | |
| 380 else | |
| 381 { | |
| 382 printf_P(PSTR("Bad hex 0x%x '%c'\n"), hex[i], hex[i]); | |
| 383 return 1; | |
| 384 } | |
| 385 | |
| 386 if (z % 2 == 0) | |
| 387 { | |
| 388 upper = nibble << 4; | |
| 389 } | |
| 390 else | |
| 391 { | |
| 392 out[o] = upper | nibble; | |
| 393 o++; | |
| 394 } | |
| 395 | |
| 396 z++; | |
| 397 } | |
| 398 | |
| 399 if (o != size) | |
| 400 { | |
| 401 printf_P(PSTR("Short hex\n")); | |
| 402 return 1; | |
| 403 } | |
| 404 return 0; | |
| 405 } | |
|
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406 #endif |
| 319 | 407 |
| 408 static void | |
|
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409 init_sensors() |
| 319 | 410 { |
| 347 | 411 uint8_t id[OW_ROMCODE_SIZE]; |
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412 printf_P(PSTR("init sensors\n")); |
| 319 | 413 ow_reset(); |
| 347 | 414 for( uint8_t diff = OW_SEARCH_FIRST; diff != OW_LAST_DEVICE; ) |
| 415 { | |
| 416 diff = ow_rom_search( diff, &id[0] ); | |
| 417 if( diff == OW_PRESENCE_ERR ) { | |
| 418 printf_P( PSTR("No Sensor found\r") ); | |
| 419 return; | |
| 420 } | |
| 421 | |
| 422 if( diff == OW_DATA_ERR ) { | |
| 423 printf_P( PSTR("Bus Error\r") ); | |
| 424 return; | |
| 425 } | |
|
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426 |
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427 if (n_sensors < MAX_SENSORS) |
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428 { |
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429 memcpy(sensor_id[n_sensors], id, ID_LEN); |
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430 printf_P(PSTR("Added sensor %d : "), n_sensors); |
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431 printhex(id, ID_LEN, stdout); |
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432 putchar('\n'); |
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433 n_sensors++; |
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434 } |
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435 else |
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436 { |
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437 printf_P(PSTR("Too many sensors\n")); |
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438 } |
| 319 | 439 } |
| 440 } | |
| 441 | |
| 442 static void | |
| 443 check_first_startup() | |
| 444 { | |
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445 #if 0 |
| 319 | 446 uint16_t magic; |
| 447 eeprom_read(magic, magic); | |
| 448 if (magic != EXPECT_MAGIC) | |
| 449 { | |
| 450 printf_P(PSTR("First boot, looking for sensors...\n")); | |
|
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451 // in case of power fumbles don't want to reset during eeprom write, |
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452 long_delay(2); |
| 319 | 453 cmd_init(); |
| 454 cmd_add_all(); | |
| 320 | 455 cli(); |
| 456 magic = EXPECT_MAGIC; | |
| 457 eeprom_write(magic, magic); | |
| 458 sei(); | |
| 319 | 459 } |
|
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460 #endif |
| 319 | 461 } |
| 462 | |
| 318 | 463 static void |
| 306 | 464 read_handler() |
| 465 { | |
| 312 | 466 if (strcmp_P(readbuf, PSTR("fetch")) == 0) |
| 306 | 467 { |
| 468 cmd_fetch(); | |
| 469 } | |
| 312 | 470 else if (strcmp_P(readbuf, PSTR("clear")) == 0) |
| 306 | 471 { |
| 472 cmd_clear(); | |
| 473 } | |
| 312 | 474 else if (strcmp_P(readbuf, PSTR("btoff")) == 0) |
| 306 | 475 { |
| 476 cmd_btoff(); | |
| 477 } | |
| 318 | 478 else if (strcmp_P(readbuf, PSTR("measure")) == 0) |
| 479 { | |
| 480 cmd_measure(); | |
| 481 } | |
| 482 else if (strcmp_P(readbuf, PSTR("sensors")) == 0) | |
| 483 { | |
| 484 cmd_sensors(); | |
| 485 } | |
|
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486 else if (strcmp_P(readbuf, PSTR("reset")) == 0) |
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487 { |
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488 cmd_reset(); |
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489 } |
| 306 | 490 else |
| 491 { | |
| 312 | 492 printf_P(PSTR("Bad command\n")); |
| 306 | 493 } |
| 494 } | |
| 495 | |
|
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496 ISR(INT0_vect) |
| 324 | 497 { |
| 347 | 498 need_comms = 1; |
|
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499 comms_timeout = WAKE_SECS; |
|
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500 blink(); |
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501 _delay_ms(100); |
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502 blink(); |
| 324 | 503 } |
| 504 | |
| 505 | |
| 308 | 506 ISR(USART_RX_vect) |
| 306 | 507 { |
| 308 | 508 char c = UDR0; |
|
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509 #ifdef HAVE_UART_ECHO |
| 318 | 510 uart_putchar(c, NULL); |
|
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511 #endif |
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512 if (c == '\r' || c == '\n') |
| 306 | 513 { |
|
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514 if (readpos > 0) |
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515 { |
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516 readbuf[readpos] = '\0'; |
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517 have_cmd = 1; |
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518 readpos = 0; |
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519 } |
| 306 | 520 } |
| 521 else | |
| 522 { | |
| 523 readbuf[readpos] = c; | |
| 524 readpos++; | |
| 525 if (readpos >= sizeof(readbuf)) | |
| 526 { | |
| 527 readpos = 0; | |
| 528 } | |
| 529 } | |
| 530 } | |
| 531 | |
| 308 | 532 ISR(TIMER2_COMPA_vect) |
| 307 | 533 { |
| 320 | 534 TCNT2 = 0; |
|
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535 measure_count ++; |
| 347 | 536 comms_count ++; |
|
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537 |
| 323 | 538 clock_epoch ++; |
| 539 | |
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540 if (comms_timeout != 0) |
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541 { |
| 349 | 542 comms_timeout--; |
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543 } |
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544 |
| 320 | 545 if (measure_count >= MEASURE_WAKE) |
| 307 | 546 { |
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547 measure_count = 0; |
| 307 | 548 need_measurement = 1; |
| 549 } | |
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550 |
| 347 | 551 if (comms_count >= COMMS_WAKE) |
| 552 { | |
| 553 comms_count = 0; | |
| 554 need_comms = 1; | |
| 555 } | |
| 307 | 556 } |
| 557 | |
| 309 | 558 DWORD get_fattime (void) |
| 559 { | |
| 560 return 0; | |
| 561 } | |
| 562 | |
| 307 | 563 static void |
| 564 deep_sleep() | |
| 565 { | |
| 566 // p119 of manual | |
| 308 | 567 OCR2A = SLEEP_COMPARE; |
| 568 loop_until_bit_is_clear(ASSR, OCR2AUB); | |
| 307 | 569 |
| 570 set_sleep_mode(SLEEP_MODE_PWR_SAVE); | |
| 571 sleep_mode(); | |
| 572 } | |
| 573 | |
| 574 static void | |
|
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575 idle_sleep() |
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576 { |
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577 set_sleep_mode(SLEEP_MODE_IDLE); |
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578 sleep_mode(); |
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579 } |
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580 |
| 365 | 581 static uint16_t |
| 582 adc_vcc() | |
|
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583 { |
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584 PRR &= ~_BV(PRADC); |
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585 |
| 368 | 586 // /16 prescaler |
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587 ADCSRA = _BV(ADEN) | _BV(ADPS2); |
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588 |
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589 // set to measure 1.1 reference |
| 364 | 590 ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1); |
| 366 | 591 // average a number of samples |
| 592 uint16_t sum = 0; | |
| 593 uint8_t num = 0; | |
| 594 for (uint8_t n = 0; n < 20; n++) | |
| 365 | 595 { |
| 596 ADCSRA |= _BV(ADSC); | |
| 597 loop_until_bit_is_clear(ADCSRA, ADSC); | |
|
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598 |
| 366 | 599 uint8_t low_11 = ADCL; |
| 600 uint8_t high_11 = ADCH; | |
| 601 uint16_t val = low_11 + (high_11 << 8); | |
| 312 | 602 |
| 366 | 603 if (n >= 4) |
| 604 { | |
| 605 sum += val; | |
| 606 num++; | |
| 607 } | |
| 608 } | |
| 609 ADCSRA = 0; | |
| 610 PRR |= _BV(PRADC); | |
| 312 | 611 |
| 366 | 612 float res_volts = 1.1 * 1024 * num / sum; |
| 312 | 613 |
| 365 | 614 return 1000 * res_volts; |
| 312 | 615 } |
| 616 | |
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617 static void |
| 307 | 618 do_measurement() |
| 619 { | |
|
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620 blink(); |
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621 |
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622 simple_ds18b20_start_meas(NULL); |
| 365 | 623 // sleep rather than using a long delay |
| 624 deep_sleep(); | |
| 625 //_delay_ms(DS18B20_TCONV_12BIT); | |
| 319 | 626 |
| 627 if (n_measurements == NUM_MEASUREMENTS) | |
| 628 { | |
| 629 n_measurements = 0; | |
| 630 } | |
| 312 | 631 |
| 320 | 632 for (uint8_t s = 0; s < MAX_SENSORS; s++) |
| 319 | 633 { |
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634 uint16_t reading; |
| 320 | 635 if (s >= n_sensors) |
| 319 | 636 { |
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637 reading = VALUE_NOSENSOR; |
| 319 | 638 } |
| 639 else | |
| 640 { | |
|
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641 uint8_t ret = simple_ds18b20_read_raw(sensor_id[s], &reading); |
| 319 | 642 if (ret != DS18X20_OK) |
| 643 { | |
|
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644 reading = VALUE_BROKEN; |
| 319 | 645 } |
| 646 } | |
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647 measurements[n_measurements][s] = reading; |
| 319 | 648 } |
|
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649 |
| 365 | 650 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
|
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|
651 { |
| 365 | 652 if (n_measurements == 0) |
| 653 { | |
| 654 first_measurement_clock = clock_epoch; | |
| 655 } | |
| 656 last_measurement_clock = clock_epoch; | |
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657 } |
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|
658 |
| 320 | 659 n_measurements++; |
| 318 | 660 //do_adc_335(); |
| 307 | 661 } |
| 662 | |
|
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663 static void |
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|
664 do_comms() |
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665 { |
| 347 | 666 // turn on bluetooth |
| 365 | 667 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
| 668 { | |
| 669 last_comms_clock = clock_epoch; | |
| 670 } | |
|
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671 set_aux_power(1); |
| 313 | 672 uart_on(); |
| 347 | 673 |
| 674 // write sd card here? same 3.3v regulator... | |
| 675 | |
| 676 for (comms_timeout = WAKE_SECS; comms_timeout > 0; ) | |
| 677 { | |
| 312 | 678 if (need_measurement) |
| 679 { | |
| 320 | 680 need_measurement = 0; |
| 312 | 681 do_measurement(); |
| 349 | 682 continue; |
| 312 | 683 } |
| 684 | |
|
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|
685 if (have_cmd) |
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|
686 { |
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|
687 have_cmd = 0; |
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|
688 read_handler(); |
| 349 | 689 continue; |
|
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|
690 } |
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|
691 |
|
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|
692 // wait for commands from the master |
| 347 | 693 idle_sleep(); |
| 694 } | |
|
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|
695 |
| 312 | 696 uart_off(); |
|
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|
697 // in case bluetooth takes time to flush |
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698 _delay_ms(100); |
|
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699 set_aux_power(0); |
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|
700 } |
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|
701 |
| 313 | 702 static void |
| 703 blink() | |
| 704 { | |
| 705 PORT_LED &= ~_BV(PIN_LED); | |
| 315 | 706 _delay_ms(1); |
| 313 | 707 PORT_LED |= _BV(PIN_LED); |
| 708 } | |
| 709 | |
| 710 static void | |
| 711 long_delay(int ms) | |
| 712 { | |
| 713 int iter = ms / 100; | |
| 714 | |
| 715 for (int i = 0; i < iter; i++) | |
| 716 { | |
| 717 _delay_ms(100); | |
| 718 } | |
| 719 } | |
| 720 | |
| 314 | 721 ISR(BADISR_vect) |
| 722 { | |
| 320 | 723 //uart_on(); |
| 314 | 724 printf_P(PSTR("Bad interrupt\n")); |
| 725 } | |
| 726 | |
| 306 | 727 int main(void) |
| 728 { | |
|
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|
729 setup_chip(); |
|
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|
730 blink(); |
| 315 | 731 |
|
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732 set_aux_power(0); |
| 313 | 733 |
| 312 | 734 stdout = &mystdout; |
| 313 | 735 uart_on(); |
| 736 | |
|
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737 printf(PSTR("Started.\n")); |
| 319 | 738 |
| 739 check_first_startup(); | |
| 740 | |
|
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|
741 init_sensors(); |
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|
742 |
| 314 | 743 uart_off(); |
| 306 | 744 |
| 312 | 745 // turn off everything except timer2 |
|
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|
746 PRR = _BV(PRTWI) | _BV(PRTIM0) | _BV(PRTIM1) | _BV(PRSPI) | _BV(PRUSART0) | _BV(PRADC); |
| 314 | 747 |
| 748 // for testing | |
| 749 uart_on(); | |
| 750 | |
|
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|
751 setup_tick_counter(); |
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752 |
| 318 | 753 sei(); |
| 314 | 754 |
|
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|
755 need_comms = 1; |
|
341
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|
756 need_measurement = 1; |
|
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757 |
|
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|
758 for(;;) |
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|
759 { |
| 307 | 760 if (need_measurement) |
| 761 { | |
| 320 | 762 need_measurement = 0; |
| 307 | 763 do_measurement(); |
| 347 | 764 continue; |
| 307 | 765 } |
|
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|
766 |
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767 if (need_comms) |
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|
768 { |
|
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untested, add comms timeout code
Matt Johnston <matt@ucc.asn.au>
parents:
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769 need_comms = 0; |
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310
0a64532c1de1
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
309
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770 do_comms(); |
| 347 | 771 continue; |
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310
0a64532c1de1
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
309
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changeset
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772 } |
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0a64532c1de1
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
309
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changeset
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773 |
| 347 | 774 deep_sleep(); |
| 306 | 775 } |
| 318 | 776 |
| 306 | 777 return 0; /* never reached */ |
| 778 } |