Mercurial > templog
annotate main.c @ 81:4a2a82d6302c
try and be a bit more frugal with stack
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Wed, 11 Jul 2012 00:22:31 +0800 |
| parents | 1e2068c5413a |
| children | b9179968a272 |
| rev | line source |
|---|---|
| 0 | 1 #include <stdio.h> |
| 2 #include <string.h> | |
| 13 | 3 #include <stddef.h> |
| 1 | 4 #include <avr/io.h> |
| 5 #include <avr/interrupt.h> | |
| 6 #include <avr/sleep.h> | |
| 7 | 7 #include <util/delay.h> |
| 6 | 8 #include <avr/pgmspace.h> |
| 13 | 9 #include <avr/eeprom.h> |
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10 #include <avr/wdt.h> |
| 59 | 11 #include <util/atomic.h> |
| 0 | 12 #include <util/crc16.h> |
| 13 | |
| 12 | 14 // for DWORD of get_fattime() |
| 3 | 15 #include "integer.h" |
| 12 | 16 |
| 17 #include "simple_ds18b20.h" | |
| 13 | 18 #include "onewire.h" |
| 3 | 19 |
| 0 | 20 // configuration params |
| 21 // - measurement interval | |
| 22 // - transmit interval | |
| 23 // - bluetooth params | |
| 24 // - number of sensors (and range?) | |
| 25 | |
| 80 | 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 |
| 13 | 35 |
| 10 | 36 #define BAUD 19200 |
| 7 | 37 #define UBRR ((F_CPU)/8/(BAUD)-1) |
| 38 | |
| 39 #define PORT_LED PORTC | |
| 40 #define DDR_LED DDRC | |
| 41 #define PIN_LED PC4 | |
| 1 | 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 |
| 80 | 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 | |
| 6 | 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 |
| 33 | 57 // #define HAVE_UART_ECHO |
| 58 | |
| 80 | 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 |
| 59 | 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 | |
| 17 | 71 static uint16_t n_measurements; |
| 59 | 72 |
| 80 | 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; |
| 0 | 81 |
| 59 | 82 static uint32_t last_comms_clock; |
| 83 | |
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84 // boolean flags |
| 17 | 85 static uint8_t need_measurement; |
| 86 static uint8_t need_comms; | |
| 40 | 87 static uint8_t uart_enabled; |
| 80 | 88 static uint8_t stay_awake; |
| 1 | 89 |
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90 // counts down from WAKE_SECS to 0, goes to deep sleep when hits 0 |
| 17 | 91 static uint8_t comms_timeout; |
| 1 | 92 |
| 17 | 93 static uint8_t readpos; |
| 0 | 94 static char readbuf[30]; |
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95 static uint8_t have_cmd; |
| 0 | 96 |
| 80 | 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 |
| 13 | 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 |
| 13 | 126 uint16_t magic; |
| 80 | 127 uint16_t measure_wake; |
| 128 uint16_t comms_wake; | |
| 129 uint8_t wake_secs; | |
| 13 | 130 }; |
| 131 | |
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132 static void deep_sleep(); |
| 1 | 133 |
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134 // Very first setup |
| 18 | 135 static void |
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136 setup_chip() |
| 18 | 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 |
| 19 | 156 // 3.3v power for bluetooth and SD |
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157 DDR_LED |= _BV(PIN_LED); |
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158 DDR_SHDN |= _BV(PIN_SHDN); |
| 19 | 159 |
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160 // set pullup |
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161 PORTD |= _BV(PD2); |
| 41 | 162 // INT0 setup |
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163 EICRA = (1<<ISC01); // falling edge - data sheet says it won't work? |
| 41 | 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(); |
| 18 | 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 { |
| 44 | 185 PORT_SHDN |= _BV(PIN_SHDN); |
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186 } |
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187 } |
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188 |
| 80 | 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 } |
| 18 | 219 |
| 0 | 220 static void |
| 7 | 221 uart_on() |
| 0 | 222 { |
| 8 | 223 // Power reduction register |
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224 PRR &= ~_BV(PRUSART0); |
| 8 | 225 |
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226 // All of this needs to be done each time after turning off the PRR |
| 0 | 227 // baud rate |
| 7 | 228 UBRR0H = (unsigned char)(UBRR >> 8); |
| 229 UBRR0L = (unsigned char)UBRR; | |
| 230 // set 2x clock, improves accuracy of UBRR | |
| 231 UCSR0A |= _BV(U2X0); | |
| 6 | 232 UCSR0B = _BV(RXCIE0) | _BV(RXEN0) | _BV(TXEN0); |
| 0 | 233 //8N1 |
| 7 | 234 UCSR0C = _BV(UCSZ01) | _BV(UCSZ00); |
| 41 | 235 uart_enabled = 1; |
| 6 | 236 } |
| 237 | |
| 238 static void | |
| 239 uart_off() | |
| 240 { | |
| 241 // Turn of interrupts and disable tx/rx | |
| 242 UCSR0B = 0; | |
| 41 | 243 uart_enabled = 0; |
| 6 | 244 |
| 245 // Power reduction register | |
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246 PRR |= _BV(PRUSART0); |
| 0 | 247 } |
| 248 | |
| 10 | 249 int |
| 0 | 250 uart_putchar(char c, FILE *stream) |
| 251 { | |
| 41 | 252 if (!uart_enabled) |
| 253 { | |
| 254 return EOF; | |
| 255 } | |
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256 // XXX could perhaps sleep in the loop for power. |
| 8 | 257 if (c == '\n') |
| 258 { | |
| 10 | 259 loop_until_bit_is_set(UCSR0A, UDRE0); |
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260 UDR0 = '\r'; |
| 8 | 261 } |
| 2 | 262 loop_until_bit_is_set(UCSR0A, UDRE0); |
| 263 UDR0 = c; | |
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264 if (stream == crc_stdout) |
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265 { |
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266 crc_out = _crc_ccitt_update(crc_out, c); |
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267 } |
| 10 | 268 if (c == '\r') |
| 269 { | |
| 270 loop_until_bit_is_set(UCSR0A, UDRE0); | |
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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 } |
| 10 | 276 } |
| 40 | 277 return (unsigned char)c; |
| 0 | 278 } |
| 279 | |
| 280 static void | |
| 281 cmd_fetch() | |
| 282 { | |
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283 crc_out = 0; |
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284 |
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285 fprintf_P(crc_stdout, PSTR("START\n")); |
| 59 | 286 { |
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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); |
| 59 | 293 } |
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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()); |
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299 fprintf_P(crc_stdout, PSTR("sensors=%hhu\n"), n_sensors); |
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300 for (uint8_t s = 0; s < n_sensors; s++) |
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301 { |
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302 fprintf_P(crc_stdout, PSTR("sensor_id%hhu="), s); |
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303 printhex(sensor_id[s], ID_LEN, crc_stdout); |
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304 fputc('\n', crc_stdout); |
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305 } |
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306 fprintf_P(crc_stdout, PSTR("measurements=%hu\n"), n_measurements); |
| 14 | 307 for (uint16_t n = 0; n < n_measurements; n++) |
| 0 | 308 { |
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309 fprintf_P(crc_stdout, PSTR("meas%hu="), n); |
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310 for (uint8_t s = 0; s < n_sensors; s++) |
| 13 | 311 { |
| 80 | 312 fprintf_P(crc_stdout, PSTR(" %04hx"), get_measurement(s, n)); |
| 13 | 313 } |
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314 fputc('\n', crc_stdout); |
| 0 | 315 } |
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316 fprintf_P(crc_stdout, PSTR("END\n")); |
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317 fprintf_P(stdout, PSTR("CRC=%hu\n"), crc_out); |
| 0 | 318 } |
| 319 | |
| 320 static void | |
| 321 cmd_clear() | |
| 322 { | |
| 7 | 323 n_measurements = 0; |
| 32 | 324 printf_P(PSTR("cleared\n")); |
| 0 | 325 } |
| 326 | |
| 327 static void | |
| 328 cmd_btoff() | |
| 329 { | |
| 59 | 330 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
| 331 { | |
| 332 comms_count = 0; | |
| 333 } | |
| 80 | 334 printf_P(PSTR("off:%hu\n"), comms_wake); |
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335 _delay_ms(100); |
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336 comms_timeout = 0; |
| 0 | 337 } |
| 338 | |
| 339 static void | |
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340 cmd_reset() |
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341 { |
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342 printf_P(PSTR("reset\n")); |
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343 _delay_ms(100); |
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344 cli(); // disable interrupts |
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345 wdt_enable(WDTO_15MS); // enable watchdog |
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346 while(1); // wait for watchdog to reset processor |
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347 } |
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348 |
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349 static void |
| 12 | 350 cmd_measure() |
| 351 { | |
| 33 | 352 printf_P(PSTR("measuring\n")); |
| 12 | 353 need_measurement = 1; |
| 354 } | |
| 355 | |
| 356 static void | |
| 357 cmd_sensors() | |
| 358 { | |
| 359 uint8_t ret = simple_ds18b20_start_meas(NULL); | |
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360 printf_P(PSTR("All sensors, ret %hhu, waiting...\n"), ret); |
| 14 | 361 long_delay(DS18B20_TCONV_12BIT); |
| 12 | 362 simple_ds18b20_read_all(); |
| 363 } | |
| 364 | |
| 13 | 365 static void |
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366 init_sensors() |
| 13 | 367 { |
| 41 | 368 uint8_t id[OW_ROMCODE_SIZE]; |
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369 printf_P(PSTR("init sensors\n")); |
| 13 | 370 ow_reset(); |
| 41 | 371 for( uint8_t diff = OW_SEARCH_FIRST; diff != OW_LAST_DEVICE; ) |
| 372 { | |
| 373 diff = ow_rom_search( diff, &id[0] ); | |
| 374 if( diff == OW_PRESENCE_ERR ) { | |
| 375 printf_P( PSTR("No Sensor found\r") ); | |
| 376 return; | |
| 377 } | |
| 378 | |
| 379 if( diff == OW_DATA_ERR ) { | |
| 380 printf_P( PSTR("Bus Error\r") ); | |
| 381 return; | |
| 382 } | |
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383 |
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384 if (n_sensors < MAX_SENSORS) |
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385 { |
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386 memcpy(sensor_id[n_sensors], id, ID_LEN); |
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387 printf_P(PSTR("Added sensor %hhu : "), n_sensors); |
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388 printhex(id, ID_LEN, stdout); |
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389 putchar('\n'); |
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390 n_sensors++; |
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391 } |
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392 else |
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393 { |
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394 printf_P(PSTR("Too many sensors\n")); |
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395 } |
| 13 | 396 } |
| 80 | 397 |
| 398 max_measurements = TOTAL_MEASUREMENTS / n_sensors; | |
| 399 } | |
| 400 | |
| 401 static void | |
| 402 load_params() | |
| 403 { | |
| 404 uint16_t magic; | |
| 405 eeprom_read(magic, magic); | |
| 406 if (magic == EXPECT_MAGIC) | |
| 407 { | |
| 408 eeprom_read(measure_wake, measure_wake); | |
| 409 eeprom_read(comms_wake, comms_wake); | |
| 410 eeprom_read(wake_secs, wake_secs); | |
| 411 } | |
| 412 } | |
| 413 | |
| 414 static void | |
| 415 cmd_get_params() | |
| 416 { | |
|
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417 printf_P(PSTR("measure %hu\n"), measure_wake); |
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418 printf_P(PSTR("comms %hu\n"), comms_wake); |
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419 printf_P(PSTR("wake %hhu\n"), wake_secs); |
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420 printf_P(PSTR("tick %d\n"), TICK); |
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421 printf_P(PSTR("sensors %hhu (%hhu)\n"), |
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422 n_sensors, MAX_SENSORS); |
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423 printf_P(PSTR("meas %hu (%hu)\n"), |
| 80 | 424 max_measurements, TOTAL_MEASUREMENTS); |
| 13 | 425 } |
| 426 | |
| 427 static void | |
| 80 | 428 cmd_set_params(const char *params) |
| 13 | 429 { |
| 80 | 430 uint16_t new_measure_wake; |
| 431 uint16_t new_comms_wake; | |
| 432 uint8_t new_wake_secs; | |
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433 int ret = sscanf_P(params, PSTR("%hu %hu %hhu"), |
| 80 | 434 &new_measure_wake, &new_comms_wake, &new_wake_secs); |
| 435 | |
| 436 if (ret != 3) | |
| 13 | 437 { |
| 80 | 438 printf_P(PSTR("Bad values\n")); |
| 439 } | |
| 440 else | |
| 441 { | |
| 14 | 442 cli(); |
| 80 | 443 eeprom_write(new_measure_wake, measure_wake); |
| 444 eeprom_write(new_comms_wake, comms_wake); | |
| 445 eeprom_write(new_wake_secs, wake_secs); | |
| 446 uint16_t magic = EXPECT_MAGIC; | |
| 14 | 447 eeprom_write(magic, magic); |
| 448 sei(); | |
| 80 | 449 printf_P(PSTR("set_params for next boot\n")); |
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450 printf_P(PSTR("measure %hu comms %hu wake %hhu\n"), |
| 80 | 451 new_measure_wake, new_comms_wake, new_wake_secs); |
| 13 | 452 } |
| 80 | 453 } |
| 454 | |
| 455 static void | |
| 456 cmd_awake() | |
| 457 { | |
| 458 stay_awake = 1; | |
| 459 printf_P(PSTR("awake\n")); | |
| 13 | 460 } |
| 461 | |
| 12 | 462 static void |
| 0 | 463 read_handler() |
| 464 { | |
| 6 | 465 if (strcmp_P(readbuf, PSTR("fetch")) == 0) |
| 0 | 466 { |
| 467 cmd_fetch(); | |
| 468 } | |
| 6 | 469 else if (strcmp_P(readbuf, PSTR("clear")) == 0) |
| 0 | 470 { |
| 471 cmd_clear(); | |
| 472 } | |
| 6 | 473 else if (strcmp_P(readbuf, PSTR("btoff")) == 0) |
| 0 | 474 { |
| 475 cmd_btoff(); | |
| 476 } | |
| 12 | 477 else if (strcmp_P(readbuf, PSTR("measure")) == 0) |
| 478 { | |
| 479 cmd_measure(); | |
| 480 } | |
| 481 else if (strcmp_P(readbuf, PSTR("sensors")) == 0) | |
| 482 { | |
| 483 cmd_sensors(); | |
| 484 } | |
| 80 | 485 else if (strcmp_P(readbuf, PSTR("get_params")) == 0) |
| 486 { | |
| 487 cmd_get_params(); | |
| 488 } | |
| 489 else if (strncmp_P(readbuf, PSTR("set_params "), | |
| 490 strlen("set_params ") == 0)) | |
| 491 { | |
| 492 cmd_set_params(&readbuf[strlen("set_params ")]); | |
| 493 } | |
| 494 else if (strcmp_P(readbuf, PSTR("awake")) == 0) | |
| 495 { | |
| 496 cmd_awake(); | |
| 497 } | |
|
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498 else if (strcmp_P(readbuf, PSTR("reset")) == 0) |
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|
499 { |
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|
500 cmd_reset(); |
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|
501 } |
| 0 | 502 else |
| 503 { | |
| 6 | 504 printf_P(PSTR("Bad command\n")); |
| 0 | 505 } |
| 506 } | |
| 507 | |
|
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diff
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|
508 ISR(INT0_vect) |
| 18 | 509 { |
| 41 | 510 need_comms = 1; |
| 80 | 511 comms_timeout = wake_secs; |
|
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512 blink(); |
|
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|
513 _delay_ms(100); |
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|
514 blink(); |
| 18 | 515 } |
| 516 | |
| 517 | |
| 2 | 518 ISR(USART_RX_vect) |
| 0 | 519 { |
| 2 | 520 char c = UDR0; |
| 33 | 521 #ifdef HAVE_UART_ECHO |
| 12 | 522 uart_putchar(c, NULL); |
| 33 | 523 #endif |
|
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524 if (c == '\r' || c == '\n') |
| 0 | 525 { |
|
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526 if (readpos > 0) |
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|
527 { |
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|
528 readbuf[readpos] = '\0'; |
|
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529 have_cmd = 1; |
|
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530 readpos = 0; |
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|
531 } |
| 0 | 532 } |
| 533 else | |
| 534 { | |
| 535 readbuf[readpos] = c; | |
| 536 readpos++; | |
| 537 if (readpos >= sizeof(readbuf)) | |
| 538 { | |
| 539 readpos = 0; | |
| 540 } | |
| 541 } | |
| 542 } | |
| 543 | |
| 2 | 544 ISR(TIMER2_COMPA_vect) |
| 1 | 545 { |
| 14 | 546 TCNT2 = 0; |
| 80 | 547 measure_count += TICK; |
| 548 comms_count += TICK; | |
|
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549 |
| 80 | 550 clock_epoch += TICK; |
| 17 | 551 |
|
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552 if (comms_timeout != 0) |
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553 { |
| 80 | 554 comms_timeout -= TICK; |
|
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555 } |
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|
556 |
| 80 | 557 if (measure_count >= measure_wake) |
| 1 | 558 { |
|
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559 measure_count = 0; |
| 1 | 560 need_measurement = 1; |
| 561 } | |
|
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562 |
| 80 | 563 if (comms_count >= comms_wake) |
| 41 | 564 { |
| 565 comms_count = 0; | |
| 566 need_comms = 1; | |
| 567 } | |
| 1 | 568 } |
| 569 | |
| 3 | 570 DWORD get_fattime (void) |
| 571 { | |
| 572 return 0; | |
| 573 } | |
| 574 | |
| 1 | 575 static void |
| 576 deep_sleep() | |
| 577 { | |
| 578 // p119 of manual | |
| 2 | 579 OCR2A = SLEEP_COMPARE; |
| 580 loop_until_bit_is_clear(ASSR, OCR2AUB); | |
| 1 | 581 |
| 582 set_sleep_mode(SLEEP_MODE_PWR_SAVE); | |
| 583 sleep_mode(); | |
| 584 } | |
| 585 | |
| 586 static void | |
|
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587 idle_sleep() |
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|
588 { |
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589 set_sleep_mode(SLEEP_MODE_IDLE); |
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590 sleep_mode(); |
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591 } |
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592 |
| 59 | 593 static uint16_t |
| 594 adc_vcc() | |
|
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|
595 { |
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596 PRR &= ~_BV(PRADC); |
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597 |
| 62 | 598 // /16 prescaler |
|
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599 ADCSRA = _BV(ADEN) | _BV(ADPS2); |
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|
600 |
|
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|
601 // set to measure 1.1 reference |
| 58 | 602 ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1); |
| 60 | 603 // average a number of samples |
| 604 uint16_t sum = 0; | |
| 605 uint8_t num = 0; | |
| 606 for (uint8_t n = 0; n < 20; n++) | |
| 59 | 607 { |
| 608 ADCSRA |= _BV(ADSC); | |
| 609 loop_until_bit_is_clear(ADCSRA, ADSC); | |
|
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|
610 |
| 60 | 611 uint8_t low_11 = ADCL; |
| 612 uint8_t high_11 = ADCH; | |
| 613 uint16_t val = low_11 + (high_11 << 8); | |
| 6 | 614 |
| 60 | 615 if (n >= 4) |
| 616 { | |
| 617 sum += val; | |
| 618 num++; | |
| 619 } | |
| 620 } | |
| 621 ADCSRA = 0; | |
| 622 PRR |= _BV(PRADC); | |
| 6 | 623 |
| 80 | 624 //float res_volts = 1.1 * 1024 * num / sum; |
| 625 //return 1000 * res_volts; | |
| 626 return ((uint32_t)1100*1024*num) / sum; | |
| 6 | 627 } |
| 628 | |
|
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|
629 static void |
| 1 | 630 do_measurement() |
| 631 { | |
|
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|
632 blink(); |
|
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|
633 |
|
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|
634 simple_ds18b20_start_meas(NULL); |
| 59 | 635 // sleep rather than using a long delay |
| 636 deep_sleep(); | |
| 637 //_delay_ms(DS18B20_TCONV_12BIT); | |
| 13 | 638 |
| 80 | 639 if (n_measurements == max_measurements) |
| 13 | 640 { |
| 641 n_measurements = 0; | |
| 642 } | |
| 6 | 643 |
| 80 | 644 for (uint8_t s = 0; s < n_sensors; s++) |
| 13 | 645 { |
|
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|
646 uint16_t reading; |
| 80 | 647 uint8_t ret = simple_ds18b20_read_raw(sensor_id[s], &reading); |
| 648 if (ret != DS18X20_OK) | |
| 13 | 649 { |
| 80 | 650 reading = VALUE_BROKEN; |
| 13 | 651 } |
| 80 | 652 set_measurement(s, n_measurements, reading); |
| 13 | 653 } |
|
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|
654 |
| 59 | 655 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
|
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|
656 { |
| 59 | 657 if (n_measurements == 0) |
| 658 { | |
| 659 first_measurement_clock = clock_epoch; | |
| 660 } | |
| 661 last_measurement_clock = clock_epoch; | |
|
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|
662 } |
|
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|
663 |
| 14 | 664 n_measurements++; |
| 12 | 665 //do_adc_335(); |
| 1 | 666 } |
| 667 | |
|
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|
668 static void |
|
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|
669 do_comms() |
|
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|
670 { |
| 41 | 671 // turn on bluetooth |
| 59 | 672 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
| 673 { | |
| 674 last_comms_clock = clock_epoch; | |
| 675 } | |
|
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|
676 set_aux_power(1); |
| 7 | 677 uart_on(); |
| 41 | 678 |
| 679 // write sd card here? same 3.3v regulator... | |
| 680 | |
| 80 | 681 for (comms_timeout = wake_secs; |
| 682 comms_timeout > 0 || stay_awake; | |
| 683 ) | |
| 41 | 684 { |
| 6 | 685 if (need_measurement) |
| 686 { | |
| 14 | 687 need_measurement = 0; |
| 6 | 688 do_measurement(); |
| 44 | 689 continue; |
| 6 | 690 } |
| 691 | |
|
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|
692 if (have_cmd) |
|
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diff
changeset
|
693 { |
|
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changeset
|
694 have_cmd = 0; |
|
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Matt Johnston <matt@ucc.asn.au>
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changeset
|
695 read_handler(); |
| 44 | 696 continue; |
|
27
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diff
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|
697 } |
|
dbbd503119ba
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diff
changeset
|
698 |
|
16
5075d8c428bd
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Matt Johnston <matt@ucc.asn.au>
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changeset
|
699 // wait for commands from the master |
| 41 | 700 idle_sleep(); |
| 701 } | |
|
4
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changeset
|
702 |
| 6 | 703 uart_off(); |
|
46
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Use the PRR etc, set value to proper ones
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
704 // in case bluetooth takes time to flush |
|
9ccd965d938a
Use the PRR etc, set value to proper ones
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
705 _delay_ms(100); |
|
16
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diff
changeset
|
706 set_aux_power(0); |
|
4
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diff
changeset
|
707 } |
|
54d369e3d689
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diff
changeset
|
708 |
| 7 | 709 static void |
| 710 blink() | |
| 711 { | |
| 712 PORT_LED &= ~_BV(PIN_LED); | |
| 9 | 713 _delay_ms(1); |
| 7 | 714 PORT_LED |= _BV(PIN_LED); |
| 715 } | |
| 716 | |
| 717 static void | |
| 718 long_delay(int ms) | |
| 719 { | |
| 720 int iter = ms / 100; | |
| 721 | |
| 722 for (int i = 0; i < iter; i++) | |
| 723 { | |
| 724 _delay_ms(100); | |
| 725 } | |
| 726 } | |
| 727 | |
| 8 | 728 ISR(BADISR_vect) |
| 729 { | |
| 14 | 730 //uart_on(); |
| 8 | 731 printf_P(PSTR("Bad interrupt\n")); |
| 732 } | |
| 733 | |
| 0 | 734 int main(void) |
| 735 { | |
|
16
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Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
736 setup_chip(); |
|
5075d8c428bd
untested, add comms timeout code
Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
737 blink(); |
| 9 | 738 |
|
16
5075d8c428bd
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Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
739 set_aux_power(0); |
| 7 | 740 |
| 6 | 741 stdout = &mystdout; |
| 7 | 742 uart_on(); |
| 743 | |
|
16
5075d8c428bd
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Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
744 printf(PSTR("Started.\n")); |
| 13 | 745 |
| 80 | 746 load_params(); |
| 13 | 747 |
|
76
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don't store sensors in eeprom, scan at startup instead
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75
diff
changeset
|
748 init_sensors(); |
|
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diff
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|
749 |
| 8 | 750 uart_off(); |
| 0 | 751 |
| 6 | 752 // turn off everything except timer2 |
|
46
9ccd965d938a
Use the PRR etc, set value to proper ones
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44
diff
changeset
|
753 PRR = _BV(PRTWI) | _BV(PRTIM0) | _BV(PRTIM1) | _BV(PRSPI) | _BV(PRUSART0) | _BV(PRADC); |
| 8 | 754 |
| 755 // for testing | |
| 756 uart_on(); | |
| 757 | |
|
16
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Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
758 setup_tick_counter(); |
|
5075d8c428bd
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Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
759 |
| 12 | 760 sei(); |
| 8 | 761 |
|
25
2943f62c8e62
- Make the python work on openwrt
Matt Johnston <matt@ucc.asn.au>
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24
diff
changeset
|
762 need_comms = 1; |
|
36
a670a67ba489
- decrease measurement interval, measure at start
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33
diff
changeset
|
763 need_measurement = 1; |
|
25
2943f62c8e62
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diff
changeset
|
764 |
|
16
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Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
765 for(;;) |
|
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Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
766 { |
| 1 | 767 if (need_measurement) |
| 768 { | |
| 14 | 769 need_measurement = 0; |
| 1 | 770 do_measurement(); |
| 41 | 771 continue; |
| 1 | 772 } |
|
4
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Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
773 |
|
54d369e3d689
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Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
774 if (need_comms) |
|
54d369e3d689
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Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
775 { |
|
16
5075d8c428bd
untested, add comms timeout code
Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
776 need_comms = 0; |
|
4
54d369e3d689
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
777 do_comms(); |
| 41 | 778 continue; |
|
4
54d369e3d689
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parents:
3
diff
changeset
|
779 } |
|
54d369e3d689
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parents:
3
diff
changeset
|
780 |
| 41 | 781 deep_sleep(); |
| 0 | 782 } |
| 12 | 783 |
| 0 | 784 return 0; /* never reached */ |
| 785 } |