Mercurial > templog
annotate main.c @ 111:cdb26addf4f2 tilt
Add bma180 code, untested
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Wed, 19 Sep 2012 22:40:49 +0800 |
| parents | 2ba9065e7c4f |
| children | 5234ccc416e8 b0ec7b783c0b |
| 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 #include "simple_ds18b20.h" |
| 13 | 15 #include "onewire.h" |
| 3 | 16 |
| 0 | 17 // configuration params |
| 18 // - measurement interval | |
| 19 // - transmit interval | |
| 20 // - bluetooth params | |
| 21 // - number of sensors (and range?) | |
| 22 | |
| 80 | 23 // TICK should be 8 or less (8 untested). all timers need |
| 24 // to be a multiple. | |
| 25 | |
| 26 #define TICK 6 | |
| 27 // we have 1024 prescaler, 32768 crystal. | |
| 28 #define SLEEP_COMPARE (32*TICK-1) | |
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29 |
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30 #define VALUE_NOSENSOR 0x07D0 // 125 degrees |
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31 #define VALUE_BROKEN 0x07D1 // 125.0625 |
| 13 | 32 |
| 10 | 33 #define BAUD 19200 |
| 7 | 34 #define UBRR ((F_CPU)/8/(BAUD)-1) |
| 35 | |
| 36 #define PORT_LED PORTC | |
| 37 #define DDR_LED DDRC | |
| 38 #define PIN_LED PC4 | |
| 1 | 39 |
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40 #define PORT_SHDN PORTD |
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41 #define DDR_SHDN DDRD |
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42 #define PIN_SHDN PD7 |
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43 |
| 80 | 44 // total amount of 16bit values available for measurements. |
| 45 // adjust emperically, be sure to allow enough stack space too | |
| 46 #define TOTAL_MEASUREMENTS 840 | |
| 47 | |
| 48 // each sensor slot uses 8 bytes | |
| 49 #define MAX_SENSORS 6 | |
| 6 | 50 |
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51 // fixed at 8, have a shorter name |
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52 #define ID_LEN OW_ROMCODE_SIZE |
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53 |
| 33 | 54 // #define HAVE_UART_ECHO |
| 55 | |
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56 // stores a value of clock_epoch combined with the remainder of TCNT2, |
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57 // for 1/32 second accuracy |
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58 struct epoch_ticks |
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59 { |
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60 uint32_t ticks; |
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61 // remainder |
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62 uint8_t rem; |
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63 }; |
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64 |
| 80 | 65 // eeprom-settable parameters. all timeouts should |
| 66 // be a multiple of TICK (6 seconds probably) | |
| 97 | 67 static uint16_t measure_wake = 138; // not a divisor of comms_wake |
| 80 | 68 static uint16_t comms_wake = 3600; |
| 69 static uint8_t wake_secs = 30; | |
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70 |
| 59 | 71 // ---- Atomic guards required accessing these variables |
| 72 static uint32_t clock_epoch; | |
| 73 static uint16_t comms_count; | |
| 74 static uint16_t measure_count; | |
| 75 // ---- End atomic guards required | |
| 76 | |
| 17 | 77 static uint16_t n_measurements; |
| 59 | 78 |
| 80 | 79 // calculated at startup as TOTAL_MEASUREMENTS/n_sensors |
| 80 static uint16_t max_measurements; | |
| 81 | |
| 82 static uint16_t measurements[TOTAL_MEASUREMENTS]; | |
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83 |
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84 static struct epoch_ticks first_measurement_clock; |
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85 // last_measurement_clock is redundant but checks that we're not missing |
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86 // samples |
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87 static struct epoch_ticks last_measurement_clock; |
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88 static struct epoch_ticks last_comms_clock; |
| 59 | 89 |
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90 // boolean flags |
| 17 | 91 static uint8_t need_measurement; |
| 92 static uint8_t need_comms; | |
| 40 | 93 static uint8_t uart_enabled; |
| 80 | 94 static uint8_t stay_awake; |
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95 static uint8_t button_pressed; |
| 1 | 96 |
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97 // counts down from WAKE_SECS to 0, goes to deep sleep when hits 0 |
| 17 | 98 static uint8_t comms_timeout; |
| 1 | 99 |
| 17 | 100 static uint8_t readpos; |
| 0 | 101 static char readbuf[30]; |
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102 static uint8_t have_cmd; |
| 0 | 103 |
| 80 | 104 static uint8_t n_sensors; |
| 105 static uint8_t sensor_id[MAX_SENSORS][ID_LEN]; | |
| 106 | |
| 107 | |
| 108 int uart_putchar(char c, FILE *stream); | |
| 109 static void long_delay(int ms); | |
| 110 static void blink(); | |
| 111 static uint16_t adc_vcc(); | |
| 112 | |
| 113 static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL, | |
| 114 _FDEV_SETUP_WRITE); | |
| 115 | |
| 116 static uint16_t crc_out; | |
| 117 static FILE _crc_stdout = FDEV_SETUP_STREAM(uart_putchar, NULL, | |
| 118 _FDEV_SETUP_WRITE); | |
| 119 // convenience | |
| 120 static FILE *crc_stdout = &_crc_stdout; | |
| 121 | |
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122 |
| 13 | 123 // thanks to http://projectgus.com/2010/07/eeprom-access-with-arduino/ |
| 124 #define eeprom_read_to(dst_p, eeprom_field, dst_size) eeprom_read_block((dst_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (dst_size)) | |
| 125 #define eeprom_read(dst, eeprom_field) eeprom_read_to((&dst), eeprom_field, sizeof(dst)) | |
| 126 #define eeprom_write_from(src_p, eeprom_field, src_size) eeprom_write_block((src_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (src_size)) | |
| 127 #define eeprom_write(src, eeprom_field) { eeprom_write_from(&src, eeprom_field, sizeof(src)); } | |
| 128 | |
| 129 #define EXPECT_MAGIC 0x67c9 | |
| 130 | |
| 131 struct __attribute__ ((__packed__)) __eeprom_data { | |
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132 // XXX eeprom unused at present |
| 13 | 133 uint16_t magic; |
| 80 | 134 uint16_t measure_wake; |
| 135 uint16_t comms_wake; | |
| 136 uint8_t wake_secs; | |
| 13 | 137 }; |
| 138 | |
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139 static void deep_sleep(); |
| 1 | 140 |
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141 // Very first setup |
| 18 | 142 static void |
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143 setup_chip() |
| 18 | 144 { |
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145 cli(); |
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146 |
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147 // stop watchdog timer (might have been used to cause a reset) |
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148 wdt_reset(); |
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149 MCUSR &= ~_BV(WDRF); |
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150 WDTCSR |= _BV(WDCE) | _BV(WDE); |
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151 WDTCSR = 0; |
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152 |
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153 // Set clock to 2mhz |
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154 CLKPR = _BV(CLKPCE); |
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155 // divide by 4 |
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156 CLKPR = _BV(CLKPS1); |
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157 |
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158 // enable pullups |
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159 PORTB = 0xff; // XXX change when using SPI |
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160 PORTD = 0xff; |
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161 PORTC = 0xff; |
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162 |
| 19 | 163 // 3.3v power for bluetooth and SD |
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164 DDR_LED |= _BV(PIN_LED); |
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165 DDR_SHDN |= _BV(PIN_SHDN); |
| 19 | 166 |
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167 // set pullup |
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168 PORTD |= _BV(PD2); |
| 41 | 169 // INT0 setup |
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170 EICRA = (1<<ISC01); // falling edge - data sheet says it won't work? |
| 41 | 171 EIMSK = _BV(INT0); |
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172 |
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173 // comparator disable |
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174 ACSR = _BV(ACD); |
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175 |
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176 // disable adc pin input buffers |
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177 DIDR0 = 0x3F; // acd0-adc5 |
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178 DIDR1 = (1<<AIN1D)|(1<<AIN0D); // ain0/ain1 |
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179 |
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180 sei(); |
| 18 | 181 } |
| 182 | |
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183 static void |
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184 set_aux_power(uint8_t on) |
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185 { |
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186 if (on) |
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187 { |
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188 PORT_SHDN &= ~_BV(PIN_SHDN); |
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189 } |
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190 else |
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191 { |
| 44 | 192 PORT_SHDN |= _BV(PIN_SHDN); |
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193 } |
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194 } |
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195 |
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196 static void |
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197 get_epoch_ticks(struct epoch_ticks *t) |
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198 { |
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199 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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200 { |
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201 t->ticks = clock_epoch; |
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202 t->rem = TCNT2; |
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203 } |
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204 } |
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205 |
| 80 | 206 static void |
| 207 set_measurement(uint8_t sensor, uint16_t measurement, uint16_t reading) | |
| 208 { | |
| 209 measurements[sensor*max_measurements + measurement] = reading; | |
| 210 } | |
| 211 | |
| 212 static uint16_t | |
| 213 get_measurement(uint8_t sensor, uint16_t measurement) | |
| 214 { | |
| 215 return measurements[sensor*max_measurements + measurement]; | |
| 216 } | |
| 217 | |
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218 static void |
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219 setup_tick_counter() |
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220 { |
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221 // set up counter2. |
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222 // COM21 COM20 Set OC2 on Compare Match (p116) |
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223 // WGM21 Clear counter on compare |
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224 //TCCR2A = _BV(COM2A1) | _BV(COM2A0) | _BV(WGM21); |
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225 // toggle on match |
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226 TCCR2A = _BV(COM2A0); |
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227 // CS22 CS21 CS20 clk/1024 |
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228 TCCR2B = _BV(CS22) | _BV(CS21) | _BV(CS20); |
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229 // set async mode |
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230 ASSR |= _BV(AS2); |
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231 TCNT2 = 0; |
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232 OCR2A = SLEEP_COMPARE; |
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233 // interrupt |
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234 TIMSK2 = _BV(OCIE2A); |
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235 } |
| 18 | 236 |
| 0 | 237 static void |
| 7 | 238 uart_on() |
| 0 | 239 { |
| 8 | 240 // Power reduction register |
|
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241 PRR &= ~_BV(PRUSART0); |
| 8 | 242 |
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243 // All of this needs to be done each time after turning off the PRR |
| 0 | 244 // baud rate |
| 7 | 245 UBRR0H = (unsigned char)(UBRR >> 8); |
| 246 UBRR0L = (unsigned char)UBRR; | |
| 247 // set 2x clock, improves accuracy of UBRR | |
| 248 UCSR0A |= _BV(U2X0); | |
| 6 | 249 UCSR0B = _BV(RXCIE0) | _BV(RXEN0) | _BV(TXEN0); |
| 0 | 250 //8N1 |
| 7 | 251 UCSR0C = _BV(UCSZ01) | _BV(UCSZ00); |
| 41 | 252 uart_enabled = 1; |
| 6 | 253 } |
| 254 | |
| 255 static void | |
| 256 uart_off() | |
| 257 { | |
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258 // Turn off interrupts and disable tx/rx |
| 6 | 259 UCSR0B = 0; |
| 41 | 260 uart_enabled = 0; |
| 6 | 261 |
| 262 // Power reduction register | |
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263 PRR |= _BV(PRUSART0); |
| 0 | 264 } |
| 265 | |
| 10 | 266 int |
| 0 | 267 uart_putchar(char c, FILE *stream) |
| 268 { | |
| 41 | 269 if (!uart_enabled) |
| 270 { | |
| 271 return EOF; | |
| 272 } | |
|
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273 // XXX could perhaps sleep in the loop for power. |
| 8 | 274 if (c == '\n') |
| 275 { | |
| 10 | 276 loop_until_bit_is_set(UCSR0A, UDRE0); |
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277 UDR0 = '\r'; |
| 8 | 278 } |
| 2 | 279 loop_until_bit_is_set(UCSR0A, UDRE0); |
| 280 UDR0 = c; | |
|
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281 if (stream == crc_stdout) |
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282 { |
|
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283 crc_out = _crc_ccitt_update(crc_out, c); |
|
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284 } |
| 10 | 285 if (c == '\r') |
| 286 { | |
| 287 loop_until_bit_is_set(UCSR0A, UDRE0); | |
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288 UDR0 = '\n'; |
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289 if (stream == crc_stdout) |
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290 { |
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291 crc_out = _crc_ccitt_update(crc_out, '\n'); |
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292 } |
| 10 | 293 } |
| 40 | 294 return (unsigned char)c; |
| 0 | 295 } |
| 296 | |
| 297 static void | |
| 298 cmd_fetch() | |
| 299 { | |
|
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300 crc_out = 0; |
|
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301 |
|
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302 fprintf_P(crc_stdout, PSTR("START\n")); |
| 59 | 303 { |
|
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304 struct epoch_ticks now; |
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305 get_epoch_ticks(&now); |
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306 fprintf_P(crc_stdout, PSTR("now=%lu\n"), now.ticks); |
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307 fprintf_P(crc_stdout, PSTR("now_rem=%hhu\n"), now.rem); |
| 59 | 308 } |
|
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309 fprintf_P(crc_stdout, PSTR("time_step=%hu\n"), measure_wake); |
|
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310 fprintf_P(crc_stdout, PSTR("first_time=%lu\n"), first_measurement_clock.ticks); |
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311 fprintf_P(crc_stdout, PSTR("first_time_rem=%hhu\n"), first_measurement_clock.rem); |
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312 fprintf_P(crc_stdout, PSTR("last_time=%lu\n"), last_measurement_clock.ticks); |
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313 fprintf_P(crc_stdout, PSTR("last_time_rem=%hhu\n"), last_measurement_clock.rem); |
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314 fprintf_P(crc_stdout, PSTR("comms_time=%lu\n"), last_comms_clock.ticks); |
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315 fprintf_P(crc_stdout, PSTR("comms_time_rem=%hhu\n"), last_comms_clock.rem); |
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316 fprintf_P(crc_stdout, PSTR("voltage=%hu\n"), adc_vcc()); |
| 87 | 317 fprintf_P(crc_stdout, PSTR("measure=%hu\n"), measure_wake); |
| 318 fprintf_P(crc_stdout, PSTR("comms=%hu\n"), comms_wake); | |
| 319 fprintf_P(crc_stdout, PSTR("wake=%hhu\n"), wake_secs); | |
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320 fprintf_P(crc_stdout, PSTR("tick_secs=%d\n"), TICK); |
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321 fprintf_P(crc_stdout, PSTR("tick_wake=%d\n"), SLEEP_COMPARE); |
| 87 | 322 fprintf_P(crc_stdout, PSTR("maxsens=%hhu\n"), MAX_SENSORS); |
| 323 fprintf_P(crc_stdout, PSTR("totalmeas=%hu\n"), TOTAL_MEASUREMENTS); | |
|
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324 fprintf_P(crc_stdout, PSTR("sensors=%hhu\n"), n_sensors); |
|
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325 for (uint8_t s = 0; s < n_sensors; s++) |
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326 { |
|
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327 fprintf_P(crc_stdout, PSTR("sensor_id%hhu="), s); |
|
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328 printhex(sensor_id[s], ID_LEN, crc_stdout); |
|
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329 fputc('\n', crc_stdout); |
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330 } |
|
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diff
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331 fprintf_P(crc_stdout, PSTR("measurements=%hu\n"), n_measurements); |
| 14 | 332 for (uint16_t n = 0; n < n_measurements; n++) |
| 0 | 333 { |
|
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334 fprintf_P(crc_stdout, PSTR("meas%hu="), n); |
|
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335 for (uint8_t s = 0; s < n_sensors; s++) |
| 13 | 336 { |
| 80 | 337 fprintf_P(crc_stdout, PSTR(" %04hx"), get_measurement(s, n)); |
| 13 | 338 } |
|
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339 fputc('\n', crc_stdout); |
| 0 | 340 } |
|
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341 fprintf_P(crc_stdout, PSTR("END\n")); |
|
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diff
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342 fprintf_P(stdout, PSTR("CRC=%hu\n"), crc_out); |
| 0 | 343 } |
| 344 | |
| 345 static void | |
| 346 cmd_clear() | |
| 347 { | |
| 7 | 348 n_measurements = 0; |
| 32 | 349 printf_P(PSTR("cleared\n")); |
| 0 | 350 } |
| 351 | |
| 352 static void | |
| 353 cmd_btoff() | |
| 354 { | |
|
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355 uint8_t rem; |
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356 uint16_t count_copy; |
| 59 | 357 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
| 358 { | |
|
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359 count_copy = comms_count; |
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360 rem = TCNT2; |
| 59 | 361 } |
|
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362 printf_P(PSTR("next_wake=%hu,"), comms_wake-count_copy); |
|
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363 printf_P(PSTR("rem=%hhu,"), rem); |
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364 printf_P(PSTR("tick_secs=%hhu,"), TICK); |
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365 printf_P(PSTR("tick_wake=%hhu\n"), SLEEP_COMPARE); |
|
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366 _delay_ms(100); |
|
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367 comms_timeout = 0; |
| 0 | 368 } |
| 369 | |
| 370 static void | |
|
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371 cmd_reset() |
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372 { |
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373 printf_P(PSTR("reset\n")); |
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374 _delay_ms(100); |
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375 cli(); // disable interrupts |
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376 wdt_enable(WDTO_15MS); // enable watchdog |
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377 while(1); // wait for watchdog to reset processor |
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378 } |
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|
379 |
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|
380 static void |
| 12 | 381 cmd_measure() |
| 382 { | |
| 33 | 383 printf_P(PSTR("measuring\n")); |
| 12 | 384 need_measurement = 1; |
| 385 } | |
| 386 | |
| 387 static void | |
| 388 cmd_sensors() | |
| 389 { | |
| 390 uint8_t ret = simple_ds18b20_start_meas(NULL); | |
|
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391 printf_P(PSTR("All sensors, ret %hhu, waiting...\n"), ret); |
| 14 | 392 long_delay(DS18B20_TCONV_12BIT); |
| 12 | 393 simple_ds18b20_read_all(); |
| 394 } | |
| 395 | |
| 13 | 396 static void |
|
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|
397 init_sensors() |
| 13 | 398 { |
| 41 | 399 uint8_t id[OW_ROMCODE_SIZE]; |
|
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|
400 printf_P(PSTR("init sensors\n")); |
| 13 | 401 ow_reset(); |
| 41 | 402 for( uint8_t diff = OW_SEARCH_FIRST; diff != OW_LAST_DEVICE; ) |
| 403 { | |
| 404 diff = ow_rom_search( diff, &id[0] ); | |
| 405 if( diff == OW_PRESENCE_ERR ) { | |
| 406 printf_P( PSTR("No Sensor found\r") ); | |
| 407 return; | |
| 408 } | |
| 409 | |
| 410 if( diff == OW_DATA_ERR ) { | |
| 411 printf_P( PSTR("Bus Error\r") ); | |
| 412 return; | |
| 413 } | |
|
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|
414 |
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|
415 if (n_sensors < MAX_SENSORS) |
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|
416 { |
|
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|
417 memcpy(sensor_id[n_sensors], id, ID_LEN); |
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418 printf_P(PSTR("Added sensor %hhu : "), n_sensors); |
|
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419 printhex(id, ID_LEN, stdout); |
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420 putchar('\n'); |
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421 n_sensors++; |
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422 } |
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423 else |
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424 { |
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425 printf_P(PSTR("Too many sensors\n")); |
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426 } |
| 13 | 427 } |
| 80 | 428 |
| 429 max_measurements = TOTAL_MEASUREMENTS / n_sensors; | |
| 430 } | |
| 431 | |
| 432 static void | |
| 433 load_params() | |
| 434 { | |
| 435 uint16_t magic; | |
| 436 eeprom_read(magic, magic); | |
| 437 if (magic == EXPECT_MAGIC) | |
| 438 { | |
| 439 eeprom_read(measure_wake, measure_wake); | |
| 440 eeprom_read(comms_wake, comms_wake); | |
| 441 eeprom_read(wake_secs, wake_secs); | |
| 442 } | |
| 443 } | |
| 444 | |
| 445 static void | |
| 446 cmd_get_params() | |
| 447 { | |
|
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448 printf_P(PSTR("measure %hu\n"), measure_wake); |
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449 printf_P(PSTR("comms %hu\n"), comms_wake); |
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450 printf_P(PSTR("wake %hhu\n"), wake_secs); |
|
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451 printf_P(PSTR("tick %d\n"), TICK); |
|
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452 printf_P(PSTR("sensors %hhu (%hhu)\n"), |
|
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|
453 n_sensors, MAX_SENSORS); |
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454 printf_P(PSTR("meas %hu (%hu)\n"), |
| 80 | 455 max_measurements, TOTAL_MEASUREMENTS); |
| 13 | 456 } |
| 457 | |
| 458 static void | |
| 80 | 459 cmd_set_params(const char *params) |
| 13 | 460 { |
| 80 | 461 uint16_t new_measure_wake; |
| 462 uint16_t new_comms_wake; | |
| 463 uint8_t new_wake_secs; | |
|
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464 int ret = sscanf_P(params, PSTR("%hu %hu %hhu"), |
| 80 | 465 &new_measure_wake, &new_comms_wake, &new_wake_secs); |
| 466 | |
| 467 if (ret != 3) | |
| 13 | 468 { |
| 80 | 469 printf_P(PSTR("Bad values\n")); |
| 470 } | |
| 471 else | |
| 472 { | |
| 14 | 473 cli(); |
| 80 | 474 eeprom_write(new_measure_wake, measure_wake); |
| 475 eeprom_write(new_comms_wake, comms_wake); | |
| 476 eeprom_write(new_wake_secs, wake_secs); | |
| 477 uint16_t magic = EXPECT_MAGIC; | |
| 14 | 478 eeprom_write(magic, magic); |
| 479 sei(); | |
| 80 | 480 printf_P(PSTR("set_params for next boot\n")); |
|
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481 printf_P(PSTR("measure %hu comms %hu wake %hhu\n"), |
| 80 | 482 new_measure_wake, new_comms_wake, new_wake_secs); |
| 13 | 483 } |
| 80 | 484 } |
| 485 | |
| 486 static void | |
| 487 cmd_awake() | |
| 488 { | |
| 489 stay_awake = 1; | |
| 490 printf_P(PSTR("awake\n")); | |
| 13 | 491 } |
| 492 | |
| 12 | 493 static void |
| 0 | 494 read_handler() |
| 495 { | |
| 6 | 496 if (strcmp_P(readbuf, PSTR("fetch")) == 0) |
| 0 | 497 { |
| 498 cmd_fetch(); | |
| 499 } | |
| 6 | 500 else if (strcmp_P(readbuf, PSTR("clear")) == 0) |
| 0 | 501 { |
| 502 cmd_clear(); | |
| 503 } | |
| 6 | 504 else if (strcmp_P(readbuf, PSTR("btoff")) == 0) |
| 0 | 505 { |
| 506 cmd_btoff(); | |
| 507 } | |
| 12 | 508 else if (strcmp_P(readbuf, PSTR("measure")) == 0) |
| 509 { | |
| 510 cmd_measure(); | |
| 511 } | |
| 512 else if (strcmp_P(readbuf, PSTR("sensors")) == 0) | |
| 513 { | |
| 514 cmd_sensors(); | |
| 515 } | |
| 80 | 516 else if (strcmp_P(readbuf, PSTR("get_params")) == 0) |
| 517 { | |
| 518 cmd_get_params(); | |
| 519 } | |
| 83 | 520 else if (strncmp_P(readbuf, PSTR("set_params "), 11) == 0) |
| 80 | 521 { |
| 83 | 522 cmd_set_params(&readbuf[11]); |
| 80 | 523 } |
| 524 else if (strcmp_P(readbuf, PSTR("awake")) == 0) | |
| 525 { | |
| 526 cmd_awake(); | |
| 527 } | |
|
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528 else if (strcmp_P(readbuf, PSTR("reset")) == 0) |
|
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|
529 { |
|
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|
530 cmd_reset(); |
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|
531 } |
| 0 | 532 else |
| 533 { | |
| 83 | 534 printf_P(PSTR("Bad command '%s'\n"), readbuf); |
| 0 | 535 } |
| 536 } | |
| 537 | |
|
20
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|
538 ISR(INT0_vect) |
| 18 | 539 { |
|
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|
540 button_pressed = 1; |
|
24
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|
541 blink(); |
|
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|
542 _delay_ms(100); |
|
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|
543 blink(); |
| 18 | 544 } |
| 545 | |
| 546 | |
| 2 | 547 ISR(USART_RX_vect) |
| 0 | 548 { |
| 2 | 549 char c = UDR0; |
| 33 | 550 #ifdef HAVE_UART_ECHO |
| 12 | 551 uart_putchar(c, NULL); |
| 33 | 552 #endif |
|
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553 if (c == '\r' || c == '\n') |
| 0 | 554 { |
|
22
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|
555 if (readpos > 0) |
|
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|
556 { |
|
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|
557 readbuf[readpos] = '\0'; |
|
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|
558 have_cmd = 1; |
|
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|
559 readpos = 0; |
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|
560 } |
| 0 | 561 } |
| 562 else | |
| 563 { | |
| 564 readbuf[readpos] = c; | |
| 565 readpos++; | |
| 566 if (readpos >= sizeof(readbuf)) | |
| 567 { | |
| 568 readpos = 0; | |
| 569 } | |
| 570 } | |
| 571 } | |
| 572 | |
| 2 | 573 ISR(TIMER2_COMPA_vect) |
| 1 | 574 { |
| 14 | 575 TCNT2 = 0; |
| 80 | 576 measure_count += TICK; |
| 577 comms_count += TICK; | |
|
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|
578 |
| 80 | 579 clock_epoch += TICK; |
| 17 | 580 |
|
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|
581 if (comms_timeout != 0) |
|
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|
582 { |
| 80 | 583 comms_timeout -= TICK; |
|
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diff
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|
584 } |
|
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|
585 |
| 80 | 586 if (measure_count >= measure_wake) |
| 1 | 587 { |
|
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changeset
|
588 measure_count = 0; |
| 1 | 589 need_measurement = 1; |
| 590 } | |
|
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|
591 |
| 80 | 592 if (comms_count >= comms_wake) |
| 41 | 593 { |
| 594 comms_count = 0; | |
| 595 need_comms = 1; | |
| 596 } | |
| 1 | 597 } |
| 598 | |
| 599 static void | |
| 600 deep_sleep() | |
| 601 { | |
| 602 // p119 of manual | |
| 2 | 603 OCR2A = SLEEP_COMPARE; |
| 604 loop_until_bit_is_clear(ASSR, OCR2AUB); | |
| 1 | 605 |
| 606 set_sleep_mode(SLEEP_MODE_PWR_SAVE); | |
| 607 sleep_mode(); | |
| 608 } | |
| 609 | |
| 610 static void | |
|
4
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diff
changeset
|
611 idle_sleep() |
|
54d369e3d689
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diff
changeset
|
612 { |
|
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diff
changeset
|
613 set_sleep_mode(SLEEP_MODE_IDLE); |
|
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diff
changeset
|
614 sleep_mode(); |
|
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diff
changeset
|
615 } |
|
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diff
changeset
|
616 |
| 59 | 617 static uint16_t |
| 618 adc_vcc() | |
|
55
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diff
changeset
|
619 { |
|
8e897a682208
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diff
changeset
|
620 PRR &= ~_BV(PRADC); |
|
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diff
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|
621 |
| 62 | 622 // /16 prescaler |
|
55
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diff
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|
623 ADCSRA = _BV(ADEN) | _BV(ADPS2); |
|
8e897a682208
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diff
changeset
|
624 |
|
8e897a682208
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parents:
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diff
changeset
|
625 // set to measure 1.1 reference |
| 58 | 626 ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1); |
| 60 | 627 // average a number of samples |
| 628 uint16_t sum = 0; | |
| 629 uint8_t num = 0; | |
| 630 for (uint8_t n = 0; n < 20; n++) | |
| 59 | 631 { |
| 632 ADCSRA |= _BV(ADSC); | |
| 633 loop_until_bit_is_clear(ADCSRA, ADSC); | |
|
55
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diff
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|
634 |
| 60 | 635 uint8_t low_11 = ADCL; |
| 636 uint8_t high_11 = ADCH; | |
| 637 uint16_t val = low_11 + (high_11 << 8); | |
| 6 | 638 |
| 60 | 639 if (n >= 4) |
| 640 { | |
| 641 sum += val; | |
| 642 num++; | |
| 643 } | |
| 644 } | |
| 645 ADCSRA = 0; | |
| 646 PRR |= _BV(PRADC); | |
| 6 | 647 |
| 80 | 648 //float res_volts = 1.1 * 1024 * num / sum; |
| 649 //return 1000 * res_volts; | |
| 650 return ((uint32_t)1100*1024*num) / sum; | |
| 6 | 651 } |
| 652 | |
|
4
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diff
changeset
|
653 static void |
| 1 | 654 do_measurement() |
| 655 { | |
|
75
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changeset
|
656 blink(); |
|
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|
657 |
|
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|
658 /* Take the timer here since deep_sleep() below could take 6 seconds */ |
|
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|
659 get_epoch_ticks(&last_measurement_clock); |
|
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|
660 if (n_measurements == 0) |
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|
661 { |
|
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|
662 first_measurement_clock = last_measurement_clock; |
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|
663 } |
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|
664 |
|
55
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changeset
|
665 simple_ds18b20_start_meas(NULL); |
| 59 | 666 // sleep rather than using a long delay |
| 667 deep_sleep(); | |
| 668 //_delay_ms(DS18B20_TCONV_12BIT); | |
| 13 | 669 |
| 80 | 670 if (n_measurements == max_measurements) |
| 13 | 671 { |
| 672 n_measurements = 0; | |
| 673 } | |
| 6 | 674 |
| 80 | 675 for (uint8_t s = 0; s < n_sensors; s++) |
| 13 | 676 { |
|
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diff
changeset
|
677 uint16_t reading; |
| 80 | 678 uint8_t ret = simple_ds18b20_read_raw(sensor_id[s], &reading); |
| 679 if (ret != DS18X20_OK) | |
| 13 | 680 { |
| 80 | 681 reading = VALUE_BROKEN; |
| 13 | 682 } |
| 80 | 683 set_measurement(s, n_measurements, reading); |
| 13 | 684 } |
|
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changeset
|
685 |
| 14 | 686 n_measurements++; |
| 1 | 687 } |
| 688 | |
|
4
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changeset
|
689 static void |
|
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changeset
|
690 do_comms() |
|
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|
691 { |
|
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|
692 get_epoch_ticks(&last_comms_clock); |
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|
693 |
| 41 | 694 // turn on bluetooth |
|
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|
695 set_aux_power(1); |
|
89
51d889ad39a3
main.c : add a delay before turning on uart
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diff
changeset
|
696 // avoid receiving rubbish, perhaps |
|
51d889ad39a3
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diff
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|
697 _delay_ms(50); |
| 7 | 698 uart_on(); |
| 41 | 699 |
| 700 // write sd card here? same 3.3v regulator... | |
| 701 | |
| 80 | 702 for (comms_timeout = wake_secs; |
| 703 comms_timeout > 0 || stay_awake; | |
| 704 ) | |
| 41 | 705 { |
| 6 | 706 if (need_measurement) |
| 707 { | |
| 14 | 708 need_measurement = 0; |
| 6 | 709 do_measurement(); |
| 44 | 710 continue; |
| 6 | 711 } |
| 712 | |
|
27
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diff
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|
713 if (have_cmd) |
|
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diff
changeset
|
714 { |
|
dbbd503119ba
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diff
changeset
|
715 have_cmd = 0; |
|
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|
716 read_handler(); |
| 44 | 717 continue; |
|
27
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718 } |
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719 |
|
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720 // wait for commands from the master |
| 41 | 721 idle_sleep(); |
| 722 } | |
|
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723 |
| 6 | 724 uart_off(); |
|
46
9ccd965d938a
Use the PRR etc, set value to proper ones
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diff
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725 // in case bluetooth takes time to flush |
|
9ccd965d938a
Use the PRR etc, set value to proper ones
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parents:
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726 _delay_ms(100); |
|
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727 set_aux_power(0); |
|
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728 } |
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729 |
| 7 | 730 static void |
| 731 blink() | |
| 732 { | |
| 733 PORT_LED &= ~_BV(PIN_LED); | |
| 9 | 734 _delay_ms(1); |
| 7 | 735 PORT_LED |= _BV(PIN_LED); |
| 736 } | |
| 737 | |
| 738 static void | |
| 739 long_delay(int ms) | |
| 740 { | |
| 741 int iter = ms / 100; | |
| 742 | |
| 743 for (int i = 0; i < iter; i++) | |
| 744 { | |
| 745 _delay_ms(100); | |
| 746 } | |
| 747 } | |
| 748 | |
| 8 | 749 ISR(BADISR_vect) |
| 750 { | |
| 14 | 751 //uart_on(); |
| 8 | 752 printf_P(PSTR("Bad interrupt\n")); |
| 753 } | |
| 754 | |
| 0 | 755 int main(void) |
| 756 { | |
|
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757 setup_chip(); |
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758 blink(); |
| 9 | 759 |
|
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760 set_aux_power(0); |
| 7 | 761 |
| 6 | 762 stdout = &mystdout; |
| 7 | 763 uart_on(); |
| 764 | |
|
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765 printf(PSTR("Started.\n")); |
| 13 | 766 |
| 80 | 767 load_params(); |
| 13 | 768 |
|
76
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don't store sensors in eeprom, scan at startup instead
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diff
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|
769 init_sensors(); |
|
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diff
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770 |
| 8 | 771 uart_off(); |
| 0 | 772 |
| 6 | 773 // turn off everything except timer2 |
|
46
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774 PRR = _BV(PRTWI) | _BV(PRTIM0) | _BV(PRTIM1) | _BV(PRSPI) | _BV(PRUSART0) | _BV(PRADC); |
| 8 | 775 |
|
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|
776 setup_tick_counter(); |
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diff
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|
777 |
| 12 | 778 sei(); |
| 8 | 779 |
|
25
2943f62c8e62
- Make the python work on openwrt
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diff
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|
780 need_comms = 1; |
|
36
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781 need_measurement = 1; |
|
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782 |
|
16
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783 for(;;) |
|
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784 { |
|
90
a1c1c2d475b0
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|
785 if (button_pressed) |
|
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|
786 { |
|
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parents:
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diff
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|
787 // debounce |
|
a1c1c2d475b0
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parents:
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788 _delay_ms(200); |
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a1c1c2d475b0
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parents:
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789 need_comms = 1; |
|
a1c1c2d475b0
print the remainder of timers as well
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790 comms_timeout = wake_secs; |
|
a1c1c2d475b0
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parents:
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diff
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|
791 button_pressed = 0; |
| 41 | 792 continue; |
| 1 | 793 } |
|
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parents:
3
diff
changeset
|
794 |
|
54d369e3d689
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parents:
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diff
changeset
|
795 if (need_comms) |
|
54d369e3d689
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parents:
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796 { |
|
16
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Matt Johnston <matt@ucc.asn.au>
parents:
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diff
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797 need_comms = 0; |
|
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diff
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|
798 do_comms(); |
| 41 | 799 continue; |
|
4
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Fill out more main.c structure
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|
800 } |
|
54d369e3d689
Fill out more main.c structure
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changeset
|
801 |
| 97 | 802 if (need_measurement) |
| 803 { | |
| 804 need_measurement = 0; | |
| 805 do_measurement(); | |
| 806 continue; | |
| 807 } | |
| 808 | |
| 41 | 809 deep_sleep(); |
| 0 | 810 } |
| 12 | 811 |
| 0 | 812 return 0; /* never reached */ |
| 813 } |