Mercurial > templog
annotate main.c @ 112:5234ccc416e8 tilt
split ds18b20 and fixed sensors
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Wed, 19 Sep 2012 23:23:06 +0800 |
| parents | 2ba9065e7c4f |
| children | d69eb9f3274d |
| 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" |
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16 #include "bma180.h" |
| 3 | 17 |
| 0 | 18 // configuration params |
| 19 // - measurement interval | |
| 20 // - transmit interval | |
| 21 // - bluetooth params | |
| 22 // - number of sensors (and range?) | |
| 23 | |
| 80 | 24 // TICK should be 8 or less (8 untested). all timers need |
| 25 // to be a multiple. | |
| 26 | |
| 27 #define TICK 6 | |
| 28 // we have 1024 prescaler, 32768 crystal. | |
| 29 #define SLEEP_COMPARE (32*TICK-1) | |
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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 |
| 13 | 33 |
| 10 | 34 #define BAUD 19200 |
| 7 | 35 #define UBRR ((F_CPU)/8/(BAUD)-1) |
| 36 | |
| 37 #define PORT_LED PORTC | |
| 38 #define DDR_LED DDRC | |
| 39 #define PIN_LED PC4 | |
| 1 | 40 |
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41 #define PORT_SHDN PORTD |
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42 #define DDR_SHDN DDRD |
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43 #define PIN_SHDN PD7 |
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44 |
| 80 | 45 // total amount of 16bit values available for measurements. |
| 46 // adjust emperically, be sure to allow enough stack space too | |
| 47 #define TOTAL_MEASUREMENTS 840 | |
| 48 | |
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49 // number of fixed sensors, should match setup_fixed_sensors() |
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50 #define N_FIXED_SENSORS 4 |
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51 |
| 80 | 52 // each sensor slot uses 8 bytes |
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53 #define MAX_DS18B20 6 |
| 6 | 54 |
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55 // fixed at 8, have a shorter name |
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56 #define ID_LEN OW_ROMCODE_SIZE |
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57 |
| 33 | 58 // #define HAVE_UART_ECHO |
| 59 | |
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60 // stores a value of clock_epoch combined with the remainder of TCNT2, |
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61 // for 1/32 second accuracy |
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62 struct epoch_ticks |
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63 { |
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64 uint32_t ticks; |
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65 // remainder |
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66 uint8_t rem; |
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67 }; |
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68 |
| 80 | 69 // eeprom-settable parameters. all timeouts should |
| 70 // be a multiple of TICK (6 seconds probably) | |
| 97 | 71 static uint16_t measure_wake = 138; // not a divisor of comms_wake |
| 80 | 72 static uint16_t comms_wake = 3600; |
| 73 static uint8_t wake_secs = 30; | |
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74 |
| 59 | 75 // ---- Atomic guards required accessing these variables |
| 76 static uint32_t clock_epoch; | |
| 77 static uint16_t comms_count; | |
| 78 static uint16_t measure_count; | |
| 79 // ---- End atomic guards required | |
| 80 | |
| 17 | 81 static uint16_t n_measurements; |
| 59 | 82 |
| 80 | 83 // calculated at startup as TOTAL_MEASUREMENTS/n_sensors |
| 84 static uint16_t max_measurements; | |
| 85 | |
| 86 static uint16_t measurements[TOTAL_MEASUREMENTS]; | |
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87 |
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88 static struct epoch_ticks first_measurement_clock; |
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89 // last_measurement_clock is redundant but checks that we're not missing |
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90 // samples |
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91 static struct epoch_ticks last_measurement_clock; |
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92 static struct epoch_ticks last_comms_clock; |
| 59 | 93 |
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94 // boolean flags |
| 17 | 95 static uint8_t need_measurement; |
| 96 static uint8_t need_comms; | |
| 40 | 97 static uint8_t uart_enabled; |
| 80 | 98 static uint8_t stay_awake; |
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99 static uint8_t button_pressed; |
| 1 | 100 |
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101 // counts down from WAKE_SECS to 0, goes to deep sleep when hits 0 |
| 17 | 102 static uint8_t comms_timeout; |
| 1 | 103 |
| 17 | 104 static uint8_t readpos; |
| 0 | 105 static char readbuf[30]; |
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106 static uint8_t have_cmd; |
| 0 | 107 |
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108 // number of total sensors. non-ds18b20 sensors go at the end of the list. |
| 80 | 109 static uint8_t n_sensors; |
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110 // number of ds18b20 sensors |
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111 static uint8_t n_ds18b20; |
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112 static uint8_t ds18b20_id[MAX_DS18B20][ID_LEN]; |
| 80 | 113 |
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114 static const char *fixed_sensor_P[N_FIXED_SENSORS]; |
| 80 | 115 |
| 116 int uart_putchar(char c, FILE *stream); | |
| 117 static void long_delay(int ms); | |
| 118 static void blink(); | |
| 119 static uint16_t adc_vcc(); | |
| 120 | |
| 121 static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL, | |
| 122 _FDEV_SETUP_WRITE); | |
| 123 | |
| 124 static uint16_t crc_out; | |
| 125 static FILE _crc_stdout = FDEV_SETUP_STREAM(uart_putchar, NULL, | |
| 126 _FDEV_SETUP_WRITE); | |
| 127 // convenience | |
| 128 static FILE *crc_stdout = &_crc_stdout; | |
| 129 | |
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130 |
| 13 | 131 // thanks to http://projectgus.com/2010/07/eeprom-access-with-arduino/ |
| 132 #define eeprom_read_to(dst_p, eeprom_field, dst_size) eeprom_read_block((dst_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (dst_size)) | |
| 133 #define eeprom_read(dst, eeprom_field) eeprom_read_to((&dst), eeprom_field, sizeof(dst)) | |
| 134 #define eeprom_write_from(src_p, eeprom_field, src_size) eeprom_write_block((src_p), (void *)offsetof(struct __eeprom_data, eeprom_field), (src_size)) | |
| 135 #define eeprom_write(src, eeprom_field) { eeprom_write_from(&src, eeprom_field, sizeof(src)); } | |
| 136 | |
| 137 #define EXPECT_MAGIC 0x67c9 | |
| 138 | |
| 139 struct __attribute__ ((__packed__)) __eeprom_data { | |
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140 // XXX eeprom unused at present |
| 13 | 141 uint16_t magic; |
| 80 | 142 uint16_t measure_wake; |
| 143 uint16_t comms_wake; | |
| 144 uint8_t wake_secs; | |
| 13 | 145 }; |
| 146 | |
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147 static void deep_sleep(); |
| 1 | 148 |
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149 // Very first setup |
| 18 | 150 static void |
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151 setup_chip() |
| 18 | 152 { |
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153 cli(); |
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154 |
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155 // stop watchdog timer (might have been used to cause a reset) |
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156 wdt_reset(); |
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157 MCUSR &= ~_BV(WDRF); |
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158 WDTCSR |= _BV(WDCE) | _BV(WDE); |
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159 WDTCSR = 0; |
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160 |
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161 // Set clock to 2mhz |
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162 CLKPR = _BV(CLKPCE); |
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163 // divide by 4 |
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164 CLKPR = _BV(CLKPS1); |
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165 |
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166 // enable pullups |
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167 PORTB = 0xff; // XXX change when using SPI |
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168 PORTD = 0xff; |
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169 PORTC = 0xff; |
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170 |
| 19 | 171 // 3.3v power for bluetooth and SD |
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172 DDR_LED |= _BV(PIN_LED); |
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173 DDR_SHDN |= _BV(PIN_SHDN); |
| 19 | 174 |
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175 // set pullup |
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176 PORTD |= _BV(PD2); |
| 41 | 177 // INT0 setup |
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178 EICRA = (1<<ISC01); // falling edge - data sheet says it won't work? |
| 41 | 179 EIMSK = _BV(INT0); |
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180 |
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181 // comparator disable |
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182 ACSR = _BV(ACD); |
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183 |
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184 // disable adc pin input buffers |
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185 DIDR0 = 0x3F; // acd0-adc5 |
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186 DIDR1 = (1<<AIN1D)|(1<<AIN0D); // ain0/ain1 |
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187 |
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188 sei(); |
| 18 | 189 } |
| 190 | |
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191 static void |
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192 set_aux_power(uint8_t on) |
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193 { |
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194 if (on) |
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195 { |
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196 PORT_SHDN &= ~_BV(PIN_SHDN); |
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197 } |
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198 else |
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199 { |
| 44 | 200 PORT_SHDN |= _BV(PIN_SHDN); |
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201 } |
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202 } |
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203 |
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204 static void |
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205 get_epoch_ticks(struct epoch_ticks *t) |
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206 { |
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207 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
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208 { |
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209 t->ticks = clock_epoch; |
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210 t->rem = TCNT2; |
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211 } |
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212 } |
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213 |
| 80 | 214 static void |
| 215 set_measurement(uint8_t sensor, uint16_t measurement, uint16_t reading) | |
| 216 { | |
| 217 measurements[sensor*max_measurements + measurement] = reading; | |
| 218 } | |
| 219 | |
| 220 static uint16_t | |
| 221 get_measurement(uint8_t sensor, uint16_t measurement) | |
| 222 { | |
| 223 return measurements[sensor*max_measurements + measurement]; | |
| 224 } | |
| 225 | |
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226 static void |
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227 setup_tick_counter() |
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228 { |
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229 // set up counter2. |
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230 // COM21 COM20 Set OC2 on Compare Match (p116) |
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231 // WGM21 Clear counter on compare |
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232 //TCCR2A = _BV(COM2A1) | _BV(COM2A0) | _BV(WGM21); |
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233 // toggle on match |
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234 TCCR2A = _BV(COM2A0); |
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235 // CS22 CS21 CS20 clk/1024 |
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236 TCCR2B = _BV(CS22) | _BV(CS21) | _BV(CS20); |
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237 // set async mode |
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238 ASSR |= _BV(AS2); |
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239 TCNT2 = 0; |
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240 OCR2A = SLEEP_COMPARE; |
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241 // interrupt |
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242 TIMSK2 = _BV(OCIE2A); |
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243 } |
| 18 | 244 |
| 0 | 245 static void |
| 7 | 246 uart_on() |
| 0 | 247 { |
| 8 | 248 // Power reduction register |
|
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249 PRR &= ~_BV(PRUSART0); |
| 8 | 250 |
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251 // All of this needs to be done each time after turning off the PRR |
| 0 | 252 // baud rate |
| 7 | 253 UBRR0H = (unsigned char)(UBRR >> 8); |
| 254 UBRR0L = (unsigned char)UBRR; | |
| 255 // set 2x clock, improves accuracy of UBRR | |
| 256 UCSR0A |= _BV(U2X0); | |
| 6 | 257 UCSR0B = _BV(RXCIE0) | _BV(RXEN0) | _BV(TXEN0); |
| 0 | 258 //8N1 |
| 7 | 259 UCSR0C = _BV(UCSZ01) | _BV(UCSZ00); |
| 41 | 260 uart_enabled = 1; |
| 6 | 261 } |
| 262 | |
| 263 static void | |
| 264 uart_off() | |
| 265 { | |
|
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266 // Turn off interrupts and disable tx/rx |
| 6 | 267 UCSR0B = 0; |
| 41 | 268 uart_enabled = 0; |
| 6 | 269 |
| 270 // Power reduction register | |
|
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271 PRR |= _BV(PRUSART0); |
| 0 | 272 } |
| 273 | |
| 10 | 274 int |
| 0 | 275 uart_putchar(char c, FILE *stream) |
| 276 { | |
| 41 | 277 if (!uart_enabled) |
| 278 { | |
| 279 return EOF; | |
| 280 } | |
|
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281 // XXX could perhaps sleep in the loop for power. |
| 8 | 282 if (c == '\n') |
| 283 { | |
| 10 | 284 loop_until_bit_is_set(UCSR0A, UDRE0); |
|
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285 UDR0 = '\r'; |
| 8 | 286 } |
| 2 | 287 loop_until_bit_is_set(UCSR0A, UDRE0); |
| 288 UDR0 = c; | |
|
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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, c); |
|
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292 } |
| 10 | 293 if (c == '\r') |
| 294 { | |
| 295 loop_until_bit_is_set(UCSR0A, UDRE0); | |
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296 UDR0 = '\n'; |
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297 if (stream == crc_stdout) |
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298 { |
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299 crc_out = _crc_ccitt_update(crc_out, '\n'); |
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300 } |
| 10 | 301 } |
| 40 | 302 return (unsigned char)c; |
| 0 | 303 } |
| 304 | |
| 305 static void | |
| 306 cmd_fetch() | |
| 307 { | |
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308 crc_out = 0; |
|
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309 |
|
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310 fprintf_P(crc_stdout, PSTR("START\n")); |
| 59 | 311 { |
|
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312 struct epoch_ticks now; |
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313 get_epoch_ticks(&now); |
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314 fprintf_P(crc_stdout, PSTR("now=%lu\n"), now.ticks); |
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315 fprintf_P(crc_stdout, PSTR("now_rem=%hhu\n"), now.rem); |
| 59 | 316 } |
|
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317 fprintf_P(crc_stdout, PSTR("time_step=%hu\n"), measure_wake); |
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318 fprintf_P(crc_stdout, PSTR("first_time=%lu\n"), first_measurement_clock.ticks); |
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319 fprintf_P(crc_stdout, PSTR("first_time_rem=%hhu\n"), first_measurement_clock.rem); |
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320 fprintf_P(crc_stdout, PSTR("last_time=%lu\n"), last_measurement_clock.ticks); |
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321 fprintf_P(crc_stdout, PSTR("last_time_rem=%hhu\n"), last_measurement_clock.rem); |
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322 fprintf_P(crc_stdout, PSTR("comms_time=%lu\n"), last_comms_clock.ticks); |
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323 fprintf_P(crc_stdout, PSTR("comms_time_rem=%hhu\n"), last_comms_clock.rem); |
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324 fprintf_P(crc_stdout, PSTR("voltage=%hu\n"), adc_vcc()); |
| 87 | 325 fprintf_P(crc_stdout, PSTR("measure=%hu\n"), measure_wake); |
| 326 fprintf_P(crc_stdout, PSTR("comms=%hu\n"), comms_wake); | |
| 327 fprintf_P(crc_stdout, PSTR("wake=%hhu\n"), wake_secs); | |
|
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328 fprintf_P(crc_stdout, PSTR("tick_secs=%d\n"), TICK); |
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329 fprintf_P(crc_stdout, PSTR("tick_wake=%d\n"), SLEEP_COMPARE); |
|
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330 fprintf_P(crc_stdout, PSTR("maxds=%hhu\n"), MAX_DS18B20); |
| 87 | 331 fprintf_P(crc_stdout, PSTR("totalmeas=%hu\n"), TOTAL_MEASUREMENTS); |
|
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332 fprintf_P(crc_stdout, PSTR("sensors=%hhu\n"), n_sensors); |
|
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333 fprintf_P(crc_stdout, PSTR("n_ds=%hhu\n"), n_ds18b20); |
|
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334 for (uint8_t s = 0; s < n_sensors; s++) |
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335 { |
|
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336 fprintf_P(crc_stdout, PSTR("sensor_id%hhu="), s); |
|
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337 const char *type_P; |
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338 if (s < n_ds18b20) |
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339 { |
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340 printhex(ds18b20_id[s], ID_LEN, crc_stdout); |
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341 type_P = PSTR("ds\n"); |
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342 } |
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343 else |
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344 { |
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345 fprintf_P(crc_stdout, fixed_sensor_P[s-n_ds18b20]); |
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346 type_P = PSTR("fixed\n"); |
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347 } |
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348 fputc('\n', crc_stdout); |
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349 fprintf_P(crc_stdout, PSTR("sensor_type%hhu="), s); |
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350 fprintf_P(crc_stdout, type_P); |
|
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351 fputc('\n', crc_stdout); |
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352 } |
|
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353 fprintf_P(crc_stdout, PSTR("measurements=%hu\n"), n_measurements); |
| 14 | 354 for (uint16_t n = 0; n < n_measurements; n++) |
| 0 | 355 { |
|
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356 fprintf_P(crc_stdout, PSTR("meas%hu="), n); |
|
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357 for (uint8_t s = 0; s < n_sensors; s++) |
| 13 | 358 { |
| 80 | 359 fprintf_P(crc_stdout, PSTR(" %04hx"), get_measurement(s, n)); |
| 13 | 360 } |
|
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361 fputc('\n', crc_stdout); |
| 0 | 362 } |
|
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363 fprintf_P(crc_stdout, PSTR("END\n")); |
|
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364 fprintf_P(stdout, PSTR("CRC=%hu\n"), crc_out); |
| 0 | 365 } |
| 366 | |
| 367 static void | |
| 368 cmd_clear() | |
| 369 { | |
| 7 | 370 n_measurements = 0; |
| 32 | 371 printf_P(PSTR("cleared\n")); |
| 0 | 372 } |
| 373 | |
| 374 static void | |
| 375 cmd_btoff() | |
| 376 { | |
|
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377 uint8_t rem; |
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378 uint16_t count_copy; |
| 59 | 379 ATOMIC_BLOCK(ATOMIC_RESTORESTATE) |
| 380 { | |
|
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381 count_copy = comms_count; |
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382 rem = TCNT2; |
| 59 | 383 } |
|
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384 printf_P(PSTR("next_wake=%hu,"), comms_wake-count_copy); |
|
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385 printf_P(PSTR("rem=%hhu,"), rem); |
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386 printf_P(PSTR("tick_secs=%hhu,"), TICK); |
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387 printf_P(PSTR("tick_wake=%hhu\n"), SLEEP_COMPARE); |
|
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388 _delay_ms(100); |
|
16
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389 comms_timeout = 0; |
| 0 | 390 } |
| 391 | |
| 392 static void | |
|
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393 cmd_reset() |
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394 { |
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395 printf_P(PSTR("reset\n")); |
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396 _delay_ms(100); |
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397 cli(); // disable interrupts |
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398 wdt_enable(WDTO_15MS); // enable watchdog |
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399 while(1); // wait for watchdog to reset processor |
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400 } |
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401 |
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402 static void |
| 12 | 403 cmd_measure() |
| 404 { | |
| 33 | 405 printf_P(PSTR("measuring\n")); |
| 12 | 406 need_measurement = 1; |
| 407 } | |
| 408 | |
| 409 static void | |
| 410 cmd_sensors() | |
| 411 { | |
| 412 uint8_t ret = simple_ds18b20_start_meas(NULL); | |
|
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413 printf_P(PSTR("All sensors, ret %hhu, waiting...\n"), ret); |
| 14 | 414 long_delay(DS18B20_TCONV_12BIT); |
| 12 | 415 simple_ds18b20_read_all(); |
| 416 } | |
| 417 | |
| 13 | 418 static void |
|
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419 init_fixed_sensors(void) |
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420 { |
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421 fixed_sensor_P[0] = PSTR("accelx"); |
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422 fixed_sensor_P[1] = PSTR("accely"); |
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423 fixed_sensor_P[2] = PSTR("accelz"); |
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424 fixed_sensor_P[3] = PSTR("acceltemp"); |
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425 |
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426 // default to 1g, 10hz |
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427 bma180_init(0, 0); |
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428 bma180_sleep(); |
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429 |
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430 n_sensors += N_FIXED_SENSORS; |
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431 } |
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432 |
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433 static void |
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434 init_ds_sensors() |
| 13 | 435 { |
| 41 | 436 uint8_t id[OW_ROMCODE_SIZE]; |
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437 printf_P(PSTR("init sensors\n")); |
| 13 | 438 ow_reset(); |
| 41 | 439 for( uint8_t diff = OW_SEARCH_FIRST; diff != OW_LAST_DEVICE; ) |
| 440 { | |
| 441 diff = ow_rom_search( diff, &id[0] ); | |
| 442 if( diff == OW_PRESENCE_ERR ) { | |
| 443 printf_P( PSTR("No Sensor found\r") ); | |
| 444 return; | |
| 445 } | |
| 446 | |
| 447 if( diff == OW_DATA_ERR ) { | |
| 448 printf_P( PSTR("Bus Error\r") ); | |
| 449 return; | |
| 450 } | |
|
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451 |
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452 if (n_ds18b20 < MAX_DS18B20) |
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453 { |
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454 memcpy(ds18b20_id[n_sensors], id, ID_LEN); |
|
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455 printf_P(PSTR("Added sensor %hhu : "), n_sensors); |
|
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456 printhex(id, ID_LEN, stdout); |
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457 putchar('\n'); |
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458 n_sensors++; |
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459 n_ds18b20++; |
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460 } |
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461 else |
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462 { |
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463 printf_P(PSTR("Too many sensors\n")); |
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464 } |
| 13 | 465 } |
| 80 | 466 |
| 467 max_measurements = TOTAL_MEASUREMENTS / n_sensors; | |
| 468 } | |
| 469 | |
| 470 static void | |
| 471 load_params() | |
| 472 { | |
| 473 uint16_t magic; | |
| 474 eeprom_read(magic, magic); | |
| 475 if (magic == EXPECT_MAGIC) | |
| 476 { | |
| 477 eeprom_read(measure_wake, measure_wake); | |
| 478 eeprom_read(comms_wake, comms_wake); | |
| 479 eeprom_read(wake_secs, wake_secs); | |
| 480 } | |
| 481 } | |
| 482 | |
| 483 static void | |
| 484 cmd_get_params() | |
| 485 { | |
|
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486 printf_P(PSTR("measure %hu\n"), measure_wake); |
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487 printf_P(PSTR("comms %hu\n"), comms_wake); |
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488 printf_P(PSTR("wake %hhu\n"), wake_secs); |
|
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|
489 printf_P(PSTR("tick %d\n"), TICK); |
|
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|
490 printf_P(PSTR("sensors %hhu\n"), n_sensors); |
|
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|
491 printf_P(PSTR("ds18b20 %hhu (%hhu)\n"), |
|
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|
492 n_ds18b20, MAX_DS18B20); |
|
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|
493 printf_P(PSTR("meas %hu (%hu)\n"), |
| 80 | 494 max_measurements, TOTAL_MEASUREMENTS); |
| 13 | 495 } |
| 496 | |
| 497 static void | |
| 80 | 498 cmd_set_params(const char *params) |
| 13 | 499 { |
| 80 | 500 uint16_t new_measure_wake; |
| 501 uint16_t new_comms_wake; | |
| 502 uint8_t new_wake_secs; | |
|
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|
503 int ret = sscanf_P(params, PSTR("%hu %hu %hhu"), |
| 80 | 504 &new_measure_wake, &new_comms_wake, &new_wake_secs); |
| 505 | |
| 506 if (ret != 3) | |
| 13 | 507 { |
| 80 | 508 printf_P(PSTR("Bad values\n")); |
| 509 } | |
| 510 else | |
| 511 { | |
| 14 | 512 cli(); |
| 80 | 513 eeprom_write(new_measure_wake, measure_wake); |
| 514 eeprom_write(new_comms_wake, comms_wake); | |
| 515 eeprom_write(new_wake_secs, wake_secs); | |
| 516 uint16_t magic = EXPECT_MAGIC; | |
| 14 | 517 eeprom_write(magic, magic); |
| 518 sei(); | |
| 80 | 519 printf_P(PSTR("set_params for next boot\n")); |
|
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diff
changeset
|
520 printf_P(PSTR("measure %hu comms %hu wake %hhu\n"), |
| 80 | 521 new_measure_wake, new_comms_wake, new_wake_secs); |
| 13 | 522 } |
| 80 | 523 } |
| 524 | |
| 525 static void | |
| 526 cmd_awake() | |
| 527 { | |
| 528 stay_awake = 1; | |
| 529 printf_P(PSTR("awake\n")); | |
| 13 | 530 } |
| 531 | |
| 12 | 532 static void |
| 0 | 533 read_handler() |
| 534 { | |
| 6 | 535 if (strcmp_P(readbuf, PSTR("fetch")) == 0) |
| 0 | 536 { |
| 537 cmd_fetch(); | |
| 538 } | |
| 6 | 539 else if (strcmp_P(readbuf, PSTR("clear")) == 0) |
| 0 | 540 { |
| 541 cmd_clear(); | |
| 542 } | |
| 6 | 543 else if (strcmp_P(readbuf, PSTR("btoff")) == 0) |
| 0 | 544 { |
| 545 cmd_btoff(); | |
| 546 } | |
| 12 | 547 else if (strcmp_P(readbuf, PSTR("measure")) == 0) |
| 548 { | |
| 549 cmd_measure(); | |
| 550 } | |
| 551 else if (strcmp_P(readbuf, PSTR("sensors")) == 0) | |
| 552 { | |
| 553 cmd_sensors(); | |
| 554 } | |
| 80 | 555 else if (strcmp_P(readbuf, PSTR("get_params")) == 0) |
| 556 { | |
| 557 cmd_get_params(); | |
| 558 } | |
| 83 | 559 else if (strncmp_P(readbuf, PSTR("set_params "), 11) == 0) |
| 80 | 560 { |
| 83 | 561 cmd_set_params(&readbuf[11]); |
| 80 | 562 } |
| 563 else if (strcmp_P(readbuf, PSTR("awake")) == 0) | |
| 564 { | |
| 565 cmd_awake(); | |
| 566 } | |
|
54
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diff
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|
567 else if (strcmp_P(readbuf, PSTR("reset")) == 0) |
|
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diff
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|
568 { |
|
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changeset
|
569 cmd_reset(); |
|
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|
570 } |
| 0 | 571 else |
| 572 { | |
| 83 | 573 printf_P(PSTR("Bad command '%s'\n"), readbuf); |
| 0 | 574 } |
| 575 } | |
| 576 | |
|
20
878be5e353a0
Untested - calculate crc in uart_putchar
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19
diff
changeset
|
577 ISR(INT0_vect) |
| 18 | 578 { |
|
90
a1c1c2d475b0
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diff
changeset
|
579 button_pressed = 1; |
|
24
44c5ab5ea879
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|
580 blink(); |
|
44c5ab5ea879
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diff
changeset
|
581 _delay_ms(100); |
|
44c5ab5ea879
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diff
changeset
|
582 blink(); |
| 18 | 583 } |
| 584 | |
| 585 | |
| 2 | 586 ISR(USART_RX_vect) |
| 0 | 587 { |
| 2 | 588 char c = UDR0; |
| 33 | 589 #ifdef HAVE_UART_ECHO |
| 12 | 590 uart_putchar(c, NULL); |
| 33 | 591 #endif |
|
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|
592 if (c == '\r' || c == '\n') |
| 0 | 593 { |
|
22
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changeset
|
594 if (readpos > 0) |
|
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changeset
|
595 { |
|
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changeset
|
596 readbuf[readpos] = '\0'; |
|
27
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diff
changeset
|
597 have_cmd = 1; |
|
22
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|
598 readpos = 0; |
|
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|
599 } |
| 0 | 600 } |
| 601 else | |
| 602 { | |
| 603 readbuf[readpos] = c; | |
| 604 readpos++; | |
| 605 if (readpos >= sizeof(readbuf)) | |
| 606 { | |
| 607 readpos = 0; | |
| 608 } | |
| 609 } | |
| 610 } | |
| 611 | |
| 2 | 612 ISR(TIMER2_COMPA_vect) |
| 1 | 613 { |
| 14 | 614 TCNT2 = 0; |
| 80 | 615 measure_count += TICK; |
| 616 comms_count += TICK; | |
|
16
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diff
changeset
|
617 |
| 80 | 618 clock_epoch += TICK; |
| 17 | 619 |
|
16
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diff
changeset
|
620 if (comms_timeout != 0) |
|
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diff
changeset
|
621 { |
| 80 | 622 comms_timeout -= TICK; |
|
16
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diff
changeset
|
623 } |
|
5075d8c428bd
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Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
624 |
| 80 | 625 if (measure_count >= measure_wake) |
| 1 | 626 { |
|
4
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parents:
3
diff
changeset
|
627 measure_count = 0; |
| 1 | 628 need_measurement = 1; |
| 629 } | |
|
4
54d369e3d689
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diff
changeset
|
630 |
| 80 | 631 if (comms_count >= comms_wake) |
| 41 | 632 { |
| 633 comms_count = 0; | |
| 634 need_comms = 1; | |
| 635 } | |
| 1 | 636 } |
| 637 | |
| 638 static void | |
| 639 deep_sleep() | |
| 640 { | |
| 641 // p119 of manual | |
| 2 | 642 OCR2A = SLEEP_COMPARE; |
| 643 loop_until_bit_is_clear(ASSR, OCR2AUB); | |
| 1 | 644 |
| 645 set_sleep_mode(SLEEP_MODE_PWR_SAVE); | |
| 646 sleep_mode(); | |
| 647 } | |
| 648 | |
| 649 static void | |
|
4
54d369e3d689
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diff
changeset
|
650 idle_sleep() |
|
54d369e3d689
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diff
changeset
|
651 { |
|
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changeset
|
652 set_sleep_mode(SLEEP_MODE_IDLE); |
|
54d369e3d689
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diff
changeset
|
653 sleep_mode(); |
|
54d369e3d689
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changeset
|
654 } |
|
54d369e3d689
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diff
changeset
|
655 |
| 59 | 656 static uint16_t |
| 657 adc_vcc() | |
|
55
8e897a682208
untested code to log voltage and internal temperature
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parents:
54
diff
changeset
|
658 { |
|
8e897a682208
untested code to log voltage and internal temperature
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diff
changeset
|
659 PRR &= ~_BV(PRADC); |
|
8e897a682208
untested code to log voltage and internal temperature
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diff
changeset
|
660 |
| 62 | 661 // /16 prescaler |
|
55
8e897a682208
untested code to log voltage and internal temperature
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diff
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|
662 ADCSRA = _BV(ADEN) | _BV(ADPS2); |
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663 |
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664 // set to measure 1.1 reference |
| 58 | 665 ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1); |
| 60 | 666 // average a number of samples |
| 667 uint16_t sum = 0; | |
| 668 uint8_t num = 0; | |
| 669 for (uint8_t n = 0; n < 20; n++) | |
| 59 | 670 { |
| 671 ADCSRA |= _BV(ADSC); | |
| 672 loop_until_bit_is_clear(ADCSRA, ADSC); | |
|
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673 |
| 60 | 674 uint8_t low_11 = ADCL; |
| 675 uint8_t high_11 = ADCH; | |
| 676 uint16_t val = low_11 + (high_11 << 8); | |
| 6 | 677 |
| 60 | 678 if (n >= 4) |
| 679 { | |
| 680 sum += val; | |
| 681 num++; | |
| 682 } | |
| 683 } | |
| 684 ADCSRA = 0; | |
| 685 PRR |= _BV(PRADC); | |
| 6 | 686 |
| 80 | 687 //float res_volts = 1.1 * 1024 * num / sum; |
| 688 //return 1000 * res_volts; | |
| 689 return ((uint32_t)1100*1024*num) / sum; | |
| 6 | 690 } |
| 691 | |
|
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692 static void |
| 1 | 693 do_measurement() |
| 694 { | |
|
75
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695 blink(); |
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696 |
|
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697 /* Take the timer here since deep_sleep() below could take 6 seconds */ |
|
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698 get_epoch_ticks(&last_measurement_clock); |
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699 if (n_measurements == 0) |
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700 { |
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701 first_measurement_clock = last_measurement_clock; |
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702 } |
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|
703 |
|
55
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704 simple_ds18b20_start_meas(NULL); |
| 59 | 705 // sleep rather than using a long delay |
| 706 deep_sleep(); | |
| 707 //_delay_ms(DS18B20_TCONV_12BIT); | |
| 13 | 708 |
| 80 | 709 if (n_measurements == max_measurements) |
| 13 | 710 { |
| 711 n_measurements = 0; | |
| 712 } | |
| 6 | 713 |
| 80 | 714 for (uint8_t s = 0; s < n_sensors; s++) |
| 13 | 715 { |
|
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report raw ds18b20 values instead
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716 uint16_t reading; |
|
112
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717 uint8_t ret = simple_ds18b20_read_raw(ds18b20_id[s], &reading); |
| 80 | 718 if (ret != DS18X20_OK) |
| 13 | 719 { |
| 80 | 720 reading = VALUE_BROKEN; |
| 13 | 721 } |
| 80 | 722 set_measurement(s, n_measurements, reading); |
| 13 | 723 } |
|
22
885532437100
A bit of work on the server python
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|
724 |
| 14 | 725 n_measurements++; |
| 1 | 726 } |
| 727 | |
|
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|
728 static void |
|
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|
729 do_comms() |
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730 { |
|
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|
731 get_epoch_ticks(&last_comms_clock); |
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732 |
| 41 | 733 // turn on bluetooth |
|
24
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- some fixes for server code
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|
734 set_aux_power(1); |
|
89
51d889ad39a3
main.c : add a delay before turning on uart
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diff
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|
735 // avoid receiving rubbish, perhaps |
|
51d889ad39a3
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diff
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|
736 _delay_ms(50); |
| 7 | 737 uart_on(); |
| 41 | 738 |
| 739 // write sd card here? same 3.3v regulator... | |
| 740 | |
| 80 | 741 for (comms_timeout = wake_secs; |
| 742 comms_timeout > 0 || stay_awake; | |
| 743 ) | |
| 41 | 744 { |
| 6 | 745 if (need_measurement) |
| 746 { | |
| 14 | 747 need_measurement = 0; |
| 6 | 748 do_measurement(); |
| 44 | 749 continue; |
| 6 | 750 } |
| 751 | |
|
27
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|
752 if (have_cmd) |
|
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diff
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|
753 { |
|
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|
754 have_cmd = 0; |
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|
755 read_handler(); |
| 44 | 756 continue; |
|
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|
757 } |
|
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|
758 |
|
16
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|
759 // wait for commands from the master |
| 41 | 760 idle_sleep(); |
| 761 } | |
|
4
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|
762 |
| 6 | 763 uart_off(); |
|
46
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Use the PRR etc, set value to proper ones
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parents:
44
diff
changeset
|
764 // in case bluetooth takes time to flush |
|
9ccd965d938a
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Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
765 _delay_ms(100); |
|
16
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parents:
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diff
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|
766 set_aux_power(0); |
|
4
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diff
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|
767 } |
|
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diff
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|
768 |
| 7 | 769 static void |
| 770 blink() | |
| 771 { | |
| 772 PORT_LED &= ~_BV(PIN_LED); | |
| 9 | 773 _delay_ms(1); |
| 7 | 774 PORT_LED |= _BV(PIN_LED); |
| 775 } | |
| 776 | |
| 777 static void | |
| 778 long_delay(int ms) | |
| 779 { | |
| 780 int iter = ms / 100; | |
| 781 | |
| 782 for (int i = 0; i < iter; i++) | |
| 783 { | |
| 784 _delay_ms(100); | |
| 785 } | |
| 786 } | |
| 787 | |
| 8 | 788 ISR(BADISR_vect) |
| 789 { | |
| 14 | 790 //uart_on(); |
| 8 | 791 printf_P(PSTR("Bad interrupt\n")); |
| 792 } | |
| 793 | |
| 0 | 794 int main(void) |
| 795 { | |
|
16
5075d8c428bd
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diff
changeset
|
796 setup_chip(); |
|
5075d8c428bd
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parents:
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diff
changeset
|
797 blink(); |
| 9 | 798 |
|
16
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Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
799 set_aux_power(0); |
| 7 | 800 |
| 6 | 801 stdout = &mystdout; |
| 7 | 802 uart_on(); |
| 803 | |
|
16
5075d8c428bd
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diff
changeset
|
804 printf(PSTR("Started.\n")); |
| 13 | 805 |
| 80 | 806 load_params(); |
| 13 | 807 |
|
112
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split ds18b20 and fixed sensors
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parents:
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diff
changeset
|
808 // ds sensors come before fixed sensors. |
|
5234ccc416e8
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parents:
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diff
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|
809 init_ds_sensors(); |
|
5234ccc416e8
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Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
810 |
|
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diff
changeset
|
811 init_fixed_sensors(); |
|
76
6e47a61edc47
don't store sensors in eeprom, scan at startup instead
Matt Johnston <matt@ucc.asn.au>
parents:
75
diff
changeset
|
812 |
| 8 | 813 uart_off(); |
| 0 | 814 |
| 6 | 815 // turn off everything except timer2 |
|
46
9ccd965d938a
Use the PRR etc, set value to proper ones
Matt Johnston <matt@ucc.asn.au>
parents:
44
diff
changeset
|
816 PRR = _BV(PRTWI) | _BV(PRTIM0) | _BV(PRTIM1) | _BV(PRSPI) | _BV(PRUSART0) | _BV(PRADC); |
| 8 | 817 |
|
16
5075d8c428bd
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Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
818 setup_tick_counter(); |
|
5075d8c428bd
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parents:
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diff
changeset
|
819 |
| 12 | 820 sei(); |
| 8 | 821 |
|
25
2943f62c8e62
- Make the python work on openwrt
Matt Johnston <matt@ucc.asn.au>
parents:
24
diff
changeset
|
822 need_comms = 1; |
|
36
a670a67ba489
- decrease measurement interval, measure at start
Matt Johnston <matt@ucc.asn.au>
parents:
33
diff
changeset
|
823 need_measurement = 1; |
|
25
2943f62c8e62
- Make the python work on openwrt
Matt Johnston <matt@ucc.asn.au>
parents:
24
diff
changeset
|
824 |
|
16
5075d8c428bd
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Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
825 for(;;) |
|
5075d8c428bd
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Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
826 { |
|
90
a1c1c2d475b0
print the remainder of timers as well
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
827 if (button_pressed) |
|
a1c1c2d475b0
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Matt Johnston <matt@ucc.asn.au>
parents:
89
diff
changeset
|
828 { |
|
a1c1c2d475b0
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Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
829 // debounce |
|
a1c1c2d475b0
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Matt Johnston <matt@ucc.asn.au>
parents:
89
diff
changeset
|
830 _delay_ms(200); |
|
a1c1c2d475b0
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Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
831 need_comms = 1; |
|
a1c1c2d475b0
print the remainder of timers as well
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
832 comms_timeout = wake_secs; |
|
a1c1c2d475b0
print the remainder of timers as well
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
833 button_pressed = 0; |
| 41 | 834 continue; |
| 1 | 835 } |
|
4
54d369e3d689
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
836 |
|
54d369e3d689
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
837 if (need_comms) |
|
54d369e3d689
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
838 { |
|
16
5075d8c428bd
untested, add comms timeout code
Matt Johnston <matt@ucc.asn.au>
parents:
15
diff
changeset
|
839 need_comms = 0; |
|
4
54d369e3d689
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
840 do_comms(); |
| 41 | 841 continue; |
|
4
54d369e3d689
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
842 } |
|
54d369e3d689
Fill out more main.c structure
Matt Johnston <matt@ucc.asn.au>
parents:
3
diff
changeset
|
843 |
| 97 | 844 if (need_measurement) |
| 845 { | |
| 846 need_measurement = 0; | |
| 847 do_measurement(); | |
| 848 continue; | |
| 849 } | |
| 850 | |
| 41 | 851 deep_sleep(); |
| 0 | 852 } |
| 12 | 853 |
| 0 | 854 return 0; /* never reached */ |
| 855 } |