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Teacup_Firmware
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changes by jv4779 via pull request 14

This commit is contained in:
Michael Moon 2010-10-27 14:07:09 +11:00
parent 38cf934594
commit 1e287dd6c3
3 changed files with 53 additions and 32 deletions
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45
analog.c
View File

@ -9,6 +9,32 @@
uint8_t adc_running_mask, adc_counter;
#if ANALOG_MASK & 1
#define ANALOG_START 0
#define ANALOG_START_MASK 1
#elif ANALOG_MASK & 2
#define ANALOG_START 1
#define ANALOG_START_MASK 2
#elif ANALOG_MASK & 4
#define ANALOG_START 2
#define ANALOG_START_MASK 4
#elif ANALOG_MASK & 8
#define ANALOG_START 3
#define ANALOG_START_MASK 8
#elif ANALOG_MASK & 16
#define ANALOG_START 4
#define ANALOG_START_MASK 16
#elif ANALOG_MASK & 32
#define ANALOG_START 5
#define ANALOG_START_MASK 32
#elif ANALOG_MASK & 64
#define ANALOG_START 6
#define ANALOG_START_MASK 64
#elif ANALOG_MASK & 128
#define ANALOG_START 7
#define ANALOG_START_MASK 128
#endif
volatile uint16_t adc_result[8] __attribute__ ((__section__ (".bss")));
void analog_init() {
@ -35,7 +61,7 @@ void analog_init() {
#endif
}
ISR(ADC_vect) {
ISR(ADC_vect, ISR_NOBLOCK) {
// emulate free-running mode but be more deterministic about exactly which result we have, since this project has long-running interrupts
adc_result[ADMUX & 0x0F] = ADC;
// find next channel
@ -43,11 +69,8 @@ ISR(ADC_vect) {
adc_counter++;
adc_running_mask <<= 1;
if (adc_counter == 8) {
adc_counter = 0;
adc_running_mask = 1;
// relax interrupt use for analog subsystem- stop after last analog read
ADCSRA &= ~MASK(ADIE);
adc_counter = ANALOG_START;
adc_running_mask = ANALOG_START_MASK;
}
} while ((adc_running_mask & ANALOG_MASK) == 0);
@ -57,19 +80,19 @@ ISR(ADC_vect) {
}
uint16_t analog_read(uint8_t channel) {
uint8_t sreg;
uint16_t r;
uint8_t sreg;
// save interrupt flag
sreg = SREG;
// disable interrupts
cli();
// atomic 16-bit copy
r = adc_result[channel];
// restore interrupt flag
SREG = sreg;
// re-enable analog read loop so we can get new values
ADCSRA |= MASK(ADIE);
return r;
}

2
config.h.dist
View File

@ -178,7 +178,7 @@ struct {
REFERENCE - which analog reference to use. see analog.h for choices
ANALOG_MASK - which analog inputs we will be using, bitmask. eg; #define ANALOG_MASK MASK(AIO0_PIN) | MASK(3) for AIN0 and AIN3
*/
#define REFERENCE REFERENCE_AREF
#define REFERENCE REFERENCE_AVCC
#ifndef ANALOG_MASK
#define ANALOG_MASK 0

38
temp.c
View File

@ -117,9 +117,6 @@ void temp_sensor_tick() {
}
else {
uint16_t temp = 0;
#ifdef TEMP_THERMISTOR
uint8_t j;
#endif
//time to deal with this temp sensor
switch(temp_sensors[i].temp_type) {
#ifdef TEMP_MAX6675
@ -173,25 +170,26 @@ void temp_sensor_tick() {
#ifdef TEMP_THERMISTOR
case TT_THERMISTOR:
//Read current temperature
temp = analog_read(temp_sensors[i].temp_pin);
//Calculate real temperature based on lookup table
for (j = 1; j < NUMTEMPS; j++) {
if (pgm_read_word(&(temptable[j][0])) > temp) {
// multiply by 4 because internal temp is stored as 14.2 fixed point
temp = pgm_read_word(&(temptable[j][1])) + (pgm_read_word(&(temptable[j][0])) - temp) * 4 * (pgm_read_word(&(temptable[j-1][1])) - pgm_read_word(&(temptable[j][1]))) / (pgm_read_word(&(temptable[j][0])) - pgm_read_word(&(temptable[j-1][0])));
break;
do {
uint8_t j;
//Read current temperature
temp = analog_read(temp_sensors[i].temp_pin);
//Calculate real temperature based on lookup table
for (j = 1; j < NUMTEMPS; j++) {
if (pgm_read_word(&(temptable[j][0])) > temp) {
// multiply by 4 because internal temp is stored as 14.2 fixed point
temp = pgm_read_word(&(temptable[j][1])) * 4 + (pgm_read_word(&(temptable[j][0])) - temp) * 4 * (pgm_read_word(&(temptable[j-1][1])) - pgm_read_word(&(temptable[j][1]))) / (pgm_read_word(&(temptable[j][0])) - pgm_read_word(&(temptable[j-1][0])));
break;
}
}
//Clamp for overflows
if (j == NUMTEMPS)
temp = temptable[NUMTEMPS-1][1] * 4;
temp_sensors_runtime[i].next_read_time = 0;
}
//Clamp for overflows
if (j == NUMTEMPS)
temp = temptable[NUMTEMPS-1][1];
temp_sensors_runtime[i].next_read_time = 0;
break;
#endif /* TEMP_THERMISTOR */