16b9acf8bc
Read from ADC as fast as possible using the ADC interrupt to get more accurate instantaneous readings. Decouple the temperature_isr from the adc reading interval, so that the two can run independently for future use.
24 lines
713 B
C
24 lines
713 B
C
#pragma once
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#include <inttypes.h>
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#include "config.h"
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/*
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http://resnet.uoregon.edu/~gurney_j/jmpc/bitwise.html
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*/
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#define BITCOUNT(x) (((BX_(x)+(BX_(x)>>4)) & 0x0F0F0F0F) % 255)
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#define BX_(x) ((x) - (((x)>>1)&0x77777777) - (((x)>>2)&0x33333333) - (((x)>>3)&0x11111111))
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#define ADC_PIN_IDX(pin) BITCOUNT(ADC_CHAN_MSK & ((1 << (pin)) - 1))
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#if BITCOUNT(ADC_CHAN_MSK) != ADC_CHAN_CNT
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# error "ADC_CHAN_MSK oes not match ADC_CHAN_CNT"
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#endif
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extern volatile uint8_t adc_channel;
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extern volatile uint16_t adc_values[ADC_CHAN_CNT];
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extern void adc_init();
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extern void adc_start_cycle(); //should be called from an atomic context only
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static inline bool adc_cycle_done() { return adc_channel >= ADC_CHAN_CNT; }
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