46 lines
908 B
C
46 lines
908 B
C
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//adc.h
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#ifndef _ADC_H
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#define _ADC_H
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#include <inttypes.h>
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#include "config.h"
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#if defined(__cplusplus)
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extern "C" {
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#endif //defined(__cplusplus)
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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 uint8_t adc_state;
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extern uint8_t adc_count;
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extern uint16_t adc_values[ADC_CHAN_CNT];
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extern uint16_t adc_sim_mask;
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extern void adc_init(void);
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extern void adc_reset(void);
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extern void adc_setmux(uint8_t ch);
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extern uint8_t adc_chan(uint8_t index);
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extern void adc_cycle(void);
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#if defined(__cplusplus)
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}
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#endif //defined(__cplusplus)
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#endif //_ADC_H
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