adc.h

#ifndef ADC_H
#define ADC_H

#include "dev_data.h"
#include "features.h"

#if defined(N_ADC)

typedef struct {
	uint8_t flags;
	uint16_t value;
	uint16_t lower;
	uint16_t upper;
} adc_t;
extern adc_t adcs[];

// the first two bits are used for adc_out_t, i.e. PO_* constants. Hardcoded.
#define ADC_MASK       ((1<<3)-1)
#define ADC_VBG        0x01
#define ADC_VGND       0x02
#define ADC_VTEMP      0x03
#define ADC_ALT        (1<<3)  // use Vbg et al, not analog inputs 0-7
#define ADC_REF        (1<<4)  // use Vbg as reference, not Vdd
#define ADC_ALERT      (1<<5)  // trigger an alarm when stepping over boundary
#define ADC_IS_ALERT_L (1<<6)  // alarm triggered (low)?
#define ADC_IS_ALERT_H (1<<7)  // alarm triggered (high)?

#ifdef CONDITIONAL_SEARCH
extern uint8_t adc_changed_cache;
#endif

#endif // any inputs or outputs at all
#endif // adc_h