Adc.h

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#pragma once
#include <Arduino.h>
#include <stddef.h>
#include <stdint.h>
 
#include "Timer.h"
 
namespace adc {
 
enum struct BitResolution : uint8_t {
    Eight = 8,
    Ten = 10,
};
 
size_t bytes_per_sample(BitResolution res);
 
extern const size_t MAX_CHANNEL_COUNT;
 
struct Channel {
    uint8_t pin;
    int8_t power;
    bool active_high;
 
    explicit Channel(uint8_t _pin, int8_t _power, bool _active_high)
        : pin(_pin), power(_power), active_high(_active_high) {}
 
    inline int8_t mux_mask();
};
 
enum struct AutotriggerSource : uint8_t {
    FreeRunning = 0b000,      
    AnalogComparator = 0b001, 
    ExternalIrq0 = 0b010,     
    TimCnt0CmpA = 0b011,      
    TimCnt0Ovf = 0b100,       
    TimCnt1CmpB = 0b101,      
    TimCnt1Ovf = 0b110,       
    TimCnt1Cap = 0b111,       
};
 
bool init(uint8_t _nchannels, Channel* _channels, uint8_t* _buf, size_t _sz);
 
int8_t start(BitResolution res, uint32_t sample_rate, size_t ch_window_sz = 1,
             uint32_t warmup_ms = 100);
 
uint32_t stop();
 
uint32_t collected();
 
void on();
 
void off();
 
void sleep();
 
int8_t swap_buffer(uint8_t** buf, size_t& sz, size_t& ch_index);
 
int8_t drain_buffer(uint8_t** buf, size_t& sz, size_t& ch_index);
 
}  // namespace adc