#ifndef SAMPLING_H_
#define SAMPLING_H_

#include <stdint.h>

#define ADC_BUFFER_SIZE 2048 // size must be a power of 2

// index wrapping macro
#define ADC_BUFFER_WRAP(i) ((i) & (ADC_BUFFER_SIZE - 1))

volatile int32_t gADCBufferIndex;
volatile uint16_t gADCBuffer[ADC_BUFFER_SIZE]; // circular buffer
volatile uint32_t gADCErrors; // number of missed ADC deadlines

// initialize ADC and ISR
void start_sampler(void);

void set_frequency(uint64_t microseconds);

#endif /* SAMPLING_H_ */