/**
 * @file	AdcConfiguration.h
 *
 * @date May 3, 2014
 * @author Andrey Belomutskiy, (c) 2012-2020
 */

#pragma once

#if HAL_USE_ADC

#define ADC_MAX_CHANNELS_COUNT 16

// this structure contains one multi-channel ADC state snapshot
typedef struct {
	volatile adcsample_t adc_data[ADC_MAX_CHANNELS_COUNT];
} adc_state;

class AdcDevice {
public:
	explicit AdcDevice(ADCConversionGroup* hwConfig);
	void enableChannel(adc_channel_e hwChannelIndex);
	void enableChannelAndPin(adc_channel_e hwChannelIndex);
	adc_channel_e getAdcHardwareIndexByInternalIndex(int index) const;
	int internalAdcIndexByHardwareIndex[20];
	bool isHwUsed(adc_channel_e hwChannel) const;
	int size() const;
	void init(void);
	int conversionCount;
	int errorsCount;
	int getAdcValueByIndex(int internalIndex) const;
	void invalidateSamplesCache();

	// on F7 this must be aligned on a 32-byte boundary, and be a multiple of 32 bytes long.
	// When we invalidate the cache line(s) for ADC samples, we don't want to nuke any
	// adjacent data.
	// F4 does not care
	__ALIGNED(32) adcsample_t samples[ADC_MAX_CHANNELS_COUNT * MAX_ADC_GRP_BUF_DEPTH];
	// Assert multiple of 32 bytes long so we don't stomp on the data after the buffer
	static_assert(sizeof(samples) % 32 == 0, "ADC sample buffer size must be a multiple of 32 bytes");

	int getAdcValueByHwChannel(int hwChannel) const;

	adc_state values;
	int channelCount;
private:
	ADCConversionGroup* hwConfig;
	/**
	 * Number of ADC channels in use
	 */

	adc_channel_e hardwareIndexByIndernalAdcIndex[20];
};

#endif /* HAL_USE_ADC */