/*
 * adc.h
 *
 *  Created on: Mar 31, 2023
 *      Author: Keith.Lloyd
 */

#ifndef ADC_H_
#define ADC_H_


#include "arm_math.h"

#define ADC_NUM_AVERAGES		10		//number of samples averaged for measurements

#define ADC_VREF				3.3 //3.23	//ADC reference voltage = 3v3 supply (Measured @ 3.23v)
#define ADC_HALF_COUNTS			2048	//half of max ADC reading
#define ADC_OFFSET_MAX_ERROR	30		//maximum allowed error for ADC offset measurement




#define ADC_USE_NOISE_OFFSET	1		//Use a standard noise offset
#define ADC_NOISE_OFFSET_COUNTS	13		//ADC offset due to precision rectifier noise conversion to DC

#define ADC_CORRECT_FOR_CURRENT_NOISE	1	//Correct current measurement for noise from the precision rectifier


#define ADC_USE_CURRENT_TABLE	1		//Use the current table to scale current measurements
#define ADC_TABLE_COLUMNS		2		//number of columns for current and voltage tables
#define ADC_TABLE_COLUMNS2		3		//number of columns for current and voltage tables with offset
#define ADC_TABLE_FREQ			0		//frequency column in current and voltage tables
#define ADC_TABLE_SCALE			1		//scale column in current and voltage tables
#define ADC_TABLE_OFFSET		2		//offset column in current tables


#define ADC_LOW_GAIN_CURR_CLIP_THRESH	1050	//LOW gain current measurement clipping threshold (in ADC counts)
#define ADC_HIGH_GAIN_CURR_CLIP_THRESH	800		//HIGH gain current measurement clipping threshold (in ADC counts)

#define ADC_LOW_GAIN_VOLT_CLIP_THRESH	1050
#define ADC_HIGH_GAIN_VOLT_CLIP_THRESH	800

#define ADC_MEASUREMENT_TEST	0		//Collect ADC data @ adc sampleRate when triggered. FOR TESTING

#if ADC_MEASUREMENT_TEST
#define ADC_NUM_TEST			40		//10mS samples
#endif

typedef struct {
	bool	measure;			//measure ADC values in timer ISR
	//current measurement offset
	bool iosOK;					//current offset within limits, use it
	uint32_t I_OffsetAdc;		//Current channel offset - measured @ startup
	uint32_t rawCurrent;		//raw current measurement used for offset

	//Voltage measurement offset
	bool vosOK;					//voltage offset error within limits, use it
	uint32_t V_OffsetAdc;		//VOltage channel offset - measured @ startup
	uint32_t rawVoltage;		//raw voltage measurement used for offset

	bool currentClipping; 		//Current measurement clip status (for LOW and HIGH gains)
	bool voltageClipping;		//Voltage measurement clip status (for LOW and HIGH gains)


	//storage for raw ADC values (0 - 4096). Sum up samples
	uint32_t V_ID1_RAW;		//ch5 Port A identifier.
	uint32_t V_ID2_RAW;		//ch6 Port B identifier
	uint32_t V_CHK_RAW;		//ch7 Incoming voltage eg. 110V
	uint32_t V_PSU_RAW;		//ch3 Power supply monitor
	uint32_t V_TMP_RAW;		//ch8 External temperature
	uint32_t I_OUT_RAW;		// ch0 Current out
	uint32_t V_OUT_RAW;		// ch1 Volts Out
	uint32_t V_BAT_RAW;		//ch4 Battery Voltage
	uint32_t V_BID_RAW;		//ch10 Battery ID

	//Storage for scaled value - float32_t
	float32_t V_ID1;
	float32_t V_ID2;
	float32_t V_CHK;
	float32_t V_BID;
	float32_t V_BAT;
	float32_t I_OUT;
	float32_t V_OUT;
	float32_t V_TMP;
	float32_t V_PSU;

	//Storage for filtered values - float32_t
	float32_t I_OUT_SlowFilt;
	float32_t V_OUT_SlowFilt;
	float32_t V_OUT_FastFilt;
	float32_t I_OUT_FastFilt;
	float32_t Ohms_slowfilt;


	// Delay Lines for filters
	float32_t V_OUT_Delay;
	float32_t I_OUT_Delay;
	float32_t V_OUT_FastDelay;
	float32_t I_OUT_FastDelay;
	float32_t Ohms_FastDelay;
	float32_t Ohms_SlowDelay;

#if 1	//ADC raw current filtering - This is for testing
	float32_t IRaw;
	float32_t IRawFilt;
	float32_t IRawDelay;
#endif

#if 1	//ADC raw voltage filtering - This is for testing
	float32_t VRaw;
	float32_t VRawFilt;
	float32_t VRawDelay;
#endif
	uint32_t diag_bat; // commented test value for battery diagnosis
	//TESTING - faster current measurement without averaging
#if ADC_MEASUREMENT_TEST
	bool		testCollectData;
	uint32_t 	testIndex;
	//storage for sampled data
	float32_t testData1[ADC_NUM_TEST];
	float32_t testData2[ADC_NUM_TEST];


	float32_t testIout;
	float32_t testIoutDelay;

	float32_t testVout;
	float32_t testVoutDelay;

#endif

}ADC_t;


void ADC_SysInit(void);
void ADC_MeasureCurrentOffset(void);
void ADC_Update(void);
float32_t FILT_ExpAvgF32(float32_t input, float32_t *temp, float32_t k);


#endif /* ADC_H_ */