142 lines
4.1 KiB
C
142 lines
4.1 KiB
C
/*
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* adc.h
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*
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* Created on: Mar 31, 2023
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* Author: Keith.Lloyd
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*/
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#ifndef ADC_H_
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#define ADC_H_
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#include "arm_math.h"
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#define ADC_NUM_AVERAGES 10 //number of samples averaged for measurements
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#define ADC_VREF 3.3 //3.23 //ADC reference voltage = 3v3 supply (Measured @ 3.23v)
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#define ADC_HALF_COUNTS 2048 //half of max ADC reading
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#define ADC_OFFSET_MAX_ERROR 30 //maximum allowed error for ADC offset measurement
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#define ADC_USE_NOISE_OFFSET 1 //Use a standard noise offset
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#define ADC_NOISE_OFFSET_COUNTS 13 //ADC offset due to precision rectifier noise conversion to DC
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#define ADC_CORRECT_FOR_CURRENT_NOISE 1 //Correct current measurement for noise from the precision rectifier
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#define ADC_USE_CURRENT_TABLE 1 //Use the current table to scale current measurements
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#define ADC_TABLE_COLUMNS 2 //number of columns for current and voltage tables
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#define ADC_TABLE_COLUMNS2 3 //number of columns for current and voltage tables with offset
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#define ADC_TABLE_FREQ 0 //frequency column in current and voltage tables
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#define ADC_TABLE_SCALE 1 //scale column in current and voltage tables
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#define ADC_TABLE_OFFSET 2 //offset column in current tables
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#define ADC_LOW_GAIN_CURR_CLIP_THRESH 1050 //LOW gain current measurement clipping threshold (in ADC counts)
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#define ADC_HIGH_GAIN_CURR_CLIP_THRESH 800 //HIGH gain current measurement clipping threshold (in ADC counts)
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#define ADC_LOW_GAIN_VOLT_CLIP_THRESH 1050
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#define ADC_HIGH_GAIN_VOLT_CLIP_THRESH 800
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#define ADC_MEASUREMENT_TEST 0 //Collect ADC data @ adc sampleRate when triggered. FOR TESTING
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#if ADC_MEASUREMENT_TEST
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#define ADC_NUM_TEST 40 //10mS samples
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#endif
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typedef struct {
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bool measure; //measure ADC values in timer ISR
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//current measurement offset
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bool iosOK; //current offset within limits, use it
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uint32_t I_OffsetAdc; //Current channel offset - measured @ startup
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uint32_t rawCurrent; //raw current measurement used for offset
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//Voltage measurement offset
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bool vosOK; //voltage offset error within limits, use it
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uint32_t V_OffsetAdc; //VOltage channel offset - measured @ startup
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uint32_t rawVoltage; //raw voltage measurement used for offset
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bool currentClipping; //Current measurement clip status (for LOW and HIGH gains)
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bool voltageClipping; //Voltage measurement clip status (for LOW and HIGH gains)
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//storage for raw ADC values (0 - 4096). Sum up samples
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uint32_t V_ID1_RAW; //ch5 Port A identifier.
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uint32_t V_ID2_RAW; //ch6 Port B identifier
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uint32_t V_CHK_RAW; //ch7 Incoming voltage eg. 110V
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uint32_t V_PSU_RAW; //ch3 Power supply monitor
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uint32_t V_TMP_RAW; //ch8 External temperature
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uint32_t I_OUT_RAW; // ch0 Current out
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uint32_t V_OUT_RAW; // ch1 Volts Out
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uint32_t V_BAT_RAW; //ch4 Battery Voltage
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uint32_t V_BID_RAW; //ch10 Battery ID
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//Storage for scaled value - float32_t
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float32_t V_ID1;
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float32_t V_ID2;
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float32_t V_CHK;
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float32_t V_BID;
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float32_t V_BAT;
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float32_t I_OUT;
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float32_t V_OUT;
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float32_t V_TMP;
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float32_t V_PSU;
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//Storage for filtered values - float32_t
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float32_t I_OUT_SlowFilt;
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float32_t V_OUT_SlowFilt;
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float32_t V_OUT_FastFilt;
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float32_t I_OUT_FastFilt;
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float32_t Ohms_slowfilt;
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// Delay Lines for filters
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float32_t V_OUT_Delay;
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float32_t I_OUT_Delay;
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float32_t V_OUT_FastDelay;
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float32_t I_OUT_FastDelay;
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float32_t Ohms_FastDelay;
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float32_t Ohms_SlowDelay;
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#if 1 //ADC raw current filtering - This is for testing
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float32_t IRaw;
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float32_t IRawFilt;
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float32_t IRawDelay;
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#endif
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#if 1 //ADC raw voltage filtering - This is for testing
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float32_t VRaw;
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float32_t VRawFilt;
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float32_t VRawDelay;
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#endif
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uint32_t diag_bat; // commented test value for battery diagnosis
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//TESTING - faster current measurement without averaging
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#if ADC_MEASUREMENT_TEST
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bool testCollectData;
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uint32_t testIndex;
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//storage for sampled data
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float32_t testData1[ADC_NUM_TEST];
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float32_t testData2[ADC_NUM_TEST];
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float32_t testIout;
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float32_t testIoutDelay;
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float32_t testVout;
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float32_t testVoutDelay;
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#endif
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}ADC_t;
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void ADC_SysInit(void);
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void ADC_MeasureCurrentOffset(void);
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void ADC_Update(void);
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float32_t FILT_ExpAvgF32(float32_t input, float32_t *temp, float32_t k);
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#endif /* ADC_H_ */
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