95 lines
4.6 KiB
C
95 lines
4.6 KiB
C
// File: Amperometric.h
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/*!
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*****************************************************************************
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@file: Amperometric.h
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@author: $Author: mlambe $
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@brief: Amperometric measurement header file.
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@version: $Revision: 766 $
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@date: $Date: 2018-03-21 14:09:35 +0100 (Wed, 21 Mar 2018) $
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-----------------------------------------------------------------------------
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Copyright (c) 2017-2019 Analog Devices, Inc. All Rights Reserved.
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This software is proprietary to Analog Devices, Inc. and its licensors.
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By using this software you agree to the terms of the associated
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Analog Devices Software License Agreement.
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*****************************************************************************/
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#ifndef _AMPEROMETRIC_H_
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#define _AMPEROMETRIC_H_
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#include "ad5940.h"
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#include "stdio.h"
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#include "string.h"
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#include "math.h"
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#define DAC12BITVOLT_1LSB (2200.0f/4095) //mV
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#define DAC6BITVOLT_1LSB (DAC12BITVOLT_1LSB*64) //mV
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/*
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Note: this example will use SEQID_0 as measurement sequence, and use SEQID_1 as init sequence.
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SEQID_3 is used for calibration.
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*/
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typedef struct
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{
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/* Common configurations for all kinds of Application. */
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BoolFlag bParaChanged; /* Indicate to generate sequence again. It's auto cleared by AppAMPInit */
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uint32_t SeqStartAddr; /* Initialaztion sequence start address in SRAM of AD5940 */
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uint32_t MaxSeqLen; /* Limit the maximum sequence. */
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uint32_t SeqStartAddrCal; /* Measurement sequence start address in SRAM of AD5940 */
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uint32_t MaxSeqLenCal;
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/* Application related parameters */
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BoolFlag ReDoRtiaCal; /* Set this flag to bTRUE when there is need to do calibration. */
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float SysClkFreq; /* The real frequency of system clock */
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float WuptClkFreq; /* The clock frequency of Wakeup Timer in Hz. Typically it's 32kHz. Leave it here in case we calibrate clock in software method */
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float AdcClkFreq; /* The real frequency of ADC clock */
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uint32_t FifoThresh; /* FIFO threshold. Should be N*4 */
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float AmpODR; /* in Hz. ODR decides the period of WakeupTimer who will trigger sequencer periodically.*/
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int32_t NumOfData; /* By default it's '-1'. If you want the engine stops after get NumofData, then set the value here. Otherwise, set it to '-1' which means never stop. */
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float RcalVal; /* Rcal value in Ohm */
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float ADCRefVolt; /* Measured 1.82 V reference*/
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uint32_t PwrMod; /* Control Chip power mode(LP/HP) */
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uint32_t ADCPgaGain; /* PGA Gain select from GNPGA_1, GNPGA_1_5, GNPGA_2, GNPGA_4, GNPGA_9 !!! We must ensure signal is in range of +-1.5V which is limited by ADC input stage */
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uint8_t ADCSinc3Osr; /* SINC3 OSR selection. ADCSINC3OSR_2, ADCSINC3OSR_4 */
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uint8_t ADCSinc2Osr; /* SINC2 OSR selection. ADCSINC2OSR_22...ADCSINC2OSR_1333 */
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uint32_t DataFifoSrc; /* DataFIFO source. FIFOSRC_SINC3, FIFOSRC_DFT, FIFOSRC_SINC2NOTCH, FIFOSRC_VAR, FIFOSRC_MEAN*/
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uint32_t LptiaRtiaSel; /* Use internal RTIA, select from RTIA_INT_200, RTIA_INT_1K, RTIA_INT_5K, RTIA_INT_10K, RTIA_INT_20K, RTIA_INT_40K, RTIA_INT_80K, RTIA_INT_160K */
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uint32_t LpTiaRf; /* Rfilter select */
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uint32_t LpTiaRl; /* SE0 Rload select */
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fImpPol_Type RtiaCalValue; /* Calibrated Rtia value */
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float Vzero; /* Voltage on SE0 pin and Vzero, optimumly 1100mV*/
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float SensorBias; /* Sensor bias voltage = VRE0 - VSE0 */
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BoolFlag ExtRtia; /* Use internal or external Rtia */
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float ExtRtiaVal; /* External Rtia value if using one */
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BoolFlag AMPInited; /* If the program run firstly, generated sequence commands */
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SEQInfo_Type InitSeqInfo;
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SEQInfo_Type MeasureSeqInfo;
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BoolFlag StopRequired; /* After FIFO is ready, stop the measurement sequence */
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uint32_t FifoDataCount; /* Count how many times impedance have been measured */
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/* End */
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}AppAMPCfg_Type;
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/**
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* int32_t type Impedance result in Cartesian coordinate
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*/
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typedef struct
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{
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float Current;
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float Voltage;
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}fAmpRes_Type;
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#define AMPCTRL_START 0
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#define AMPCTRL_STOPNOW 1
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#define AMPCTRL_STOPSYNC 2
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#define AMPCTRL_SHUTDOWN 4 /* Note: shutdown here means turn off everything and put AFE to hibernate mode. The word 'SHUT DOWN' is only used here. */
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AD5940Err AppAMPGetCfg(void *pCfg);
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AD5940Err AppAMPInit(uint32_t *pBuffer, uint32_t BufferSize);
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AD5940Err AppAMPISR(void *pBuff, uint32_t *pCount);
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AD5940Err AppAMPCtrl(int32_t AmpCtrl, void *pPara);
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float AppAMPCalcVoltage(uint32_t ADCcode);
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float AppAMPCalcCurrent(uint32_t ADCcode);
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#endif |