AD5941
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The AD5940 and AD5941 are high precision, low power analog front ends (AFEs) designed for portable applications that require high precision, electrochemical...
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AD5941 on Analog.com
ADG636
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The ADG636 is a monolithic device, comprising two indepen-dently selectable CMOS single pole, double throw (SPDT) switches. When on, each switch conducts...
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ADG636 on Analog.com
AD5940
Recommended for New Designs
The AD5940 and AD5941 are high precision, low power analog front ends (AFEs) designed for portable applications that require high precision, electrochemical...
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AD5940 on Analog.com
Hi! I am working with CN0510 Board with NUCLEo-F411RE and I have Loaded my board with BATImpedance Project which is available on Github. I am currently using 50 m ohm Resistor with a Lead Acid battery to study the impedance spectrum of The battery but the problem is that I don't get valid impedance! could you please help me solve the problem?
Hi,
Could you please check with the below code:
/*BATImpedance.c*/
#include "BATImpedance.h"
/*
Application configuration structure. Specified by user from template.
The variables are usable in this whole application.
It includes basic configuration for sequencer generator and application related parameters
*/
AppBATCfg_Type AppBATCfg =
{
.state = STATE_IDLE,
.bParaChanged = bFALSE,
.SeqStartAddr = 0,
.MaxSeqLen = 0,
.SeqStartAddrCal = 0,
.MaxSeqLenCal = 0,
.SysClkFreq = 16000000.0,
.WuptClkFreq = 32000.0,
.AdcClkFreq = 16000000.0,
.BatODR = 20.0, /* 20.0 Hz*/
.NumOfData = -1,
.PwrMod = AFEPWR_LP,
.ACVoltPP = 800.0,
.DCVolt = 1100.0f,
.SinFreq = 50000.0, /* 50kHz */
.RcalVal = 50.0, /* 50mOhm */
.ADCSinc3Osr = ADCSINC3OSR_4,
.ADCSinc2Osr = ADCSINC2OSR_22,
.DftNum = DFTNUM_16384,
.DftSrc = DFTSRC_SINC3,
.HanWinEn = bTRUE,
.FifoThresh = 4,
.BATInited = bFALSE,
.StopRequired = bFALSE,
.MeasSeqCycleCount = 0,
.SweepCfg.SweepEn = bTRUE,
.SweepCfg.SweepStart = 1000,
.SweepCfg.SweepStop = 100000.0,
.SweepCfg.SweepPoints = 101,
.SweepCfg.SweepLog = bFALSE,
.SweepCfg.SweepIndex = 0,
};
/**
This function is provided for upper controllers that want to change
application parameters specially for user defined parameters.
*/
AD5940Err AppBATGetCfg(void *pCfg)
{
if(pCfg){
*(AppBATCfg_Type**)pCfg = &AppBATCfg;
return AD5940ERR_OK;
}
return AD5940ERR_PARA;
}
static void PreCharge(unsigned char channel)
{
void Arduino_WriteDn(uint32_t Dn, BoolFlag bHigh);
switch(channel)
{
case PRECHARGE_CH1: //00
Arduino_WriteDn(1<<3, bFALSE); //d3
Arduino_WriteDn(1<<4, bFALSE); //d4
break;
case PRECHARGE_CH2: //01
Arduino_WriteDn(1<<3, bTRUE);
Arduino_WriteDn(1<<4, bFALSE);
break;
case PRECHARGE_CH3://10
Arduino_WriteDn(1<<3, bFALSE);
Arduino_WriteDn(1<<4, bTRUE);
break;
default:
break;
}
AD5940_Delay10us(PRECHARGE_WAIT_MS*100);
Arduino_WriteDn(1<<3, bTRUE); //d3
Arduino_WriteDn(1<<4, bTRUE); //d4
}
AD5940Err AppBATCtrl(int32_t BatCtrl, void *pPara)
{
switch (BatCtrl)
{
case BATCTRL_START:
{
if(AD5940_WakeUp(10) > 10) /* Wakeup AFE by read register, read 10 times at most */
return AD5940ERR_WAKEUP; /* Wakeup Failed */
if(AppBATCfg.BATInited == bFALSE)
return AD5940ERR_APPERROR;
AD5940_WriteReg(REG_AFE_SWMUX, 1<<0); /* control ADG636 to measure battery */
AD5940_WriteReg(REG_AFE_SYNCEXTDEVICE, 0x0);
PreCharge(PRECHARGE_BAT);
PreCharge(PRECHARGE_AMP);
AD5940_FIFOCtrlS(FIFOSRC_DFT, bFALSE);
AD5940_FIFOThrshSet(AppBATCfg.FifoThresh); /* DFT result contains both real and image. */
AD5940_FIFOCtrlS(FIFOSRC_DFT, bTRUE);
AppBATCfg.state = STATE_BATTERY;
/* Trigger sequence using MMR write */
AD5940_SEQMmrTrig(SEQID_0);
AppBATCfg.FifoDataCount = 0; /* restart */
break;
}
case BATCTRL_STOPNOW:
{
if(AD5940_WakeUp(10) > 10) /* Wakeup AFE by read register, read 10 times at most */
return AD5940ERR_WAKEUP; /* Wakeup Failed */
/* Start Wupt right now */
AD5940_WUPTCtrl(bFALSE);
/* There is chance this operation will fail because sequencer could put AFE back
to hibernate mode just after waking up. Use STOPSYNC is better. */
AD5940_WUPTCtrl(bFALSE);
break;
}
case BATCTRL_STOPSYNC:
{
AppBATCfg.StopRequired = bTRUE;
break;
}
case BATCTRL_GETFREQ:
if(pPara)
{
if(AppBATCfg.SweepCfg.SweepEn == bTRUE)
*(float*)pPara = AppBATCfg.FreqofData;
else
*(float*)pPara = AppBATCfg.SinFreq;
}
break;
case BATCTRL_SHUTDOWN:
{
AppBATCtrl(BATCTRL_STOPNOW, 0); /* Stop the measurement if it's running. */
/* Turn off LPloop related blocks which are not controlled automatically by sleep operation */
AFERefCfg_Type aferef_cfg;
LPLoopCfg_Type lp_loop;
memset(&aferef_cfg, 0, sizeof(aferef_cfg));
AD5940_REFCfgS(&aferef_cfg);
memset(&lp_loop, 0, sizeof(lp_loop));
AD5940_LPLoopCfgS(&lp_loop);
AD5940_EnterSleepS(); /* Enter Hibernate */
}
break;
case BATCTRL_MRCAL:
if(AD5940_WakeUp(10) > 10)
return AD5940ERR_WAKEUP;
//Settle input RC filter.
AD5940_WriteReg(REG_AFE_SWMUX, 0); //control ADG636 to measure rcal
AD5940_WriteReg(REG_AFE_SYNCEXTDEVICE, 0x4);
PreCharge(PRECHARGE_RCAL);
PreCharge(PRECHARGE_AMP);
AD5940_FIFOCtrlS(FIFOSRC_DFT, bFALSE);
AD5940_FIFOThrshSet(2);
AD5940_FIFOCtrlS(FIFOSRC_DFT, bTRUE); //enable FIFO
AppBATMeasureRCAL();
break;
default:
break;
}
return AD5940ERR_OK;
}
/* Generate init sequence */
static AD5940Err AppBATSeqCfgGen(void)
{
AD5940Err error = AD5940ERR_OK;
uint32_t const *pSeqCmd;
uint32_t SeqLen;
AFERefCfg_Type aferef_cfg;
HSLoopCfg_Type hs_loop;
LPLoopCfg_Type lp_loop;
DSPCfg_Type dsp_cfg;
float sin_freq;
/* Start sequence generator here */
AD5940_SEQGenCtrl(bTRUE);
AD5940_AFECtrlS(AFECTRL_ALL, bFALSE); /* Disable all firstly. */
aferef_cfg.HpBandgapEn = bTRUE;
aferef_cfg.Hp1V1BuffEn = bTRUE;
aferef_cfg.Hp1V8BuffEn = bTRUE;
aferef_cfg.Disc1V1Cap = bFALSE;
aferef_cfg.Disc1V8Cap = bFALSE;
aferef_cfg.Hp1V8ThemBuff = bFALSE;
aferef_cfg.Hp1V8Ilimit = bFALSE;
aferef_cfg.Lp1V1BuffEn = bFALSE;
aferef_cfg.Lp1V8BuffEn = bFALSE;
/* LP reference control, Use LP loop to provide DC Bias voltage. */
aferef_cfg.LpBandgapEn = bTRUE;
aferef_cfg.LpRefBufEn = bTRUE;
aferef_cfg.LpRefBoostEn = bFALSE;
AD5940_REFCfgS(&aferef_cfg);
/* Determine buffer gain according to ACVoltPP */
hs_loop.HsDacCfg.ExcitBufGain = EXCITBUFGAIN_2;
hs_loop.HsDacCfg.HsDacGain = HSDACGAIN_1;
hs_loop.HsDacCfg.HsDacUpdateRate = 0x1B; //the maximum update rate is 16MHz/7
hs_loop.HsTiaCfg.DiodeClose = bFALSE;
hs_loop.HsTiaCfg.HstiaBias = HSTIABIAS_1P1;
hs_loop.HsTiaCfg.HstiaCtia = 31; //HSTIA is not used.
hs_loop.HsTiaCfg.HstiaDeRload = HSTIADERLOAD_OPEN;
hs_loop.HsTiaCfg.HstiaDeRtia = HSTIADERTIA_OPEN;
hs_loop.HsTiaCfg.HstiaRtiaSel = HSTIARTIA_10K;
hs_loop.SWMatCfg.Dswitch = SWD_CE0;
hs_loop.SWMatCfg.Pswitch = SWP_AIN1;
hs_loop.SWMatCfg.Nswitch = SWN_AIN0; //AIN0 is connected to AIN4 externally by JP3.
hs_loop.SWMatCfg.Tswitch = 0; //T switch is not used.
hs_loop.WgCfg.WgType = WGTYPE_SIN;
hs_loop.WgCfg.GainCalEn = bFALSE;
hs_loop.WgCfg.OffsetCalEn = bFALSE;
if(AppBATCfg.SweepCfg.SweepEn == bTRUE)
{
AppBATCfg.FreqofData = AppBATCfg.SweepCfg.SweepStart;
AppBATCfg.SweepCurrFreq = AppBATCfg.SweepCfg.SweepStart;
AD5940_SweepNext(&AppBATCfg.SweepCfg, &AppBATCfg.SweepNextFreq);
sin_freq = AppBATCfg.SweepCurrFreq;
}
else
{
sin_freq = AppBATCfg.SinFreq;
AppBATCfg.FreqofData = sin_freq;
}
hs_loop.WgCfg.SinCfg.SinFreqWord = AD5940_WGFreqWordCal(sin_freq, AppBATCfg.SysClkFreq);
hs_loop.WgCfg.SinCfg.SinAmplitudeWord = (uint32_t)(AppBATCfg.ACVoltPP/800.0f*2047 + 0.5f);
hs_loop.WgCfg.SinCfg.SinOffsetWord = 0;
hs_loop.WgCfg.SinCfg.SinPhaseWord = 0;
AD5940_HSLoopCfgS(&hs_loop);
//Use LP loop to output bias voltage on AIN4 pin, which provides voltage on AIN0(N switch).
lp_loop.LpDacCfg.LpdacSel = LPDAC0;
lp_loop.LpDacCfg.LpDacSrc = LPDACSRC_MMR;
lp_loop.LpDacCfg.LpDacSW = LPDACSW_VZERO2LPTIA|LPDACSW_VZERO2PIN;
lp_loop.LpDacCfg.LpDacVzeroMux = LPDACVZERO_12BIT;
lp_loop.LpDacCfg.LpDacVbiasMux = LPDACVBIAS_6BIT;
lp_loop.LpDacCfg.LpDacRef = LPDACREF_2P5;
lp_loop.LpDacCfg.DataRst = bFALSE;
lp_loop.LpDacCfg.PowerEn = bTRUE;
lp_loop.LpDacCfg.DacData12Bit = (uint32_t)((AppBATCfg.DCVolt-200)/2200.0f*4095);
lp_loop.LpDacCfg.DacData6Bit = 31; //not used. Set it to middle value.
lp_loop.LpAmpCfg.LpAmpSel = LPAMP0;
lp_loop.LpAmpCfg.LpAmpPwrMod = LPAMPPWR_NORM;
lp_loop.LpAmpCfg.LpPaPwrEn = bFALSE;
lp_loop.LpAmpCfg.LpTiaPwrEn = bTRUE;
lp_loop.LpAmpCfg.LpTiaRf = LPTIARF_20K; //External cap is 1uF.
lp_loop.LpAmpCfg.LpTiaRload = LPTIARLOAD_SHORT;
lp_loop.LpAmpCfg.LpTiaRtia = LPTIARTIA_OPEN;
lp_loop.LpAmpCfg.LpTiaSW = LPTIASW(7)|LPTIASW(5)|LPTIASW(9);
AD5940_LPLoopCfgS(&lp_loop);
dsp_cfg.ADCBaseCfg.ADCMuxN = ADCMUXN_AIN2;
dsp_cfg.ADCBaseCfg.ADCMuxP = ADCMUXP_AIN3;
dsp_cfg.ADCBaseCfg.ADCPga = ADCPGA_1P5;
memset(&dsp_cfg.ADCDigCompCfg, 0, sizeof(dsp_cfg.ADCDigCompCfg));
dsp_cfg.ADCFilterCfg.ADCAvgNum = ADCAVGNUM_16; /* Don't care because it's disabled */
dsp_cfg.ADCFilterCfg.ADCRate = ADCRATE_800KHZ;
dsp_cfg.ADCFilterCfg.ADCSinc2Osr = AppBATCfg.ADCSinc2Osr;
dsp_cfg.ADCFilterCfg.ADCSinc3Osr = AppBATCfg.ADCSinc3Osr;
dsp_cfg.ADCFilterCfg.BpSinc3 = bFALSE;
dsp_cfg.ADCFilterCfg.BpNotch = bTRUE;
dsp_cfg.ADCFilterCfg.Sinc2NotchEnable = bTRUE;
dsp_cfg.DftCfg.DftNum = AppBATCfg.DftNum;
dsp_cfg.DftCfg.DftSrc = AppBATCfg.DftSrc;
dsp_cfg.DftCfg.HanWinEn = AppBATCfg.HanWinEn;
memset(&dsp_cfg.StatCfg, 0, sizeof(dsp_cfg.StatCfg)); /* Don't care about Statistic */
AD5940_DSPCfgS(&dsp_cfg);
/* Enable all of them. They are automatically turned off during hibernate mode to save power */
AD5940_AFECtrlS(AFECTRL_HPREFPWR|AFECTRL_INAMPPWR|AFECTRL_EXTBUFPWR|\
AFECTRL_WG|AFECTRL_DACREFPWR|AFECTRL_HSDACPWR|\
AFECTRL_SINC2NOTCH, bTRUE);
/* Sequence end. */
AD5940_SEQGenInsert(SEQ_STOP()); /* Add one external command to disable sequencer for initialization sequence because we only want it to run one time. */
/* Stop here */
error = AD5940_SEQGenFetchSeq(&pSeqCmd, &SeqLen);
AD5940_SEQGenCtrl(bFALSE); /* Stop sequencer generator */
if(error == AD5940ERR_OK)
{
AppBATCfg.InitSeqInfo.SeqId = SEQID_1;
AppBATCfg.InitSeqInfo.SeqRamAddr = AppBATCfg.SeqStartAddr;
AppBATCfg.InitSeqInfo.pSeqCmd = pSeqCmd;
AppBATCfg.InitSeqInfo.SeqLen = SeqLen;
/* Write command to SRAM */
AD5940_SEQCmdWrite(AppBATCfg.InitSeqInfo.SeqRamAddr, pSeqCmd, SeqLen);
}
else
return error; /* Error */
return AD5940ERR_OK;
}
//the sequence used to measure battery response voltage.
static AD5940Err AppBATSeqMeasureGen(void)
{
AD5940Err error = AD5940ERR_OK;
uint32_t const *pSeqCmd;
uint32_t SeqLen;
uint32_t WaitClks;
ClksCalInfo_Type clks_cal;
clks_cal.DataType = DATATYPE_DFT;
clks_cal.DftSrc = AppBATCfg.DftSrc;
clks_cal.DataCount = 1L<<(AppBATCfg.DftNum+2); /* 2^(DFTNUMBER+2) */
clks_cal.ADCSinc2Osr = AppBATCfg.ADCSinc2Osr;
clks_cal.ADCSinc3Osr = AppBATCfg.ADCSinc3Osr;
clks_cal.ADCAvgNum = 0;
clks_cal.RatioSys2AdcClk = AppBATCfg.SysClkFreq/AppBATCfg.AdcClkFreq;
AD5940_ClksCalculate(&clks_cal, &WaitClks);
/* Start sequence generator here */
AD5940_SEQGenCtrl(bTRUE);
AD5940_SEQGenInsert(SEQ_WAIT(16*250)); /* wait 250us for reference power up from hibernate mode. */
AD5940_AFECtrlS(AFECTRL_WG|AFECTRL_ADCPWR|AFECTRL_SINC2NOTCH, bTRUE); /* Enable Waveform generator, ADC power */
AD5940_SEQGenInsert(SEQ_WAIT(16*50)); /* Wait for ADC ready. */
AD5940_AFECtrlS(AFECTRL_ADCCNV|AFECTRL_DFT, bTRUE); /* Start ADC convert and DFT */
AD5940_SEQGenFetchSeq(NULL, &AppBATCfg.SeqWaitAddr[0]); /* Record the start address of the next command. */
AD5940_SEQGenInsert(SEQ_WAIT(WaitClks/2));
AD5940_SEQGenInsert(SEQ_WAIT(WaitClks/2));
AD5940_AFECtrlS(AFECTRL_ADCCNV|AFECTRL_DFT/*|AFECTRL_WG*/|AFECTRL_ADCPWR|AFECTRL_SINC2NOTCH, bFALSE); /* Stop ADC convert and DFT */
//AD5940_EnterSleepS();/* Goto hibernate */
/* Sequence end. */
error = AD5940_SEQGenFetchSeq(&pSeqCmd, &SeqLen);
AD5940_SEQGenCtrl(bFALSE); /* Stop sequencer generator */
AppBATCfg.MeasSeqCycleCount = AD5940_SEQCycleTime();
AppBATCfg.MaxODR = 1/(((AppBATCfg.MeasSeqCycleCount + 10) / 16.0)* 1E-6) ;
if(AppBATCfg.BatODR > AppBATCfg.MaxODR)
{
/* We have requested a sampling rate that cannot be achieved with the time it
takes to acquire a sample.
*/
AppBATCfg.BatODR = AppBATCfg.MaxODR;
}
if(error == AD5940ERR_OK)
{
AppBATCfg.MeasureSeqInfo.SeqId = SEQID_0;
AppBATCfg.MeasureSeqInfo.SeqRamAddr = AppBATCfg.InitSeqInfo.SeqRamAddr + AppBATCfg.InitSeqInfo.SeqLen ;
AppBATCfg.MeasureSeqInfo.pSeqCmd = pSeqCmd;
AppBATCfg.MeasureSeqInfo.SeqLen = SeqLen;
/* Write command to SRAM */
AD5940_SEQCmdWrite(AppBATCfg.MeasureSeqInfo.SeqRamAddr, pSeqCmd, SeqLen);
}
else
return error; /* Error */
return AD5940ERR_OK;
}
/* This function provide application initialize. */
AD5940Err AppBATInit(uint32_t *pBuffer, uint32_t BufferSize)
{
AD5940Err error = AD5940ERR_OK;
SEQCfg_Type seq_cfg;
FIFOCfg_Type fifo_cfg;
if(AD5940_WakeUp(10) > 10) /* Wakeup AFE by read register, read 10 times at most */
return AD5940ERR_WAKEUP; /* Wakeup Failed */
/* Configure sequencer and stop it */
seq_cfg.SeqMemSize = SEQMEMSIZE_2KB; /* 2kB SRAM is used for sequencer, others for data FIFO */
seq_cfg.SeqBreakEn = bFALSE;
seq_cfg.SeqIgnoreEn = bFALSE;
seq_cfg.SeqCntCRCClr = bTRUE;
seq_cfg.SeqEnable = bFALSE;
seq_cfg.SeqWrTimer = 0;
AD5940_SEQCfg(&seq_cfg);
/* Reconfigure FIFO */
AD5940_FIFOCtrlS(FIFOSRC_DFT, bFALSE); /* Disable FIFO firstly */
fifo_cfg.FIFOEn = bTRUE;
fifo_cfg.FIFOMode = FIFOMODE_FIFO;
fifo_cfg.FIFOSize = FIFOSIZE_4KB; /* 4kB for FIFO, The reset 2kB for sequencer */
fifo_cfg.FIFOSrc = FIFOSRC_DFT;
fifo_cfg.FIFOThresh = AppBATCfg.FifoThresh; /* DFT result. One pair for RCAL, another for Rz. One DFT result have real part and imaginary part */
AD5940_FIFOCfg(&fifo_cfg);
AD5940_INTCClrFlag(AFEINTSRC_ALLINT);
/* Start sequence generator */
/* Initialize sequencer generator */
if((AppBATCfg.BATInited == bFALSE)||\
(AppBATCfg.bParaChanged == bTRUE))
{
if(pBuffer == 0) return AD5940ERR_PARA;
if(BufferSize == 0) return AD5940ERR_PARA;
AD5940_SEQGenInit(pBuffer, BufferSize);
/* Generate initialize sequence */
error = AppBATSeqCfgGen(); /* Application initialization sequence using either MCU or sequencer */
if(error != AD5940ERR_OK) return error;
/* Generate measurement sequence */
error = AppBATSeqMeasureGen();
if(error != AD5940ERR_OK) return error;
AppBATCfg.bParaChanged = bFALSE; /* Clear this flag as we already implemented the new configuration */
}
/* Initialization sequencer */
AppBATCfg.InitSeqInfo.WriteSRAM = bFALSE;
AD5940_SEQInfoCfg(&AppBATCfg.InitSeqInfo);
seq_cfg.SeqEnable = bTRUE;
AD5940_SEQCfg(&seq_cfg); /* Enable sequencer */
AD5940_SEQMmrTrig(AppBATCfg.InitSeqInfo.SeqId);
while(AD5940_INTCTestFlag(AFEINTC_1, AFEINTSRC_ENDSEQ) == bFALSE);
AppBATCheckFreq(AppBATCfg.SweepCfg.SweepStart);
/* Measurement sequence */
AppBATCfg.MeasureSeqInfo.WriteSRAM = bFALSE;
AD5940_SEQInfoCfg(&AppBATCfg.MeasureSeqInfo);
seq_cfg.SeqEnable = bTRUE;
AD5940_SEQCfg(&seq_cfg); /* Enable sequencer, and wait for trigger */
AD5940_ClrMCUIntFlag(); /* Clear interrupt flag generated before */
AD5940_AFEPwrBW(AppBATCfg.PwrMod, AFEBW_250KHZ);
AD5940_WriteReg(REG_AFE_SWMUX, 1<<1);
AppBATCfg.BATInited = bTRUE; /* BAT application has been initialized. */
return AD5940ERR_OK;
}
/* Depending on frequency of Sin wave set optimum filter settings */
AD5940Err AppBATCheckFreq(float freq)
{
ADCFilterCfg_Type filter_cfg;
DFTCfg_Type dft_cfg;
HSDACCfg_Type hsdac_cfg;
uint32_t WaitClks;
ClksCalInfo_Type clks_cal;
FreqParams_Type freq_params;
uint32_t SeqCmdBuff[32];
uint32_t SRAMAddr = 0;;
/* Step 1: Check Frequency */
freq_params = AD5940_GetFreqParameters(freq);
if(freq < 0.51)
{
hsdac_cfg.ExcitBufGain = EXCITBUFGAIN_2;
hsdac_cfg.HsDacGain = HSDACGAIN_1;
hsdac_cfg.HsDacUpdateRate = 0x1B;
AD5940_HSDacCfgS(&hsdac_cfg);
AD5940_HSRTIACfgS(HSTIARTIA_40K);
/*Update ADC rate */
filter_cfg.ADCRate = ADCRATE_800KHZ;
AppBATCfg.AdcClkFreq = 16e6;
/* Change clock to 16MHz oscillator */
AD5940_HPModeEn(bFALSE);
}
else if(freq < 5 )
{
hsdac_cfg.ExcitBufGain = EXCITBUFGAIN_2;
hsdac_cfg.HsDacGain = HSDACGAIN_1;
hsdac_cfg.HsDacUpdateRate = 0x1B;
AD5940_HSDacCfgS(&hsdac_cfg);
AD5940_HSRTIACfgS(HSTIARTIA_40K);
/*Update ADC rate */
filter_cfg.ADCRate = ADCRATE_800KHZ;
AppBATCfg.AdcClkFreq = 16e6;
/* Change clock to 16MHz oscillator */
AD5940_HPModeEn(bFALSE);
}else if(freq < 450)
{
hsdac_cfg.ExcitBufGain = EXCITBUFGAIN_2;
hsdac_cfg.HsDacGain = HSDACGAIN_1;
hsdac_cfg.HsDacUpdateRate = 0x1B;
AD5940_HSDacCfgS(&hsdac_cfg);
AD5940_HSRTIACfgS(HSTIARTIA_5K);
/*Update ADC rate */
filter_cfg.ADCRate = ADCRATE_800KHZ;
AppBATCfg.AdcClkFreq = 16e6;
/* Change clock to 16MHz oscillator */
AD5940_HPModeEn(bFALSE);
}
else if(freq<80000)
{
hsdac_cfg.ExcitBufGain = EXCITBUFGAIN_2;
hsdac_cfg.HsDacGain = HSDACGAIN_1;
hsdac_cfg.HsDacUpdateRate = 0x1B;
AD5940_HSDacCfgS(&hsdac_cfg);
AD5940_HSRTIACfgS(HSTIARTIA_5K);
/*Update ADC rate */
filter_cfg.ADCRate = ADCRATE_800KHZ;
AppBATCfg.AdcClkFreq = 16e6;
/* Change clock to 16MHz oscillator */
AD5940_HPModeEn(bFALSE);
}
/* High power mode */
if(freq >= 80000)
{
hsdac_cfg.ExcitBufGain = EXCITBUFGAIN_2;
hsdac_cfg.HsDacGain = HSDACGAIN_1;
hsdac_cfg.HsDacUpdateRate = 0x07;
AD5940_HSDacCfgS(&hsdac_cfg);
AD5940_HSRTIACfgS(HSTIARTIA_5K);
/*Update ADC rate */
filter_cfg.ADCRate = ADCRATE_1P6MHZ;
AppBATCfg.AdcClkFreq = 32e6;
/* Change clock to 32MHz oscillator */
AD5940_HPModeEn(bTRUE);
}
/* Step 2: Adjust ADCFILTERCON and DFTCON to set optimumn SINC3, SINC2 and DFTNUM settings */
filter_cfg.ADCAvgNum = ADCAVGNUM_16; /* Don't care because it's disabled */
filter_cfg.ADCSinc2Osr = freq_params.ADCSinc2Osr;
filter_cfg.ADCSinc3Osr = freq_params.ADCSinc3Osr;
filter_cfg.BpSinc3 = bFALSE;
filter_cfg.BpNotch = bTRUE;
filter_cfg.Sinc2NotchEnable = bTRUE;
dft_cfg.DftNum = freq_params.DftNum;
dft_cfg.DftSrc = freq_params.DftSrc;
dft_cfg.HanWinEn = AppBATCfg.HanWinEn;
AD5940_ADCFilterCfgS(&filter_cfg);
AD5940_DFTCfgS(&dft_cfg);
/* Step 3: Calculate clocks needed to get result to FIFO and update sequencer wait command */
clks_cal.DataType = DATATYPE_DFT;
clks_cal.DftSrc = freq_params.DftSrc;
clks_cal.DataCount = 1L<<(freq_params.DftNum+2); /* 2^(DFTNUMBER+2) */
clks_cal.ADCSinc2Osr = freq_params.ADCSinc2Osr;
clks_cal.ADCSinc3Osr = freq_params.ADCSinc3Osr;
clks_cal.ADCAvgNum = 0;
clks_cal.RatioSys2AdcClk = AppBATCfg.SysClkFreq/AppBATCfg.AdcClkFreq;
AD5940_ClksCalculate(&clks_cal, &WaitClks);
SRAMAddr = AppBATCfg.MeasureSeqInfo.SeqRamAddr + AppBATCfg.SeqWaitAddr[0];
SeqCmdBuff[0] =SEQ_WAIT(WaitClks/2);
SeqCmdBuff[1] =SEQ_WAIT(WaitClks/2);
AD5940_SEQCmdWrite(SRAMAddr, SeqCmdBuff, 2);
return AD5940ERR_OK;
}
/*AD5940Main.c*/
#include "ad5940.h"
#include <stdio.h>
#include "string.h"
#include "math.h"
#include "BATImpedance.h"
#define APPBUFF_SIZE 512
uint32_t AppBuff[APPBUFF_SIZE];
/* It's your choice here how to do with the data. Here is just an example to print them to UART */
int32_t BATShowResult(uint32_t *pData, uint32_t DataCount)
{
fImpCar_Type *pImp = (fImpCar_Type*)pData;
float freq;
AppBATCtrl(BATCTRL_GETFREQ, &freq);
/*Process data*/
for(int i=0;i<DataCount;i++)
{
printf("Freq: %f (real, image) = ,%f , %f ,mOhm \n",freq, pImp[i].Real,pImp[i].Image);
}
return 0;
}
/* Initialize AD5940 basic blocks like clock */
static int32_t AD5940PlatformCfg(void)
{
CLKCfg_Type clk_cfg;
FIFOCfg_Type fifo_cfg;
AGPIOCfg_Type gpio_cfg;
/* Use hardware reset */
AD5940_HWReset();
/* Platform configuration */
AD5940_Initialize();
/* Step1. Configure clock */
clk_cfg.ADCClkDiv = ADCCLKDIV_1;
clk_cfg.ADCCLkSrc = ADCCLKSRC_HFOSC;
clk_cfg.SysClkDiv = SYSCLKDIV_1;
clk_cfg.SysClkSrc = SYSCLKSRC_HFOSC; //on battery board, there is a 32MHz crystal.
clk_cfg.HfOSC32MHzMode = bFALSE;
clk_cfg.HFOSCEn = bTRUE;
clk_cfg.HFXTALEn = bFALSE;
clk_cfg.LFOSCEn = bTRUE;
AD5940_CLKCfg(&clk_cfg);
/* Step2. Configure FIFO and Sequencer*/
fifo_cfg.FIFOEn = bFALSE;
fifo_cfg.FIFOMode = FIFOMODE_FIFO;
fifo_cfg.FIFOSize = FIFOSIZE_4KB; /* 4kB for FIFO, The reset 2kB for sequencer */
fifo_cfg.FIFOSrc = FIFOSRC_DFT;
fifo_cfg.FIFOThresh = 4;//AppBATCfg.FifoThresh; /* DFT result. One pair for RCAL, another for Rz. One DFT result have real part and imaginary part */
AD5940_FIFOCfg(&fifo_cfg); /* Disable to reset FIFO. */
fifo_cfg.FIFOEn = bTRUE;
AD5940_FIFOCfg(&fifo_cfg); /* Enable FIFO here */
/* Step3. Interrupt controller */
AD5940_INTCCfg(AFEINTC_1, AFEINTSRC_ALLINT, bTRUE); /* Enable all interrupt in Interrupt Controller 1, so we can check INTC flags */
AD5940_INTCCfg(AFEINTC_0, AFEINTSRC_DATAFIFOTHRESH, bTRUE); /* Interrupt Controller 0 will control GP0 to generate interrupt to MCU */
AD5940_INTCClrFlag(AFEINTSRC_ALLINT);
/* Step4: Reconfigure GPIO */
gpio_cfg.FuncSet = GP0_INT|GP2_SYNC;
gpio_cfg.InputEnSet = AGPIO_Pin2;
gpio_cfg.OutputEnSet = AGPIO_Pin0|AGPIO_Pin2;
gpio_cfg.OutVal = 0;
gpio_cfg.PullEnSet = 0;
AD5940_AGPIOCfg(&gpio_cfg);
AD5940_SleepKeyCtrlS(SLPKEY_UNLOCK); /* Allow AFE to enter sleep mode. */
return 0;
}
void AD5940BATStructInit(void)
{
AppBATCfg_Type *pBATCfg;
AppBATGetCfg(&pBATCfg);
pBATCfg->SeqStartAddr = 0;
pBATCfg->MaxSeqLen = 512;
pBATCfg->RcalVal = 50.0; /* Value of RCAL on EVAL-AD5941BATZ board is 50mOhm */
pBATCfg->ACVoltPP = 300.0f; /* Pk-pk amplitude is 300mV */
pBATCfg->DCVolt = 1200.0f; /* Offset voltage of 1.2V*/
pBATCfg->DftNum = DFTNUM_8192;
pBATCfg->FifoThresh = 2; /* 2 results in FIFO, real and imaginary part. */
pBATCfg->SinFreq = 200; /* Sin wave frequency. THis value has no effect if sweep is enabled */
pBATCfg->SweepCfg.SweepEn = bTRUE; /* Set to bTRUE to enable sweep function */
pBATCfg->SweepCfg.SweepStart = 1.0f; /* Start sweep at 1Hz */
pBATCfg->SweepCfg.SweepStop = 50000.0f; /* Finish sweep at 1000Hz */
pBATCfg->SweepCfg.SweepPoints = 50; /* 100 frequencies in the sweep */
pBATCfg->SweepCfg.SweepLog = bTRUE; /* Set to bTRUE to use LOG scale. Set bFALSE to use linear scale */
}
void AD5940_Main(void)
{
uint32_t temp;
AD5940PlatformCfg();
AD5940BATStructInit(); /* Configure your parameters in this function */
AppBATInit(AppBuff, APPBUFF_SIZE); /* Initialize BAT application. Provide a buffer, which is used to store sequencer commands */
AppBATCtrl(BATCTRL_MRCAL, 0); /* Measur RCAL each point in sweep */
AppBATCtrl(BATCTRL_START, 0);
while(1)
{
/* Check if interrupt flag which will be set when interrupt occurred. */
if(AD5940_GetMCUIntFlag())
{
AD5940_ClrMCUIntFlag(); /* Clear this flag */
temp = APPBUFF_SIZE;
AppBATISR(AppBuff, &temp); /* Deal with it and provide a buffer to store data we got */
AD5940_Delay10us(100000);
BATShowResult(AppBuff, temp); /* Print measurement results over UART */
AD5940_SEQMmrTrig(SEQID_0); /* Trigger next measurement ussing MMR write*/
}
}
}
#ifndef _BAT_IMPEDANCE_H_
#define _BAT_IMPEDANCE_H_
#include "ad5940.h"
#include "stdio.h"
#include "string.h"
#include "math.h"
#define PRECHARGE_WAIT_MS 4000 //precharge time in ms.
#define PRECHARGE_CH1 1
#define PRECHARGE_CH2 2
#define PRECHARGE_CH3 3
#define PRECHARGE_RCAL PRECHARGE_CH1
#define PRECHARGE_BAT PRECHARGE_CH2
#define PRECHARGE_AMP PRECHARGE_CH3
/*
Note: this example will use SEQID_0 as measurement sequence, and use SEQID_1 as init sequence.
SEQID_3 is used for calibration.
*/
#define STATE_IDLE 0 /**< Initial state. */
#define STATE_RCAL 1 /**< Measure Rcal response voltage. */
#define STATE_BATTERY 2 /**< Measure battery response voltage. */
typedef struct
{
/* Common configurations for all kinds of Application. */
uint32_t state; /* 0: Init, 1: measure Rcal, 2: Measure Battery. */
BoolFlag bParaChanged; /* Indicate to generate sequence again. It's auto cleared by AppBATInit */
BoolFlag bDoCal; /* Need to do calibration. */
uint32_t SeqStartAddr; /* Initialaztion sequence start address in SRAM of AD5940 */
uint32_t MaxSeqLen; /* Limit the maximum sequence. */
uint32_t SeqStartAddrCal; /* Measurement sequence start address in SRAM of AD5940 */
uint32_t MaxSeqLenCal;
/* Application related parameters */
float SysClkFreq; /* The real frequency of system clock */
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 */
float AdcClkFreq; /* The real frequency of ADC clock */
uint32_t FifoThresh; /* FIFO threshold. Should be N*4 */
float BatODR; /* in Hz. ODR decides the period of WakeupTimer who will trigger sequencer periodically. DFT number and sample frequency decides the maxim ODR. */
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. */
uint32_t PwrMod; /* Control Chip power mode(LP/HP) */
float ACVoltPP; /* Final AC excitation voltage on pin AIN1 in mV peak to peak unit. */
float DCVolt; /* The DC bias voltage on AIN1 pin. Unit is mV. */
float RcalVal; /* Rcal value in mOhm */
float SinFreq; /* Frequency of excitation signal */
uint8_t ADCSinc3Osr; /* SINC3 OSR selection. ADCSINC3OSR_2, ADCSINC3OSR_4 */
uint8_t ADCSinc2Osr; /* SINC2 OSR selection. ADCSINC2OSR_22...ADCSINC2OSR_1333 */
uint32_t DftNum; /* DFT number */
uint32_t DftSrc; /* DFT Source */
BoolFlag HanWinEn; /* Enable Hanning window */
uint32_t SeqWaitAddr[3];
/* Sweep Function Control */
SoftSweepCfg_Type SweepCfg;
/* Private variables for internal usage */
float SweepCurrFreq;
float SweepNextFreq;
float FreqofData;
BoolFlag BATInited; /* If the program run firstly, generated sequence commands */
SEQInfo_Type InitSeqInfo;
SEQInfo_Type MeasureSeqInfo;
BoolFlag StopRequired; /* After FIFO is ready, stop the measurement sequence */
uint32_t FifoDataCount; /* Count how many times impedance have been measured */
uint32_t MeasSeqCycleCount; /* How long the measurement sequence will take */
float MaxODR; /* Max ODR for sampling in this config */
fImpCar_Type RcalVolt; /* The measured Rcal resistor(R1) response voltage. */
float RcalVoltTable[100][2];
/* End */
}AppBATCfg_Type;
#define BATCTRL_START 0
#define BATCTRL_STOPNOW 1
#define BATCTRL_STOPSYNC 2
#define BATCTRL_SHUTDOWN 4 /* Note: shutdown here means turn off everything and put AFE to hibernate mode. The word 'SHUT DOWN' is only used here. */
#define BATCTRL_MRCAL 5 /* Measure RCAL response voltage */
#define BATCTRL_GETFREQ 6
AD5940Err AppBATGetCfg(void *pCfg);
AD5940Err AppBATInit(uint32_t *pBuffer, uint32_t BufferSize);
AD5940Err AppBATISR(void *pBuff, uint32_t *pCount);
AD5940Err AppBATCtrl(int32_t BatCtrl, void *pPara);
AD5940Err AppBATCheckFreq(float freq);
AD5940Err AppBATMeasureRCAL(void);
#endifHi,
Could you please check with the below code:
/*BATImpedance.c*/
#include "BATImpedance.h"
/*
Application configuration structure. Specified by user from template.
The variables are usable in this whole application.
It includes basic configuration for sequencer generator and application related parameters
*/
AppBATCfg_Type AppBATCfg =
{
.state = STATE_IDLE,
.bParaChanged = bFALSE,
.SeqStartAddr = 0,
.MaxSeqLen = 0,
.SeqStartAddrCal = 0,
.MaxSeqLenCal = 0,
.SysClkFreq = 16000000.0,
.WuptClkFreq = 32000.0,
.AdcClkFreq = 16000000.0,
.BatODR = 20.0, /* 20.0 Hz*/
.NumOfData = -1,
.PwrMod = AFEPWR_LP,
.ACVoltPP = 800.0,
.DCVolt = 1100.0f,
.SinFreq = 50000.0, /* 50kHz */
.RcalVal = 50.0, /* 50mOhm */
.ADCSinc3Osr = ADCSINC3OSR_4,
.ADCSinc2Osr = ADCSINC2OSR_22,
.DftNum = DFTNUM_16384,
.DftSrc = DFTSRC_SINC3,
.HanWinEn = bTRUE,
.FifoThresh = 4,
.BATInited = bFALSE,
.StopRequired = bFALSE,
.MeasSeqCycleCount = 0,
.SweepCfg.SweepEn = bTRUE,
.SweepCfg.SweepStart = 1000,
.SweepCfg.SweepStop = 100000.0,
.SweepCfg.SweepPoints = 101,
.SweepCfg.SweepLog = bFALSE,
.SweepCfg.SweepIndex = 0,
};
/**
This function is provided for upper controllers that want to change
application parameters specially for user defined parameters.
*/
AD5940Err AppBATGetCfg(void *pCfg)
{
if(pCfg){
*(AppBATCfg_Type**)pCfg = &AppBATCfg;
return AD5940ERR_OK;
}
return AD5940ERR_PARA;
}
static void PreCharge(unsigned char channel)
{
void Arduino_WriteDn(uint32_t Dn, BoolFlag bHigh);
switch(channel)
{
case PRECHARGE_CH1: //00
Arduino_WriteDn(1<<3, bFALSE); //d3
Arduino_WriteDn(1<<4, bFALSE); //d4
break;
case PRECHARGE_CH2: //01
Arduino_WriteDn(1<<3, bTRUE);
Arduino_WriteDn(1<<4, bFALSE);
break;
case PRECHARGE_CH3://10
Arduino_WriteDn(1<<3, bFALSE);
Arduino_WriteDn(1<<4, bTRUE);
break;
default:
break;
}
AD5940_Delay10us(PRECHARGE_WAIT_MS*100);
Arduino_WriteDn(1<<3, bTRUE); //d3
Arduino_WriteDn(1<<4, bTRUE); //d4
}
AD5940Err AppBATCtrl(int32_t BatCtrl, void *pPara)
{
switch (BatCtrl)
{
case BATCTRL_START:
{
if(AD5940_WakeUp(10) > 10) /* Wakeup AFE by read register, read 10 times at most */
return AD5940ERR_WAKEUP; /* Wakeup Failed */
if(AppBATCfg.BATInited == bFALSE)
return AD5940ERR_APPERROR;
AD5940_WriteReg(REG_AFE_SWMUX, 1<<0); /* control ADG636 to measure battery */
AD5940_WriteReg(REG_AFE_SYNCEXTDEVICE, 0x0);
PreCharge(PRECHARGE_BAT);
PreCharge(PRECHARGE_AMP);
AD5940_FIFOCtrlS(FIFOSRC_DFT, bFALSE);
AD5940_FIFOThrshSet(AppBATCfg.FifoThresh); /* DFT result contains both real and image. */
AD5940_FIFOCtrlS(FIFOSRC_DFT, bTRUE);
AppBATCfg.state = STATE_BATTERY;
/* Trigger sequence using MMR write */
AD5940_SEQMmrTrig(SEQID_0);
AppBATCfg.FifoDataCount = 0; /* restart */
break;
}
case BATCTRL_STOPNOW:
{
if(AD5940_WakeUp(10) > 10) /* Wakeup AFE by read register, read 10 times at most */
return AD5940ERR_WAKEUP; /* Wakeup Failed */
/* Start Wupt right now */
AD5940_WUPTCtrl(bFALSE);
/* There is chance this operation will fail because sequencer could put AFE back
to hibernate mode just after waking up. Use STOPSYNC is better. */
AD5940_WUPTCtrl(bFALSE);
break;
}
case BATCTRL_STOPSYNC:
{
AppBATCfg.StopRequired = bTRUE;
break;
}
case BATCTRL_GETFREQ:
if(pPara)
{
if(AppBATCfg.SweepCfg.SweepEn == bTRUE)
*(float*)pPara = AppBATCfg.FreqofData;
else
*(float*)pPara = AppBATCfg.SinFreq;
}
break;
case BATCTRL_SHUTDOWN:
{
AppBATCtrl(BATCTRL_STOPNOW, 0); /* Stop the measurement if it's running. */
/* Turn off LPloop related blocks which are not controlled automatically by sleep operation */
AFERefCfg_Type aferef_cfg;
LPLoopCfg_Type lp_loop;
memset(&aferef_cfg, 0, sizeof(aferef_cfg));
AD5940_REFCfgS(&aferef_cfg);
memset(&lp_loop, 0, sizeof(lp_loop));
AD5940_LPLoopCfgS(&lp_loop);
AD5940_EnterSleepS(); /* Enter Hibernate */
}
break;
case BATCTRL_MRCAL:
if(AD5940_WakeUp(10) > 10)
return AD5940ERR_WAKEUP;
//Settle input RC filter.
AD5940_WriteReg(REG_AFE_SWMUX, 0); //control ADG636 to measure rcal
AD5940_WriteReg(REG_AFE_SYNCEXTDEVICE, 0x4);
PreCharge(PRECHARGE_RCAL);
PreCharge(PRECHARGE_AMP);
AD5940_FIFOCtrlS(FIFOSRC_DFT, bFALSE);
AD5940_FIFOThrshSet(2);
AD5940_FIFOCtrlS(FIFOSRC_DFT, bTRUE); //enable FIFO
AppBATMeasureRCAL();
break;
default:
break;
}
return AD5940ERR_OK;
}
/* Generate init sequence */
static AD5940Err AppBATSeqCfgGen(void)
{
AD5940Err error = AD5940ERR_OK;
uint32_t const *pSeqCmd;
uint32_t SeqLen;
AFERefCfg_Type aferef_cfg;
HSLoopCfg_Type hs_loop;
LPLoopCfg_Type lp_loop;
DSPCfg_Type dsp_cfg;
float sin_freq;
/* Start sequence generator here */
AD5940_SEQGenCtrl(bTRUE);
AD5940_AFECtrlS(AFECTRL_ALL, bFALSE); /* Disable all firstly. */
aferef_cfg.HpBandgapEn = bTRUE;
aferef_cfg.Hp1V1BuffEn = bTRUE;
aferef_cfg.Hp1V8BuffEn = bTRUE;
aferef_cfg.Disc1V1Cap = bFALSE;
aferef_cfg.Disc1V8Cap = bFALSE;
aferef_cfg.Hp1V8ThemBuff = bFALSE;
aferef_cfg.Hp1V8Ilimit = bFALSE;
aferef_cfg.Lp1V1BuffEn = bFALSE;
aferef_cfg.Lp1V8BuffEn = bFALSE;
/* LP reference control, Use LP loop to provide DC Bias voltage. */
aferef_cfg.LpBandgapEn = bTRUE;
aferef_cfg.LpRefBufEn = bTRUE;
aferef_cfg.LpRefBoostEn = bFALSE;
AD5940_REFCfgS(&aferef_cfg);
/* Determine buffer gain according to ACVoltPP */
hs_loop.HsDacCfg.ExcitBufGain = EXCITBUFGAIN_2;
hs_loop.HsDacCfg.HsDacGain = HSDACGAIN_1;
hs_loop.HsDacCfg.HsDacUpdateRate = 0x1B; //the maximum update rate is 16MHz/7
hs_loop.HsTiaCfg.DiodeClose = bFALSE;
hs_loop.HsTiaCfg.HstiaBias = HSTIABIAS_1P1;
hs_loop.HsTiaCfg.HstiaCtia = 31; //HSTIA is not used.
hs_loop.HsTiaCfg.HstiaDeRload = HSTIADERLOAD_OPEN;
hs_loop.HsTiaCfg.HstiaDeRtia = HSTIADERTIA_OPEN;
hs_loop.HsTiaCfg.HstiaRtiaSel = HSTIARTIA_10K;
hs_loop.SWMatCfg.Dswitch = SWD_CE0;
hs_loop.SWMatCfg.Pswitch = SWP_AIN1;
hs_loop.SWMatCfg.Nswitch = SWN_AIN0; //AIN0 is connected to AIN4 externally by JP3.
hs_loop.SWMatCfg.Tswitch = 0; //T switch is not used.
hs_loop.WgCfg.WgType = WGTYPE_SIN;
hs_loop.WgCfg.GainCalEn = bFALSE;
hs_loop.WgCfg.OffsetCalEn = bFALSE;
if(AppBATCfg.SweepCfg.SweepEn == bTRUE)
{
AppBATCfg.FreqofData = AppBATCfg.SweepCfg.SweepStart;
AppBATCfg.SweepCurrFreq = AppBATCfg.SweepCfg.SweepStart;
AD5940_SweepNext(&AppBATCfg.SweepCfg, &AppBATCfg.SweepNextFreq);
sin_freq = AppBATCfg.SweepCurrFreq;
}
else
{
sin_freq = AppBATCfg.SinFreq;
AppBATCfg.FreqofData = sin_freq;
}
hs_loop.WgCfg.SinCfg.SinFreqWord = AD5940_WGFreqWordCal(sin_freq, AppBATCfg.SysClkFreq);
hs_loop.WgCfg.SinCfg.SinAmplitudeWord = (uint32_t)(AppBATCfg.ACVoltPP/800.0f*2047 + 0.5f);
hs_loop.WgCfg.SinCfg.SinOffsetWord = 0;
hs_loop.WgCfg.SinCfg.SinPhaseWord = 0;
AD5940_HSLoopCfgS(&hs_loop);
//Use LP loop to output bias voltage on AIN4 pin, which provides voltage on AIN0(N switch).
lp_loop.LpDacCfg.LpdacSel = LPDAC0;
lp_loop.LpDacCfg.LpDacSrc = LPDACSRC_MMR;
lp_loop.LpDacCfg.LpDacSW = LPDACSW_VZERO2LPTIA|LPDACSW_VZERO2PIN;
lp_loop.LpDacCfg.LpDacVzeroMux = LPDACVZERO_12BIT;
lp_loop.LpDacCfg.LpDacVbiasMux = LPDACVBIAS_6BIT;
lp_loop.LpDacCfg.LpDacRef = LPDACREF_2P5;
lp_loop.LpDacCfg.DataRst = bFALSE;
lp_loop.LpDacCfg.PowerEn = bTRUE;
lp_loop.LpDacCfg.DacData12Bit = (uint32_t)((AppBATCfg.DCVolt-200)/2200.0f*4095);
lp_loop.LpDacCfg.DacData6Bit = 31; //not used. Set it to middle value.
lp_loop.LpAmpCfg.LpAmpSel = LPAMP0;
lp_loop.LpAmpCfg.LpAmpPwrMod = LPAMPPWR_NORM;
lp_loop.LpAmpCfg.LpPaPwrEn = bFALSE;
lp_loop.LpAmpCfg.LpTiaPwrEn = bTRUE;
lp_loop.LpAmpCfg.LpTiaRf = LPTIARF_20K; //External cap is 1uF.
lp_loop.LpAmpCfg.LpTiaRload = LPTIARLOAD_SHORT;
lp_loop.LpAmpCfg.LpTiaRtia = LPTIARTIA_OPEN;
lp_loop.LpAmpCfg.LpTiaSW = LPTIASW(7)|LPTIASW(5)|LPTIASW(9);
AD5940_LPLoopCfgS(&lp_loop);
dsp_cfg.ADCBaseCfg.ADCMuxN = ADCMUXN_AIN2;
dsp_cfg.ADCBaseCfg.ADCMuxP = ADCMUXP_AIN3;
dsp_cfg.ADCBaseCfg.ADCPga = ADCPGA_1P5;
memset(&dsp_cfg.ADCDigCompCfg, 0, sizeof(dsp_cfg.ADCDigCompCfg));
dsp_cfg.ADCFilterCfg.ADCAvgNum = ADCAVGNUM_16; /* Don't care because it's disabled */
dsp_cfg.ADCFilterCfg.ADCRate = ADCRATE_800KHZ;
dsp_cfg.ADCFilterCfg.ADCSinc2Osr = AppBATCfg.ADCSinc2Osr;
dsp_cfg.ADCFilterCfg.ADCSinc3Osr = AppBATCfg.ADCSinc3Osr;
dsp_cfg.ADCFilterCfg.BpSinc3 = bFALSE;
dsp_cfg.ADCFilterCfg.BpNotch = bTRUE;
dsp_cfg.ADCFilterCfg.Sinc2NotchEnable = bTRUE;
dsp_cfg.DftCfg.DftNum = AppBATCfg.DftNum;
dsp_cfg.DftCfg.DftSrc = AppBATCfg.DftSrc;
dsp_cfg.DftCfg.HanWinEn = AppBATCfg.HanWinEn;
memset(&dsp_cfg.StatCfg, 0, sizeof(dsp_cfg.StatCfg)); /* Don't care about Statistic */
AD5940_DSPCfgS(&dsp_cfg);
/* Enable all of them. They are automatically turned off during hibernate mode to save power */
AD5940_AFECtrlS(AFECTRL_HPREFPWR|AFECTRL_INAMPPWR|AFECTRL_EXTBUFPWR|\
AFECTRL_WG|AFECTRL_DACREFPWR|AFECTRL_HSDACPWR|\
AFECTRL_SINC2NOTCH, bTRUE);
/* Sequence end. */
AD5940_SEQGenInsert(SEQ_STOP()); /* Add one external command to disable sequencer for initialization sequence because we only want it to run one time. */
/* Stop here */
error = AD5940_SEQGenFetchSeq(&pSeqCmd, &SeqLen);
AD5940_SEQGenCtrl(bFALSE); /* Stop sequencer generator */
if(error == AD5940ERR_OK)
{
AppBATCfg.InitSeqInfo.SeqId = SEQID_1;
AppBATCfg.InitSeqInfo.SeqRamAddr = AppBATCfg.SeqStartAddr;
AppBATCfg.InitSeqInfo.pSeqCmd = pSeqCmd;
AppBATCfg.InitSeqInfo.SeqLen = SeqLen;
/* Write command to SRAM */
AD5940_SEQCmdWrite(AppBATCfg.InitSeqInfo.SeqRamAddr, pSeqCmd, SeqLen);
}
else
return error; /* Error */
return AD5940ERR_OK;
}
//the sequence used to measure battery response voltage.
static AD5940Err AppBATSeqMeasureGen(void)
{
AD5940Err error = AD5940ERR_OK;
uint32_t const *pSeqCmd;
uint32_t SeqLen;
uint32_t WaitClks;
ClksCalInfo_Type clks_cal;
clks_cal.DataType = DATATYPE_DFT;
clks_cal.DftSrc = AppBATCfg.DftSrc;
clks_cal.DataCount = 1L<<(AppBATCfg.DftNum+2); /* 2^(DFTNUMBER+2) */
clks_cal.ADCSinc2Osr = AppBATCfg.ADCSinc2Osr;
clks_cal.ADCSinc3Osr = AppBATCfg.ADCSinc3Osr;
clks_cal.ADCAvgNum = 0;
clks_cal.RatioSys2AdcClk = AppBATCfg.SysClkFreq/AppBATCfg.AdcClkFreq;
AD5940_ClksCalculate(&clks_cal, &WaitClks);
/* Start sequence generator here */
AD5940_SEQGenCtrl(bTRUE);
AD5940_SEQGenInsert(SEQ_WAIT(16*250)); /* wait 250us for reference power up from hibernate mode. */
AD5940_AFECtrlS(AFECTRL_WG|AFECTRL_ADCPWR|AFECTRL_SINC2NOTCH, bTRUE); /* Enable Waveform generator, ADC power */
AD5940_SEQGenInsert(SEQ_WAIT(16*50)); /* Wait for ADC ready. */
AD5940_AFECtrlS(AFECTRL_ADCCNV|AFECTRL_DFT, bTRUE); /* Start ADC convert and DFT */
AD5940_SEQGenFetchSeq(NULL, &AppBATCfg.SeqWaitAddr[0]); /* Record the start address of the next command. */
AD5940_SEQGenInsert(SEQ_WAIT(WaitClks/2));
AD5940_SEQGenInsert(SEQ_WAIT(WaitClks/2));
AD5940_AFECtrlS(AFECTRL_ADCCNV|AFECTRL_DFT/*|AFECTRL_WG*/|AFECTRL_ADCPWR|AFECTRL_SINC2NOTCH, bFALSE); /* Stop ADC convert and DFT */
//AD5940_EnterSleepS();/* Goto hibernate */
/* Sequence end. */
error = AD5940_SEQGenFetchSeq(&pSeqCmd, &SeqLen);
AD5940_SEQGenCtrl(bFALSE); /* Stop sequencer generator */
AppBATCfg.MeasSeqCycleCount = AD5940_SEQCycleTime();
AppBATCfg.MaxODR = 1/(((AppBATCfg.MeasSeqCycleCount + 10) / 16.0)* 1E-6) ;
if(AppBATCfg.BatODR > AppBATCfg.MaxODR)
{
/* We have requested a sampling rate that cannot be achieved with the time it
takes to acquire a sample.
*/
AppBATCfg.BatODR = AppBATCfg.MaxODR;
}
if(error == AD5940ERR_OK)
{
AppBATCfg.MeasureSeqInfo.SeqId = SEQID_0;
AppBATCfg.MeasureSeqInfo.SeqRamAddr = AppBATCfg.InitSeqInfo.SeqRamAddr + AppBATCfg.InitSeqInfo.SeqLen ;
AppBATCfg.MeasureSeqInfo.pSeqCmd = pSeqCmd;
AppBATCfg.MeasureSeqInfo.SeqLen = SeqLen;
/* Write command to SRAM */
AD5940_SEQCmdWrite(AppBATCfg.MeasureSeqInfo.SeqRamAddr, pSeqCmd, SeqLen);
}
else
return error; /* Error */
return AD5940ERR_OK;
}
/* This function provide application initialize. */
AD5940Err AppBATInit(uint32_t *pBuffer, uint32_t BufferSize)
{
AD5940Err error = AD5940ERR_OK;
SEQCfg_Type seq_cfg;
FIFOCfg_Type fifo_cfg;
if(AD5940_WakeUp(10) > 10) /* Wakeup AFE by read register, read 10 times at most */
return AD5940ERR_WAKEUP; /* Wakeup Failed */
/* Configure sequencer and stop it */
seq_cfg.SeqMemSize = SEQMEMSIZE_2KB; /* 2kB SRAM is used for sequencer, others for data FIFO */
seq_cfg.SeqBreakEn = bFALSE;
seq_cfg.SeqIgnoreEn = bFALSE;
seq_cfg.SeqCntCRCClr = bTRUE;
seq_cfg.SeqEnable = bFALSE;
seq_cfg.SeqWrTimer = 0;
AD5940_SEQCfg(&seq_cfg);
/* Reconfigure FIFO */
AD5940_FIFOCtrlS(FIFOSRC_DFT, bFALSE); /* Disable FIFO firstly */
fifo_cfg.FIFOEn = bTRUE;
fifo_cfg.FIFOMode = FIFOMODE_FIFO;
fifo_cfg.FIFOSize = FIFOSIZE_4KB; /* 4kB for FIFO, The reset 2kB for sequencer */
fifo_cfg.FIFOSrc = FIFOSRC_DFT;
fifo_cfg.FIFOThresh = AppBATCfg.FifoThresh; /* DFT result. One pair for RCAL, another for Rz. One DFT result have real part and imaginary part */
AD5940_FIFOCfg(&fifo_cfg);
AD5940_INTCClrFlag(AFEINTSRC_ALLINT);
/* Start sequence generator */
/* Initialize sequencer generator */
if((AppBATCfg.BATInited == bFALSE)||\
(AppBATCfg.bParaChanged == bTRUE))
{
if(pBuffer == 0) return AD5940ERR_PARA;
if(BufferSize == 0) return AD5940ERR_PARA;
AD5940_SEQGenInit(pBuffer, BufferSize);
/* Generate initialize sequence */
error = AppBATSeqCfgGen(); /* Application initialization sequence using either MCU or sequencer */
if(error != AD5940ERR_OK) return error;
/* Generate measurement sequence */
error = AppBATSeqMeasureGen();
if(error != AD5940ERR_OK) return error;
AppBATCfg.bParaChanged = bFALSE; /* Clear this flag as we already implemented the new configuration */
}
/* Initialization sequencer */
AppBATCfg.InitSeqInfo.WriteSRAM = bFALSE;
AD5940_SEQInfoCfg(&AppBATCfg.InitSeqInfo);
seq_cfg.SeqEnable = bTRUE;
AD5940_SEQCfg(&seq_cfg); /* Enable sequencer */
AD5940_SEQMmrTrig(AppBATCfg.InitSeqInfo.SeqId);
while(AD5940_INTCTestFlag(AFEINTC_1, AFEINTSRC_ENDSEQ) == bFALSE);
AppBATCheckFreq(AppBATCfg.SweepCfg.SweepStart);
/* Measurement sequence */
AppBATCfg.MeasureSeqInfo.WriteSRAM = bFALSE;
AD5940_SEQInfoCfg(&AppBATCfg.MeasureSeqInfo);
seq_cfg.SeqEnable = bTRUE;
AD5940_SEQCfg(&seq_cfg); /* Enable sequencer, and wait for trigger */
AD5940_ClrMCUIntFlag(); /* Clear interrupt flag generated before */
AD5940_AFEPwrBW(AppBATCfg.PwrMod, AFEBW_250KHZ);
AD5940_WriteReg(REG_AFE_SWMUX, 1<<1);
AppBATCfg.BATInited = bTRUE; /* BAT application has been initialized. */
return AD5940ERR_OK;
}
/* Depending on frequency of Sin wave set optimum filter settings */
AD5940Err AppBATCheckFreq(float freq)
{
ADCFilterCfg_Type filter_cfg;
DFTCfg_Type dft_cfg;
HSDACCfg_Type hsdac_cfg;
uint32_t WaitClks;
ClksCalInfo_Type clks_cal;
FreqParams_Type freq_params;
uint32_t SeqCmdBuff[32];
uint32_t SRAMAddr = 0;;
/* Step 1: Check Frequency */
freq_params = AD5940_GetFreqParameters(freq);
if(freq < 0.51)
{
hsdac_cfg.ExcitBufGain = EXCITBUFGAIN_2;
hsdac_cfg.HsDacGain = HSDACGAIN_1;
hsdac_cfg.HsDacUpdateRate = 0x1B;
AD5940_HSDacCfgS(&hsdac_cfg);
AD5940_HSRTIACfgS(HSTIARTIA_40K);
/*Update ADC rate */
filter_cfg.ADCRate = ADCRATE_800KHZ;
AppBATCfg.AdcClkFreq = 16e6;
/* Change clock to 16MHz oscillator */
AD5940_HPModeEn(bFALSE);
}
else if(freq < 5 )
{
hsdac_cfg.ExcitBufGain = EXCITBUFGAIN_2;
hsdac_cfg.HsDacGain = HSDACGAIN_1;
hsdac_cfg.HsDacUpdateRate = 0x1B;
AD5940_HSDacCfgS(&hsdac_cfg);
AD5940_HSRTIACfgS(HSTIARTIA_40K);
/*Update ADC rate */
filter_cfg.ADCRate = ADCRATE_800KHZ;
AppBATCfg.AdcClkFreq = 16e6;
/* Change clock to 16MHz oscillator */
AD5940_HPModeEn(bFALSE);
}else if(freq < 450)
{
hsdac_cfg.ExcitBufGain = EXCITBUFGAIN_2;
hsdac_cfg.HsDacGain = HSDACGAIN_1;
hsdac_cfg.HsDacUpdateRate = 0x1B;
AD5940_HSDacCfgS(&hsdac_cfg);
AD5940_HSRTIACfgS(HSTIARTIA_5K);
/*Update ADC rate */
filter_cfg.ADCRate = ADCRATE_800KHZ;
AppBATCfg.AdcClkFreq = 16e6;
/* Change clock to 16MHz oscillator */
AD5940_HPModeEn(bFALSE);
}
else if(freq<80000)
{
hsdac_cfg.ExcitBufGain = EXCITBUFGAIN_2;
hsdac_cfg.HsDacGain = HSDACGAIN_1;
hsdac_cfg.HsDacUpdateRate = 0x1B;
AD5940_HSDacCfgS(&hsdac_cfg);
AD5940_HSRTIACfgS(HSTIARTIA_5K);
/*Update ADC rate */
filter_cfg.ADCRate = ADCRATE_800KHZ;
AppBATCfg.AdcClkFreq = 16e6;
/* Change clock to 16MHz oscillator */
AD5940_HPModeEn(bFALSE);
}
/* High power mode */
if(freq >= 80000)
{
hsdac_cfg.ExcitBufGain = EXCITBUFGAIN_2;
hsdac_cfg.HsDacGain = HSDACGAIN_1;
hsdac_cfg.HsDacUpdateRate = 0x07;
AD5940_HSDacCfgS(&hsdac_cfg);
AD5940_HSRTIACfgS(HSTIARTIA_5K);
/*Update ADC rate */
filter_cfg.ADCRate = ADCRATE_1P6MHZ;
AppBATCfg.AdcClkFreq = 32e6;
/* Change clock to 32MHz oscillator */
AD5940_HPModeEn(bTRUE);
}
/* Step 2: Adjust ADCFILTERCON and DFTCON to set optimumn SINC3, SINC2 and DFTNUM settings */
filter_cfg.ADCAvgNum = ADCAVGNUM_16; /* Don't care because it's disabled */
filter_cfg.ADCSinc2Osr = freq_params.ADCSinc2Osr;
filter_cfg.ADCSinc3Osr = freq_params.ADCSinc3Osr;
filter_cfg.BpSinc3 = bFALSE;
filter_cfg.BpNotch = bTRUE;
filter_cfg.Sinc2NotchEnable = bTRUE;
dft_cfg.DftNum = freq_params.DftNum;
dft_cfg.DftSrc = freq_params.DftSrc;
dft_cfg.HanWinEn = AppBATCfg.HanWinEn;
AD5940_ADCFilterCfgS(&filter_cfg);
AD5940_DFTCfgS(&dft_cfg);
/* Step 3: Calculate clocks needed to get result to FIFO and update sequencer wait command */
clks_cal.DataType = DATATYPE_DFT;
clks_cal.DftSrc = freq_params.DftSrc;
clks_cal.DataCount = 1L<<(freq_params.DftNum+2); /* 2^(DFTNUMBER+2) */
clks_cal.ADCSinc2Osr = freq_params.ADCSinc2Osr;
clks_cal.ADCSinc3Osr = freq_params.ADCSinc3Osr;
clks_cal.ADCAvgNum = 0;
clks_cal.RatioSys2AdcClk = AppBATCfg.SysClkFreq/AppBATCfg.AdcClkFreq;
AD5940_ClksCalculate(&clks_cal, &WaitClks);
SRAMAddr = AppBATCfg.MeasureSeqInfo.SeqRamAddr + AppBATCfg.SeqWaitAddr[0];
SeqCmdBuff[0] =SEQ_WAIT(WaitClks/2);
SeqCmdBuff[1] =SEQ_WAIT(WaitClks/2);
AD5940_SEQCmdWrite(SRAMAddr, SeqCmdBuff, 2);
return AD5940ERR_OK;
}
/*AD5940Main.c*/
#include "ad5940.h"
#include <stdio.h>
#include "string.h"
#include "math.h"
#include "BATImpedance.h"
#define APPBUFF_SIZE 512
uint32_t AppBuff[APPBUFF_SIZE];
/* It's your choice here how to do with the data. Here is just an example to print them to UART */
int32_t BATShowResult(uint32_t *pData, uint32_t DataCount)
{
fImpCar_Type *pImp = (fImpCar_Type*)pData;
float freq;
AppBATCtrl(BATCTRL_GETFREQ, &freq);
/*Process data*/
for(int i=0;i<DataCount;i++)
{
printf("Freq: %f (real, image) = ,%f , %f ,mOhm \n",freq, pImp[i].Real,pImp[i].Image);
}
return 0;
}
/* Initialize AD5940 basic blocks like clock */
static int32_t AD5940PlatformCfg(void)
{
CLKCfg_Type clk_cfg;
FIFOCfg_Type fifo_cfg;
AGPIOCfg_Type gpio_cfg;
/* Use hardware reset */
AD5940_HWReset();
/* Platform configuration */
AD5940_Initialize();
/* Step1. Configure clock */
clk_cfg.ADCClkDiv = ADCCLKDIV_1;
clk_cfg.ADCCLkSrc = ADCCLKSRC_HFOSC;
clk_cfg.SysClkDiv = SYSCLKDIV_1;
clk_cfg.SysClkSrc = SYSCLKSRC_HFOSC; //on battery board, there is a 32MHz crystal.
clk_cfg.HfOSC32MHzMode = bFALSE;
clk_cfg.HFOSCEn = bTRUE;
clk_cfg.HFXTALEn = bFALSE;
clk_cfg.LFOSCEn = bTRUE;
AD5940_CLKCfg(&clk_cfg);
/* Step2. Configure FIFO and Sequencer*/
fifo_cfg.FIFOEn = bFALSE;
fifo_cfg.FIFOMode = FIFOMODE_FIFO;
fifo_cfg.FIFOSize = FIFOSIZE_4KB; /* 4kB for FIFO, The reset 2kB for sequencer */
fifo_cfg.FIFOSrc = FIFOSRC_DFT;
fifo_cfg.FIFOThresh = 4;//AppBATCfg.FifoThresh; /* DFT result. One pair for RCAL, another for Rz. One DFT result have real part and imaginary part */
AD5940_FIFOCfg(&fifo_cfg); /* Disable to reset FIFO. */
fifo_cfg.FIFOEn = bTRUE;
AD5940_FIFOCfg(&fifo_cfg); /* Enable FIFO here */
/* Step3. Interrupt controller */
AD5940_INTCCfg(AFEINTC_1, AFEINTSRC_ALLINT, bTRUE); /* Enable all interrupt in Interrupt Controller 1, so we can check INTC flags */
AD5940_INTCCfg(AFEINTC_0, AFEINTSRC_DATAFIFOTHRESH, bTRUE); /* Interrupt Controller 0 will control GP0 to generate interrupt to MCU */
AD5940_INTCClrFlag(AFEINTSRC_ALLINT);
/* Step4: Reconfigure GPIO */
gpio_cfg.FuncSet = GP0_INT|GP2_SYNC;
gpio_cfg.InputEnSet = AGPIO_Pin2;
gpio_cfg.OutputEnSet = AGPIO_Pin0|AGPIO_Pin2;
gpio_cfg.OutVal = 0;
gpio_cfg.PullEnSet = 0;
AD5940_AGPIOCfg(&gpio_cfg);
AD5940_SleepKeyCtrlS(SLPKEY_UNLOCK); /* Allow AFE to enter sleep mode. */
return 0;
}
void AD5940BATStructInit(void)
{
AppBATCfg_Type *pBATCfg;
AppBATGetCfg(&pBATCfg);
pBATCfg->SeqStartAddr = 0;
pBATCfg->MaxSeqLen = 512;
pBATCfg->RcalVal = 50.0; /* Value of RCAL on EVAL-AD5941BATZ board is 50mOhm */
pBATCfg->ACVoltPP = 300.0f; /* Pk-pk amplitude is 300mV */
pBATCfg->DCVolt = 1200.0f; /* Offset voltage of 1.2V*/
pBATCfg->DftNum = DFTNUM_8192;
pBATCfg->FifoThresh = 2; /* 2 results in FIFO, real and imaginary part. */
pBATCfg->SinFreq = 200; /* Sin wave frequency. THis value has no effect if sweep is enabled */
pBATCfg->SweepCfg.SweepEn = bTRUE; /* Set to bTRUE to enable sweep function */
pBATCfg->SweepCfg.SweepStart = 1.0f; /* Start sweep at 1Hz */
pBATCfg->SweepCfg.SweepStop = 50000.0f; /* Finish sweep at 1000Hz */
pBATCfg->SweepCfg.SweepPoints = 50; /* 100 frequencies in the sweep */
pBATCfg->SweepCfg.SweepLog = bTRUE; /* Set to bTRUE to use LOG scale. Set bFALSE to use linear scale */
}
void AD5940_Main(void)
{
uint32_t temp;
AD5940PlatformCfg();
AD5940BATStructInit(); /* Configure your parameters in this function */
AppBATInit(AppBuff, APPBUFF_SIZE); /* Initialize BAT application. Provide a buffer, which is used to store sequencer commands */
AppBATCtrl(BATCTRL_MRCAL, 0); /* Measur RCAL each point in sweep */
AppBATCtrl(BATCTRL_START, 0);
while(1)
{
/* Check if interrupt flag which will be set when interrupt occurred. */
if(AD5940_GetMCUIntFlag())
{
AD5940_ClrMCUIntFlag(); /* Clear this flag */
temp = APPBUFF_SIZE;
AppBATISR(AppBuff, &temp); /* Deal with it and provide a buffer to store data we got */
AD5940_Delay10us(100000);
BATShowResult(AppBuff, temp); /* Print measurement results over UART */
AD5940_SEQMmrTrig(SEQID_0); /* Trigger next measurement ussing MMR write*/
}
}
}
#ifndef _BAT_IMPEDANCE_H_
#define _BAT_IMPEDANCE_H_
#include "ad5940.h"
#include "stdio.h"
#include "string.h"
#include "math.h"
#define PRECHARGE_WAIT_MS 4000 //precharge time in ms.
#define PRECHARGE_CH1 1
#define PRECHARGE_CH2 2
#define PRECHARGE_CH3 3
#define PRECHARGE_RCAL PRECHARGE_CH1
#define PRECHARGE_BAT PRECHARGE_CH2
#define PRECHARGE_AMP PRECHARGE_CH3
/*
Note: this example will use SEQID_0 as measurement sequence, and use SEQID_1 as init sequence.
SEQID_3 is used for calibration.
*/
#define STATE_IDLE 0 /**< Initial state. */
#define STATE_RCAL 1 /**< Measure Rcal response voltage. */
#define STATE_BATTERY 2 /**< Measure battery response voltage. */
typedef struct
{
/* Common configurations for all kinds of Application. */
uint32_t state; /* 0: Init, 1: measure Rcal, 2: Measure Battery. */
BoolFlag bParaChanged; /* Indicate to generate sequence again. It's auto cleared by AppBATInit */
BoolFlag bDoCal; /* Need to do calibration. */
uint32_t SeqStartAddr; /* Initialaztion sequence start address in SRAM of AD5940 */
uint32_t MaxSeqLen; /* Limit the maximum sequence. */
uint32_t SeqStartAddrCal; /* Measurement sequence start address in SRAM of AD5940 */
uint32_t MaxSeqLenCal;
/* Application related parameters */
float SysClkFreq; /* The real frequency of system clock */
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 */
float AdcClkFreq; /* The real frequency of ADC clock */
uint32_t FifoThresh; /* FIFO threshold. Should be N*4 */
float BatODR; /* in Hz. ODR decides the period of WakeupTimer who will trigger sequencer periodically. DFT number and sample frequency decides the maxim ODR. */
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. */
uint32_t PwrMod; /* Control Chip power mode(LP/HP) */
float ACVoltPP; /* Final AC excitation voltage on pin AIN1 in mV peak to peak unit. */
float DCVolt; /* The DC bias voltage on AIN1 pin. Unit is mV. */
float RcalVal; /* Rcal value in mOhm */
float SinFreq; /* Frequency of excitation signal */
uint8_t ADCSinc3Osr; /* SINC3 OSR selection. ADCSINC3OSR_2, ADCSINC3OSR_4 */
uint8_t ADCSinc2Osr; /* SINC2 OSR selection. ADCSINC2OSR_22...ADCSINC2OSR_1333 */
uint32_t DftNum; /* DFT number */
uint32_t DftSrc; /* DFT Source */
BoolFlag HanWinEn; /* Enable Hanning window */
uint32_t SeqWaitAddr[3];
/* Sweep Function Control */
SoftSweepCfg_Type SweepCfg;
/* Private variables for internal usage */
float SweepCurrFreq;
float SweepNextFreq;
float FreqofData;
BoolFlag BATInited; /* If the program run firstly, generated sequence commands */
SEQInfo_Type InitSeqInfo;
SEQInfo_Type MeasureSeqInfo;
BoolFlag StopRequired; /* After FIFO is ready, stop the measurement sequence */
uint32_t FifoDataCount; /* Count how many times impedance have been measured */
uint32_t MeasSeqCycleCount; /* How long the measurement sequence will take */
float MaxODR; /* Max ODR for sampling in this config */
fImpCar_Type RcalVolt; /* The measured Rcal resistor(R1) response voltage. */
float RcalVoltTable[100][2];
/* End */
}AppBATCfg_Type;
#define BATCTRL_START 0
#define BATCTRL_STOPNOW 1
#define BATCTRL_STOPSYNC 2
#define BATCTRL_SHUTDOWN 4 /* Note: shutdown here means turn off everything and put AFE to hibernate mode. The word 'SHUT DOWN' is only used here. */
#define BATCTRL_MRCAL 5 /* Measure RCAL response voltage */
#define BATCTRL_GETFREQ 6
AD5940Err AppBATGetCfg(void *pCfg);
AD5940Err AppBATInit(uint32_t *pBuffer, uint32_t BufferSize);
AD5940Err AppBATISR(void *pBuff, uint32_t *pCount);
AD5940Err AppBATCtrl(int32_t BatCtrl, void *pPara);
AD5940Err AppBATCheckFreq(float freq);
AD5940Err AppBATMeasureRCAL(void);
#endif