143 lines
4.7 KiB
C
143 lines
4.7 KiB
C
/*!
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*****************************************************************************
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@file: AD5940Main.c
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@author: Neo Xu
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@brief: Standard 4-wire or 2-wire impedance measurement example.
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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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#include "Impedance.h"
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/**
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User could configure following parameters
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**/
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#define APPBUFF_SIZE 512
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uint32_t AppBuff[APPBUFF_SIZE];
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int32_t ImpedanceShowResult(uint32_t *pData, uint32_t DataCount)
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{
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float freq;
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fImpPol_Type *pImp = (fImpPol_Type*)pData;
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AppIMPCtrl(IMPCTRL_GETFREQ, &freq);
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printf("Freq:%.2f ", freq);
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/*Process data*/
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for(int i=0;i<DataCount;i++)
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{
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printf("RzMag: %f Ohm , RzPhase: %f \n",pImp[i].Magnitude,pImp[i].Phase*180/MATH_PI);
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}
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return 0;
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}
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static int32_t AD5940PlatformCfg(void)
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{
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CLKCfg_Type clk_cfg;
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FIFOCfg_Type fifo_cfg;
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AGPIOCfg_Type gpio_cfg;
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/* Use hardware reset */
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AD5940_HWReset();
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AD5940_Initialize();
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/* Platform configuration */
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/* Step1. Configure clock */
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clk_cfg.ADCClkDiv = ADCCLKDIV_1;
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clk_cfg.ADCCLkSrc = ADCCLKSRC_HFOSC;
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clk_cfg.SysClkDiv = SYSCLKDIV_1;
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clk_cfg.SysClkSrc = SYSCLKSRC_HFOSC;
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clk_cfg.HfOSC32MHzMode = bFALSE;
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clk_cfg.HFOSCEn = bTRUE;
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clk_cfg.HFXTALEn = bFALSE;
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clk_cfg.LFOSCEn = bTRUE;
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AD5940_CLKCfg(&clk_cfg);
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/* Step2. Configure FIFO and Sequencer*/
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fifo_cfg.FIFOEn = bFALSE;
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fifo_cfg.FIFOMode = FIFOMODE_FIFO;
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fifo_cfg.FIFOSize = FIFOSIZE_4KB; /* 4kB for FIFO, The reset 2kB for sequencer */
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fifo_cfg.FIFOSrc = FIFOSRC_DFT;
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fifo_cfg.FIFOThresh = 4;//AppIMPCfg.FifoThresh; /* DFT result. One pair for RCAL, another for Rz. One DFT result have real part and imaginary part */
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AD5940_FIFOCfg(&fifo_cfg);
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fifo_cfg.FIFOEn = bTRUE;
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AD5940_FIFOCfg(&fifo_cfg);
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/* Step3. Interrupt controller */
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AD5940_INTCCfg(AFEINTC_1, AFEINTSRC_ALLINT, bTRUE); /* Enable all interrupt in INTC1, so we can check INTC flags */
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AD5940_INTCClrFlag(AFEINTSRC_ALLINT);
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AD5940_INTCCfg(AFEINTC_0, AFEINTSRC_DATAFIFOTHRESH, bTRUE);
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AD5940_INTCClrFlag(AFEINTSRC_ALLINT);
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/* Step4: Reconfigure GPIO */
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gpio_cfg.FuncSet = GP0_INT|GP1_SLEEP|GP2_SYNC;
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gpio_cfg.InputEnSet = 0;
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gpio_cfg.OutputEnSet = AGPIO_Pin0|AGPIO_Pin1|AGPIO_Pin2;
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gpio_cfg.OutVal = 0;
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gpio_cfg.PullEnSet = 0;
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AD5940_AGPIOCfg(&gpio_cfg);
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AD5940_SleepKeyCtrlS(SLPKEY_UNLOCK); /* Allow AFE to enter sleep mode. */
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return 0;
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}
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void AD5940ImpedanceStructInit(void)
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{
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AppIMPCfg_Type *pImpedanceCfg;
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AppIMPGetCfg(&pImpedanceCfg);
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/* Step1: configure initialization sequence Info */
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pImpedanceCfg->SeqStartAddr = 0;
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pImpedanceCfg->MaxSeqLen = 512; /* @todo add checker in function */
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pImpedanceCfg->RcalVal = 10000.0;
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pImpedanceCfg->SinFreq = 60000.0;
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pImpedanceCfg->FifoThresh = 4;
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/* Set switch matrix to onboard(EVAL-AD5940ELECZ) dummy sensor. */
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/* Note the RCAL0 resistor is 10kOhm. */
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pImpedanceCfg->DswitchSel = SWD_CE0;
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pImpedanceCfg->PswitchSel = SWP_RE0;
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pImpedanceCfg->NswitchSel = SWN_SE0;
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pImpedanceCfg->TswitchSel = SWT_SE0LOAD;
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/* The dummy sensor is as low as 5kOhm. We need to make sure RTIA is small enough that HSTIA won't be saturated. */
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pImpedanceCfg->HstiaRtiaSel = HSTIARTIA_5K;
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/* Configure the sweep function. */
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pImpedanceCfg->SweepCfg.SweepEn = bTRUE;
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pImpedanceCfg->SweepCfg.SweepStart = 1.0f; /* Start from 1kHz */
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pImpedanceCfg->SweepCfg.SweepStop = 200e3f; /* Stop at 100kHz */
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pImpedanceCfg->SweepCfg.SweepPoints = 101; /* Points is 101 */
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pImpedanceCfg->SweepCfg.SweepLog = bTRUE;
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/* Configure Power Mode. Use HP mode if frequency is higher than 80kHz. */
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pImpedanceCfg->PwrMod = AFEPWR_LP;
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/* Configure filters if necessary */
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pImpedanceCfg->ADCSinc3Osr = ADCSINC3OSR_2; /* Sample rate is 800kSPS/2 = 400kSPS */
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pImpedanceCfg->DftNum = DFTNUM_16384;
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pImpedanceCfg->DftSrc = DFTSRC_SINC3;
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}
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void AD5940_Main(void)
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{
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uint32_t temp;
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AD5940PlatformCfg();
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AD5940ImpedanceStructInit();
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AppIMPInit(AppBuff, APPBUFF_SIZE); /* Initialize IMP application. Provide a buffer, which is used to store sequencer commands */
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AppIMPCtrl(IMPCTRL_START, 0); /* Control IMP measurement to start. Second parameter has no meaning with this command. */
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while(1)
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{
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if(AD5940_GetMCUIntFlag())
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{
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AD5940_ClrMCUIntFlag();
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temp = APPBUFF_SIZE;
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AppIMPISR(AppBuff, &temp);
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ImpedanceShowResult(AppBuff, temp);
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}
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}
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}
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