144 lines
5.3 KiB
C
144 lines
5.3 KiB
C
/*!
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*****************************************************************************
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@file: AD5940Main.c
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@author: $Author: nxu2 $
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@brief: Used to control specific application and further process data.
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@version: $Revision: 766 $
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@date: $Date: 2017-08-21 14:09:35 +0100 (Mon, 21 Aug 2017) $
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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 "ad5940.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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#include "Amperometric.h"
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#define APPBUFF_SIZE 1000
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uint32_t AppBuff[APPBUFF_SIZE];
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float LFOSCFreq;
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/* It's your choice here how to do with the data. Here is just an example to print them to UART */
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int32_t AMPShowResult(float *pData, uint32_t DataCount)
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{
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/* Print data*/
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for(int i=0;i<DataCount;i++)
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{
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printf("index:%d, Current:%fuA\n", i, pData[i]);
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}
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return 0;
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}
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/* Initialize AD5940 basic blocks like clock */
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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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SEQCfg_Type seq_cfg;
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AGPIOCfg_Type gpio_cfg;
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LFOSCMeasure_Type LfoscMeasure;
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/* Use hardware reset */
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AD5940_HWReset();
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/* Platform configuration */
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AD5940_Initialize();
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/* Step1. Configure clock */
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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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clk_cfg.HfOSC32MHzMode = bFALSE;
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clk_cfg.SysClkSrc = SYSCLKSRC_HFOSC;
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clk_cfg.SysClkDiv = SYSCLKDIV_1;
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clk_cfg.ADCCLkSrc = ADCCLKSRC_HFOSC;
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clk_cfg.ADCClkDiv = ADCCLKDIV_1;
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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;
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AD5940_FIFOCfg(&fifo_cfg); /* Disable to reset FIFO. */
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fifo_cfg.FIFOEn = bTRUE;
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AD5940_FIFOCfg(&fifo_cfg); /* Enable FIFO here */
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/* Configure sequencer and stop it */
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seq_cfg.SeqMemSize = SEQMEMSIZE_2KB;
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seq_cfg.SeqBreakEn = bFALSE;
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seq_cfg.SeqIgnoreEn = bFALSE;
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seq_cfg.SeqCntCRCClr = bTRUE;
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seq_cfg.SeqEnable = bFALSE;
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seq_cfg.SeqWrTimer = 0;
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AD5940_SEQCfg(&seq_cfg);
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/* Step3. Interrupt controller */
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AD5940_INTCCfg(AFEINTC_1, AFEINTSRC_ALLINT, bTRUE); /* Enable all interrupt in Interrupt Controller 1, so we can check INTC flags */
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AD5940_INTCCfg(AFEINTC_0, AFEINTSRC_DATAFIFOTHRESH, bTRUE); /* Interrupt Controller 0 will control GP0 to generate interrupt to MCU */
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AD5940_INTCClrFlag(AFEINTSRC_ALLINT);
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/* Step4: Reconfigure GPIO */
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gpio_cfg.FuncSet = GP6_SYNC|GP5_SYNC|GP4_SYNC|GP2_SYNC|GP1_SLEEP|GP0_INT;
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gpio_cfg.InputEnSet = 0;
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gpio_cfg.OutputEnSet = AGPIO_Pin0|AGPIO_Pin1|AGPIO_Pin4|AGPIO_Pin5|AGPIO_Pin6|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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/* Measure LFOSC frequency */
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LfoscMeasure.CalDuration = 1000.0; /* 1000ms used for calibration. */
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LfoscMeasure.CalSeqAddr = 0;
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LfoscMeasure.SystemClkFreq = 16000000.0f; /* 16MHz in this firmware. */
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AD5940_LFOSCMeasure(&LfoscMeasure, &LFOSCFreq);
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printf("Freq:%f\n", LFOSCFreq);
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return 0;
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}
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/* !!Change the application parameters here if you want to change it to none-default value */
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void AD5940AMPStructInit(void)
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{
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AppAMPCfg_Type *pAMPCfg;
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AppAMPGetCfg(&pAMPCfg);
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pAMPCfg->WuptClkFreq = LFOSCFreq;
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/* Configure general parameters */
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pAMPCfg->SeqStartAddr = 0;
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pAMPCfg->MaxSeqLen = 512; /* @todo add checker in function */
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pAMPCfg->RcalVal = 10000.0;
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pAMPCfg->NumOfData = -1; /* Never stop until you stop it manually by AppAMPCtrl() function */
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/* Configure measurement parameters */
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pAMPCfg->AmpODR = 1; /* Time between samples in seconds */
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pAMPCfg->FifoThresh = 4; /* Number of measurements before alerting host microcontroller */
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pAMPCfg->SensorBias = 0; /* Sensor bias voltage between reference and sense electrodes*/
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pAMPCfg->LptiaRtiaSel = LPTIARTIA_1K;
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pAMPCfg->LpTiaRl = LPTIARLOAD_10R;
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pAMPCfg->Vzero = 1100; /* Vzero voltage. Voltage on Sense electrode. Unit is mV*/
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pAMPCfg->ADCRefVolt = 1.82; /* Measure voltage on Vref_1V8 pin */
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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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AD5940AMPStructInit(); /* Configure your parameters in this function */
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AppAMPInit(AppBuff, APPBUFF_SIZE); /* Initialize AMP application. Provide a buffer, which is used to store sequencer commands */
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AppAMPCtrl(AMPCTRL_START, 0); /* Control AMP 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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/* Check if interrupt flag which will be set when interrupt occurred. */
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if(AD5940_GetMCUIntFlag())
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{
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AD5940_ClrMCUIntFlag(); /* Clear this flag */
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temp = APPBUFF_SIZE;
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AppAMPISR(AppBuff, &temp); /* Deal with it and provide a buffer to store data we got */
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AMPShowResult((float*)AppBuff, temp); /* Show the results to UART */
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}
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}
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}
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