/*!
 *****************************************************************************
 @file:    AD5940Main.c
 @author:  $Author: nxu2 $
 @brief:   Used to control specific application and further process data.
 @version: $Revision: 766 $
 @date:    $Date: 2017-08-21 14:09:35 +0100 (Mon, 21 Aug 2017) $
 -----------------------------------------------------------------------------
Copyright (c) 2017-2019 Analog Devices, Inc. All Rights Reserved.
This software is proprietary to Analog Devices, Inc. and its licensors.
By using this software you agree to the terms of the associated
Analog Devices Software License Agreement.
*****************************************************************************/
#include "ad5940.h"
#include "AD5940.h"
#include <stdio.h>
#include "string.h"
#include "math.h"
#include "Amperometric.h"

#define APPBUFF_SIZE 1000
uint32_t AppBuff[APPBUFF_SIZE];
float LFOSCFreq;
/* It's your choice here how to do with the data. Here is just an example to print them to UART */
int32_t AMPShowResult(float *pData, uint32_t DataCount)
{
  /* Print data*/
  for(int i=0;i<DataCount;i++)
  {
    printf("index:%d, Current:%fuA\n", i, pData[i]);
  }
  return 0;
}

/* Initialize AD5940 basic blocks like clock */
static int32_t AD5940PlatformCfg(void)
{
  CLKCfg_Type clk_cfg;
  FIFOCfg_Type fifo_cfg;
	SEQCfg_Type seq_cfg;
  AGPIOCfg_Type gpio_cfg;
	LFOSCMeasure_Type LfoscMeasure;
  /* Use hardware reset */
  AD5940_HWReset();
  /* Platform configuration */
  AD5940_Initialize();
  /* Step1. Configure clock */
  clk_cfg.HFOSCEn = bTRUE;
  clk_cfg.HFXTALEn = bFALSE;
  clk_cfg.LFOSCEn = bTRUE;
  clk_cfg.HfOSC32MHzMode = bFALSE;
  clk_cfg.SysClkSrc = SYSCLKSRC_HFOSC;
  clk_cfg.SysClkDiv = SYSCLKDIV_1;
  clk_cfg.ADCCLkSrc = ADCCLKSRC_HFOSC;
  clk_cfg.ADCClkDiv = ADCCLKDIV_1;
  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;      
  AD5940_FIFOCfg(&fifo_cfg);                             /* Disable to reset FIFO. */
	fifo_cfg.FIFOEn = bTRUE;  
  AD5940_FIFOCfg(&fifo_cfg);                             /* Enable FIFO here */
  /* Configure sequencer and stop it */
  seq_cfg.SeqMemSize = SEQMEMSIZE_2KB;
  seq_cfg.SeqBreakEn = bFALSE;
  seq_cfg.SeqIgnoreEn = bFALSE;
  seq_cfg.SeqCntCRCClr = bTRUE;
  seq_cfg.SeqEnable = bFALSE;
  seq_cfg.SeqWrTimer = 0;
  AD5940_SEQCfg(&seq_cfg);
	
  /* 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 = GP6_SYNC|GP5_SYNC|GP4_SYNC|GP2_SYNC|GP1_SLEEP|GP0_INT;
  gpio_cfg.InputEnSet = 0;
  gpio_cfg.OutputEnSet = AGPIO_Pin0|AGPIO_Pin1|AGPIO_Pin4|AGPIO_Pin5|AGPIO_Pin6|AGPIO_Pin2;
  gpio_cfg.OutVal = 0;
  gpio_cfg.PullEnSet = 0;
  AD5940_AGPIOCfg(&gpio_cfg);
	
  AD5940_SleepKeyCtrlS(SLPKEY_UNLOCK);  /* Allow AFE to enter sleep mode. */
  /* Measure LFOSC frequency */
  LfoscMeasure.CalDuration = 1000.0;  /* 1000ms used for calibration. */
  LfoscMeasure.CalSeqAddr = 0;
  LfoscMeasure.SystemClkFreq = 16000000.0f; /* 16MHz in this firmware. */
  AD5940_LFOSCMeasure(&LfoscMeasure, &LFOSCFreq);
  printf("Freq:%f\n", LFOSCFreq); 
  return 0;
}

/* !!Change the application parameters here if you want to change it to none-default value */
void AD5940AMPStructInit(void)
{
  AppAMPCfg_Type *pAMPCfg;
  
  AppAMPGetCfg(&pAMPCfg);
	pAMPCfg->WuptClkFreq = LFOSCFreq;
  /* Configure general parameters */
  pAMPCfg->SeqStartAddr = 0;
  pAMPCfg->MaxSeqLen = 512;     /* @todo add checker in function */  
  pAMPCfg->RcalVal = 10000.0;
  pAMPCfg->NumOfData = -1;      /* Never stop until you stop it manually by AppAMPCtrl() function */	
	
	
	/* Configure measurement parameters */
  pAMPCfg->AmpODR = 1;          	/* Time between samples in seconds */
  pAMPCfg->FifoThresh = 4;      		/* Number of measurements before alerting host microcontroller */
	
  pAMPCfg->SensorBias = 0;   			/* Sensor bias voltage between reference and sense electrodes*/
	pAMPCfg->LptiaRtiaSel = LPTIARTIA_1K;
	pAMPCfg->LpTiaRl = LPTIARLOAD_10R;
	pAMPCfg->Vzero = 1100;        		/* Vzero voltage. Voltage on Sense electrode. Unit is mV*/
	
	pAMPCfg->ADCRefVolt = 1.82;		/* Measure voltage on Vref_1V8 pin */
}

void AD5940_Main(void)
{
  uint32_t temp;
  
  AD5940PlatformCfg();
  AD5940AMPStructInit(); /* Configure your parameters in this function */ 
  AppAMPInit(AppBuff, APPBUFF_SIZE);    /* Initialize AMP application. Provide a buffer, which is used to store sequencer commands */
  AppAMPCtrl(AMPCTRL_START, 0);         /* Control AMP measurement to start. Second parameter has no meaning with this command. */

  while(1)
  {
    /* Check if interrupt flag which will be set when interrupt occurred. */
    if(AD5940_GetMCUIntFlag())
    {
      AD5940_ClrMCUIntFlag(); /* Clear this flag */
      temp = APPBUFF_SIZE;
      AppAMPISR(AppBuff, &temp); /* Deal with it and provide a buffer to store data we got */
      AMPShowResult((float*)AppBuff, temp); /* Show the results to UART */
    }
  }
}