/********************************** (C) COPYRIGHT *******************************
* File Name          : main.c
* Author             : WCH
* Version            : V1.0.0
* Date               : 2021/08/08
* Description        : Main program body.
* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
* SPDX-License-Identifier: Apache-2.0
*******************************************************************************/

/*
 *@Note
  双ADC慢速交叉采样例程：
 ADC1通道2(PA2),ADC2通道2(PA2)),规则组通道通过ADC中断获取双 ADC转换数据。
*/

#include "debug.h"

/* Global Variable */
u16 Adc_Val[2];
u32 temp;
s16 Calibrattion_Val1 = 0;
s16 Calibrattion_Val2 = 0;

/*********************************************************************
 * @fn      ADC_Function_Init
 *
 * @brief   Initializes ADC collection.
 *
 * @return  none
 */
void  ADC_Function_Init( void )
{
    ADC_InitTypeDef ADC_InitStructure = {0};
    GPIO_InitTypeDef GPIO_InitStructure = {0};
    NVIC_InitTypeDef NVIC_InitStructure = {0};

    RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA, ENABLE );
    RCC_APB2PeriphClockCmd( RCC_APB2Periph_ADC1, ENABLE );
    RCC_APB2PeriphClockCmd( RCC_APB2Periph_ADC2, ENABLE );
    RCC_ADCCLKConfig( RCC_PCLK2_Div4 );

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init( GPIOA, &GPIO_InitStructure );

    ADC_DeInit( ADC1 );
    ADC_DeInit( ADC2 );

    NVIC_InitStructure.NVIC_IRQChannel = ADC1_2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init( &NVIC_InitStructure );

    ADC_InitStructure.ADC_Mode = ADC_Mode_SlowInterl;
    ADC_InitStructure.ADC_ScanConvMode = DISABLE;
    ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
    ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
    ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
    ADC_InitStructure.ADC_NbrOfChannel = 1;
    ADC_InitStructure.ADC_OutputBuffer = ADC_OutputBuffer_Disable;
    ADC_InitStructure.ADC_Pga = ADC_Pga_1;

    ADC_Init( ADC1, &ADC_InitStructure );
    ADC_RegularChannelConfig( ADC1, ADC_Channel_2, 1, ADC_SampleTime_13Cycles5 );

    ADC_ITConfig( ADC1, ADC_IT_EOC, ENABLE );
    ADC_DMACmd( ADC1, ENABLE );
    ADC_Cmd( ADC1, ENABLE );

    ADC_BufferCmd( ADC1, DISABLE ); //disable buffer
    ADC_ResetCalibration( ADC1 );
    while( ADC_GetResetCalibrationStatus( ADC1 ) );
    ADC_StartCalibration( ADC1 );
    while( ADC_GetCalibrationStatus( ADC1 ) );
    Calibrattion_Val1 = Get_CalibrationValue( ADC1 );

    ADC_BufferCmd( ADC1, ENABLE ); //enable buffer

    ADC_Init( ADC2, &ADC_InitStructure );
    ADC_RegularChannelConfig( ADC2, ADC_Channel_2, 1, ADC_SampleTime_13Cycles5 );

    ADC_ITConfig( ADC2, ADC_IT_EOC, ENABLE );
    ADC_SoftwareStartConvCmd( ADC2, ENABLE );
    ADC_Cmd( ADC2, ENABLE );

    ADC_BufferCmd( ADC2, DISABLE ); //disable buffer
    ADC_ResetCalibration( ADC2 );
    while( ADC_GetResetCalibrationStatus( ADC2 ) );
    ADC_StartCalibration( ADC2 );
    while( ADC_GetCalibrationStatus( ADC2 ) );
    Calibrattion_Val2 = Get_CalibrationValue( ADC2 );

    ADC_BufferCmd( ADC2, ENABLE ); //enable buffer
}

/*********************************************************************
 * @fn      Get_ConversionVal1
 *
 * @brief   Get Conversion Value.
 *
 * @param   val - Sampling value
 *
 * @return  val+Calibrattion_Val - Conversion Value.
 */
u16 Get_ConversionVal1( s16 val )
{
    if( ( val + Calibrattion_Val1 ) < 0 )
    {
        return 0;
    }
    if( ( Calibrattion_Val1 + val ) > 4095 )
    {
        return 4095;
    }
    return ( val + Calibrattion_Val1 );
}

/*********************************************************************
 * @fn      Get_ConversionVal2
 *
 * @brief   Get Conversion Value.
 *
 * @param   val - Sampling value
 *
 * @return  val+Calibrattion_Val - Conversion Value.
 */
u16 Get_ConversionVal2( s16 val )
{
    if( ( val + Calibrattion_Val2 ) < 0 )
    {
        return 0;
    }
    if( ( Calibrattion_Val2 + val ) > 4095 )
    {
        return 4095;
    }
    return ( val + Calibrattion_Val2 );
}

/*********************************************************************
 * @fn      main
 *
 * @brief   Main program.
 *
 * @return  none
 */
int main( void )
{
    USART_Printf_Init( 115200 );
    Delay_Init();
    printf( "SystemClk:%d\r\n", SystemCoreClock );
    ADC_Function_Init();
    printf( "CalibrattionValue1:%d\n", Calibrattion_Val1 );
    printf( "CalibrattionValue2:%d\n", Calibrattion_Val2 );

    while( 1 )
    {
        ADC_SoftwareStartConvCmd( ADC1, ENABLE );
        Delay_Ms( 1000 );
        ADC_SoftwareStartConvCmd( ADC1, DISABLE );
        Delay_Ms( 1000 );
    }
}

/*********************************************************************
 * @fn      ADC1_2_IRQHandler
 *
 * @brief   ADC1_2 Interrupt Service Function.
 *
 * @return  none
 */
void ADC1_2_IRQHandler()
{
    if( ADC_GetITStatus( ADC1, ADC_IT_EOC ) )
    {
        temp = ADC1->RDATAR;
        Adc_Val[0] = temp & 0xffff;
        Adc_Val[1] = ( temp >> 16 ) & 0xffff;

        printf( "\r\nADC1 ch2=%d\r\n", Get_ConversionVal1( Adc_Val[0] ) );
        printf( "\r\nADC2 ch2=%d\r\n", Get_ConversionVal2( Adc_Val[1] ) );
				ADC_ClearITPendingBit( ADC1, ADC_IT_EOC );
				ADC_ClearITPendingBit( ADC2, ADC_IT_EOC );
    }
}


