/********************************** (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
 间断模式例程：
 ADC通道2(PA2)-注入组通道，通道3(PA3)-注入组通道，通道4(PA4)-注入组通道，该模式
 下，通过TIM1_CC4事件触发一次ADC转换，每次依次转换上述1个注入组通道。

*/

#include "debug.h"
s16 Calibrattion_Val = 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};

    RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA, ENABLE );
    RCC_APB2PeriphClockCmd( RCC_APB2Periph_ADC1, ENABLE );
    RCC_ADCCLKConfig( RCC_PCLK2_Div8 );

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

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init( GPIOA, &GPIO_InitStructure );

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init( GPIOA, &GPIO_InitStructure );

    ADC_DeInit( ADC1 );
    ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
    ADC_InitStructure.ADC_ScanConvMode = DISABLE;
    ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
    ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigInjecConv_T1_CC4;
    ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
    ADC_InitStructure.ADC_NbrOfChannel = 3;
    ADC_Init( ADC1, &ADC_InitStructure );

    ADC_InjectedSequencerLengthConfig( ADC1, 3 );
    ADC_InjectedChannelConfig( ADC1, ADC_Channel_2, 1, ADC_SampleTime_239Cycles5 );
    ADC_InjectedChannelConfig( ADC1, ADC_Channel_3, 2, ADC_SampleTime_239Cycles5 );
    ADC_InjectedChannelConfig( ADC1, ADC_Channel_4, 3, ADC_SampleTime_239Cycles5 );

    ADC_DiscModeChannelCountConfig( ADC1, 1 );
    ADC_InjectedDiscModeCmd( ADC1, ENABLE );
    ADC_ExternalTrigInjectedConvCmd( 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_Val = Get_CalibrationValue( ADC1 );

    ADC_BufferCmd( ADC1, ENABLE ); //enable buffer
}

/*********************************************************************
 * @fn      TIM1_PWM_In
 *
 * @brief   Initializes TIM1 PWM output.
 *
 * @param   arr - the period value.
 *          psc - the prescaler value.
 *          ccp - the pulse value.
 *
 * @return  none
 */
void TIM1_PWM_In( u16 arr, u16 psc, u16 ccp )
{
    GPIO_InitTypeDef GPIO_InitStructure = {0};
    TIM_OCInitTypeDef TIM_OCInitStructure = {0};
    TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure = {0};

    RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA | RCC_APB2Periph_TIM1, ENABLE );

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init( GPIOA, &GPIO_InitStructure );

    TIM_TimeBaseInitStructure.TIM_Period = arr;
    TIM_TimeBaseInitStructure.TIM_Prescaler = psc;
    TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit( TIM1, &TIM_TimeBaseInitStructure );

    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse = ccp;
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
    TIM_OC4Init( TIM1, &TIM_OCInitStructure );

    TIM_CtrlPWMOutputs( TIM1, ENABLE );
    TIM_OC4PreloadConfig( TIM1, TIM_OCPreload_Disable );
    TIM_ARRPreloadConfig( TIM1, ENABLE );
    TIM_SelectOutputTrigger( TIM1, TIM_TRGOSource_Update );
    TIM_Cmd( TIM1, ENABLE );
}

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

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

    ADC_Function_Init();
    printf( "CalibrattionValue:%d\n", Calibrattion_Val );

    TIM1_PWM_In( 1000, 48000 - 1, 500 );

    while( 1 )
    {
        while( !ADC_GetFlagStatus( ADC1, ADC_FLAG_EOC ) );
        ADC_ClearFlag( ADC1, ADC_FLAG_EOC );
        while( !ADC_GetFlagStatus( ADC1, ADC_FLAG_JEOC ) );
        ADC_ClearFlag( ADC1, ADC_FLAG_JEOC );

        printf( "ADC Discontinuous injected group conversion...\r\n" );
        printf( "%04d\r\n", Get_ConversionVal( ADC1->IDATAR1 ) );
        printf( "%04d\r\n", Get_ConversionVal( ADC1->IDATAR2 ) );
        printf( "%04d\r\n", Get_ConversionVal( ADC1->IDATAR3 ) );
        printf( "%04d\r\n", Get_ConversionVal( ADC1->IDATAR4 ) );
    }
}
