/********************************** (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
 定时器触发DAC转换例程：
 DAC通道0(PA4)输出
 通过TIM8_TRGO事件触发1次DAC转换，PA4输出相应的电压。

*/

#include "debug.h"

/* Global define */
#define Num 7

/* Global Variable */
u16 DAC_Value[Num] = {64, 128, 256, 512, 1024, 2048, 4095};


/*********************************************************************
 * @fn      Dac_Init
 *
 * @brief   Initializes DAC collection.
 *
 * @return  none
 */
void Dac_Init( void )
{
    GPIO_InitTypeDef GPIO_InitStructure = {0};
    DAC_InitTypeDef DAC_InitType = {0};

    RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA, ENABLE );
    RCC_APB1PeriphClockCmd( RCC_APB1Periph_DAC, ENABLE );

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init( GPIOA, &GPIO_InitStructure );
    GPIO_SetBits( GPIOA, GPIO_Pin_4 );

    DAC_InitType.DAC_Trigger = DAC_Trigger_T8_TRGO;
    DAC_InitType.DAC_WaveGeneration = DAC_WaveGeneration_None;
    DAC_InitType.DAC_OutputBuffer = DAC_OutputBuffer_Disable ;
    DAC_Init( DAC_Channel_1, &DAC_InitType );

    DAC_Cmd( DAC_Channel_1, ENABLE );

}

/*********************************************************************
 * @fn      TIM8_Init
 *
 * @brief   Initializes TIM3 collection.
 *
 * @param   arr - TIM_Period
 *          psc - TIM_Prescaler
 *
 * @return  none
 */
void TIM8_Init( u16 arr, u16 psc )
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure = {0};

    RCC_APB2PeriphClockCmd( RCC_APB2Periph_TIM8, ENABLE );

    TIM_TimeBaseInitStructure.TIM_Period = arr;
    TIM_TimeBaseInitStructure.TIM_Prescaler = psc;
    TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Down;
    TIM_TimeBaseInitStructure.TIM_RepetitionCounter =  0x00;
    TIM_TimeBaseInit( TIM8, &TIM_TimeBaseInitStructure );

    TIM_SelectOutputTrigger( TIM8, TIM_TRGOSource_Update );
    TIM_Cmd( TIM8, ENABLE );
}

/*********************************************************************
 * @fn      main
 *
 * @brief   Main program.
 *
 * @return  none
 */
int main( void )
{
    u8 i = 0;
    NVIC_PriorityGroupConfig( NVIC_PriorityGroup_2 );
    Delay_Init();
    USART_Printf_Init( 115200 );

    printf( "SystemClk:%d\r\n", SystemCoreClock );
    printf( "Timer Trig\r\n" );

    TIM8_Init( 0x7, 48000 - 1 );
    Dac_Init();

    while( 1 )
    {
        DAC->R12BDHR1 = DAC_Value[i];
        i++;

        if( i > Num )
        {
            i = 0;
        }

        Delay_Ms( 1000 );
        printf( "run\r\n" );
        printf( "DAC->R12BDHR1:0x%04x\r\n", DAC->R12BDHR1 );
        printf( "DAC->DOR1:0x%04x\r\n", DAC->DOR1 );
        printf( "TIM3->CNT:%d\r\n", TIM3->CNT );

    }
}



