/********************************** (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DAC输出三角波例程：
 DAC分别从PA4和PA5输出
   输出两路幅值和频率不同的三角波
*/

#include "debug.h"

/* Global define */


/* Global Variable */



/*********************************************************************
 * @fn      Dual_Dac_Init
 *
 * @brief   Initializes DAC collection.
 *
 * @return  none
 */
void Dual_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_Pin_5;
    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_T4_TRGO;
    DAC_InitType.DAC_WaveGeneration = DAC_WaveGeneration_Triangle;
    DAC_InitType.DAC_LFSRUnmask_TriangleAmplitude = DAC_TriangleAmplitude_4095;
    DAC_InitType.DAC_OutputBuffer = DAC_OutputBuffer_Disable ;
    DAC_Init( DAC_Channel_1, &DAC_InitType );
    DAC_InitType.DAC_LFSRUnmask_TriangleAmplitude = DAC_TriangleAmplitude_2047;
    DAC_Init( DAC_Channel_2, &DAC_InitType );

    DAC_Cmd( DAC_Channel_1, ENABLE );
    DAC_Cmd( DAC_Channel_2, ENABLE );

    DAC_SetDualChannelData( DAC_Align_12b_R, 0, 0 );
}

/*********************************************************************
 * @fn      Timer4_Init
 *
 * @brief   Initializes TIM4.
 *
 * @return  none
 */
void Timer4_Init( void )
{
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure = {0};
    RCC_APB1PeriphClockCmd( RCC_APB1Periph_TIM4, ENABLE );

    TIM_TimeBaseStructInit( &TIM_TimeBaseStructure );
    TIM_TimeBaseStructure.TIM_Period = 36 - 1;
    TIM_TimeBaseStructure.TIM_Prescaler = 0;
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit( TIM4, &TIM_TimeBaseStructure );

    TIM_SelectOutputTrigger( TIM4, TIM_TRGOSource_Update );
    TIM_Cmd( TIM4, ENABLE );
}

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

    Dual_Dac_Init();
    Timer4_Init();
    while( 1 )
    {

        printf( "CNT=%d\r\n", TIM4->CNT );
        printf( "RD12BDHR=0x%04x\r\n", DAC->RD12BDHR );
        printf( "DOR1=0x%04x\r\n", DAC->DOR1 );
        printf( "DOR2=0x%04x\r\n", DAC->DOR2 );
        Delay_Ms( 500 );
    }
}

