/********************************** (C) COPYRIGHT *******************************
 * File Name          : main.c
 * Author             : WCH
 * Version            : V1.0.0
 * Date               : 2024/11/20
 * Description        : Main program body.
 *********************************************************************************
 * Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
 * Attention: This software (modified or not) and binary are used for 
 * microcontroller manufactured by Nanjing Qinheng Microelectronics.
 *******************************************************************************/

/*
 *@Note
 *TIM continue Mode routine:
 *TIM1_CH1(PA8)
 *This example demonstrates that the TIM_CH1(PA8) pin outputs PWM in PWM mode by continue mode
 *
 */

#include "debug.h"

#define Size    18
/* Private variables */
u16 pbuf[Size] = {0x0081,0x0000,0x0000,0x0100,
                  0x001f,0x0000,0x0070,0x0000,
                  0x0001,0x0000,0xbb7f,0x0064,
                  0x0000,0x0032,0x0000,0x0000,0x0000,0x8000};

/*********************************************************************
 * @fn      TIM1_DMA_Init
 *
 * @brief   Initializes the TIM DMAy Channelx configuration.
 *
 * @return  none
 */
void TIM1_DMA_Init(DMA_Channel_TypeDef *DMA_CHx, u32 ppadr, u32 memadr, u16 bufsize)
{
    DMA_InitTypeDef   DMA_InitStructure = {0};
    NVIC_InitTypeDef  NVIC_InitStructure = {0};
    GPIO_InitTypeDef  GPIO_InitStructure = {0};

    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |RCC_APB2Periph_TIM1, ENABLE);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
    GPIO_SetBits(GPIOA, GPIO_Pin_2);

    DMA_DeInit(DMA_CHx);
    DMA_InitStructure.DMA_PeripheralBaseAddr = ppadr;
    DMA_InitStructure.DMA_MemoryBaseAddr = memadr;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
    DMA_InitStructure.DMA_BufferSize = bufsize;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
    DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
    DMA_Init(DMA_CHx, &DMA_InitStructure);

    DMA_Cmd(DMA_CHx, ENABLE);

    NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel5_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
    DMA_ITConfig( DMA1_Channel5, DMA_IT_TC, ENABLE );
}

void DMA1_Channel5_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
void DMA1_Channel5_IRQHandler(void)
{
    if( DMA_GetITStatus(DMA1_IT_TC5) != RESET )
    {
        GPIO_ResetBits(GPIOA, GPIO_Pin_2);
        DMA_ClearITPendingBit(DMA1_IT_TC5);
    }
}

/*********************************************************************
 * @fn      main
 *
 * @brief   Main program.
 *
 * @return  none
 */
int main(void)
{
    SystemCoreClockUpdate();
    Delay_Init();
    USART_Printf_Init(115200);
    printf("SystemClk:%d\r\n", SystemCoreClock);
    printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() );

    TIM1_DMA_Init(DMA1_Channel5, (u32)&TIM1->DMAADR, (u32)pbuf, Size);
    TIM_DMAConfig(TIM1, TIM_DMABase_CR1, TIM_DMABurstLength_18Bytes);

    TIM_DMACmd(TIM1, TIM_DMA_Update, ENABLE);
    TIM_Cmd(TIM1, ENABLE);

    while(1)
        {
        }
}