第五十六章、CH32V103应用教程——TIM-单脉冲模式

#ifndef __TIM_H

#define __TIM_H



#include "ch32v10x_conf.h"



void One_Pulse_Init( u16 arr, u16 psc, u16 ccp );



#endif

#include "tim.h"



/*******************************************************************************

* Function Name  : One_Pulse_Init

* Description    : Initializes TIM1 one pulse.

* Input          : arr: the period value.

*                  psc: the prescaler value.

*                  ccp: the pulse value.

* Return         : None

*******************************************************************************/

void One_Pulse_Init( u16 arr, u16 psc, u16 ccp )

{

    GPIO_InitTypeDef GPIO_InitStructure;

    TIM_OCInitTypeDef TIM_OCInitStructure;

    TIM_ICInitTypeDef TIM_ICInitStructure;

    TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;



    RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA, ENABLE );

    RCC_APB1PeriphClockCmd( RCC_APB1Periph_TIM2, ENABLE );



    //GPIO初始化配置

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;

    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_1;

    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;

    GPIO_Init( GPIOA, &GPIO_InitStructure);



    //时基结构体初始化

    TIM_TimeBaseInitStructure.TIM_Period = arr;  //自动重装值寄存器的值

    TIM_TimeBaseInitStructure.TIM_Prescaler = psc;   //驱动CNT计数器的时钟 = Fck_int/(psc+1)

    TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;  //时钟分频因子 ，配置死区时间时需要用到

    TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;  //计数器计数模式，设置为向上计数

    TIM_TimeBaseInit( TIM2, &TIM_TimeBaseInitStructure);  //初始化定时器



    //输出比较结构体初始化

    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;  //输出比较模式选择

    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;  //输出使能

    TIM_OCInitStructure.TIM_Pulse = ccp;  //设置占空比大小

    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;  //输出通道电平极性配置

    TIM_OC1Init( TIM2, &TIM_OCInitStructure );



    //输入捕获结构体初始化

    TIM_ICStructInit( &TIM_ICInitStructure );

    TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;  //配置输入捕获通道，根据具体GPIO配置

    TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;  //设置输入的需要被捕获的信号的分频系数

    TIM_ICInitStructure.TIM_ICFilter = 0x00;  //设置输入的需要被捕获的信号的滤波系数

    TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;  //配置输入捕获信号的极性

    TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;  //设置输入通道和捕获通道的映射关系

    TIM_ICInit( TIM2, &TIM_ICInitStructure );



    TIM_SelectOnePulseMode( TIM2,TIM_OPMode_Single );

    TIM_SelectInputTrigger( TIM2, TIM_TS_TI2FP2 );

    TIM_SelectSlaveMode( TIM2, TIM_SlaveMode_Trigger );

}

int main(void)

{

    USART_Printf_Init(115200);

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



    One_Pulse_Init( 200, 48000-1, 100 );



    while(1);

}