STM32定时器4无法正常工作

STM32C8T6单片机定时器4（TIM4）用不了，在同一个例程中，将TIM4改为TIM3或者TIM2都能实现功能。但是一但改成TIM4就不行了，无论是作为pwm输出，还是编码器输入，都没有一点反映


```c
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO, ENABLE);
    

    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);
        

    TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInitStructure.TIM_Period = 65536 - 1;        //ARR
    TIM_TimeBaseInitStructure.TIM_Prescaler = 1 - 1;        //PSC
    TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
    TIM_TimeBaseInit(TIM4, &TIM_TimeBaseInitStructure);
    
    TIM_ICStructInit(&TIM_ICInitStructure);
    TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
    TIM_ICInitStructure.TIM_ICFilter = 0xF;
    TIM_ICInit(TIM4, &TIM_ICInitStructure);
    TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;
    TIM_ICInitStructure.TIM_ICFilter = 0xF;
    TIM_ICInit(TIM4, &TIM_ICInitStructure);
    
    TIM_EncoderInterfaceConfig(TIM4, TIM_EncoderMode_TI12, TIM_ICPolarity_Rising, TIM_ICPolarity_Rising);
    
    TIM_Cmd(TIM4, ENABLE);
}

int16_t Encoder2_Get(void)
{
    int16_t Temp;
    Temp = TIM_GetCounter(TIM4);
    TIM_SetCounter(TIM4, 0);
    return Temp;
}

```

  • 关于该问题，我找了一篇非常好的博客，你可以看看是否有帮助，链接：利用STM32的TIM1/TIM8输出可以移相的互补PWM
  • 除此之外, 这篇博客: STM32F103C8T6定时器TIM4通道1、2输出PWM中的 下面是代码 部分也许能够解决你的问题, 你可以仔细阅读以下内容或跳转源博客中阅读:

  • timer.c

    #include "timer.h"

//TIM4 PWM部分初始化 
//arr：自动重装值
//psc：时钟预分频数
void TIM4_PWM_Init(u16 arr,u16 psc)
{  
	//**结构体声明**//
	GPIO_InitTypeDef GPIO_InitStructure;            //声明GPIO
	TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure; //声明定时器
	TIM_OCInitTypeDef  TIM_OCInitStructure;         //声明PWM通道
	
	//**时钟使能**//
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);	//使能定时器TIM4时钟
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);	 //使能PB端口时钟
	
	//****//
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;				 //LED0-->PB.6 端口配置
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; 		 //复用推挽输出
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;		 //IO口速度为50MHz
	GPIO_Init(GPIOB, &GPIO_InitStructure);					 //根据设定参数初始化GPIOB.6
	GPIO_SetBits(GPIOB,GPIO_Pin_6);
	//****//
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;				 //LED0-->PB.7 端口配置
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; 		 //复用推挽输出
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;		 //IO口速度为50MHz
	GPIO_Init(GPIOB, &GPIO_InitStructure);					 //根据设定参数初始化GPIOB.7
	GPIO_SetBits(GPIOB,GPIO_Pin_7);

  //初始化TIM3
	TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值
	TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值 
	TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim
	TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
	TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位

	//初始化TIM3 Channel1 PWM模式	 
	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //选择定时器模式:TIM脉冲宽度调制模式2
 	TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
	TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高
	TIM_OC1Init(TIM4, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM3 OC1
	
	//初始化TIM3 Channel2 PWM模式	 
	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //选择定时器模式:TIM脉冲宽度调制模式2
 	TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
	TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高
	TIM_OC2Init(TIM4, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM3 OC2

	TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Enable);  //使能TIM4_CH1预装载寄存器
	TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Enable);  //使能TIM4_CH2预装载寄存器
   
	TIM_Cmd(TIM4, ENABLE);  //使能TIM3
	
}

    timer.h

    #ifndef __TIMER_H
#define __TIMER_H
#include "sys.h"

void TIM4_PWM_Init(u16 arr,u16 psc);

#endif

    main.c

    #include "delay.h"
#include "sys.h"
#include "timer.h"
 
 int main(void)
 {		
	delay_init();	    	 //延时函数初始化	  
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); 	 //设置NVIC中断分组2:2位抢占优先级，2位响应优先级
 	TIM4_PWM_Init(899,0);	 //不分频。PWM频率=72000000/900=80Khz
   	while(1)
	{	
		TIM_SetCompare1(TIM4,400);		//TIM4->CCR1=400					 
		TIM_SetCompare2(TIM4,800);	    //TIM4->CCR2=800
	}	 
 }

以下内容由CHATGPT及阿里嘎多学长共同生成、有用望采纳：

可能的原因是TIM4的时钟没有被使能。请检查RCC_APB1PeriphClockCmd函数中的参数是否正确。另外，如果您使用的是定时器4通道1或通道2作为PWM输出，请确保相应的GPIO引脚被正确配置为TIM4功能，并且在GPIO初始化中设置了合适的模式和速度。如果使用编码器模式，请确保TIM4与编码器的接口正确连接，并且编码器的输出信号满足TIM4的输入要求。下面是参考代码：

// 使能TIM4时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);

// 使能GPIOB时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

// 初始化GPIOB6和GPIOB7为TIM4输入模式
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);

// 初始化TIM4
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
TIM_TimeBaseInitStruct.TIM_Prescaler = 0;
TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInitStruct.TIM_Period = 65535;
TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStruct.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseInitStruct);

// 配置TIM4为编码器模式
TIM_EncoderInterfaceConfig(TIM4, TIM_EncoderMode_TI12, TIM_ICPolarity_Rising, TIM_ICPolarity_Rising);

// 使能TIM4
TIM_Cmd(TIM4, ENABLE);

// 获取编码器计数值
int16_t Encoder2_Get(void)
{
    int16_t Temp;
    Temp = TIM_GetCounter(TIM4);
    TIM_SetCounter(TIM4, 0);
    return Temp;
}