贴块 STM32 用高级定时器 T1 生成CH1 CH4 的PWM 的初始化程序，大家小走弯路

lele182 · 发表于 2012-5-12 11:12:39

贴块 STM32 用高级定时器 T1 生成CH1 CH4 的PWM 的初始化程序，大家小走弯路

RCC->APB2ENR|=1<<11; //TIM1时钟使能

////////////////////////////////////////
GPIOA->CRH&=0XFFFF0FF0;//PA8 11 输出
GPIOA->CRH|=0X0000B00B;//复用功能输出

////////////////////////////////////////
TIM1->BDTR |=0xC0; //ARPE使能
TIM1->ARR=arr;//设定计数器自动重装值
TIM1->SC=psc;//预分频器不分频

TIM1->CCMR1|=6<<4; //CH2 PWM2模式 CH1/2
TIM1->CCMR1|=1<<3; //CH2预装载使能

TIM1->CCMR2|=6<<12; //CH2 PWM2模式 CH3/4
TIM1->CCMR2|=1<<11; //CH2预装载使能

TIM1->CCER|=1<<0; //OC2 输出使能
TIM1->CCER|=1<<12; //OC2 输出使能

TIM1->CR1 |=0x80; //ARPE使能
TIM1->CR1|=0x01; //使能定时器1

TIM1->BDTR|=0x8000; //使能定时器1输出

T1 和其它的定时器不一样，T2 T3 T4 都不需要最后这一句，而调T1时，没有最后的这个BDTR，死活不出PWM。感谢正点原子的指导。

正点原子 · 发表于 2012-5-12 11:47:56

谢谢分享.

沙盘月华 · 发表于 2012-5-13 10:56:52

谢谢楼主！

沙盘月华 · 发表于 2012-5-15 20:53:53

楼主，我用你的程序怎么调不出来啊？求指导！

lele182 · 发表于 2012-5-18 08:28:55

不可能吧，你直接将上面的程序代换原子哥的PWM程序中的PWM_Init(u16 arr,u16 psc)就行了，你再查查你初始化完PWM后有没有将这些引脚又用了做其它功能吧。我的产品都出来好几天了，在STM32F103和100都实现了的，有点信心，一定能调出来的

liushuifong · 发表于 2012-5-26 16:14:26

确实不行仿真也不能输出波形，楼主用的是比较输出波形吧修改如下即可
void Tim1_init(u16 arr,u16 psc)
{
RCC->APB2ENR|=1<<11; //TIM1时钟使能

    ////////////////////////////////////////
     GPIOA->CRH&=0XFFFF0FF0;//PA8 11 输出
     GPIOA->CRH|=0X0000B00B;//复用功能输出

    ////////////////////////////////////////
     TIM1->BDTR |=0xC0;   //ARPE使能
     TIM1->ARR=arr;//设定计数器自动重装值
     TIM1->SC=psc;//预分频器不分频

     TIM1->CCMR1|=6<<4; //CH2 PWM2模式 CH1/2
     TIM1->CCMR1|=1<<3; //CH2预装载使能

     TIM1->CCMR2|=6<<12; //CH2 PWM2模式 CH3/4
     TIM1->CCMR2|=1<<11; //CH2预装载使能



     TIM1->CCER|=1<<0;   //OC2 输出使能
     TIM1->CCER|=1<<12;   //OC2 输出使能

     TIM1->CCR1=3000;
        TIM1->CCR4=4000;

     TIM1->CR1 |=0x80;   //ARPE使能
     TIM1->CR1|=0x01;    //使能定时器1

     TIM1->BDTR|=0x8000; //使能定时器1输出
}

wanghy0119 · 发表于 2012-8-2 15:21:21

TIM1->CCMR1|=6<<4; //CH2

WM2模式 CH1/2
TIM1->CCMR1|=1<<3; //CH2预装载使能

TIM1->CCMR2|=6<<12; //CH2

WM2模式 CH3/4
TIM1->CCMR2|=1<<11; //CH2预装载使能
这里是不是应该改成这样子

TIM1->CCMR1|=7<<4; //CH2

WM2模式 CH1
TIM1->CCMR1|=1<<3; //CH2预装载使能

TIM1->CCMR1|=7<<12; //CH2

WM2模式 CH2
TIM1->CCMR1|=1<<11; //CH2预装载使能

TIM1->CCMR2|=7<<4; //CH2

WM2模式 CH3
TIM1->CCMR2|=1<<3; //CH2预装载使能

TIM1->CCMR2|=7<<12; //CH2

WM2模式 CH3
TIM1->CCMR2|=1<<11; //CH2预装载使能

fearus · 发表于 2013-5-10 16:57:25

楼主是个好人完美解决

nnhy · 发表于 2013-5-28 17:43:02

INT8 IOTimer::Init( UINT8 timer, UINT8 tchnl, HRESULT &hr )
{
if (timer >= TIM_COUNT) return FALSE;

ptr_TIM_TypeDef treg = g_Timers[timer - 1];

//debug_printf("TIM%d_%d IOTimer::Init \r\n", timer, tchnl);

// 检查并保护针脚
GPIO_PIN pin = g_IOTimer_Pins[(timer - 1) * 4 + tchnl];
if (CPU_GPIO_ReservePin(pin, TRUE) == FALSE) {
debug_printf("TIM%d_%d IOTimer::Init Failed

%c%d was Reserved\r\n", timer, tchnl, ('A' + (pin >> 4)), (pin & 0x0F));
return FALSE;
}

    // relevant RCC register & bit
    __IO uint32_t* enReg = &RCC->APB1ENR;
    if ((UINT32)treg & 0x10000) enReg = &RCC->APB2ENR;
    int enBit = 1 << (((UINT32)treg >> 10) & 0x1F);

    if (!(*enReg & enBit)) { // not yet initialized
        *enReg |= enBit; // enable timer clock
        treg->CR1 = TIM_CR1_URS | TIM_CR1_ARPE; // double buffered update
        treg->EGR = TIM_EGR_UG; // enforce first update
        if (timer == 1 || timer == 8) {
            treg->BDTR |= TIM_BDTR_MOE; // main output enable (timer 1 & 8 only)
        }
    }

    *(__IO uint16_t*)&((uint32_t*)&treg->CCR1)[tchnl] = 0; // reset compare register

    // 激活PWM通道
    UINT32 mode = TIM_CCMR1_OC1M_1 | TIM_CCMR1_OC1M_2 | TIM_CCMR1_OC1PE; //

WM1 mode, double buffered
    if (tchnl & 1) mode <<= 8; // 1 or 3
    __IO uint16_t* reg = &treg->CCMR1;
    if (tchnl & 2) reg = &treg->CCMR2; // 2 or 3
    *reg |= mode;

    return TRUE;
}

TIM1和TIM8都需要设置那个

STM32学徒 · 发表于 2014-3-14 11:03:40

我用的是库函数写的，定时器1怎么没有输出PWM波呢？
#include "stm32f10x.h"
void TIM1_Config(void)
{
  TIM_TimeBaseInitTypeDef  TIM1_TimeBaseStructure;
  TIM_OCInitTypeDef TIM1_OCInitStructure;
  GPIO_InitTypeDef  GPIO_InitStructure;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);//使能GPIOA口时钟
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);   //使能TIM1时钟
  //GPIO配置为：PA8输出
  GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8;
  GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;    //推免输出
  GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz; //I/O电平翻转速度
  GPIO_Init(GPIOA,&GPIO_InitStructure);
  //定时器基本配置
  TIM1_TimeBaseStructure.TIM_Period=1000-1;   //计数值为1000
  TIM1_TimeBaseStructure.TIM_Prescaler=3-1;   //3分频
  TIM1_TimeBaseStructure.TIM_ClockDivision=0;   //采样分频0
  TIM1_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM1,&TIM1_TimeBaseStructure);
  TIM1_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1; //管脚输出模式
  TIM1_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High;
  //PWM1模式通道1
  TIM1_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;
  TIM1_OCInitStructure.TIM_Pulse=250;
  TIM_OC1Init(TIM1,&TIM1_OCInitStructure);    //初始化TIM1
  TIM_OC1PreloadConfig(TIM1,TIM_OCPreload_Enable);
  TIM_ARRPreloadConfig(TIM1,ENABLE);  //使能TIM1在ARR上的预装载寄存器
  TIM_ClearFlag(TIM1,TIM_FLAG_CC1);//清除中断
  TIM_ITConfig(TIM1,TIM_IT_CC1,ENABLE); //开启中断
  TIM_CtrlPWMOutputs(TIM1,ENABLE);  //PWM主输出使能，即使刹车寄存器的MOE位置1
  TIM_Cmd(TIM1,DISABLE);   //失能定时器1
}
void NVIC_Config(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
  NVIC_InitStructure.NVIC_IRQChannel=TIM1_CC_IRQn;    //输出比较
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority=0;
  NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}
int main(void)
{
    SystemInit();
    TIM1_Config();
    NVIC_Config();
    TIM_Cmd(TIM1,ENABLE);   //开启TIM1，TIM1开始输出PWM
    while(1);
}