STM32日记之TIM1模块产生PWM(分别用库函数和寄存器).doc

C语言: TIM1模块产生PWM，带死区
//Step1.开启TIM和相应端口时钟
//启动GPIO
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | \
RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD,\
ENABLE);
//启动AFIO
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
//启动TIM1
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

//Step2. GPIO做相应设置，为AF输出
//PA.8/9口设置为TIM1的OC1输出口
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8| GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);

//PB.13/14口设置为TIM1_CH1N和TIM1_CH2N输出口
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_13| GPIO_Pin_14;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);

//Step3. TIM模块初始化
voidTIM_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_BaseInitStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;

//TIM1基本计数器设置（设置PWM频率）
//频率=TIM1_CLK/(ARR+1)
TIM_BaseInitStructure.TIM_Period = 1000-1;
TIM_BaseInitStructure.TIM_Prescaler = 72-1;
TIM_BaseInitStructure.TIM_ClockDivision = 0;
TIM_BaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_BaseInitStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM1, &TIM_BaseInitStructure);
//启用ARR的影子寄存器（直到产生更新事件才更改设置）
TIM_ARRPreloadConfig(TIM1, ENABLE);

//TIM1_OC1模块设置设置1通道占空比）
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
TIM_OCInitStructure.TIM_Pulse = 120; //TIM1_Pulse设置了待装入捕获比较寄存器的脉冲值
TIM_OC1Init(TIM1, &TIM_OCInitStructure);
//启用CCR1寄存器的影子寄存器（直到产生更新事件才更改设置）
TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);

//TIM2_OC2模块设置（设置2通道占空比）
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_Pulse = 680;
TIM_OC2Init(TIM1, &TIM_OCInitStructure);
//启用CCR2寄存器的影子寄存器（直到产生更新事件才更改设置）
TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);

//死区设置
TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF;
TIM_BDTRInitStructure.TIM_DeadTime = 0x90; //这里调整死区大小0-0xff
TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);

//TIM1开启
TIM_Cmd(TIM1, ENABLE);
//TIM1_OC通道输出PWM（一定要加）
TIM_CtrlPWMOutputs(TIM1, ENABLE);

}

另一程序
---------------------------------
#include
#include"PWM.h"            // 头文件
#include"IOSET.h"     // 包含io口设置头文件
u16 pw1=0;
u16 pw2=5600;
u16 pw3=2800;
void PWM_Init( u16  arr,u16 psc)    //PWM初始化程序
   {
  RCC->APB2ENR|=1<<11;      // 使能定时器1时钟
  RCC->APB2ENR|=1<<2;               //使能IO口A时钟
  RCC->APB2ENR|=1<<3;               //使能IO口B时钟

  RCC->APB2ENR|=1<<0;               //开启辅助时钟
  GPIOB->CRH&=0X000FFFFF;     // 清除PB13PB14,15状态寄存器位 
  GPIOB->CRH|=0XBBB00000;     // 设定PB13PB14,15//TIM1CH1N,TIM1CHH2N CH3N输出
  GPIOA->CRH&=0XFFFFF000;     // 清除PA8,9,10状态寄存器位 
  GPIOA->CRH|=0X00000BBB;     // 设定PA8,9,10为复用功能TIM1CH1,2,3输出
  GPIOB->ODR|=1<<13;
  GPIOB->ODR|=1<<14;
  GPIOB->ODR|=1<<15;       // 输出上拉，低电平有效
  GPIOA->ODR|=1<<8;
  GPIOA->ODR|=1<<9;
  GPIOA->ODR|=1<<10;
  TIM1->CCR1=pw1;                //捕获比较预装载值
  TIM1->CCR2=pw2;
  TIM1->CCR3=pw3;

  TIM1->ARR=arr;        // 设定计数器自动重装值     
  TIM1->PSC=psc;        // 预分频器不分频
  TIM1->BDTR|=0xCD;        // 死区时间设定
  TIM1->CCER|=1<<0;                 // TIM1CH1 通道开关 
   TIM1->CCER|=1<<2;                 // TIM1CH1N 通道开关
  TIM1->CCER|=1<<4;       // TIM1CH2 通道开关
  TIM1->CCER|=1<<6;                 // TIM4CH2N 通道开关
  TIM1->CCER|=1<<8;       // TIM4CH3 通道开关
  TIM1->CCER|=1<<10;                // TIM4CH3N 通道开关

  TIM1->CCMR1|=7<<4;       // TIM1CH1 PWM2模式
  TIM1->CCMR1|=7<<12;      // TIM1CH2 PWM2模式
  TIM1->CCMR2|=7<<4;       // TIM1CH3 PWM2模式
  TIM1->CCMR1|=1<<3;       // TIM1CH1 预装载使能
  TIM1->CCMR1|=1<<11;      // TIM1CH2 预装载使能
  TIM1->CCMR2|=1<<3;       // TIM1CH3 预装载使能
     TIM1->CR1|=0X80;       // CR1 ARPE自动重装载预装载允许位使能
  TIM1->BDTR|=1<<15;       // 刹车使能位置1，开启所有输出通道
  TIM1->CR1|=0X01;       // 使能定时计数器1
  //TIM1->EGR|=1<<0;
 }