2024年1月15日发(作者：)

STM32日记之TIM1模块产生PWM（分别用库函数和寄存器）

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__Pin=GPIO_Pin_8| GPIO_Pin_9;

GPIO__Mode=GPIO_Mode_AF_PP;

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__Pin=GPIO_Pin_13| GPIO_Pin_14;

GPIO__Mode=GPIO_Mode_AF_PP;

GPIO__Speed=GPIO_Speed_50MHz;

GPIO_Init(GPIOB, &GPIO_InitStructure);

//Step3. TIM模块初始化

void TIM_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__Period = 1000-1;

TIM__Prescaler = 72-1;

TIM__ClockDivision = 0;

TIM__CounterMode

TIM_CounterMode_Up;

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__OCMode = TIM_OCMode_PWM1;

TIM__OutputState

TIM_OutputState_Enable;

TIM__OutputNState

TIM_OutputNState_Enable;

TIM__OCPolarity = TIM_OCPolarity_High;

TIM__OCNPolarity

TIM_OCNPolarity_High;

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__OutputState

TIM_OutputState_Enable;

TIM__OutputNState =

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=

TIM_OutputNState_Enable;

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__OSSRState

TIM_OSSRState_Enable;

TIM__OSSIState

TIM_OSSIState_Enable;

TIM__LOCKLevel

TIM_LOCKLevel_OFF;

TIM__DeadTime = 0x90; //这里调整死区大小0-0xff

TIM__Break = TIM_Break_Disable;

TIM__BreakPolarity

TIM_BreakPolarity_High;

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

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#include

#include"PWM.h" // 头文件

#include"IOSET.h" // 包含io口设置头文件

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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;

PB13PB14,15//TIM1CH1N,TIM1CHH2N

//

CH3N设输定出

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;

}