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GPIORCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD, ENABLE);/启动AFIORCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);/启动TIM1RCC_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#includePWM.h / 头文件#includeIOSET.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|=1APB2ENR|=1APB2ENR|=1APB2ENR|=1CRH&=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|=1ODR|=1ODR|=1ODR|=1ODR|=1ODR|=1CCR1=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