void PWM_GPIO_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB,ENABLE);//使能GPIO時鐘
//正極性輸出引腳PA.8-->TIM1_CH1,PA.9-->TIM1_CH2,PA.10-->TIM1_CH2
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10; //PA8 PA11
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP; //復用推挽輸出
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure); //使能GPIOA
//反極性輸出引腳PB.13-->TIM1_CH1N,PB.14-->TIM1_CH2N,PB.15-->TIM1_CH3N
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15; //PA8 PA11
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP; //復用推挽輸出
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOB,&GPIO_InitStructure); //使能GPIOB
}
/***************************************************************
* Function : TIMx_PWM_Init
* Description : PWM初始化
* Input : None
* Output : None
* Return : None
* Declaration : 定時器的初始化
****************************************************************/
void PWM_TIMx_Init(uint16_t arr,uint16_t psc)
{
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);
TIM_DeInit(TIM1); //定時器1復位
/*定時器1初始化*/
TIM_TimeBaseStructure.TIM_Period=arr; //自動重裝載值
TIM_TimeBaseStructure.TIM_Prescaler=psc; //預分頻系數(shù)
TIM_TimeBaseStructure.TIM_ClockDivision=0X00; //設置時鐘分割TDTS==tck_Tim
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; //向上計數(shù)模式
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
TIM_ARRPreloadConfig(TIM1,DISABLE); //禁止ARR預裝緩沖器
/*雙路互補PWM初始化*/
TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1; //TIM_OCMode_PWM1
TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable; //正極性輸出使能
TIM_OCInitStructure.TIM_OutputNState=TIM_OutputNState_Enable; //互補極性輸出使能
TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High; //PWM輸出極性
TIM_OCInitStructure.TIM_OCNPolarity=TIM_OCPolarity_High; //PWM互補極性
TIM_OCInitStructure.TIM_Pulse=450; //占空比
TIM_OCInitStructure.TIM_OCIdleState=TIM_OCIdleState_Set; //死區(qū)后輸出狀態(tài)
TIM_OCInitStructure.TIM_OCNIdleState=TIM_OCIdleState_Reset; //死區(qū)后互補極性輸出狀態(tài)
//初始化3路正極性PWM：PA.8，PA.9，PA.10
TIM_OC1Init(TIM1,&TIM_OCInitStructure);
TIM_OCInitStructure.TIM_Pulse=350;
TIM_OC2Init(TIM1,&TIM_OCInitStructure);
TIM_OCInitStructure.TIM_Pulse=250;
TIM_OC3Init(TIM1,&TIM_OCInitStructure);
//配置3路正極性PWM
//TIM_OC1PolarityConfig(TIM1,TIM_OCPreload_Enable);//PWM通道1預裝載使能
//TIM_OC2PolarityConfig(TIM1,TIM_OCPreload_Enable);//PWM通道2預裝載使能
//TIM_OC3PolarityConfig(TIM1,TIM_OCPreload_Enable);//PWM通道3預裝載使能
//死區(qū)和剎車配置功能僅僅對TIM1和TIM8高級定時器有效
TIM_BDTRInitStructure.TIM_OSSIState=TIM_OSSIState_Enable; //空閑模式下的輸出使能
TIM_BDTRInitStructure.TIM_OSSRState=TIM_OSSRState_Enable; //運行模式下的輸出使能
TIM_BDTRInitStructure.TIM_LOCKLevel=TIM_LOCKLevel_OFF; //鎖定設置
TIM_BDTRInitStructure.TIM_DeadTime=0X00; //設置死區(qū)時間2us
TIM_BDTRInitStructure.TIM_Break=TIM_Break_Disable; //剎車功能關(guān)閉
TIM_BDTRInitStructure.TIM_BreakPolarity=TIM_BreakPolarity_Low; //剎車輸入極性
TIM_BDTRInitStructure.TIM_AutomaticOutput=TIM_AutomaticOutput_Disable;//關(guān)閉自動輸出使能
TIM_BDTRConfig(TIM1,&TIM_BDTRInitStructure);
//高級定時器的輸出控制使能剎車MOE主輸出使能
TIM_CtrlPWMOutputs(TIM1,ENABLE);
TIM_ARRPreloadConfig(TIM1,ENABLE);
//定時器使能
TIM_Cmd(TIM1,ENABLE);
}
STM32F103C8T6 IO口PA.8 PA.9 PA.10 PB.13 PB.14 PB.15 注釋這三句后：波形 //TIM_OC1PolarityConfig(TIM1,TIM_OCPreload_Enable);//PWM通道1預裝載使能 //TIM_OC2PolarityConfig(TIM1,TIM_OCPreload_Enable);//PWM通道2預裝載使能 //TIM_OC3PolarityConfig(TIM1,TIM_OCPreload_Enable);//PWM通道3預裝載使能 未注釋的波形： TIM_OC1PolarityConfig(TIM1,TIM_OCPreload_Enable);//PWM通道1預裝載使能 TIM_OC2PolarityConfig(TIM1,TIM_OCPreload_Enable);//PWM通道2預裝載使能 TIM_OC3PolarityConfig(TIM1,TIM_OCPreload_Enable);//PWM通道3預裝載使能
未注釋的仿真波形
注釋后仿真波形
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