用定時器PWM輸出

配置定時器

void TIME5_config(void)

{

TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;//時基結(jié)構(gòu)體

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE);//使能時鐘

TIM_TimeBaseInitStruct.TIM_Prescaler = 90-1;? ? ? //分頻系數(shù)

TIM_TimeBaseInitStruct.TIM_Period? ? = 100 -1;? ? //范圍：1-65535配置ARR

TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up; //上拉

TIM_TimeBaseInitStruct.TIM_ClockDivision? = TIM_CKD_DIV1;

TIM_TimeBaseInit(TIM5, &TIM_TimeBaseInitStruct);//初始化

}

配置通道

void TIME5_OC1_config(void)

{

TIM_OCInitTypeDef? TIM_OCInitStruct;//通道結(jié)構(gòu)體

TIM_OCInitStruct.TIM_OCMode = TIM_OCMode_PWM1;//CCR前部有效

TIM_OCInitStruct.TIM_OutputState = TIM_OutputState_Enable;//輸出使能

TIM_OCInitStruct.TIM_OCNPolarity = TIM_OCPolarity_Low;//輸出低有效

TIM_OCInitStruct.TIM_Pulse? ? ? = 0;//初始CCR的數(shù)值

TIM_OC1Init(TIM5, &TIM_OCInitStruct);//初始化通道

TIM_Cmd(TIM5, ENABLE);//使能整個時鐘

}