今天學(xué)習(xí)了用定時(shí)器PWM輸出
配置定時(shí)器
void TIME5_config(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;//時(shí)基結(jié)構(gòu)體
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE);//使能時(shí)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(gè)時(shí)鐘
}
