STM32高级定时器日记之PWM

STM32高级定时器PWM实用程序

文章来源：本站原创作者：佚名

该文章讲述了STM32高级定时器PWM实用程序.

高级定时器与通用定时器比较类似，下面是一个TIM1 的PWM 程序,TIM1是STM32唯一的高级定时器。共有4个通道有死区有互补。

先是配置IO脚：

GPIO_InitTypeDef GPIO_InitStructure;

/* PA8设置为功能脚(PWM) */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOA, &GPIO_InitStructure);

/*PB13 设置为PWM的反极性输出*/

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOB, &GPIO_InitStructure);

/*开时钟PWM的与GPIO的*/

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

/*配置TIM1*/

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

TIM_OCInitTypeDef TIM_OCInitStructure;

void Tim1_Configuration(void)

{

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

TIM_OCInitTypeDef TIM_OCInitStructure;

TIM_DeInit(TIM1); //重设为缺省值

/*TIM1时钟配置*/

TIM_TimeBaseStructure.TIM_Prescaler = 4000; //预分频(时钟分

频)72M/4000=18K

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数TIM_TimeBaseStructure.TIM_Period = 144; //装载值18k/144=125hz 就是说向上加的144便满了

TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //设置了时钟分割不

懂得不管

TIM_TimeBaseStructure.TIM_RepetitionCounter = 0x0; //周期计数器值不懂得不管TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure); //初始化TIMx的时间基数单位/* Channel 1 Configuration in PWM mode 通道一的PWM */

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //PWM模式2

TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //正向通道有效PA8

TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; //反向通道也有效PB13

TIM_OCInitStructure.TIM_Pulse = 40; //占空时间144 中有40的时间为高，互补的输出正好相反

TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //输出极性

TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low; //互补端的极性TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset; //空闲状态下的非工作状态不管

TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset; //先不管TIM_OC1Init(TIM1,&TIM_OCInitStructure); //数初始化外设TIMx通道1这里2.0库为TIM_OCInit