STM32高级定时器-PWM简单使用

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;

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);

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);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

TIM_TimeBaseInitTypeDefTIM_TimeBaseStructure;

TIM_OCInitTypeDefTIM_OCInitStructure;

void Tim1_Configuration(void)
{
TIM_TimeBaseInitTypeDefTIM_TimeBaseStructure;
TIM_OCInitTypeDefTIM_OCInitStructure;

TIM_DeInit(TIM1); //重设为缺省值

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

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

TIM_Cmd(TIM1,ENABLE);


TIM_CtrlPWMOutputs(TIM1,ENABLE);
}

//设置捕获寄存器1
void SetT1Pwm1(u16 pulse)
{
TIM1->CCR1=pulse;
}

//在MAIN 中加点键盘扫描啥的用来改变占空比

#include "STM32Lib\stm32f10x.h"
#include "hal.h"

extern void SetT1Pwm1(u16 pulse);

int main(void)
{
u16 pulse=40;
ChipHalInit();//片内硬件初始化
ChipOutHalInit();//片外硬件初始化

for(;;)
{
if(GET_UP())
{
while(GET_UP());
if(pulse<=144)
{
pulse+=5;
SetT1Pwm1(pulse);
}
}

if(GET_DOWN())
{
while(GET_DOWN());
if(pulse>30)
{
pulse-=5;
SetT1Pwm1(pulse);
}
}
}


}