高級(jí)定時(shí)器與通用定時(shí)器比較類似，下面是一個(gè)TIM1 的PWM 程序,TIM1是STM32唯一的高級(jí)定時(shí)器。共有4個(gè)通道有死區(qū)有互補(bǔ)。

先是配置IO腳：

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); //重設(shè)為缺省值

TIM_TimeBaseStructure.TIM_Prescaler = 4000;//預(yù)分頻(時(shí)鐘分頻)72M/4000=18K
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//向上計(jì)數(shù)
TIM_TimeBaseStructure.TIM_Period = 144;//裝載值 18k/144=125hz 就是說(shuō)向上加的144便滿了
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;//設(shè)置了時(shí)鐘分割不懂得不管
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0x0;//周期計(jì)數(shù)器值不懂得不管
TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);//初始化TIMx的時(shí)間基數(shù)單位

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; //占空時(shí)間144 中有40的時(shí)間為高，互補(bǔ)的輸出正好相反
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //輸出極性
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low;//互補(bǔ)端的極性
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;//空閑狀態(tài)下的非工作狀態(tài)不管
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;//先不管

TIM_OC1Init(TIM1,&TIM_OCInitStructure); //數(shù)初始化外設(shè)TIMx通道1這里2.0庫(kù)為TIM_OCInit

TIM_Cmd(TIM1,ENABLE);


TIM_CtrlPWMOutputs(TIM1,ENABLE);
}

//設(shè)置捕獲寄存器1
void SetT1Pwm1(u16 pulse)
{
TIM1->CCR1=pulse;
}

//在MAIN 中加點(diǎn)鍵盤掃描啥的用來(lái)改變占空比

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

extern void SetT1Pwm1(u16 pulse);

int main(void)
{
u16 pulse=40;
ChipHalInit();//片內(nèi)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);
}
}
}


}