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详解STM32高级定时器-PWM简单学习案例

作者:时间:2018-08-01来源:网络收藏

高级与通用比较类似,下面是一个TIM1 的 程序,TIM1是唯一的高级。共有4个通道有死区有互补。

本文引用地址:http://www.eepw.com.cn/article/201808/384919.htm

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_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

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_2; //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 “Lib\\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);

}

}

}

}


  • 单片机中文官网
  • STM32单片机官方开发工具
  • STM32单片机参考设计


关键词: STM32 定时器 PWM

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