【STM32】高级定时器、通用定时器和基本定时器---配置寄存器产生PWM

1、高级定时器和通用定时器

高级定时器：TIM1、TIM8
Tips：黄色词条为高级定时器相对于通用定时器的功能。

通用定时器：TIM2~TIM5

基本定时器：TIM6、TIM7
Tips：独有触发DAC的同步电路。

2、配置产生PWM

计算公式为：溢出时间Tout（单位秒）=(arr+1)(psc+1)/Tclk
计算实例：20MS = (59999+1)*(23+1)/72000000
arr->系统自动装填数字;psc->预分频系数
使用F103C8系列单片机产生PWM

#include "Sys.h"
//公式为：溢出时间Tout（单位秒）=(arr+1)(psc+1)/Tclk
//20MS = (59999+1)*(23+1)/72000000
void ServoInit()//定时器1产生50HZ的PWM
{
	GPIO_InitTypeDef GPIO;
	TIM_OCInitTypeDef TIM_OC;
	TIM_TimeBaseInitTypeDef TIM_Time;
	
	//RCC_APB1PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_TIM1,ENABLE);
	//IO配置
	GPIO.GPIO_Pin = GPIO_Pin_11;
	GPIO.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO.GPIO_Mode = GPIO_Mode_AF_PP;//复用推挽
	GPIO_Init(GPIOA,&GPIO);
	//PWM模式及通道设置
	TIM_OC.TIM_OCMode = TIM_OCMode_PWM1;//CNT<CCR1为有效电平
	TIM_OC.TIM_OCPolarity = TIM_OCPolarity_High;//有效电平：高电平
	TIM_OC.TIM_OutputState = TIM_OutputState_Enable;//输出使能
	TIM_OC4Init(TIM1,&TIM_OC);
	TIM_OC4PreloadConfig(TIM1,TIM_OCPreload_Enable);
	//PWM周期设置
	TIM_Time.TIM_Period = 60000-1;//系统自动装填数字
	TIM_Time.TIM_Prescaler = 24-1;//预分频系数
	TIM_Time.TIM_CounterMode = TIM_CounterMode_Up;//向上计数溢出
	TIM_Time.TIM_ClockDivision = TIM_CKD_DIV1;//时钟分频因子
	TIM_Time.TIM_RepetitionCounter = 0;
	TIM_TimeBaseInit(TIM1,&TIM_Time);
	
	TIM_Cmd(TIM1,ENABLE);//定时器使能
	TIM_CtrlPWMOutputs(TIM1, ENABLE);//pwm输出高级定时器特有
	//舵机归中
	TIM_SetCompare4(TIM1,4500);//舵机归中4500
}

void MotoInit(void)//定时器4产生1200HZ的PWM
{
	GPIO_InitTypeDef GPIO;
	TIM_OCInitTypeDef TIM_OC;
	TIM_TimeBaseInitTypeDef TIM_Time;
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4,ENABLE);
	GPIO.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9;
	GPIO.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO.GPIO_Mode = GPIO_Mode_AF_PP;
	GPIO_Init(GPIOB,&GPIO);
	
	TIM_OC.TIM_OCMode = TIM_OCMode_PWM1;
	TIM_OC.TIM_OutputState = TIM_OutputState_Enable;
	TIM_OC.TIM_OCPolarity = TIM_OCPolarity_High;
	TIM_OC1Init(TIM4,&TIM_OC);
	TIM_OC2Init(TIM4,&TIM_OC);
	TIM_OC3Init(TIM4,&TIM_OC);
	TIM_OC4Init(TIM4,&TIM_OC);
	
	TIM_Time.TIM_Prescaler = 0;
	TIM_Time.TIM_CounterMode = TIM_CounterMode_Up;
	TIM_Time.TIM_Period = 60000-1;
	TIM_Time.TIM_ClockDivision = TIM_CKD_DIV1;
	TIM_TimeBaseInit(TIM4,&TIM_Time);
	
	TIM_Cmd(TIM4,ENABLE);
	MotoControl(0,0);
}