STM32 general timer output PWM control steering gear

stm32 The general timers are TIM2、TIM3、TIM4、TIM5, Each timer has four independent channels that can be used as ： Input capture 、 Output comparison 、PWM Output 、 Single pulse mode output, etc .stm32 In addition to the basic timer , Other timers can output PWM.PWM It is commonly used to control steering gear and motor . I learned it today stm32 How to output the general timer of single chip microcomputer PWM Control of steering gear , It is summarized as follows ：

Step summary ：

To configure GPIO Structure （ here GPIO It is a pin with multiplexing function ）-> Configure the general timer structure -> Configure timer output PWM Structure -> Enable preload register -> Enable timer -> To configure PWM It's worth -> Control of steering gear

ServoMotor.c:

#include "stm32f10x.h"
#include "ServoMotor.h"

void ServoMotor_Config(void)
{
	GPIO_InitTypeDef GPIO_MOTORInitStructure;
	TIM_TimeBaseInitTypeDef Tim_MOTORInitStructure;
	TIM_OCInitTypeDef Time_PWMInitStructure;
	// Turn on the clock 
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
	// Partial remapping 
	GPIO_PinRemapConfig(GPIO_PartialRemap_TIM3,ENABLE);
	// To configure GPIO Structure 
	GPIO_MOTORInitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
	GPIO_MOTORInitStructure.GPIO_Pin = GPIO_Pin_5;
	GPIO_MOTORInitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOB,&GPIO_MOTORInitStructure);
	// Configure the general timer structure 
	Tim_MOTORInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
	Tim_MOTORInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
	Tim_MOTORInitStructure.TIM_Period = 200-1;
	Tim_MOTORInitStructure.TIM_Prescaler = 7200-1;
	TIM_TimeBaseInit(TIM3,&Tim_MOTORInitStructure);
	// Configure timer output PWM Structure 
	Time_PWMInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
	Time_PWMInitStructure.TIM_OutputState = TIM_OutputState_Enable;
	Time_PWMInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
	TIM_OC2Init(TIM3,&Time_PWMInitStructure);
	// Enable preload register 
	TIM_OC2PreloadConfig(TIM3,TIM_OCPreload_Enable);
	// Enable timer 
	TIM_Cmd(TIM3,ENABLE);
}

main.c:

#include "stm32f10x.h"
#include "ServoMotor.h"

void delay(uint16_t time)
{
	uint16_t i = 0;
	while(time -- )
	{
		i = 12000;
		while(i -- );
	}
}

int main(void)
{
	ServoMotor_Config();
	uint16_t pwm = 155;
	while(1)
	{
		for(pwm = 195; pwm >=175; pwm-=5)
		{
			TIM_SetCompare2(TIM3,pwm);
			delay(500);
		}
	}
}

If there is a mistake , Please criticize and correct me