STM32F103 16路PWM 配置

1. 前言

底层库:基于原子的标准库函数
适用芯片:STM32F103系列型号芯片,其他型号未测试(注:已测型号:C8T6、CBT6、RCT6、RET6、ZET6)
所用到的定时器:TIM1、TIM2、TIM3、TIM4
所用的IO口:TIM1:PA8 PA9 PA10 PA11;TIM2:PA0 PA1 PA2 PA3 ;TIM3:PA6 PA7 PB0 PB1 TIM4:PB6 PB7 PB8 PB9
输出:16路PWM,占空比0-100可调,频率1KHz

2. TIM PWM对应IO配置表

STM32F103 16路PWM 配置_第1张图片

3. TIM1 PWM配置

**注意!!! 高级定时器必须加上在初始化末尾加上:TIM_CtrlPWMOutputs(TIM1, ENABLE);

//TIM1 PWM部分初始化 
//PWM输出初始化
//arr:自动重装值
//psc:时钟预分频数
void TIM1_PWM_Init(uint16_t arr,uint16_t psc)
{  
	GPIO_InitTypeDef GPIO_InitStructure;
	TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
	TIM_OCInitTypeDef  TIM_OCInitStructure;
	

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);	//使能定时器3时钟
 	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);  //使能GPIO外设和AFIO复用功能模块时钟
	//RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);        //IO 复用
    
    
    //GPIO_PinRemapConfig(GPIO_PartialRemap_TIM1, ENABLE);  //TIM1的部分重映射,加这句,并修改IO配置    
    //GPIO_PinRemapConfig(GPIO_FullRemap_TIM1, ENABLE);     //TIM1的完全重映射,加这句,并修改IO配置
    
    //没有重映射时,TIM1的四个通道CH1,CH2,CH3,CH4分别对应   PA8     PA9     PA10    PA11
    //部分重映射时,TIM1的四个通道CH1,CH2,CH3,CH4分别对应   PA8     PA9     PA10    PA11
    //完全重映射时,TIM1的四个通道CH1,CH2,CH3,CH4分别对应   PE7     PE9     PE11    PE13
    
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10|GPIO_Pin_11; 
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIO
 
   //初始化TIM1
	TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值
	TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值 
	TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim
	TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
	TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位
	
    TIM_OCInitStructure.TIM_Pulse = 0; 
    
	//初始化TIM3 Channel2 PWM模式	 
	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //选择定时器模式:TIM脉冲宽度调制模式2
 	TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
	TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高
	
    TIM_OC1Init(TIM1, &TIM_OCInitStructure);
    TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);
    
    TIM_OC2Init(TIM1, &TIM_OCInitStructure);  //根据T指定的参数初始化外设
    TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);  //使能TIM3在CCR2上的预装载寄存器
    
    TIM_OC3Init(TIM1, &TIM_OCInitStructure);
	TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);
    
    TIM_OC4Init(TIM1, &TIM_OCInitStructure);    
    TIM_OC4PreloadConfig(TIM1, TIM_OCPreload_Enable);
    
	TIM_Cmd(TIM1, ENABLE);  //使能TIM3
    TIM_CtrlPWMOutputs(TIM1, ENABLE);                             //高级定时器必须使能 pwm输出
    
	TIM_SetCompare1(TIM1,0);        //占空比 = 0 / TIM_Period * 100%  
    TIM_SetCompare2(TIM1,0);
    TIM_SetCompare3(TIM1,0);
    TIM_SetCompare4(TIM1,0);
}

4. TIM2 PWM配置


//TIM2 PWM部分初始化 
//PWM输出初始化
//arr:自动重装值 占空比 = 0 / TIM_Period * 100% 
//psc:时钟预分频数
void TIM2_PWM_Init(uint16_t arr,uint16_t psc)
{  
	GPIO_InitTypeDef GPIO_InitStructure;
	TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
	TIM_OCInitTypeDef  TIM_OCInitStructure;
	

	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);	//使能定时器3时钟
 	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);  //使能GPIO外设和AFIO复用功能模块时钟
	//RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);        //IO 复用
    
    
    //GPIO_PinRemapConfig(GPIO_PartialRemap1_TIM2, ENABLE);     //TIM2的部分重映射 1,加这句,并修改IO配置   
    //GPIO_PinRemapConfig(GPIO_PartialRemap2_TIM2, ENABLE);     //TIM2的部分重映射 2,加这句,并修改IO配置    
    //GPIO_PinRemapConfig(GPIO_FullRemap_TIM2, ENABLE);         //TIM2的完全重映射  ,加这句,并修改IO配置    
    
    //没有重映射,TIM2的四个通道CH1,CH2,CH3,CH4分别对应    PA0     PA1	PA2	 PA3
    //部分重映射 1,TIM2的四个通道CH1,CH2,CH3,CH4分别对应  PA15    PB3	PA2	 PA3
    //部分重映射 2,TIM2的四个通道CH1,CH2,CH3,CH4分别对应  PA0     PA1	PB10 PB11
    //完全重映射,TIM2的四个通道CH1,CH2,CH3,CH4分别对应    PA15    PB3	PB10 PB11

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3; 
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIO
 
   //初始化TIM1
	TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值
	TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值 
	TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim
	TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
	TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位
	
    TIM_OCInitStructure.TIM_Pulse = 0; 
     
	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //选择定时器模式:TIM脉冲宽度调制模式2
 	TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
	TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高
	
    TIM_OC1Init(TIM2, &TIM_OCInitStructure);
    TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable);
    
    TIM_OC2Init(TIM2, &TIM_OCInitStructure);  //根据T指定的参数初始化外设
    TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable);  //使能TIM3在CCR2上的预装载寄存器
    
    TIM_OC3Init(TIM2, &TIM_OCInitStructure);
	TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);
    
    TIM_OC4Init(TIM2, &TIM_OCInitStructure);    
    TIM_OC4PreloadConfig(TIM2, TIM_OCPreload_Enable);
    
	TIM_Cmd(TIM2, ENABLE);  //使能TIM2
    
	TIM_SetCompare1(TIM2,0);        //占空比 = 0 / TIM_Period * 100%  
    TIM_SetCompare2(TIM2,0);
    TIM_SetCompare3(TIM2,0);
    TIM_SetCompare4(TIM2,0);
}

5. TIM3 PWM配置


//TIM3 PWM部分初始化 
//PWM输出初始化
//arr:自动重装值
//psc:时钟预分频数
void TIM3_PWM_Init(uint16_t arr,uint16_t psc)
{  
	GPIO_InitTypeDef GPIO_InitStructure;
	TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
	TIM_OCInitTypeDef  TIM_OCInitStructure;
	

	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);	//使能定时器3时钟
 	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB  , ENABLE);  //使能GPIO外设和AFIO复用功能模块时钟
	//RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);        //IO 复用
    //GPIO_PinRemapConfig(GPIO_PartialRemap_TIM3, ENABLE);  //TIM3的部分重映射,加这句,并修改IO配置    
    //GPIO_PinRemapConfig(GPIO_FullRemap_TIM3, ENABLE);     //TIM3的完全重映射,加这句,并修改IO配置
    
    //当没有重映射时,TIM3的四个通道CH1,CH2,CH3,CH4分别对应  PA6   PA7   PB0     PB1
    //当部分重映射时,TIM3的四个通道CH1,CH2,CH3,CH4分别对应  PB4   PB5   PB0     PB1
    //当完全重映射时,TIM3的四个通道CH1,CH2,CH3,CH4分别对应  PC6   PC7   PC8     PC9 
 
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7; 
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIO
    
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1; //TIM_CH2 
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIO
 
   //初始化TIM3
	TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值
	TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值 
	TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim
	TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
	TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位
	
    TIM_OCInitStructure.TIM_Pulse = 0; 
    
	//初始化TIM3 Channel2 PWM模式	 
	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //选择定时器模式:TIM脉冲宽度调制模式2
 	TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
	TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高
	
    TIM_OC1Init(TIM3, &TIM_OCInitStructure);
    TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);
    
    TIM_OC2Init(TIM3, &TIM_OCInitStructure);  //根据T指定的参数初始化外设
    TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);  //使能TIM3在CCR2上的预装载寄存器
    
    TIM_OC3Init(TIM3, &TIM_OCInitStructure);
	TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);
    
    TIM_OC4Init(TIM3, &TIM_OCInitStructure);    
    TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);
    
	TIM_Cmd(TIM3, ENABLE);  //使能TIM3
    
	TIM_SetCompare1(TIM3,0);        //占空比 = 0 / TIM_Period * 100%  
    TIM_SetCompare2(TIM3,0);
    TIM_SetCompare3(TIM3,0);
    TIM_SetCompare4(TIM3,0);

6. TIM4 PWM配置


//TIM4 PWM部分初始化 
//PWM输出初始化
//arr:自动重装值
//psc:时钟预分频数
void TIM4_PWM_Init(uint16_t arr,uint16_t psc)
{  
	GPIO_InitTypeDef GPIO_InitStructure;
	TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
	TIM_OCInitTypeDef  TIM_OCInitStructure;
	

	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);	//使能定时器3时钟
 	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB  , ENABLE);  //使能GPIO外设和AFIO复用功能模块时钟
	//RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);        //IO 复用
    //GPIO_PinRemapConfig(GPIO_Remap_TIM4, ENABLE);     //TIM4的完全重映射,加这句,并修改IO配置
    
    //当没有重映射时,TIM4的四个通道CH1,CH2,CH3,CH4分别对应  PB6     PB7     PB8     PB9
    //当完全重映射时,TIM4的四个通道CH1,CH2,CH3,CH4分别对应  PD12    PD13    PD14    PD15 
    
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9; 
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIO
 
   //初始化TIM4
	TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值
	TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值 
	TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim
	TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
	TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位
	
    TIM_OCInitStructure.TIM_Pulse = 0; 
    
	//初始化TIM3 Channel2 PWM模式	 
	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //选择定时器模式:TIM脉冲宽度调制模式2
 	TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
	TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高
	
    TIM_OC1Init(TIM4, &TIM_OCInitStructure);
    TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Enable);
    
    TIM_OC2Init(TIM4, &TIM_OCInitStructure);  //根据T指定的参数初始化外设
    TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Enable);  //使能TIM3在CCR2上的预装载寄存器
    
    TIM_OC3Init(TIM4, &TIM_OCInitStructure);
	TIM_OC3PreloadConfig(TIM4, TIM_OCPreload_Enable);
    
    TIM_OC4Init(TIM4, &TIM_OCInitStructure);    
    TIM_OC4PreloadConfig(TIM4, TIM_OCPreload_Enable);
    
	TIM_Cmd(TIM4, ENABLE);  //使能TIM3
    
	TIM_SetCompare1(TIM4,0);        //占空比 = 0 / TIM_Period * 100%  
    TIM_SetCompare2(TIM4,0);
    TIM_SetCompare3(TIM4,0);
    TIM_SetCompare4(TIM4,0);

初始化参数

TIM1_PWM_Init(100-1,720-1);	 //PWM频率=72M/(100*720)=1Khz
TIM2_PWM_Init(100-1,720-1);	 //PWM频率=72M/(100*720)=1Khz
TIM3_PWM_Init(100-1,720-1);	 //PWM频率=72M/(100*720)=1Khz
TIM4_PWM_Init(100-1,720-1);	 //PWM频率=72M/(100*720)=1Khz

7. 总结

1—TIM1为高级定时器,初始化时需要加上:TIM_CtrlPWMOutputs(TIM1, ENABLE);
2—TIM2部分重映射有两组
3—TIM4不区分部分和完全重映射,统为重映射,重映射配置时参数为GPIO_Remap_TIM4
4—在PWM输出频率为1KHz时,对于大部分隔离芯片会有意想不到的优势

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