12-STM32的PWM输出相关库函数

STM32的PWM输出相关库函数STM32的PWM输出相关库函数PWM相关的函数设置，是在库函数文件stm32f10x_tim.h和stm32f10x_tim.c文件中。开启TIM1时钟以及复用功能时钟，配置PE8和PE13为复用输出。要使用TIM1，必须先开启TIM1的时钟。还要配置PE8和PE13为复用输出，这是因为TIM1_CH1N和TIM1_CH3通道将重映射到PE8和PE13上，此时PE8和PE13属于复用功能输出。库函数使能TIM1时钟的方法如下：

库函数设置AFIO时钟的方法如下：

RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);STM32的PWM输出相关库函数设置TIM1_CH1N和TIM1_CH3重映射到PE8和PE13上。在stm32f10x_gpio.h头文件中都有定义，定时器的部分重映射代码如下：TIM1完全重映射的库函数实现方法代码如下：#defineGPIO_PartialRemap_TIM1((uint32_t)0x00160040)#defineGPIO_FullRemap_TIM1((uint32_t)0x001600C0)#defineGPIO_PartialRemap1_TIM2((uint32_t)0x00180100)#defineGPIO_PartialRemap2_TIM2((uint32_t)0x00180200)#defineGPIO_FullRemap_TIM2((uint32_t)0x00180300)#defineGPIO_PartialRemap_TIM3((uint32_t)0x001A0800)#defineGPIO_FullRemap_TIM3((uint32_t)0x001A0C00)#defineGPIO_Remap_TIM4((uint32_t)0x00001000)GPIO_PinRemapConfig(GPIO_FullRemap_TIM1,ENABLE);

STM32的PWM输出相关库函数初始化TIM1，设置TIM1的ARR和PSC开启TIM1的时钟之后，还要通过库函数的TIM_TimeBaseInit()函数来设置ARR和PSC两个寄存器的值，控制输出PWM的周期。TIM_TimeBaseStructure.TIM_Period=arr;TIM_TimeBaseStructure.TIM_Prescaler=psc;TIM_TimeBaseStructure.TIM_ClockDivision=0;TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);

STM32的PWM输出相关库函数设置TIM1_CH1N和TIM1_CH3的PWM模式，使能TIM1的CH1N和CH3输出在库函数中，PWM通道是通过TIM_OC1Init()～TIM_OC4Init()函数来设置的，这几个函数都在stm32f10x_tim.c文件中。不同通道的设置函数不一样，这里使用的是通道1和通道3，使用的函数是TIM_OC1Init()和TIM_OC3Init()。voidTIM_OC1Init(TIM_TypeDef*TIMx,TIM_OCInitTypeDef*TIM_OCInitStruct);voidTIM_OC3Init(TIM_TypeDef*TIMx,TIM_OCInitTypeDef*TIM_OCInitStruct); STM32的PWM输出相关库函数设置TIM1_CH1N和TIM1_CH3的PWM模式，使能TIM1的CH1N和CH3输出其中，定义结构体TIM_OCInitTypeDef的代码如下：typedefstruct{uint16_tuint16_tuint16_t

TIM_OutputNState;uint16_t

TIM_Pulse;uint16_tuint16_t

TIM_OCNPolarity;uint16_t

TIM_OCIdleState;uint16_t

TIM_OCNIdleState;}TIM_OCInitTypeDef;TIM_OCMode;TIM_OutputState;TIM_OCPolarity;STM32的PWM输出相关库函数设置TIM1_CH1N和TIM1_CH3的PWM模式，使能TIM1的CH1N和CH3输出TIM1_CH1N和TIM1_CH3为PWM1模式，并使能TIM1的CH1N和CH3输出,其代码如下：设置TIM1_CH1N为PWM模式1

TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1;TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;

TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High;

TIM_OC1Init(TIM1,&TIM_OCInitStructure);

TIM_OCInitTypeDefTIM_OCInitStructure;

STM32的PWM输出相关库函数设置TIM1_CH1N和TIM1_CH3的PWM模式，使能TIM1的CH1N和CH3输出TIM1_CH1N和TIM1_CH3为PWM1模式，并使能TIM1的CH1N和CH3输出设置TIM1_CH3为PWM模式1

TIM_OCMode_PWM1和TIM_OCMode_PWM2的宏定义在stm32f10x_tim.h头文件中TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1;TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High;TIM_OC3Init(TIM1,&TIM_OCInitStructure);

STM32的PWM输出相关库函数使能TIM1，修改TIM1_CCR1和TIM1_CCR3控制占空比出使能TIM1修改TIM1_