STM32 4路PWM配置完全函数:STM324路PWM配置完全函数:
void PWM_Configuration(void)//PWM初始化函数
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;//定时器初始化结构
TIM_OCInitTypeDef TIM_OCInitStructure;//通道输出初始化结构
GPIO_InitTypeDefGPIO_InitStructure;//输出通道的GPIO管脚结构
//(1)TIM3初始化,时间基部分
TIM_TimeBaseStructure.TIM_Period=999; //周期0~999
TIM_TimeBaseStructure.TIM_Prescaler =71; //时钟分频
TIM_TimeBaseStructure.TIM_ClockDivision =0; //时钟分割
TIM_TimeBaseStructure.TIM_CounterMode =TIM_CounterMode_Up;//模式
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure); //基本初始化
//TIM_ITConfig(TIM3, TIM_IT_CC4,ENABLE); //打开中断,中断需要这行代码
//(2)TIM3通道初始化 ,CCP部分
TIM_OCStructInit(&TIM_OCInitStructure); //默认参数
TIM_OCInitStructure.TIM_OCMode =TIM_OCMode_PWM1; //工作状态
TIM_OCInitStructure.TIM_OutputState =TIM_OutputState_Enable; //设定为输出,需要PWM输出才需要这行代码
TIM_OCInitStructure.TIM_Pulse =250; //占空长度
TIM_OCInitStructure.TIM_OCPolarity =TIM_OCPolarity_High; //高电平
TIM_OC4Init(TIM3,&TIM_OCInitStructure); //通道初始化 TIM_OCInitStructure.TIM_OCMode =TIM_OCMode_PWM1; //工作状态
TIM_OCInitStructure.TIM_OutputState =TIM_OutputState_Enable; //设定为输出,需要PWM输出才需要这行代码
TIM_OCInitStructure.TIM_Pulse =500; //占空长度
TIM_OCInitStructure.TIM_OCPolarity =TIM_OCPolarity_High; //高电平
TIM_OC3Init(TIM3,&TIM_OCInitStructure); //通道初始化
TIM_OC3Init(TIM3, &TIM_OCInitStructure); TIM_OCInitStructure.TIM_OCMode =TIM_OCMode_PWM1; //工作状态
TIM_OCInitStructure.TIM_OutputState =TIM_OutputState_Enable; //设定为输出,需要PWM输出才需要这行代码
TIM_OCInitStructure.TIM_Pulse =750; //占空长度
TIM_OCInitStructure.TIM_OCPolarity =TIM_OCPolarity_High; //高电平
TIM_OC2Init(TIM3, &TIM_OCInitStructure); TIM_OCInitStructure.TIM_OCMode =TIM_OCMode_PWM1; //工作状态
TIM_OCInitStructure.TIM_OutputState =TIM_OutputState_Enable; //设定为输出,需要PWM输出才需要这行代码
TIM_OCInitStructure.TIM_Pulse =900; //占空长度
TIM_OCInitStructure.TIM_OCPolarity =TIM_OCPolarity_High; //高电平
TIM_OC1Init(TIM3, &TIM_OCInitStructure);
TIM_Cmd(TIM3,ENABLE); //使能TIM3,到此在TIM中已配置完成,下面开始配置GPIO
//(3)PWM输出通道初始化
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9;//选择PC
GPIO_InitStructure.GPIO_Speed= GPIO_Speed_50MHz; //管脚频率为50MHZ
GPIO_InitStructure.GPIO_Mode =GPIO_Mode_AF_PP; //模式为推挽输出
GPIO_Init(GPIOC,&GPIO_InitStructure); //初始化GPIOA寄存器
GPIO_PinRemapConfig(GPIO_FullRemap_TIM3 ,ENABLE);
}
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