STM32 通用定时器产生多通道PWM输出，会相互影响，怎么办？？？？#define _CH1 1
#define _CH2 2
#define _CH3 3
#define _CH4 4
#define _CH5 5
#define _CH6 6
#define _CH7 7
#define _CH8 8
#define CH1_CH4_PWM_GPIO_CLK RCC_APB2Periph_GPIOC
#define CH1_CH4_PWM_CLK RCC_APB1Periph_TIM3
#define CH1_CH4_PWM TIM3
#define CH1_PWM_GPIO_PORT GPIOC
#define CH1_PWM_PIN GPIO_Pin_9
#define CH2_PWM_GPIO_PORT GPIOC
#define CH2_PWM_PIN GPIO_Pin_8
#define CH3_PWM_GPIO_PORT GPIOC
#define CH3_PWM_PIN GPIO_Pin_7
#define CH4_PWM_GPIO_PORT GPIOC
#define CH4_PWM_PIN GPIO_Pin_6
#define CH5_CH8_PWM_GPIO_CLK RCC_APB2Periph_GPIOB
#define CH5_CH8_PWM_CLK RCC_APB1Periph_TIM4
#define CH5_CH8_PWM TIM4
#define CH5_PWM_GPIO_PORT GPIOB
#define CH5_PWM_PIN GPIO_Pin_9
#define CH6_PWM_GPIO_PORT GPIOB
#define CH6_PWM_PIN GPIO_Pin_8
#define CH7_PWM_GPIO_PORT GPIOB
#define CH7_PWM_PIN GPIO_Pin_7
#define CH8_PWM_GPIO_PORT GPIOB
#define CH8_PWM_PIN GPIO_Pin_6
#define PWM_Freq (500 - 1)
/*******************************************************************************
** 名称: vLight_SetPWMInit
** 描述: 各通道PWM输出配置;
** 开启外设时钟及配置输出模式
**
** 输入: 无
** 输出: 无
********************************************************************************/
void vLight_SetPWMConfig(void)
{
/*PWM输出GPIO配置*/
vLight_PWMGpioInit();
/*PWM输出模式配置*/
vLight_PWMModeInit();
}
/*******************************************************************************
** 名称: vLight_PWMGpioInit
** 描述: PWM输出GPIO配置;
** 开启外设时钟及配置输出模式
**
** 输入: 无
** 输出: 无
********************************************************************************/
void vLight_PWMGpioInit(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/*使能外设时钟*/
RCC_APB2PeriphClockCmd(CH1_CH4_PWM_GPIO_CLK| CH5_CH8_PWM_GPIO_CLK |\
RCC_APB2Periph_AFIO , ENABLE);
RCC_APB1PeriphClockCmd(CH1_CH4_PWM_CLK| CH5_CH8_PWM_CLK, ENABLE);
/*引脚重映*/
GPIO_PinRemapConfig(GPIO_FullRemap_TIM3, ENABLE);
/*配置vLight_PWMGpio*/
GPIO_InitStructure.GPIO_Pin = CH1_PWM_PIN |CH2_PWM_PIN |CH3_PWM_PIN |CH4_PWM_PIN ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(CH1_PWM_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = CH5_PWM_PIN |CH6_PWM_PIN |CH7_PWM_PIN |CH8_PWM_PIN ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(CH5_PWM_GPIO_PORT, &GPIO_InitStructure);
}
/*******************************************************************************
** 名称: vLight_PWMModeInit
** 描述: PWM输出模式配置;
** 设置PWM工作频率,计数模式,占空比
**
** 输入: 无
** 输出: 无
********************************************************************************/
void vLight_PWMModeInit(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
//TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
//定时器工作在单脉冲下
TIM_DeInit(CH1_CH4_PWM);
TIM_TimeBaseStructure.TIM_Period = PWM_Freq; //计数值，即定时周期
TIM_TimeBaseStructure.TIM_Prescaler = 0; //预分频，不分频为72MHz
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //时钟分频系数
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数模式
TIM_TimeBaseInit(CH1_CH4_PWM,&TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //在向上计数
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
/*配置通道1*/
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OC4Init(CH1_CH4_PWM,&TIM_OCInitStructure);
TIM_OC4PreloadConfig(CH1_CH4_PWM,TIM_OCPreload_Enable);
/*配置通道2*/
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OC3Init(CH1_CH4_PWM,&TIM_OCInitStructure);
TIM_OC3PreloadConfig(CH1_CH4_PWM,TIM_OCPreload_Enable);
/*配置通道3*/
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OC2Init(CH1_CH4_PWM,&TIM_OCInitStructure);
TIM_OC2PreloadConfig(CH1_CH4_PWM,TIM_OCPreload_Enable);
/*配置通道4*/
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OC1Init(CH1_CH4_PWM,&TIM_OCInitStructure);
TIM_OC1PreloadConfig(CH1_CH4_PWM,TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(CH1_CH4_PWM,ENABLE);
TIM_Cmd(CH1_CH4_PWM,ENABLE);//先不使能能TIM
//定时器工作在单脉冲下
TIM_DeInit(CH5_CH8_PWM);
TIM_TimeBaseStructure.TIM_Period = PWM_Freq; //计数值，即定时周期
TIM_TimeBaseStructure.TIM_Prescaler = 0; //预分频，不分频为72MHz
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //时钟分频系数
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数模式
TIM_TimeBaseInit(CH5_CH8_PWM,&TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //在向上计数
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
/*配置通道5*/
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OC4Init(CH5_CH8_PWM,&TIM_OCInitStructure);
TIM_OC4PreloadConfig(CH5_CH8_PWM,TIM_OCPreload_Enable);
/*配置通道6*/
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OC3Init(CH5_CH8_PWM,&TIM_OCInitStructure);
TIM_OC3PreloadConfig(CH5_CH8_PWM,TIM_OCPreload_Enable);
/*配置通道7*/
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OC2Init(CH5_CH8_PWM,&TIM_OCInitStructure);
TIM_OC2PreloadConfig(CH5_CH8_PWM,TIM_OCPreload_Enable);
/*配置通道8*/
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OC1Init(CH5_CH8_PWM,&TIM_OCInitStructure);
TIM_OC2PreloadConfig(CH5_CH8_PWM,TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(CH5_CH8_PWM,ENABLE);
TIM_Cmd(CH5_CH8_PWM,ENABLE);//先不使能能TIM
}
/*******************************************************************************
** 名称: vLight_PWMModeInit
** 描述: PWM输出模式配置;
** 设置PWM工作频率,计数模式,占空比
**
** 输入: 无
** 输出: 无
********************************************************************************/
void vLight_SetPWM(uint8_t uCH,uint16_t uCycle)
{
switch(uCH)
{
case _CH1:
{
TIM_SetCompare4(CH1_CH4_PWM,uCycle);
break;
}
case _CH2:
{
TIM_SetCompare3(CH1_CH4_PWM,uCycle);
break;
}
case _CH3:
{
TIM_SetCompare2(CH1_CH4_PWM,uCycle);
break;
}
case _CH4:
{
TIM_SetCompare1(CH1_CH4_PWM,uCycle);
break;
}
case _CH5:
{
TIM_SetCompare4(CH5_CH8_PWM,uCycle);
break;
}
case _CH6:
{
TIM_SetCompare3(CH5_CH8_PWM,uCycle);
break;
}
case _CH7:
{
TIM_SetCompare2(CH5_CH8_PWM,uCycle);
break;
}
case _CH8:
{
TIM_SetCompare1(CH5_CH8_PWM,uCycle);
break;
}
default: break;
}
}
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