TIM4会发出杂声

keithwpa · 发表于 2015-8-20 21:02:21

TIM4会发出杂声，是什么问题，程序如下，主程序中如果删掉TIM4的相关语句就不会有声音了
还一个问题是，导入程序后屏幕是整个绿色，怎么改成正常或者关闭状态

int main(void)
{

SystemInit();
delay_init(72); //延时初始化
NVIC_Configuration();
uart_init(9600);
PWM_Init(199,7199); //20ms的脉冲一个脉2us
while(1)
{
/* TIM_SetCompare2(TIM3,5);
delay_ms(300);
TIM_SetCompare2(TIM3,10);
delay_ms(300);
TIM_SetCompare2(TIM3,15);
delay_ms(300);
TIM_SetCompare2(TIM3,20);
delay_ms(300);
TIM_SetCompare2(TIM3,15);
delay_ms(300);
TIM_SetCompare2(TIM3,10);
delay_ms(300); */
TIM_SetCompare2(TIM3,20);
delay_ms(300);
TIM_SetCompare1(TIM3,15);
delay_ms(300);
TIM_SetCompare3(TIM3,22);
delay_ms(300);
TIM_SetCompare4(TIM3,18);
delay_ms(300);

TIM_SetCompare2(TIM2,20);
delay_ms(300);
TIM_SetCompare1(TIM2,15);
delay_ms(300);
TIM_SetCompare3(TIM2,22);
delay_ms(300);
TIM_SetCompare4(TIM2,18);
delay_ms(300);

/* TIM_SetCompare2(TIM4,20);
delay_ms(300);
TIM_SetCompare1(TIM4,15);
delay_ms(300);
TIM_SetCompare3(TIM4,22);
delay_ms(300);
TIM_SetCompare4(TIM4,18);
delay_ms(300); */
}

}

void PWM_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE); //使能GPIO外设和AFIO复用功能模块时钟使能
//用于TIM3的CH2输出的PWM通过该LED显示

//设置该引脚为复用输出功能,输出TIM3 CH2的PWM脉冲波形
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_6| GPIO_Pin_0| GPIO_Pin_1| GPIO_Pin_2| GPIO_Pin_3; //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(GPIOA, &GPIO_InitStructure);
//GPIO_WriteBit(GPIOA, GPIO_Pin_7,Bit_SET); // PA7上拉

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1| GPIO_Pin_6| GPIO_Pin_7| GPIO_Pin_8| GPIO_Pin_9; //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);

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 80K
TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值不分频
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_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);

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_Pulse = 0; //设置待装入捕获比较寄存器的脉冲值
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //输出极性:TIM输出比较极性高

TIM_OC1Init(TIM3, &TIM_OCInitStructure); //根据TIM_OCInitStruct中指定的参数初始化外设TIMx
TIM_OC2Init(TIM3, &TIM_OCInitStructure);
TIM_OC4Init(TIM3, &TIM_OCInitStructure); //根据TIM_OCInitStruct中指定的参数初始化外设TIMx
TIM_OC3Init(TIM3, &TIM_OCInitStructure);

TIM_OC1Init(TIM2, &TIM_OCInitStructure); //根据TIM_OCInitStruct中指定的参数初始化外设TIMx
TIM_OC2Init(TIM2, &TIM_OCInitStructure);
TIM_OC4Init(TIM2, &TIM_OCInitStructure); //根据TIM_OCInitStruct中指定的参数初始化外设TIMx
TIM_OC3Init(TIM2, &TIM_OCInitStructure);

TIM_OC1Init(TIM4, &TIM_OCInitStructure); //根据TIM_OCInitStruct中指定的参数初始化外设TIMx
TIM_OC2Init(TIM4, &TIM_OCInitStructure);
TIM_OC4Init(TIM4, &TIM_OCInitStructure); //根据TIM_OCInitStruct中指定的参数初始化外设TIMx
TIM_OC3Init(TIM4, &TIM_OCInitStructure);

//TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable); //使能TIMx在CCR2上的预装载寄存器

//TIM_ARRPreloadConfig(TIM3, ENABLE); //使能TIMx在ARR上的预装载寄存器

TIM_Cmd(TIM2, ENABLE);
TIM_Cmd(TIM3, ENABLE); //使能TIMx外设
TIM_Cmd(TIM4, ENABLE);
}
void Timerx_Init(u16 arr,u16 psc)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 |RCC_APB1Periph_TIM3 |RCC_APB1Periph_TIM4, ENABLE);

TIM_TimeBaseStructure.TIM_Period = 5000; //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计数到5000为500ms
TIM_TimeBaseStructure.TIM_Prescaler =(7200-1); //设置用来作为TIMx时钟频率除数的预分频值 10Khz的计数频率
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_TimeBaseInit(TIM3 , &TIM_TimeBaseStructure);
TIM_TimeBaseInit(TIM4 , &TIM_TimeBaseStructure);

TIM_ITConfig( TIM2 , TIM_IT_Update | TIM_IT_Trigger, ENABLE );
TIM_ITConfig( TIM3 , TIM_IT_Update | TIM_IT_Trigger, ENABLE );
TIM_ITConfig( TIM4 , TIM_IT_Update | TIM_IT_Trigger, ENABLE );

NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; //TIM3中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //先占优先级0级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //从优先级3级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器

NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn; //TIM3中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //先占优先级0级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; //从优先级3级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器

NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn; //TIM3中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //先占优先级0级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; //从优先级3级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
NVIC_Init(&NVIC_InitStructure); //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器

TIM_Cmd( TIM2 , ENABLE); //使能TIMx外设
TIM_Cmd( TIM3 , ENABLE);
TIM_Cmd( TIM4 , ENABLE);
}

void TIM3_IRQHandler(void) //TIM3中断
{
if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) //检查指定的TIM中断发生与否:TIM 中断源
{
TIM_ClearITPendingBit(TIM3, TIM_IT_Update ); //清除TIMx的中断待处理位:TIM 中断源

//GPIO_WriteBit(GPIOD, GPIO_Pin_2, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOD, GPIO_Pin_2)));
}
}

void TIM2_IRQHandler(void) //TIM3中断
{
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) //检查指定的TIM中断发生与否:TIM 中断源
{
TIM_ClearITPendingBit(TIM2, TIM_IT_Update ); //清除TIMx的中断待处理位:TIM 中断源

//GPIO_WriteBit(GPIOD, GPIO_Pin_2, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOD, GPIO_Pin_2)));
}
}

void TIM4_IRQHandler(void) //TIM3中断
{
if (TIM_GetITStatus(TIM4, TIM_IT_Update) != RESET) //检查指定的TIM中断发生与否:TIM 中断源
{
TIM_ClearITPendingBit(TIM4, TIM_IT_Update ); //清除TIMx的中断待处理位:TIM 中断源

//GPIO_WriteBit(GPIOD, GPIO_Pin_2, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOD, GPIO_Pin_2)));
}
}