按照论坛以前人写的红外输出程序改的,但是为什么不能工作?

youngytj · 发表于 2014-2-6 14:26:28

        /*PC6作为红外发射引脚,设置生成38Khz的PWM*/
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO,ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM8, ENABLE);

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_6;

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;

GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;

GPIO_Init(GPIOC, &GPIO_InitStructure);

TIM_TimeBaseStructure.TIM_Period = 1894; //不分频。PWM频率=72000/1894=38Khz

TIM_TimeBaseStructure.TIM_Prescaler = 0;

TIM_TimeBaseStructure.TIM_ClockDivision = 0;

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;

TIM_TimeBaseInit(TIM8, &TIM_TimeBaseStructure);

TIM_ARRPreloadConfig(TIM8, ENABLE);

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;

TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;

TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

TIM_OC1Init(TIM8, &TIM_OCInitStructure);

TIM_OC1PreloadConfig(TIM8, TIM_OCPreload_Enable);

TIM_Cmd(TIM8, ENABLE);

TIM_CtrlPWMOutputs(TIM8, ENABLE);

/*发射程序*/

void IRRmote_Send(u8 addressCode,u8 dataCode)

{

//9ms

TIM_Cmd(TIM8, ENABLE);

delay_ms(9);

//4.5ms

TIM_Cmd(TIM8, DISABLE);

delay_ms(4);

delay_us(500);

IRRmote_Send_Byte(addressCode); //用户码

IRRmote_Send_Byte(~addressCode); //用户反码

IRRmote_Send_Byte(dataCode); //数据码

IRRmote_Send_Byte(~dataCode); //数据反码

//下面增加是为了避免在发送最后一位时出现错码

TIM_Cmd(TIM8, ENABLE);

delay_us(565);

TIM_Cmd(TIM8, DISABLE);

delay_us(565);

}

void IRRmote_Send_Byte(u8 getdata)

{

u8 senddata,i;

senddata=getdata;

for(i=0;i<8;i++)

{

if(senddata&0x01)

{

//1

TIM_Cmd(TIM8, ENABLE);

delay_us(565);

TIM_Cmd(TIM8, DISABLE);

delay_us(565);

delay_us(565);

delay_us(565);

}

else

{

//0

TIM_Cmd(TIM8, ENABLE);

delay_us(565);

TIM_Cmd(TIM8, DISABLE);

delay_us(565);

}

senddata=senddata>>1;

}

}