stm32f103c8t6串口1和pwm有影响

wangdong

USART1_Config();  //串口1 配置函数
TIM1_Mode_Config();  //pwm初始化

这样初始化完以后串口1 就发不出去数据，但是能接收

void USART1_Config(void)
{
        GPIO_InitTypeDef GPIO_InitStructure;
        USART_InitTypeDef USART_InitStructure;

       
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);

        /* USART1 ê1óÃIO¶Ë¿úÅäÖà */   
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);   

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;        //¸¡¿Õêäèë
  GPIO_Init(GPIOA, &GPIO_InitStructure);   //3õê¼»ˉGPIOA
          
       
        USART_InitStructure.USART_BaudRate = 115200;        //
        USART_InitStructure.USART_WordLength = USART_WordLength_8b;        //
        USART_InitStructure.USART_StopBits = USART_StopBits_1;         //
        USART_InitStructure.USART_Parity = USART_Parity_No ;  //
        USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;        //
        USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//
        USART_Init(USART1, &USART_InitStructure);  //
        USART_Cmd(USART1, ENABLE);//
       
}


pwm初始化
/*ÅäÖÃTIM1êä3öμ&#196WMDÅoÅμÄÄ￡ê½￡¬èçÖüÆú¡￠¼«DÔ¡￠Õ¼¿Õ±è */
static void TIM1_Mode_Config(void)
{
        TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
        TIM_OCInitTypeDef  TIM_OCInitStructure;

        /* PWMDÅoÅμçƽìø±äÖμ */
        //u16 CCR1_Val = 50000;        
        u16 CCR2_Val = 50000;
        u16 CCR3_Val = 50000;
        //u16 CCR4_Val = 125;

/* -----------------------------------------------------------------------
    TIM1 Configuration: generate 2 PWM signals with 2 different duty cycles:
    TIM1CLK = 72 MHz, Prescaler = 0x0, TIM1 counter clock = 36 MHz
    TIM3 ARR Register = 50000 => TIM1 Frequency = TIM1 counter clock/(ARR + 1)
    TIM3 Frequency = 1440Hz.
    TIM1 Channel1 duty cycle = (TIM1_CCR1/ TIM1_ARR)* 100
    TIM1 Channel2 duty cycle = (TIM1_CCR2/ TIM1_ARR)* 100

  ----------------------------------------------------------------------- */

/* Time base configuration */
  TIM_TimeBaseStructure.TIM_Period = 1024;
  TIM_TimeBaseStructure.TIM_Prescaler = 0;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

  TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

  /* PWM1 Mode configuration: Channel1 */
  /*TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR1_Val;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
  TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low;//¿a·′Ïòí¨μà
  TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
  TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;

  TIM_OC1Init(TIM1, &TIM_OCInitStructure);

  TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);*/

  /* PWM1 Mode configuration: Channel2 */

  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR2_Val;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
  TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low;//¿a·′Ïòí¨μà
  TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
  TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;          

  TIM_OC2Init(TIM1, &TIM_OCInitStructure);

  TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);       


  /* PWM1 Mode configuration: Channel3 */

  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
  TIM_OCInitStructure.TIM_Pulse = CCR3_Val;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
  TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low;//¿a·′Ïòí¨μà
  TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
  TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;          

  TIM_OC3Init(TIM1, &TIM_OCInitStructure);

  TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);       



  TIM_ARRPreloadConfig(TIM1, ENABLE);

  /* TIM1 enable counter */
  TIM_Cmd(TIM1, ENABLE);
  TIM_CtrlPWMOutputs(TIM1, ENABLE);       
}

希望有遇到此问题的朋友予以帮助

这个占用了没

楼主解决了吗

孟亮

TIM1的CH2  CH3 和 USART PA9 PA10是同一个，重映射一个就行了