STM32F103C8T6 串口1 TX PA9没反映

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博斯|

楼主 | 2020-4-25 19:58 | 只看该作者回帖奖励

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stm32f103c8t6, 串口, USART, SAR, pi

void Usart_InitConfig()
{
      GPIO_InitTypeDef GPIO_Initstruct;
      USART_InitTypeDef USART_InitStructure;


RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO,ENABLE);
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);


         //GPIOA  txd
         GPIO_Initstruct.GPIO_Mode = GPIO_Mode_AF_PP;
         GPIO_Initstruct.GPIO_Pin = GPIO_Pin_9;
         GPIO_Initstruct.GPIO_Speed = GPIO_Speed_50MHz;
         GPIO_Init(GPIOA,&GPIO_Initstruct);

      //GPIOA rxd
         GPIO_Initstruct.GPIO_Mode = GPIO_Mode_IN_FLOATING;
                     GPIO_Initstruct.GPIO_Pin = GPIO_Pin_10;
                     GPIO_Initstruct.GPIO_Speed = GPIO_Speed_50MHz;
                     GPIO_Init(GPIOA,&GPIO_Initstruct);

      //USART
                     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);
                     USART_ClearFlag(USART1, USART_FLAG_TC);
}

//发送数据
void Usart_SendByte(USART_TypeDef* pUSARTx,uint16_t ch)
{

USART_SendData(pUSARTx,ch);
      while(USART_GetFlagStatus(pUSARTx,USART_FLAG_TXE)==SET);
}
//发送指定位数据
void Usart_SendStr_length( USART_TypeDef * pUSARTx, uint8_t *str,uint32_t strlen )
{
      unsigned int k=0;
do
{
      Usart_SendByte( pUSARTx, *(str + k) );
      k++;
} while(k < strlen);
}
//发送字符串
void Usart_SendString( USART_TypeDef * pUSARTx, uint8_t *str)
{
      unsigned int k=0;
do
{
      Usart_SendByte( pUSARTx, *(str + k) );
      k++;
} while(*(str + k)!='\0');
}

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STM32F103C8T6 串口1 TX PA9没反映

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