求助,stm32串口问题。大侠帮忙！

只看该作者 · 2013-2-6 13:52

使用串口1,查询收发。能发不能收。哪位帮我看看代码有什么问题，谢谢！！
void uart_init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_USART1, ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 ;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// GPIO_SetBits(GPIO_ADDR_PORT, ICCS1 );// SET ONE

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);

  USART_InitStructure.USART_BaudRate = 9600;
  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_ClockInitStructure.USART_Clock = USART_Clock_Disable;
  USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
//  USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
  USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;

  USART_Init(USART1, &USART_InitStructure);
  USART_ClockInit(USART1, &USART_ClockInitStructure);

  /* Enable the USART1 */
  USART_Cmd(USART1, ENABLE);
}

void uart_sendbyte(unsigned char len, unsigned char *s_buf)
{
unsigned char i;
for(i=0; i<len; i++)
{
USART_SendData(USART1, s_buf[i]);
while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
}
}

void uart_receivebyte(unsigned char len, unsigned char *r_buf)
{
unsigned char i,temp;
temp=0;
for(i=0; i<len; i++)
{
while(temp=USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
   r_buf[i] = USART_ReceiveData(USART1);
   // USART_SendData(USART2, RxBuffer[RxCounter++]);
}
}