帮忙看看这个串口程序怎么不对

只看该作者 · 2015-4-24 20:50

#include "stm32f10x.h"
void USART1_Init(void)
{
USART_InitTypeDef USART_InitStructure;
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_Mode=USART_Mode_Tx|USART_Mode_Rx;
USART_InitStructure.USART_HardwareFlowControl=USART_HardwareFlowControl_None;
USART_Init(USART1,&USART_InitStructure);
USART_Cmd(USART1,ENABLE);
}
void USART1_GPIO_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,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_InitStructure.GPIO_Pin=GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA,&GPIO_InitStructure);
}
void Delay(vu32 nCount)
{
for(;nCount!=0;nCount--);
}
int main(void)
{
USART1_Init();
USART1_GPIO_Config();
while(1)
{
USART_SendData(USART1，‘a’);
while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET);
Delay(0xfff);
}
}

只看该作者 · 2015-4-24 20:51

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只看该作者 · 2015-4-24 20:51

串口时钟没开

只看该作者 · 2015-4-24 20:52

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只看该作者 · 2015-4-24 20:52

我是MT 发表于 2015-4-24 20:51
串口的rcc没有enbale

有一句RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
这个也一样的吧

只看该作者 · 2015-4-24 20:53

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只看该作者 · 2015-4-24 20:54

看看这个一定可以//======================================================
void USART1_Configuration(void)
{
      GPIO_InitTypeDef GPIO_InitStructure;
      USART_InitTypeDef USART_InitStructure;

      /* Enable USART1 clock */
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE);
      //USART1
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;                //USART1 TX
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
      GPIO_Init(GPIOA, &GPIO_InitStructure);                   //A端口

      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;                //USART1 RX
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //复用开漏输入
      GPIO_Init(GPIOA, &GPIO_InitStructure);                      //A端口

/* USART1 configuration ------------------------------------------------------*/
      /* USART and USART2 configured as follow:
            - BaudRate = 115200 baud
            - Word Length = 8 Bits
            - One Stop Bit
            - No parity
            - Hardware flow control disabled (RTS and CTS signals)
            - Receive and transmit enabled
      */
      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;

      /* Configure USART1 */
      USART_Init(USART1, &USART_InitStructure);
      /* Enable USART1 Receive and Transmit interrupts */
      USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
      USART_ITConfig(USART1, USART_IT_TXE, ENABLE);

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

只看该作者 · 2015-4-24 20:54

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只看该作者 · 2015-4-24 20:55

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帮忙看看这个串口程序怎么不对

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