STM32F107串口1和串口2通信

merlong

STM32F107串口1和串口2通信 [复制链接]

STM32F107串口1和串口2通信 串口2发送数据，串口1接收数据，为什么串口1接收到的数据只有第一个字节？？？

#include "stm32f10x.h"

#include "stm32_eval.h"

#include <stdio.h>

/* Private typedef -----------------------------------------------------------*/

/* Private define ------------------------------------------------------------*/

/* Constants used by Serial Command Line Mode */

#define CMD_STRING_SIZE       128

USART_InitTypeDef USART_InitStructure;

void GetInputString (uint8_t * buffP);

uint8_t GetKey(void);

uint32_t SerialKeyPressed(uint8_t *key);

void SerialPutChar(uint8_t c); 

void USART_Configuration(void);

void Put_String(u8 *p);

int main(void)

{

  uint8_t inputstr[CMD_STRING_SIZE]; 

 

u8 str[]={"1234abcd1234"};

USART_Configuration();

 // Put_String(inputstr); 

  while (1)

  {  Put_String(str); 

     GetInputString(inputstr);

  }

}

void USART_Configuration(void)

{   USART_InitStructure.USART_BaudRate = 115200;  //串口2

  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_Tx;

  /* 完成串口时钟配置、GPIO配置、根据上述参数初始化并使能串口 */

  STM_EVAL_COMInit(COM1, &USART_InitStructure);  //串口1

  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;

  STM_EVAL_COMInit(COM2, &USART_InitStructure);

}

void GetInputString (uint8_t * buffP)

{

  u32 bytes_read = 0;

  u8 c = 0;

  

  do

  {

    c = GetKey();

    if (bytes_read >= (CMD_STRING_SIZE))

    {

      bytes_read = 0;

     // continue;

break;

    }

    if (c >= 0x20 && c <= 0x7E)

    {

      buffP[bytes_read++] = c;   

    }

  }

  while (c!='\0');

  buffP[bytes_read] = '\0';

} 

/**************************************************/ 

void Put_String(u8 *p) //USART2发送字符串

{ 

while(*p) 

{ 

    USART_SendData(USART2, *p++); 

    while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET) 

    {

} 

} 

}

u32 SerialKeyPressed(u8 *key)  //USART1接收数据

{

  if ( USART_GetFlagStatus(EVAL_COM2, USART_FLAG_RXNE) != RESET)

  {

    *key = (u8)EVAL_COM2->DR & 0xFF;

    return 1;

  }

  else

  {

    return 0;

  }

}

/**

  * @brief  Wait untill Get a key from the HyperTerminal

  * @param  None

  * @retval The Key Pressed

  */

u8 GetKey(void)   //接收数据

{

  u8 key = 0;

  /* Waiting for user input */

  while (1)

  {

    if (SerialKeyPressed((u8*)&key)) break;

  }

  return key;

}

#ifdef  USE_FULL_ASSERT

void assert_failed(u8* file, u32 line)

{ 

  while (1)

  {

  }

}

#endif

ienglgge

我的串口都发不了。。。