求教stm32f103ze开发板usart与串口wifi模块通信问题
首先我利用串口调试工具将开发板子和wifi模块分别和电脑相连，并且用串口调试工具，能够实现开饭板子和wifi模块的数据传送。但是，我用开发板子，和wifi模块用串口线相连，arm板子是接收不到数据的。
我检查了下，能保证串口线连接正确，wifi模块能够和发送端无线相连上（因为之前都是和电脑串口相连测试过的）
我就找不到问题所在，求大侠解决， 这个问题很急，希望能帮忙解决，先谢谢了。
附上原main（）原代码：
/****************************************Copyright (c)****************************************************
**
** http://www.powermcu.com
**
**--------------File Info---------------------------------------------------------------------------------
** File name: main.c
** Descriptions: The USART application function
**
**--------------------------------------------------------------------------------------------------------
** Created by: AVRman
** Created date: 2010-10-30
** Version: v1.0
** Descriptions: The original version
**
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date:
** Version:
** Descriptions:
**
*********************************************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include
#ifdef __GNUC__
/* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
set to 'Yes') calls __io_putchar() */
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */
/* Private function prototypes -----------------------------------------------*/
void USART_Configuration(void);
/*******************************************************************************
* Function Name : main
* Description : Main program
* Input : None
* Output : None
* Return : None
* Attention : None
*******************************************************************************/
int main(void)
{
USART_Configuration();
printf("*****************************************************************\r\n");
printf("* *\r\n");
printf("* Thank you for using HY-RedBull V3.0 Development Board ! ^_^ *\r\n");
printf("* *\r\n");
printf("*****************************************************************\r\n");
printf("\r\nPlease input any word :\r\n");
/* Infinite loop */
while (1){
/* Loop until RXNE = 1 */
while (USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
USART_SendData(USART1,USART_ReceiveData(USART1));
}
}
/*******************************************************************************
* Function Name : USART_Configuration
* Description : Configure USART1
* Input : None
* Output : None
* Return : None
* Attention : None
*******************************************************************************/
void USART_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA | RCC_APB2Periph_USART1,ENABLE);
/*
* USART1_TX -> PA9 , USART1_RX -> PA10
*/
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;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_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_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_ITConfig(USART1, USART_IT_TXE, ENABLE);
USART_ClearFlag(USART1,USART_FLAG_TC);
USART_Cmd(USART1, ENABLE);
}
/**
* @brief Retargets the C library printf function to the USART.
* @param None
* @retval None
*/
PUTCHAR_PROTOTYPE
{
/* Place your implementation of fputc here */
/* e.g. write a character to the USART */
USART_SendData(USART1, (uint8_t) ch);
/* Loop until the end of transmission */
while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)
{}
return ch;
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/*********************************************************************************************************
END FILE
*********************************************************************************************************/
RE:求教stm32f103ze开发板usart与串口wifi模块通信问题
注意一下，RX和TX需要交叉。回复:求教stm32f103ze开发板usart与串口wifi模块通信问题
回复第 2 楼 于2012-03-08 01:44:32发表:注意一下，RX和TX需要交叉。
交叉？具体是什么意思，不是很明白
回复:求教stm32f103ze开发板usart与串口wifi模块通信问题
就是RX--接TX，TX接RX，一个接，一个发
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