要求USART1和USART2能实现通信。通过XCOM调试助手从USART1发送数据到USART2接收，从USART2发送数据到USART1接收。但是我写的程序怎么都实现不了，没有收发

铁匠之锤 · 发表于 2015-7-31 14:57:03

最近在写一个程序，要求USART1和USART2能实现通信。通过XCOM调试助手从USART1发送数据到USART2接收，从USART2发送数据到USART1接收。但是我写的程序怎么都实现不了，没有收发，但是如果标注一个串口的话，剩下的串口既能收有能发，求原子哥帮助。
usart.h
#ifndef __USART_H
#define __USART_H
#include "stdio.h"
#include "sys.h"

#define USART_REC_LEN 200
#define USART2_REC_LEN 200
#define EN_USART_RX 1
#define EN_USART2_RX 1

extern u8 USART_RX_BUF[USART_REC_LEN];
extern u16 USART_RX_STA;
extern u8 USART_RX_BUF[USART2_REC_LEN];
extern u16 USART2_RX_STA;

void uart_init(void);
void uart2_init(void);

#endif

usart.c
#include "sys.h"
#include "usart.h"

#if SYSTEM_SUPPORT_OS
#include "includes.h"
#endif

#if 1
#pragma import(__use_no_semihosting)

struct __FILE
{
int handle;

};

FILE __stdout;

_sys_exit(int x)
{
x = x;
}

int fputc(int ch, FILE *f)
{
while((USART1->SR&0X40)==0);//???··???,?±??·????ê±?
USART1->DR = (u8) ch;
return ch;
}
#endif

#if EN_USART_RX
u8 USART_RX_BUF[USART_REC_LEN];
u16 USART_RX_STA=0;

void uart_init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE);

//USART1_TX GPIOA.9
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);

//USART1_RX GPIOA.10
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;//PA.10
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);//??????GPIOA.10

//Usart1 NVIC
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

//USART1

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_Init(USART1, &USART_InitStructure);

USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
//USART_ITConfig(USART1, USART_IT_TXE, ENABLE);
USART_Cmd(USART1, ENABLE);
}

void USART1_IRQHandler(void)
{
u8 Res;
#if SYSTEM_SUPPORT_OS
OSIntEnter();
#endif
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
{
Res =USART_ReceiveData(USART1);

if((USART_RX_STA&0x8000)==0)
{
if(USART_RX_STA&0x4000)
{
if(Res!=0x0a)USART_RX_STA=0;
else USART_RX_STA|=0x8000;
}
else
{
if(Res==0x0d)USART_RX_STA|=0x4000;
else
{
USART_RX_BUF[USART_RX_STA&0X3FFF]=Res ;
USART_RX_STA++;
if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;
}
}
}
}
#if SYSTEM_SUPPORT_OS
OSIntExit();
#endif
}
#endif

#if EN_USART2_RX

u8 USART_RX_BUF[USART2_REC_LEN];

u16 USART2_RX_STA=0;

void uart2_init()
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);

//USART1_TX GPIOA.9
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);

//USART1_RX GPIOA.10
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);

//USART2 NVIC
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

//USART2

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_Init(USART2, &USART_InitStructure);
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);
USART_ITConfig(USART2, USART_IT_TXE,ENABLE);
USART_Cmd(USART2, ENABLE);
}

void USART2_IRQHandler(void)
{
u8 Res;
#if SYSTEM_SUPPORT_OS .
OSIntEnter();
#endif
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
{
Res =USART_ReceiveData(USART1);
if((USART2_RX_STA&0x8000)==0)
{
if(USART2_RX_STA&0x4000)
{
if(Res!=0x0a)USART2_RX_STA=0;
else USART2_RX_STA|=0x8000;
}
else
{
if(Res==0x0d)USART2_RX_STA|=0x4000;
else
{
USART_RX_BUF[USART2_RX_STA&0X3FFF]=Res ;
USART2_RX_STA++;
if(USART2_RX_STA>(USART2_REC_LEN-1))USART2_RX_STA=0;
}
}
}
}
#if SYSTEM_SUPPORT_OS
OSIntExit();
#endif
}

#endif

main.c
#include "led.h"
#include "delay.h"
#include "key.h"
#include "sys.h"
#include "usart.h"

int main(void)
{
u16 t;
u16 len;
u16 times=0;
delay_init();
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

uart_init();
uart2_init();
while(1)
{

if(USART_RX_STA&0x8000)
{
len=USART_RX_STA&0x3fff;

for(t=0;t<len;t++)
{
USART_SendData(USART2, USART_RX_BUF[t]);

while(USART_GetFlagStatus(USART2,USART_FLAG_TC)!=SET);
}
USART_RX_STA=0;
}else
{
times++;
delay_ms(10);
}
}
}

铁匠之锤 · 发表于 2015-7-31 14:57:04

说实话，我还是个菜鸟，最开始发贴的时候是几个月前，那会儿啥都不懂，就是一片白纸。这几个月跟着公司的师傅做了几个项目，慢慢的开始懂一些了。贴上我写的通信程序吧，还是要求USART1发送从USART2收到的数，USART2发送从USART1收到的数，经过试验还是能用的
我用的单片机是STM32F103ZET6版本是YL-29