STM32 USART1 USART2 UASRT3 UART4 UART5串口通信测试程序

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STM32 USART1 USART2 UASRT3 UART4 UART5串口通信测试程序

(2014-02-11 20:09:19)

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分类：单片机、嵌入系统

// 5个串口均可工作,已经把定时器中断、串口中断和配置函数写在一个文件中晶振 8Mhz

#include "stm32f10x_lib.h"

#include"stdio.h"

#define uchar unsigned char

#define uint unsigned int

#define ulong unsigned long

uint TimingDelay;

#define YES 1

#define NO 0

#define COM1_TX_EN GPIO_ResetBits(GPIOC,GPIO_Pin_1) // GPIOC->BSRR=0xfd //&=0xfd //USART1 发送使能

#define COM1_RX_EN GPIO_SetBits(GPIOC,GPIO_Pin_1) // GPIOC->BSRR=0x02 //|=0x02 //USART1 禁止发送

#define COM2_TX_EN GPIO_ResetBits(GPIOC,GPIO_Pin_2) // GPIOC->BSRR=0xfd //&=0xfd //USART2 发送使能

#define COM2_RX_EN GPIO_SetBits(GPIOC,GPIO_Pin_2)

#define COM3_TX_EN GPIO_ResetBits(GPIOC,GPIO_Pin_3) // GPIOC->BSRR=0xfd //&=0xfd //USART3 发送使能

#define COM3_RX_EN GPIO_SetBits(GPIOC,GPIO_Pin_3) // GPIOC->BSRR=0x02 //|=0x02 //USART3 禁止发送

#define COM4_TX_EN GPIO_ResetBits(GPIOC,GPIO_Pin_4) // GPIOC->BSRR=0xfd //&=0xfd //UART4 发送使能

#define COM4_RX_EN GPIO_SetBits(GPIOC,GPIO_Pin_4) // GPIOC->BSRR=0x02 //|=0x02 //UART4 禁止发送

//UART5 上行串口接收中断数据定义

uchar ComSynFlag; //=YES同步建立，UART0内部私有

uchar ComReceiveCounter; //接收字节计数，UART0内部私有

uchar ComReceiveData[24]; //接收缓冲，UART0内部私有

GPIO_InitTypeDef GPIO_InitStructure;

ErrorStatus HSEStartUpStatus;

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

TIM_OCInitTypeDef TIM_OCInitStructure;

u16 Status; //定时器累加

void RCC_Configuration(void);

void GPIO_Configuration(void);

void NVIC_Configuration(void);

void TIM2_Configuration(void);

void UART5_Configuration(void);

void SysTick_Configuration(void) ;

void Com3TxChar(vu8);

vu16 CCR1_Val = 0x0E10; //360 50Hz 20ms

vu16 CCR2_Val = 0x0048; //7200 10hz 100ms

vu16 CCR3_Val = 0x7530; //30000 10Hz

vu16 CCR4_Val = 0x1000;

u16 capture1 = 0;

u16 capture2 = 0;

u16 capture3 = 0;

u16 capture4 = 0;

int cnt1,cnt2,nt2=50;

//UART1 下行串口接收中断数据定义

#define C1_LEN 300 //缓冲区长度

uint Com1RecCnt; //COM1接收字节计数

uchar Com1RecDat[C1_LEN]; //COM1接收缓冲

uchar Com1AnsDat[24];

uint Com1AnsCnt;

uint Com2RecCnt; //COM2接收字节计数

uchar Com2RecDat[C1_LEN]; //COM2接收缓冲

uchar Com2AnsDat[24];

uint Com2AnsCnt;

uint Com3RecCnt; //COM3接收字节计数

uchar Com3RecDat[C1_LEN]; //COM3接收缓冲

uchar Com3AnsDat[24];

uint Com3AnsCnt;

uint Com4RecCnt; //COM4接收字节计数

uchar Com4RecDat[C1_LEN]; //COM4接收缓冲

uchar Com4AnsDat[24];

uint Com4AnsCnt;

uint Time20msCnt; //20ms定时器

uint T20msCnt; //20ms定时器

uint T1sCnt; //1s定时器

uchar RunCnt; //RUN LED闪光频率参数

//=======================================================================

void RCC_Configuration()

{

ErrorStatus HSEStartUpStatus; //定义外部高速晶振启动状态枚举变量

RCC_DeInit(); //复位RCC外部寄存器到默认值

RCC_HSEConfig(RCC_HSE_ON); //打开外部高速晶振

HSEStartUpStatus=RCC_WaitForHSEStartUp(); //等待外部高速时钟准备好

if(HSEStartUpStatus==SUCCESS)

{ //外部高速时钟已经准备好

FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); //开启FLASH预读缓冲功能，加速FLASH的读取。所有程序中必须的用法，位置：RCC初始化子函数里面，时钟起振之后

FLASH_SetLatency(FLASH_Latency_2); //FLASH时序延迟几个周期，等待总线同步操作。推荐按照单片机系统运行频率，0—24MHz时，取Latency=0；24—48MHz时，取Latency=1；48~72MHz时，取Latency=2。

RCC_HCLKConfig(RCC_SYSCLK_Div1); //配置AHB(HCLK)==系统时钟/1

RCC_PCLK2Config(RCC_HCLK_Div1); //配置APB2(高速)(PCLK2)==系统时钟/1

RCC_PCLK1Config(RCC_HCLK_Div2); //配置APB1(低速)(PCLK1)==系统时钟/2

//注：AHB主要负责外部存储器时钟。APB2负责AD，I/O，高级TIM，串口1。APB1负责DA，USB，SPI，I2C，CAN，串口2345，普通TIM。

RCC_PLLConfig(RCC_PLLSource_HSE_Div1,RCC_PLLMul_9); //配置PLL时钟==(外部高速晶体时钟/1）* 9 ==72MHz

RCC_PLLCmd(ENABLE); //使能PLL时钟

while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY)==RESET); //等待PLL时钟就绪

RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); //配置系统时钟==PLL时钟

while(RCC_GetSYSCLKSource()!=0x08); //等待系统时钟源的启动

}

//==============以下为开启外设时钟的操作============================//

// RCC_AHBPeriphClockCmd (ABP2设备1 | ABP2设备2 , ENABLE); //启动AHB设备

// RCC_APB2PeriphClockCmd(ABP2设备1 | ABP2设备2 , ENABLE); //启动ABP2设备

// RCC_APB1PeriphClockCmd(ABP2设备1 | ABP2设备2 , ENABLE); //启动ABP1设备

// RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO | RCC_APB2Periph_USART1 , ENABLE); //打开APB2外设

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOB

|RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD, ENABLE);

RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART5 |RCC_APB1Periph_UART4 |RCC_APB1Periph_USART2 |RCC_APB1Periph_USART3 | RCC_APB1Periph_TIM2,ENABLE);

}

//==============================================================

void SysTick_Configuration(void) //延时函数初始化

{

SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK);

NVIC_SystemHandlerPriorityConfig(SystemHandler_SysTick, 3, 0);

SysTick_SetReload(72000);

SysTick_ITConfig(ENABLE);

}

//=================================

void delay(u32 nTime)

{

SysTick_CounterCmd(SysTick_Counter_Enable);

TimingDelay = nTime;

while(TimingDelay != 0);

SysTick_CounterCmd(SysTick_Counter_Disable);

SysTick_CounterCmd(SysTick_Counter_Clear);

}

//==================================

void TimingDelay_Decrement(void)

{

if (TimingDelay != 0x00)

{

TimingDelay--;

}

void Delay(vu32 nCount)

{

for(; nCount != 0; nCount--);

}

//============================================

void NVIC_Configuration(void )

{

NVIC_InitTypeDef NVIC_InitStructure; //定义一个中断结构体

// NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0); //设置中断向量表的起始地址为0x08000000

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); //设置NVIC优先级分组，方式。

//注：一共16个优先级，分为抢占式和响应式。两种优先级所占的数量由此代码确定，NVIC_PriorityGroup_x可以是0、1、2、3、4，

//分别代表抢占优先级有1、2、4、8、16个和响应优先级有16、8、4、2、1个。规定两种优先级的数量后，所有的中断级别必须在其中选择，

//抢占级别高的会打断其他中断优先执行，而响应级别高的会在其他中断执行完优先执行。

NVIC_InitStructure.NVIC_IRQChannel = UART5_IRQChannel; //通道设置为串口5中断

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //中断响应优先级0

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //打开中断

NVIC_Init(&NVIC_InitStructure); //初始化

//定时器2中断

NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQChannel;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQChannel;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQChannel;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQChannel;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQChannel;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

}

void GPIO_Configuration(void)

{

GPIO_InitTypeDef GPIO_InitStructure; //定义GPIO初始化结构体

//--------将UART5 的TX 配置为复用推挽输出 AF_PP---------------------//

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_12; //管脚位置定义，标号可以是NONE、ALL、0至15。

GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz; //输出速度50MHz

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP; //推挽输出模式 Out_PP

GPIO_Init(GPIOC,&GPIO_InitStructure); //E组GPIO初始化

//--------将USART1,USART2 的TX 配置为复用推挽输出 AF_PP---------------------//

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 |GPIO_Pin_2 | GPIO_Pin_0 | GPIO_Pin_6;

GPIO_Init(GPIOA, &GPIO_InitStructure);

//--------将USART3 的TX 配置为复用推挽输出 AF_PP---------------------//

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;

GPIO_Init(GPIOB, &GPIO_InitStructure);

//--------将UART4 的TX 配置为复用推挽输出 AF_PP---------------------//

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;

GPIO_Init(GPIOC, &GPIO_InitStructure);

//--------将UART5 的RX 配置为复用浮空输入 IN_FLOATING---------------------//

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_2; //管脚位置定义

//输入模式下配置输出速度无意义

//GPIO_InitStructure.GPIO_Speed=GPIO_Speed_2MHz; //输出速度2MHz

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING; //浮空输入 IN_FLOATING

GPIO_Init(GPIOD,&GPIO_InitStructure); //C组GPIO初始化

//--------将USART1 USART2 的RX 配置为复用浮空输入 IN_FLOATING---------------------//

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 |GPIO_Pin_3;

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING; //浮空输入 IN_FLOATING

GPIO_Init(GPIOA, &GPIO_InitStructure);

//--------将USART3 的RX 配置为复用浮空输入 IN_FLOATING---------------------//

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING; //浮空输入 IN_FLOATING

GPIO_Init(GPIOB, &GPIO_InitStructure);

//--------将UART4 的RX 配置为复用浮空输入 IN_FLOATING---------------------//

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING; //浮空输入 IN_FLOATING

GPIO_Init(GPIOC, &GPIO_InitStructure);

}

//==============================================================

void TIM2_Configuration(void)

{

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;//定时器初始化结构

//TIM_ICInitTypeDef TIM_ICInitStructure; //通道输入初始化结构

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

TIM_TimeBaseStructure.TIM_Period = 0xffff;

TIM_TimeBaseStructure.TIM_Prescaler = 499; //时钟分频

TIM_TimeBaseStructure.TIM_ClockDivision = 0x0; //时钟分割

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); //基本初始化

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;

TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

TIM_OCInitStructure.TIM_Pulse = CCR1_Val;

TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;

TIM_OC1Init(TIM2, &TIM_OCInitStructure);

TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Disable);

TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

TIM_OCInitStructure.TIM_Pulse = CCR2_Val;

TIM_OC2Init(TIM2, &TIM_OCInitStructure);

TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Disable);

//TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

//TIM_OCInitStructure.TIM_Pulse = 255;

//TIM_OC4Init(TIM2, &TIM_OCInitStructure);

TIM_Cmd(TIM2, ENABLE);

TIM_ClearFlag(TIM2, TIM_FLAG_Update);

TIM_ClearITPendingBit(TIM2, TIM_FLAG_Update); //清除TIM2等待中断更新中断标志位

TIM_ITConfig(TIM2, TIM_IT_CC1 |TIM_IT_CC2 , ENABLE);

}

//================================================

void Com5TxChar( vu8 i )

{

USART_SendData(UART5,i); //回发给PC

while(USART_GetFlagStatus(UART5, USART_FLAG_TXE)==RESET);

}

//---------------------

void Com5TxStr( vu8 *pt, vu8 length )

{

vu8 i;
for( i=0;i

    {
       Com5TxChar(*pt++);
    }
   // delay(10);

}

//----------------------------

void Com1TxChar( vu8 i )

{

USART_SendData(USART1,(u8) i); //回发给PC

while(USART_GetFlagStatus(USART1, USART_FLAG_TXE)==RESET)

{

}

// return i;

}

void Com1TxStr( vu8 *pt, vu8 length )

{

vu8 i;

for(i=0;i

Com1TxChar(*pt++);

}

// delay(10);

}

void Com2TxChar( vu8 i )

{

USART_SendData(USART2,(u8) i); //回发给PC

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

{

}

// return i;

}

void Com2TxStr( vu8 *pt, vu8 length )

{

vu8 i;

for(i=0;i

Com2TxChar(*pt++);

}

// delay(10);

}

void Com3TxChar( vu8 i )

{

USART_SendData(USART3,(u8) i); //回发给PC

while(USART_GetFlagStatus(USART3, USART_FLAG_TXE)==RESET)

{

}

// return i;

}

void Com3TxStr( vu8 *pt, vu8 length )

{

vu8 i;

for(i=0;i

Com3TxChar(*pt++);

}

// delay(10);

}

void Com4TxChar( vu8 i )

{

USART_SendData(UART4,(u8) i); //回发给PC

while(USART_GetFlagStatus(UART4, USART_FLAG_TXE)==RESET)

{

}

// return i;

}

void Com4TxStr( vu8 *pt, vu8 length )

{

vu8 i;

for(i=0;i

Com4TxChar(*pt++);

}

// delay(10);

}

void TIM2_IRQHandler(void)

{

vu8 i;

if (TIM_GetITStatus(TIM2, TIM_IT_CC1) != RESET)

{

TIM_ClearITPendingBit(TIM2, TIM_IT_CC1);

cnt1++;

cnt2++;

if(cnt1>=500)

{

// polling=1;

cnt1=0;

}

if(cnt2>=nt2) //RUNLED,WDI

{

GPIO_WriteBit(GPIOA, GPIO_Pin_0, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOA, GPIO_Pin_0)));

if(Alert_flag==1)

{

GPIO_WriteBit(GPIOA, GPIO_Pin_6, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOA, GPIO_Pin_6)));

}

cnt2=0;

}

Time20msCnt++; // 秒级硬件延时

if( Time20msCnt>=50 && T1sCnt ){

Time20msCnt=0;

T1sCnt--;

}

if(T20msCnt){ //20ms单位延时

T20msCnt--;

}

capture1 = TIM_GetCapture1(TIM2);

TIM_SetCompare1(TIM2, capture1 + CCR1_Val );

}

if (TIM_GetITStatus(TIM2, TIM_IT_CC2) != RESET)

{

TIM_ClearITPendingBit(TIM2, TIM_IT_CC2);

capture2 = TIM_GetCapture2(TIM2);

TIM_SetCompare2(TIM2, capture2 + CCR2_Val );

}

//********串口COM5配置*****************************

void UART5_Configuration(void)

{

USART_InitTypeDef USART_InitStructure; //串口设置恢复默认参数

USART_InitStructure.USART_BaudRate = 115200; //波特率115200

USART_InitStructure.USART_WordLength = USART_WordLength_8b; //字长8位

USART_InitStructure.USART_StopBits = USART_StopBits_1; //1位停止字节

USART_InitStructure.USART_Parity = USART_Parity_No; //无奇偶校验

USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //无流控制

USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //打开Rx接收和Tx发送功能

//USART_Init(USART1, &USART_InitStructure);

USART_Init(UART5, &USART_InitStructure); //初始化

// USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);

// USART_ITConfig(USART1, USART_IT_TXE, ENABLE);

USART_ITConfig(UART5, USART_IT_RXNE, ENABLE); // 若接收数据寄存器满，则产生中断

//USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);

// USART_ITConfig(UART5, USART_IT_TXE, ENABLE);

USART_Cmd(UART5, ENABLE); //启动串口

//USART_Cmd(USART1, ENABLE);

//-----如下语句解决第1个字节无法正确发送出去的问题-----//

USART_ClearFlag(UART5, USART_FLAG_TC); // 清标志

//USART_ClearFlag(USART1, USART_FLAG_TC);

}

//************串口COM1~COM44配置*********************************
void USART_Configuration(void)

{

USART_InitTypeDef USART_InitStructure; //串口设置恢复默认参数

USART_InitStructure.USART_BaudRate = 1200; //波特率1200

USART_InitStructure.USART_WordLength = USART_WordLength_8b; //字长8位

USART_InitStructure.USART_StopBits = USART_StopBits_1; //1位停止字节

USART_InitStructure.USART_Parity = USART_Parity_No; //无奇偶校验

USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None; //无流控制

USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //打开Rx接收和Tx发送功能

USART_Init(USART1, &USART_InitStructure);

USART_Init(USART2, &USART_InitStructure);

USART_Init(USART3, &USART_InitStructure);

USART_Init(UART4 , &USART_InitStructure);

USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);// 若接收数据寄存器满，则产生中断

USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);

USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);

USART_ITConfig(UART4 , USART_IT_RXNE, ENABLE);

USART_Cmd(USART1, ENABLE); //启动串口

USART_Cmd(USART2, ENABLE);

USART_Cmd(USART3, ENABLE);

USART_Cmd(UART4, ENABLE);

//-----如下语句解决第1个字节无法正确发送出去的问题-----//

USART_ClearFlag(USART1, USART_FLAG_TC);// 清标志

USART_ClearFlag(USART2, USART_FLAG_TC);

USART_ClearFlag(USART3, USART_FLAG_TC);

USART_ClearFlag(UART4 , USART_FLAG_TC);

}

//********** 串口中断函数 ********************

void UART5_IRQHandler(void)

{

uchar x,y,z;

uint checksum1,checksum2;

if(USART_GetITStatus(UART5, USART_IT_RXNE) != RESET) //若接收数据寄存器满

{

x=USART_ReceiveData(UART5);

}

Com5TxChar(x);

}

//------------------------------------------------

void USART1_IRQHandler(void)

{

if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //若接收数据寄存器满

{

Com1RecDat[Com1RecCnt]=USART_ReceiveData(USART1);

}

Com1RecCnt++;

Com1RecCnt%=C1_LEN;

Com1TxChar(USART_ReceiveData(USART1));

}

//----------------------------------------------

void USART2_IRQHandler(void)

{

if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET) //若接收数据寄存器满

{

Com2RecDat[Com2RecCnt]=USART_ReceiveData(USART2);

}

Com2RecCnt++;

Com2RecCnt%=C1_LEN;

Com2TxChar(USART_ReceiveData(USART2));

}

//-------------------------------------------------

void USART3_IRQHandler(void)

{

if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET) //若接收数据寄存器满

{

Com3RecDat[Com3RecCnt]=USART_ReceiveData(USART3);

}

Com3RecCnt++;

Com3RecCnt%=C1_LEN;

Com3TxChar(USART_ReceiveData(USART3));

}

//----------------------------------------------------

void UART4_IRQHandler(void)

{

if(USART_GetITStatus(UART4, USART_IT_RXNE) != RESET) //若接收数据寄存器满

{

Com4RecDat[Com4RecCnt]=USART_ReceiveData(UART4);

}

Com4RecCnt++;

Com4RecCnt%=C1_LEN;

Com4TxChar(USART_ReceiveData(UART4));

}

//*****************主函数************************

int main(void)

{

u8 ld[69]=0;

u8 i;

RCC_Configuration();

GPIO_Configuration();

NVIC_Configuration();

UART5_Configuration();

USART_Configuration();

TIM2_Configuration();

SysTick_Configuration();

for(i=0;i<69;i++)

{

ld[i]=i;

}

Com1TxStr(ld,69);

Com2TxStr(ld,69);

Com3TxStr(ld,69);

Com4TxStr(ld,69);

Com5TxStr(ld,69);

while(1)

{

}