c语言怎么实现串口通信

编程原理

程序1为查询通信方式接口程序，为一典型的数据采集例程。其中bioscom()函数初始化COM1(此函数实际调用BIOS

INT

14H中断0号功能)。这样在程序中就避免了具体设置波特率因子等繁琐工作，只需直接访问发送/接收寄存器(3F8H)和线路状态寄存

我用的新唐芯片，8051内核，跟51差不多，望采纳

void UART_Initial (void)

{

P02_Quasi_Mode //Setting UART pin as Quasi mode for transmit

P16_Quasi_Mode //Setting UART pin as Quasi mode for transmit

SCON_1 = 0x50 //UART1 Mode1,REN_1=1,TI_1=1

T3CON = 0x08 //T3PS2=0,T3PS1=0,T3PS0=0(Prescale=1), UART1 in MODE 1

clr_BRCK

RH3= HIBYTE(65536 - (1000000/u32Baudrate)-1) /*16 MHz */

RL3= LOBYTE(65536 - (1000000/u32Baudrate)-1) /*16 MHz */

set_TR3//Trigger Timer3

}

以上是初始化的

void Send_Data_To_UART1(UINT8 c)

{

TI_1 = 0

SBUF_1 = c

while(TI_1==0)

}

这个是发送

void UART_isr (void) interrupt 4 //串行中断服务程序

{

if (RI_1==1)

{ /* if reception occur */

clr_RI_1/* clear reception flag for next reception */

Receive_Date[c] = SBUF_1

if (Receive_Date[0] == First_Date)

{

c++

}

else if(Receive_Date_Size >0 &&Receive_Date_Size <4)

{

c++

}

else if(Receive_Date[c] == Last_Date &&Receive_Date_Size ==4)

{

c = 0

Flag_Receive_One = 1

}

else

{

c = 0

}

}

}

接收

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