serial.c

8051带32Mflash的源代码

#include "SERIAL_H.H"

/*------------------------------------------------------------------
              	init serial 
------------------------------------------------------------------*/
void serial_init(void)
{	
	EA=0;
	AUXR |=0x00;        //seial 12 time
	SCON  = 0x50;       //SCON: serail mode 1, 8-bit UART, enable ucvr 
    TMOD |= 0x20;       //TMOD: timer 1, mode 2, 8-bit reload 
    PCON |= 0x80;       //SMOD=1;  X2-->
    TH1   = 0xF4;       //Baud:4800  fosc=11.0592MHz 
//  IE   |= 0x90;       //Enable Serial Interrupt 
	ES=1;
	TR1=1;			// timer 1 run 
	EA=1;

	send_ok_flag=0;
	receive_ok_flag=0;
}

/*------------------------------------------------------------------
              	transmit one char 
------------------------------------------------------------------*/
void putchar(uchar t_c)
{
	          
	SBUF=t_c;
	while(send_ok_flag==0);
	send_ok_flag=0;
	
}

void putword(uint value)
{	
	putchar((uchar)(value>>8));
	delay10ms(60);
	putchar((uchar)value);

}

/*------------------------------------------------------------------
              	receive one char 
------------------------------------------------------------------*/
uchar getchar(void)
{
	while(receive_ok_flag==0);
	receive_ok_flag=0;
	return(r_c);
}

uint getword(void)
{
	uint value1,value2;
	value1=getchar();
//	delay10ms(50);
	value2=getchar();
//	delay10ms(50);
	value1=(value1<<8)|value2;
	return(value1);
}

/*------------------------------------------------------------------
              	serial interrupt sub program
------------------------------------------------------------------*/
void serial_isr(void) interrupt 4 
{	EA=0;
	if(TI!=0)
	{	TI=0;
		send_ok_flag=1;
	}	
	if(RI!=0)
	{	RI=0;
		r_c=SBUF;
		receive_ok_flag=1;
	}
	EA=1;
}