uart.c

使用单片机控制AD9851输出正弦波

/*******************************************************************/
#include "UART.h"

#define BUF_LEN	16
extern uint8 COM_IN;
uint8 UART_BUF[BUF_LEN+1];
/*******************************************************************/
void UART0_Init()
{
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; 
TH1   = 0xF4;       //Baud:4800  fosc=11.0592MHz 
TL1   = 0xF4;
IE   |= 0x90;       //Enable Serial Interrupt 
TR1   = 1;          // timer 1 run 
}
/*******************************************************************/
void UART0_SendByte(uint8 da)
{
EA  =  0;
SBUF = da;
while(TI==0);
TI=0;
EA = 1;
}
/*******************************************************************/
UART0_Rcv(void)interrupt 4
{
uint8  ch,temp;

EA = 0;
if(RI)
    {
    	RI = 0;
     	ch=SBUF;
		if(ch>='0' && ch<='9')
			{
			temp = UART_BUF[0]+1;
			if(temp==BUF_LEN)
				{
				temp=1;
				}
			UART_BUF[0]=temp;
			UART_BUF[temp]=ch;
			UART0_SendByte(UART_BUF[temp]);
			}
		if(ch==0x0d)COM_IN=1;
		else COM_IN=0;		   
    }
EA = 1;
}
/******************************************************************/
void UART0_SendStr(uint8  *str)
{
uint8 i;
i=0;
while((*(str+i))!='\0')
	{
	UART0_SendByte(*(str+i));
	i=i+1;
	}
}
/******************************************************************/
void UART0_SendUint32(uint32 da)
{

uint8 flag;//第一次非0标志，1有效
uint8 temp;
flag=0;

da=da%100000000;

temp=da/10000000;
if(temp!=0 || flag!=0)
	{
	flag=1;
	UART0_SendByte(temp+'0');
	}
da=da%10000000;

temp=da/1000000;
if(temp!=0 || flag!=0)
	{
	flag=1;
	UART0_SendByte(temp+'0');
	}
da=da%1000000;

temp=da/100000;
if(temp!=0 || flag!=0)
	{
	flag=1;
	UART0_SendByte(temp+'0');
	}
da=da%100000;

temp=da/10000;
if(temp!=0 || flag!=0)
	{
	flag=1;
	UART0_SendByte(temp+'0');
	}
da=da%10000;


temp=da/1000;
if(temp!=0 || flag!=0)
	{
	flag=1;
	UART0_SendByte(temp+'0');
	}
da=da%1000;


temp=da/100;
if(temp!=0 || flag!=0)
	{
	flag=1;
	UART0_SendByte(temp+'0');
	}
da=da%100;

temp=da/10;
if(temp!=0 || flag!=0)
	{
	flag=1;
	UART0_SendByte(temp+'0');
	}
da=da%10;

UART0_SendByte(da+'0');

}
//******************************************************************//