source1.#2

c8051f020的lcd显示 可以直接应用 lcd是12864,驱动器ks0108

#include <c8051f020.h>


#define BAUDRATE     9600        	/*UART0的波特率*/
#define SYSCLK       11059200    	/*系统时钟*/
sbit buz = P2^5;

bit	ReceiveBit;				/*接收标志位*/
unsigned char temp;

void delay(unsigned int m)
{
	unsigned int n;
	n=0;
	while(n < m)
	{n++;}
	return;
}

void SYSCLK_Init (void)
{
   int i;                              /*延时计数器*/
   OSCXCN = 0x67;                      /*打开外部晶体振荡器*/
   for (i=0; i < 256; i++);            /*延时*/

   while (!(OSCXCN & 0x80));           /*查询外部晶体是否稳定起振*/

   OSCICN = 0x88;                      /*用外部晶体作为系统时钟,并使能时钟丢失检测*/
}

void PORT_Init (void)
{
XBR0    |= 0x17;                    // Enable CEX0 on P0.0
	XBR1    |= 0x00;
	XBR2    |= 0x44;                    // Enable crossbar and weak pull-ups
	P0MDOUT |= 0x1D;                    // enable P0.0 as a push-pull output
	P1MDOUT = 0xFD; 					// Output configuration for P1
	P2MDOUT = 0x00; 					// Output configuration for P2
	P3MDOUT = 0x00; 					// Output configuration for P3
	P74OUT  = 0x00;  					// Output configuration for P4-7

	P1MDIN = 0xFF;  					// Input configuration for P1
	P5 = 0xFF;
}

void UART0_Init (void)
{
   SCON0   = 0x50;                     /*SCON0:模式1,8位UART,时能RX*/
   TMOD    = 0x20;                     /*TMOD: 定时器工作再模式2, 8位重载*/
   TH1     = -(SYSCLK/BAUDRATE/16);    /*设置定时1用作波特率的重载值*/
   TR1     = 1;                        /*开定时器1*/

}


/*串口中断0子程序*/
void UART0_ISR (void) interrupt 4 using 3
{
	if(RI0 == 1)              //是发送中断还是接收中断
  	{
		RI0 = 0;			/*清接收标志位*/
		temp =SBUF0; 		/*保存接收到的数据*/
  		ReceiveBit=1;      	/*置接收标志*/
  	}
 	TI0 = 0; 				/*清发送标志位*/
}

//-----------------------------------------------------------------------------
// MAIN Routine      
//-----------------------------------------------------------------------------

void main(void)
{
	unsigned char i;
	WDTCN = 0xde;                       /*关看门狗*/
   	WDTCN = 0xad;
    ReceiveBit=0;
   	SYSCLK_Init();                      /*初始化系统时钟*/
   	PORT_Init();                        /*初始挂交叉开关和I/O口*/
   	UART0_Init();                       /*初始化UART0*/
   	EA=1;                               //开中断
   	ES0=1; 
    while(1)
	{
	while (ReceiveBit==1)               /*是否接收到一个数据*/
	{			
    		ES0=0;						/*关串口中断0*/
			EA=0;						/*关总中断*/
			ReceiveBit=0;				/*清接收标志位*/
			delay(60000);				/*延时*/
			delay(60000);
			delay(60000);
            SBUF0=temp;					/*将接收到数据送出*/
            while(TI0==0);				/*发送标志位是否产生*/
			TI0=0;						/*清发送标志位*/
             buz=0;
             for(i=0; i<3; i++)			/*延时*/
			{
				delay(60000);
			}
         buz=1;
            ES0=1;						/*开中断标志*/
			EA=1;
		}

	}
}