main.c

本程序可以实现串口通信及液晶显示功能

//==================================================
//程序以89c2051为基础，串行口以19200波特率（11.059M晶振）
//==================================================
#include ".\main.h"
#include <math.h>   

#define DataPort P1                // 数据端口
#define Busy    0x80

// 控制引脚定义，不同的连接必须修改的部分
sbit RS=P3^5;
sbit RW=P3^4;
sbit Elcm=P3^7; 

//sbit UP = P3^0;
//sbit DOWN = P3^1;

//------------------0123456789abcdef---------------------------------				 
code char exampl[]="Time:   :  :    ";

 
union word_union
{
	WORD w;
	BYTE b[2];
};


bit     r_done;
bit		flash;		   //20041205
bit		flash_sec;	
bit		flash_min;
bit		flash_hour;

byte code TABLE[] = {0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39};
byte data Clock[3]  = {0,0,0};
byte Number;
byte    time_set;
data word p;



bit  gBt_TxBusy;
data BYTE gB_RxIndex;
data BYTE gBa_DebugBuf[RXDBUFSIZE];

data  	word 	gB_T1count;    //0.5ms一个单位;
data 	word	gB_T2count;

byte obj_speed;
byte avg_speed;

byte data RxCt;
byte data RxBuf[10];

void Init8051Regs(void);
void clearbuff(void);

//--------------------------------------------------------------
void WaitForEnable( void );
void LcdWriteData( char dataW );
void LcdWriteCommand( Uchar CMD,Uchar AttribC );
void LcdReset( void );
void Display( Uchar dd );
void DispOneChar(Uchar x,Uchar y,Uchar Wdata);
void ePutstr(Uchar x,Uchar y, Uchar code *ptr);

void Delay5Ms(void);
 
///////////////////////////////////////////////////////////////////////////////
//      void InitAll(void)                                                                     //
///////////////////////////////////////////////////////////////////////////////

void Init8051Regs(void)
{
  EA = 0;

//SCON ----||----  SM0 SM1 SM2 REN TB8 RB8 T1 RI
	  SCON  = 0x50;   // SCON: mode 1, 8-bit UART, enable rcvr 
	  PCON |= 0x00;       
	
	  TMOD |= 0x23;       // TMOD: timer 1, mode 2, 8-bit reload 
	//  TH1   = 0xf3;        // TH1:  reload value for 9600 baud @ 24MHz WINBOND
	  TH1   = 0xfd;        // TH1:  4800 baud @ 11.0596MHz 89c2051
	  TL1   = 0xfd;        //fd-->9600 fa-->4800 f4-->2400 0xe8-->1200
	  TI    = 1;          // TI:   set TI to send first char of UART 
	  ES = 1;
  	//--------------------------
	  TL0 = 0x47;      //  
	  TR0  = 1;
	  ET0 = 1;
	//---------------------------
	  TH0 = 0x00;        //
	  TR1   = 1;          // TR1:  timer 1 run */
	  ET1   = 1;    //Disable timer 0 irq

  EA = 1;   // global interrupt enable on
}


/////////////////////////////////////////////////////////////
//  Function:   Main()                                    //
//  Description:     //
//                             //
//////////////////////////////////////////////////////////
void main(void) 
{
  	Init8051Regs();

    LcdReset();
    Delay5Ms();
    ePutstr(0,0,exampl);        // 上面一行显示一个预定字符串
	Delay5Ms();
 
	r_done = 1;			//20041205  有效计时

	SBUF = 0x55;

  while ( 1 )               // Infinite loop
  {  
	multi_tasking();
  }
}

//=======================================
//=Module Name: multi_tasking()         =
//=Function:  task allocation     =
//=======================================
void multi_tasking(void)
{
byte bLen ;
		if ( gB_RxIndex )
		{
			bLen = gB_RxIndex;
			Delay1ms(1);
			while ( gB_RxIndex > bLen )
			{
				bLen = gB_RxIndex;
				Delay1ms(1);
			}

			switch ( gBa_DebugBuf[0] )
			{
				case 'u':
					printf("uU");
					printB(0x13,1);
					clearbuff();
				break;

				case 'r':
				{	printf("EL\r\n");	clearbuff();	}
				break;

				case 't':
				{	printf("test done\r\n");	clearbuff();	}
				break;

				case 'E':
				{		printf("RCVOK\r\n");
						printf("ERASEOK\r\n");
						printf("EERR3\r\n");
						printf("EERR4\r\n");
					clearbuff();
				}
				break;
								
				case 'R':
				{	printf("RCVOK\r\n");
						printf("Unknow Flash");
					clearbuff();
				}
				break;

				case 'S':
				{		printf("SERR1\r\n");
						printf("SERR2\r\n");
						printf("SERR3\r\n");
						printf("SERR4\r\n");
					printf("RCVOK\r\n");
					clearbuff();
				}
				break;

				case 'W':
				{	printf("RCVOK\r\n");
						printf("PROGRAMOK\r\n");
						printf("VERIFYERR\r\n");
					clearbuff();
				}
				break;

				default:
				   clearbuff();
				break;
			}

		}
}

//-------------------------------------------
void clearbuff(void)
{
byte i;
	for(i = 0; i < gB_RxIndex; i++)
	{ gBa_DebugBuf[i] = 0; }
	gB_RxIndex = 0;
}
///////////////////////////////////////////////////////////////////////////////
//      interrupt                                                              //
///////////////////////////////////////////////////////////////////////////////
void TIME0(void) interrupt 0x01 using 1// for TIME0   0.2ms
{ 
 	TL0 = 0x47;      //  
    gB_T1count++;
}

void TIME1(void) interrupt 0x03 using 1// for TIME0   0.2ms
{ 
	TH0 = 0x00; 
    gB_T2count ++;
   	//-----------------------------------------
    p++	;
	  if(p>=2500)
      {
		   p = 0;
		   if(r_done)			 		//20041205  有效计时
  		  {
		   Clock[0] = Clock[0]+1; 
			SBUF = 	 Clock[0] ;
			   if(Clock[0]>=60)
			      {
			        Clock[0] = 0 ;
				    Clock[1] = Clock[1]+1 ;
				        if(Clock[1]>=60)
					       {
					         Clock[1] = 0 ;
						     Clock[2] = Clock[2]+1 ;
								 if(Clock[2]>=24)
 								    {
									   Clock[2] = 0 ;
									}   
							}		  
					}
		   }
	  }
}
	

/*=======================================================
显示字符串
=======================================================*/
void ePutstr(Uchar x,Uchar y, Uchar code *ptr) 
{
Uchar i,l=0;
    while (ptr[l] >31){l++;};

    for (i=0;i<16;i++)        
	{ DispOneChar(x++,y,ptr[i]);
        if ( x == 16 ){
            x = 0; y ^= 1;
        }
    }
}
/*=======================================================
显示光标定位
=======================================================*/
void Disp_XY( char posx,char posy) {

Uchar temp;

    temp = posx & 0xf;
    posy &= 0x1;
    if ( posy )temp |= 0x40;
    temp |= 0x80;
    LcdWriteCommand(temp,0);
}

/*=======================================================
按指定位置显示数出一个字符
=======================================================*/
void DispOneChar(Uchar x,Uchar y,Uchar Wdata) {

    Disp_XY( x, y );                // 定位显示地址
    LcdWriteData( Wdata );            // 写字符
}

/*=======================================================
初始化程序, 必须按照产品资料介绍的初始化过程进行
=======================================================*/
void LcdReset( void ) 
{
    LcdWriteCommand( 0x38, 0);            // 显示模式设置(不检测忙信号)
        Delay5Ms();
    LcdWriteCommand( 0x38, 0);            // 共三次
        Delay5Ms();
    LcdWriteCommand( 0x38, 0);
        Delay5Ms();

    LcdWriteCommand( 0x38, 1);            // 显示模式设置(以后均检测忙信号)
    LcdWriteCommand( 0x08, 1);            // 显示关闭
    LcdWriteCommand( 0x01, 1);            // 显示清屏
    LcdWriteCommand( 0x06, 1);            // 显示光标移动设置
    LcdWriteCommand( 0x0c, 1);            // 显示开及光标设置
}

/*=======================================================
写控制字符子程序: E=1 RS=0 RW=0
=======================================================*/
void LcdWriteCommand( Uchar CMD,Uchar AttribC ) {

    if (AttribC) WaitForEnable();                // 检测忙信号?

    RS = 0;  RW = 0; _nop_();

    DataPort = CMD; _nop_();
    // 送控制字子程序

    Elcm = 1; _nop_(); _nop_();Elcm = 0;            // 操作允许脉冲信号
}

/*=======================================================
当前位置写字符子程序: E =1 RS=1 RW=0
=======================================================*/
void LcdWriteData( char dataW ) {

    WaitForEnable();
        // 检测忙信号

    RS = 1; RW = 0; _nop_();

    DataPort = dataW;  _nop_();

    Elcm = 1;  _nop_(); _nop_();  Elcm = 0;        // 操作允许脉冲信号

}

/*=======================================================
正常读写操作之前必须检测LCD控制器状态:    CS=1 RS=0 RW=1
DB7:    0  LCD控制器空闲; 1  LCD控制器忙
========================================================*/
void WaitForEnable( void ) {

    DataPort = 0xff;

    RS =0; RW = 1; _nop_();
	 Elcm = 1;  _nop_(); _nop_();

    while( DataPort & Busy );

    Elcm = 0;
}

// 短延时
void Delay5Ms(void)
{
    Uint i = 5552;
    while(i--);
}