/*************************************************
程序名稱:32x64LED點陣上顯示32X32的漢字
日期    :2006.11.25
程序說明:一個漢字占128個字節，點陣每一行數據占4個字節
作者	:liuanggh	
*************************************************/
#include <reg52.h>
#include "P1.h"

sbit  	LOAD 	=P3^2;	//74LS595鎖存
sbit  	RST 	=P3^3;  //
sbit 	SLECET 	=P2^3;  //74LS138譯碼器使能端,低電平有效

uchar code line[] = {   //行掃描段碼
						0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07
					};
uchar line_count;			//行計數器
uchar move_count;			//移位計數器
uchar font_count;			//字計數器
uchar buff[16] = {0x00};				//一行有64列,每8列數據占一個字節，所以緩沖區需要8個字節

void transform_data();  //數據轉換
void send_data();  		//串行發送8個字節的數據

main()
{
	uchar i;
	uchar j = 0;
	SCON = 0;			//串口工作在方式0下
	SLECET = 1;     	//138譯碼器無效
	RST = 0;        
	RST = 1;			//595復位
	/*
	for(i = 0; i < 32; i++)
	{
		LOAD = 0;
		send_data();
		LOAD = 1;
		P2 = line[j%8];  //片選138
		P1 = line[i%8];
		if(i%8 == 7)
		j++;		
	}
	*/
	for(i = 0; i < 8; i++)
	{
		P2 = line[i];		//138譯碼器片選
		for(j = 0; j < 8; j++)
		{			
			LOAD = 0;      //保持原有數據
			send_data();	//發送數據
			SLECET = 1; 	//關閉顯示
			LOAD = 1;		//595鎖存數據
			SLECET = 0; 	//138譯碼器有效
			P1 = line[j];	//行掃描
			line_count++;	//行掃描一次，行計數器加1
			if(line_count > 31)
			line_count = 0;
			delay();
		}
	}

}	

void transform_data()  //數據轉換
{
	/*
    uchar temp[5] = {0};
	uchar i;
	for( i = 0; i < 4; i++)
	temp[i] = font[(font_count + i) * 8 + line_count]; //取第i行數據
	for( i = 0; i < 4; i++)
	buff[i] = ( temp[ i ] >> move_count )|( temp[ i + 1] << ( 7 - move_count ) );
	*/
	uchar i;
	for(i = 0; i < 4; i++)
	{
		buff[i] = hanzi[ line_count*4 + i];
	}

	for(i = 4; i < 8; i++)
	{
		buff[i] = hanzi[ line_count*4 + i + 128];
	}

	for(i = 8; i < 12; i++)
	{
		buff[i] = hanzi[ line_count*4 + i + 256];
	}

	for(i = 12; i < 16; i++)
	{
		buff[i] = hanzi[ line_count*4 + i + 384];
	}

}


void send_data()  			//串行發送8個字節的數據
{
	uchar i;
	transform_data();			//數據轉換

	//顯示"陣點"
	for( i = 0; i < 16; i++)
	{
		//SBUF = 0xff;
      SBUF = buff[i];
		while(!TI);
		TI = 0;
	} 

	/*
	//顯示"點陣"
	for( i = 4; i < 8; i++)
	{
		//SBUF = 0xff;
      SBUF = buff[i];
		while(!TI);
		TI = 0;
	} 
	for( i = 0; i < 4; i++)
	{
		//SBUF = 0xff;
      SBUF = buff[i];
		while(!TI);
		TI = 0;
	} 
	*/
}