212 lines
2.6 KiB
C
212 lines
2.6 KiB
C
#include <reg52.h>
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#include "display.h"
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#include "delay.h"
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// DB P1
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// CTL P3
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sbit RS = P3 ^ 0;
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sbit RW = P3 ^ 1;
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sbit E = P3 ^ 2;
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sbit CSA = P3 ^ 4;
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sbit CSB = P3 ^ 5;
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// 2 Screen 8 Page 64 Line
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static unsigned char displayCache[2][8][64]={0};
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static unsigned char sDisplayCache[32][16]={0};
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static unsigned char lock=0;
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void addDot(unsigned char x, unsigned char y)
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{
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if(lock)
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return;
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displayCache[x / 64][y / 8][x % 64] += 1 << (y % 8);
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}
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void sAddDot(unsigned char x, unsigned char y)
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{
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if(x>31|y>15|lock)
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return;
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addDot(2*x,2*y);
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addDot(2*x,2*y+1);
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addDot(2*x+1,2*y);
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addDot(2*x+1,2*y+1);
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}
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void cacheLock()
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{
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lock=1;
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}
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void cacheUnlock()
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{
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lock=0;
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}
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unsigned char checkLock()
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{
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return lock;
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}
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void write()
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{
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RW = 0;
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E = 0;
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E = 1;
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delay(2);
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E = 0;
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}
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void draw()
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{
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unsigned int i, j;
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if(!lock)
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return;
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else
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lock=0;
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CSA = 1;
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CSB = 0;
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for(i = 0; i < 8; i++)
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{
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RS = 0;
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RW = 0;
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P1 = 0xb8 + i;
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write();
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P1 = 0X40;
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write();
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for(j = 0; j < 64; j++)
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{
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RS = 1;
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RW = 0;
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P1 = displayCache[0][i][j];
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write();
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}
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}
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CSA = 0;
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CSB = 1;
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for(i = 0; i < 8; i++)
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{
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RS = 0;
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RW = 0;
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P1 = 0xb8 + i;
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write();
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P1 = 0X40;
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write();
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for(j = 0; j < 64; j++)
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{
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RS = 1;
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RW = 0;
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P1 = displayCache[1][i][j];
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write();
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}
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}
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}
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void clear()
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{
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unsigned int i, j;
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CSA = 1;
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CSB = 0;
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for(i = 0; i < 8; i++)
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{
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RS = 0;
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RW = 0;
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P1 = 0xb8 + i;
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write();
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P1 = 0X40;
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write();
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for(j = 0; j < 64; j++)
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{
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RS = 1;
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RW = 0;
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P1 = 0x00;;
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write();
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}
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}
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CSA = 0;
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CSB = 1;
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for(i = 0; i < 8; i++)
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{
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RS = 0;
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RW = 0;
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P1 = 0xb8 + i;
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write();
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P1 = 0X40;
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write();
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for(j = 0; j < 64; j++)
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{
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RS = 1;
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RW = 0;
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P1 = 0x00;
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write();
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}
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}
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}
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void init()
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{
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E = 0;
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RS = 1;
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CSA = 1;
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CSB = 0;
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RS = 0;
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P1 = 0X3F;
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write();
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CSA = 0;
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CSB = 1;
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RS = 0;
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P1 = 0X3F;
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write();
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}
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void test()
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{
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unsigned int i, j, k;
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for(i=0;i<2;i++)
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for(j=0;j<8;j++)
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for(k=0;k<64;k++)
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displayCache[i][j][k]=0x55;
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cacheLock();
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draw();
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}
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void writeData(unsigned char d)
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{
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RS = 1;
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RW = 0;
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P1 = d;
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}
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void setCommand(unsigned char d)
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{
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RS = 0;
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RW = 0;
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P1 = d;
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}
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void setPage(unsigned char p)
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{
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setCommand(0xb8 + p);
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}
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void setLine(unsigned char p)
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{
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setCommand(0xc0 + p);
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}
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void setY(unsigned char p)
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{
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setCommand(0x40 + p);
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} |