STC89C52RC 驱动16x64LED点阵模块驱动记录（一）
一、背景
半年前某宝上购得LED点阵驱动板：
模块显示面板由16个8*8点阵屏拼为16x64点阵，主控芯片为STC89C52，行扫描为1个74HC154(4-16译码器)，列扫描为8个74HC595(8位串行输入、并行输出的位移缓存器)。板上还有1块flash存储芯片sst29ee020（256k*8，感觉是字库），配合它工作的是74hc573锁存器（隔离sst29ee020输入输出，复用MCU IO）；另外还有1个DS1302时钟芯片。
二、源码
#include <STC89C5xRC.H>
sbit SH_CP = P1^5;
sbit DS = P2^7;
sbit ST_CP = P1^6;
//PCtoLCD2002
//
unsigned char code Table_row[] = {
//这个调了好久，现在贴的不知道是不是实际跑的字模了
//阳码，顺向，逐行式，C51,左右反转
0xFE,0xFF,0xFE,0xFF,0xFE,0xC0,0xC0,0xDF,0xDF,0x5F,0xEF,0x6D,0xFD,0xAB,0xFD,0xD7,
0xFD,0xF7,0xFA,0xEB,0xFA,0xDB,0xF7,0x5D,0xF7,0x7E,0xEF,0xBF,0xDF,0xDF,0xBF,0xEF,/*"欢",0*/
0xFF,0xFF,0xFE,0xFB,0xC3,0x37,0xDB,0xB7,0xDB,0xBF,0xDB,0xBF,0xDB,0xB0,0xDB,0xB7,
0xDB,0xB7,0xD2,0xB7,0xEB,0x37,0xFB,0xB7,0xFB,0xF7,0xFB,0xEB,0x80,0x1D,0xFF,0xFF,/*"迎",1*/
0xFF,0x7F,0xEF,0x7B,0xEF,0x77,0xF7,0x6F,0xFB,0x6F,0xFF,0x7F,0x80,0x00,0xFD,0xDF,
0xFD,0xDF,0xFD,0xDF,0xFD,0xDF,0xBD,0xEF,0xBD,0xEF,0xBD,0xF7,0x83,0xFB,0xFF,0xFC,/*"光",2*/
0xFE,0xEF,0xFE,0xEF,0xFE,0xEF,0x80,0x6D,0xFD,0x6D,0xFB,0xAD,0xFB,0xCD,0xFF,0xED,
0xC0,0x6D,0xDB,0x6D,0xDB,0x6D,0xDB,0x6D,0xDB,0x6D,0xC0,0x6F,0xDF,0x6F,0xFF,0xEF,/*"临",3*/
};
/*
void delayms(unsigned int m)
{
int i,j;
for(i=0; i<m; i++)
for(j=0; j<120; j++);
}
*/
void HC595(unsigned char dat)
{
unsigned char j;
for(j=0;j<8;j++)
{
SH_CP = 0; //为移位准备
DS = dat & 0x01; //先低位
dat=dat>>1;
SH_CP =1; //上升沿，移位
}
}
void Matrix16x16(unsigned char num)
{
unsigned char k,i;
unsigned int m,n;
unsigned char Char_num=num*32;
for(m=0;m<Char_num;m++) //为移动预留
{
for(n=0;n<16;n++)//控制显示速度，防止闪烁
{
for(k=0;k<16;k++) //行扫描
{
for(i=0;i<num;i++) //控制第几个字
{
HC595(Table_row[(32*i+2*k+1)]); //
HC595(Table_row[(32*i+2*k+0)]); //
}
ST_CP = 0;
ST_CP = 1; //并行输出
//P1=k; //P1低4位为74HC154输入，高4位未使用
P1=16-k; //从左往右显示
//delayms(2);
}
}
}
}
void main(){
while(1){
Matrix16x16(4);
}
}
文章内容成文于半年前，先发于个人blog。
听说发文可以得芯愿，换MCU，^-^{:titter:}。
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