1、以下程序在16X16點陣LED上依次顯示“梅川酷子”四個字，分別用正向顯示和反向顯示，間隔兩秒鐘變換一次，電路圖和效果圖下圖所示。AT89c52晶振頻率為24MHz，用TO定時，改變變量flag值，從而讓程序確定顯示哪個漢字和顯示方式（正向or反向）。#include或者#include#defineint8unsignedchar#defineint16unsignedint#defineint32unsignedlongint8flag;/*flag變量MSB76XX5432X10LSBBit5=1，Bit4=0時，負向顯示Bit5=0,Bit4=1時，負向顯示Bit2.074HC138的

2、片選信號*/int8n;int8codetable32=Ox88,OxOO,Ox88,OxOO,Ox88,Ox7F,Ox48,OxOO,OxDF,Ox1F,OxA8,Ox1O,Ox9C,Ox12,OxAC,Ox14,OxEA,Ox7F,Ox8A,Ox12,Ox89,Ox14,Ox88,Ox1O,Ox88,Ox7F,OxO8,Ox10,0 x08,0 x14,0 x08,0 x08,/*梅，0*/OxO8,Ox2O,OxO8,Ox21,OxO8,Ox21,OxO8,Ox21,OxO8,Ox21,OxO8,Ox21,OxO8,Ox21,0 x08,0 x21,0 x08,0 x21,0 x08,0

3、 x21,0 x08,0 x21,0 x08,0 x21,0 x08,0 x21,0 x04,0 x21,0 x04,0 x20,0 x02,0 x00,/*川，1*/0 x00,0 x08,0 xFE,0 x08,0 x28,0 x0A,0 x28,0 x7E,0 xFE,0 x0A,0 xAA,0 x09,0 xAA,0 xFF,0 xEA,0 x00,0 x86,0 x00,0 x82,0 x7E,0 xFE,0 x42,0 x82,0 x42,0 x82,0 x42,0 xFE,0 x7E,0 x82,0 x42,0 x00,0 x00,/*酷，2*/0 x00,0 x00,0 xF8

4、,0 x1F,0 x00,0 x08,0 x00,0 x04,0 x00,0 x02,0 x00,0 x01,0 x00,0 x01,0 x00,0 x41,0 xFE,0 xFF,0 x00,0 x01,0 x00,0 x01,0 x00,0 x01,0 x00,0 x01,0 x00,0 x01,0 x40,0 x01,0 x80,0 x00/*子，3*/;voiddelay(void);voidmain(void)int8i;int8j;int8index;flag=0 x10;n=0;/定時器TO初始化TMOD=0 x01;THO=Oxb1;TLO=OxeO;ETO=1;EA=1;TR

5、O=1;while(1)index=flag&OxO3;if(flag&Ox3O)=Ox1O)/正向顯示for(i=O;i8;i+)/顯示上半屏PO=tableindex2*i;/左上P2=i|OxO8;delay();PO=tableindex2*i+1;/右上P2=i|Ox1O;delay();for(i=8;i16;i+)/顯示下半屏PO=tableindex2*i;/左下P2=(i-8)|Ox2O;delay();PO=tableindex2*i+1;/右下P2=(i-8)|Ox4O;delay();if(flag&0 x30)=0 x20)/反向顯示for(i=0;i8;i+)P0=

6、(tableindex2*i);/左上P2=i|0 x08;delay();P0=(tableindex2*i+1);/右上P2=i|0 x10;delay();for(i=8;i16;i+)P0=(tableindex2*i);/左下P2=(i-8)|0 x20;delay();P0=(tableindex2*i+1);/右下P2=(i-8)|0 x40;delay();voiddelay(void)int16i;for(i=0;i50;i+);voidtimer0()interrupt1using3TF0=0;TH0=0 xb1;TL0=0 xe0;/10ms中斷一次if(n200)n+;else/2秒改變一次switch(flag)case0 x10:flag=0 x11;/下次顯示正向“川”break;case0 x11:flag=0 x12;/下次顯示正向“酷”break;case0 x12:flag=0 x13;/下次顯示正向“子”break;case0 x13:flag=0 x20;/下次顯示負向“川”break;case0 x20:flag=0 x21;/下次顯示負向“梅”break;case0 x2