Design of 16x16 LED dot matrix using single chip microcomputer (74HC154+74LS04 driver)

The 16x16 LED dot matrix designed based on 51 single chip microcomputer uses 74HC154 and 74LS04 as the driver for the 16x16 LED dot matrix.
The simulation schematic diagram is as follows

The microcontroller source program is as follows:

#include

#define uchar unsigned char 

#define uint unsigned int

#define out1 P1

#define out0 P0

#define out2 P2

void delay(uint j)

{

        fly i=250;

        for(;j>0;j--)

        {

                while(--i);

                i=100;

        }

}

uchar code string[]=

{

                0x7F,0xFF,0x7F,0xFF,0x7F,0xFF,0x03,0xE0,0x7B,0xEF,0x7B,0xEF,0x03,0xE0,0x7B,0xEF,

                0x7B,0xEF,0x7B,0xEF,0x03,0xE0,0x7B,0xEF,0x7F,0xBF,0x7F,0xBF,0xFF,0x00,0xFF,0xFF,

        //

                0xFF,0xFF,0x03,0xF0,0xFF,0xFB,0xFF,0xFD,0xFF,0xFE,0x7F,0xFF,0x7F,0xFF,0x7F,0xDF,

                0x00,0x80,0x7F,0xFF,0x7F,0xFF,0x7F,0xFF,0x7F,0xFF,0x7F,0xFF,0x5F,0xFF,0xBF,0xFF,

        //

                0xF7,0xFB,0xF7,0xFB,0xF7,0xFB,0x40,0x80,0xF7,0xFB,0xD7,0xFB,0x67,0xC0,0x73,0xEF,

                0x74,0xEE,0xF7,0xF6,0xF7,0xF9,0xF7,0xF9,0xF7,0xF6,0x77,0x8F,0x95,0xDF,0xFB,0xFF,

        //

                0x7F,0xFF,0x7F,0xFB,0x7F,0xF7,0x7F,0xFF,0x00,0x80,0x7F,0xFF,0x3F,0xFE,0x5F,0xFD,

                0x5F,0xFB,0x6F,0xF7,0x77,0xE7,0x7B,0x8F,0x7C,0xDF,0x7F,0xFF,0x7F,0xFF,0xFF,0xFF

};

void main()

{

        flying i,j,n;

        while(1)

        {

                for(j=0;j<4;j++)

                {

                        for(n=0;n<40;n++)

                        {

                                for(i=0;i<16;i++)

                                {

                                        out1=i%16;

                                        out0=string[i*2+j*32];

                                        out2=string[i*2+1+j*32];

                                        delay(4);

                                        out0=0xff;

                                        out2=0xff;

                                }

                        }

                }

        }

}