Use of 8-bit digital tube (74hc595 Chip) based on 51 single chip microcomputer

#include <at89x51. H> #include <intrins.h>//function prototype definition # UCHAR unsigned char#define uint unsigned int void main (void);//main function void L Ed_out (Uchar X);//LED single byte serial shift function void Led_print (Uchar p, Uchar X); unsigned char code led_0f[];//LED Matrix Sbit DIO = p1^0;          Serial data input Sbit RCLK = p1^1;//clock pulse signal--rising edge effective sbit SCLK = p1^2;//incoming signal ———— rising edge valid Uchar buffer[4] = {0};    Data received from the serial//global variable Uchar led[8];//for the LED 8-bit display cache void delay_1ms (UINT i)//1ms delay {Uchar x,j; for (j=0;j<i;j++) for (x=0;x<=148;x++);    }void Init (void) {tmod = 0x20;//8-bit automatic reload count PCON &= 0x7f; SCON = 0x50;//serial Port control register sm1=1,sm0=0 mode Ipport rate variable TH1 = 0xFD;    Set baud rate 9600 TL1 = 0xFD;    TR1 = 1;    Start Timer 1 TI = 0;    RI = 0;    ES = 1;    Open serial Interrupt EA = 1;        Open Total interrupt}//main program void main (void) {Init ();//Initialize Led_print (0x80, 0x0F);//Display boot information while (1) {switch (buffer[0])    {Case 0x30:led_print (0x01, 0);            Break Case 0X31:Led_print (0x01, 1);            Break    Case 0x32:led_print (0x01, 2);            Break    Case 0x33:led_print (0x01, 3);            Break    Case 0x34:led_print (0x01, 4);            Break Default:led_print (0x80, 0x0E);         Break    }}} void Com_int (void) Interrupt 4{EA = 0; if (ri = = 1)//When the hardware receives a data, the RI will place {buffer[0] = sbuf;//minus 48 here because the data sent from the computer is ASCII code.        Buffer[0] = SBUF-48;     RI = 0; } EA = 1;}          void Led_print (Uchar p, Uchar x) {unsigned char code *led_table; Look up the table pointer uchar i;unsigned Long loop;led_table = led_0f + x;i = *led_table; Led_out (i); Led_out (P); RCLK = 0; RCLK = 1;for (loop = 0; loop <; loop++);} void Led_out (Uchar X) {Uchar i;for (i=8;i>=1;i--) {if (x&0x80) dio=1; else dio=0; x<<=1; SCLK = 0; SCLK = 1;}}     unsigned char code led_0f[] = {//0 1 2 3 4 5 6 7 8 9 A b C D E F-0XC0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xF8, 0x80, 0x90, 0x88, 0x83, 0xC6, 0xa1, 0x86, 0x8E, 0XBF}; 

Based on 51 single-chip microcomputer 8-bit digital tube (74hc595 chip) use method