MCD2-DEMO digital tube display PICC-18 example (suitable for beginners)

/**************************************************************
Function implemented: Make the digital tube display 0-5 from left to right on MCD2-DEMO

Chip P IC 18F452
Compiler PI CC -18

XT:4M Hz
********************************************** *******************/

#include "pic18.h"
const unsigned char display_numb[10]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xd8,0x80,0x90};
unsigned char display_data[6];//0:L 5:R
/******************************************************************
Port initialization
LATC as digital tube segment driver (low effective)
LATA as digital tube bit selection driver (low effective)
***************************************************************/
void init_port(void)
{
  LATC=0xff; //
  TRISC=0; //Port C is used as a digital tube segment and set to output
  ADCON1=0x07;
  TR ISA =0; //Port A is used as a digital tube bit selection control pin and set to output   
  LATA=0xff; 
}
/***********************************************************
Delay program
************************************************************/
void delay_1ms(void)
{
  unsigned int n;
  for(n=0;n<50;n++)
   {
    NOP();
   }
}
void delay_ms(unsigned int time)
{
  for(;time>0;time--)
   {
    delay_1ms();
   }
}
/**********************************************************************
The main program
displays 0-5 from left to right
*******************************************************************/
void main(void)
{
  unsigned char n;
  init_port();
  display_data[0]=display_numb[1];//2
  display_data[1]=display_numb[0];//1
  display_data[2]=display_numb[3];//4
  display_data[3]=display_numb[2];//3
  display_data[4]=display_numb[5];//6
  display_data[5]=display_numb[4];//5
  while(1)
   {
    LATA=0xfe;   
    for(n=0;n<6;n++)
     {
      LATC=display_data[n];
      delay_ms(1);
      LATA=(LATA<<1)+1;
     }
   }
}