This Code is only visible to Registered users. Please Login/Register

// Program for Seven segment multiplexing using PIC18F4550 Microcontroller

// Configuration bits
/* _CPUDIV_OSC1_PLL2_1L,  // Divide clock by 2
   _FOSC_HS_1H,           // Select High Speed (HS) oscillator
   _WDT_OFF_2H,           // Watchdog Timer off
   MCLRE_ON_3H            // Master Clear on
*/

#define seg_port LATD
#define seg_unit LATA.F0
#define seg_decade LATA.F1
#define seg_hundred LATA.F2
#define seg_thousand LATA.F3
unsigned int i=0,j=0,k=0;

void main(void)
{
	unsigned int value[10]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90};
	unsigned int count,num0,num1,num2,num3,num4;
	TRISA=0;		// Configure PortA as output port
	LATA=0;
	TRISD=0;		// Configure PortD as output port
	LATD=0;

	for(count=0;count<9999;count++)		// Counter from 0 to 9999
	{
		num0=count;

		num1=num0%10;			// Extract the value of unit digit
		num0=num0-num1;
		num0=num0/10;

		num2=num0%10;			// Extract the value of decade digit
		num0=num0-num2;
		num0=num0/10;
                  
		num3=num0%10;			// Extract the value of hundred digit
		num0=num0-num3;
		num0=num0/10;
                  
		num4=num0%10;			// Extract the value of thousand digit
		num0=num0-num4;
		num0=num0/10;
                  
		for(i=0;i<10;i++)		// Delay= ((5msx4)x10) = 200ms between two consecutive counts
		{
			
			seg_unit=1;seg_decade=0;seg_hundred=0;seg_thousand=0;		// Display unit digit
                        seg_port=value[num1];
                        Delay_ms(5);
                        
                        seg_unit=0;seg_decade=1;seg_hundred=0;seg_thousand=0;		// Display decade digit
                        seg_port=value[num2];
                        Delay_ms(5);
                        
                        seg_unit=0;seg_decade=0;seg_hundred=1;seg_thousand=0;		// Display hundred digit
                        seg_port=value[num3];
                        Delay_ms(5);
                        
                        seg_unit=0;seg_decade=0;seg_hundred=0;seg_thousand=1		// Display thousand digit
                        seg_port=value[num4];
                        Delay_ms(5);
		}
	}
}