4 DIGIT Seven Segment Interface

multiplexed 4 digit seven segment with mdelay and mux4() function

Author: abdul-rehman-2050

SEG4_MUX_EX01.c

@@ -0,0 +1,208 @@
+ 
+#include <iostm8s103.h>
+	
+	
+	#define CLR_BIT(p,n) ((p) &= ~((1) << (n)))
+	#define SET_BIT(p,n) ((p) |= (1 << (n)))
+	
+	
+	#define CLR_SEG1	CLR_BIT(PB_ODR,4)
+	#define CLR_SEG2  CLR_BIT(PC_ODR,3)
+	#define CLR_SEG3  CLR_BIT(PC_ODR,4)
+	#define CLR_SEG4  CLR_BIT(PC_ODR,5)
+	
+	
+	
+	#define SET_SEG1	SET_BIT(PB_ODR,4)
+	#define SET_SEG2  SET_BIT(PC_ODR,3)
+	#define SET_SEG3  SET_BIT(PC_ODR,4)
+	#define SET_SEG4  SET_BIT(PC_ODR,5)
+	
+	
+	
+	#define CLR_SEGA  CLR_BIT(PD_ODR,6)
+	#define CLR_SEGB  CLR_BIT(PD_ODR,5)
+	#define CLR_SEGC  CLR_BIT(PD_ODR,4)
+	#define CLR_SEGD  CLR_BIT(PD_ODR,3)
+	#define CLR_SEGE  CLR_BIT(PD_ODR,2)
+	#define CLR_SEGF  CLR_BIT(PC_ODR,7)
+	#define CLR_SEGG  CLR_BIT(PC_ODR,6)
+	
+	#define SET_SEGA  SET_BIT(PD_ODR,6)
+	#define SET_SEGB  SET_BIT(PD_ODR,5)
+	#define SET_SEGC  SET_BIT(PD_ODR,4)
+	#define SET_SEGD  SET_BIT(PD_ODR,3)
+	#define SET_SEGE  SET_BIT(PD_ODR,2)
+	#define SET_SEGF  SET_BIT(PC_ODR,7)
+	#define SET_SEGG  SET_BIT(PC_ODR,6)
+	
+	
+	
+	#define SW1	1
+	#define SW2  2
+	#define SW3  3
+	#define SW_DDR PA_DDR
+	
+	
+void display_num(char num);
+void mux4(void);	
+void delay(long x);
+void mdelay(long x);
+	
+	
+unsigned char digits[4]={1,2,3,4};
+	
+main()
+{
+	unsigned int d;
+	
+	CLR_BIT(SW_DDR,SW1);	//SET SW1 AS INPUT
+	CLR_BIT(SW_DDR,SW2);	//SET SW2 AS	INPUT
+	CLR_BIT(SW_DDR,SW3);	//SET SW3 AS INPUT
+	
+	
+	
+	 PB_DDR = 255;		//PORTB AS OUTPUT
+	 PC_DDR = 255;		//PORTC AS OUTPUT
+	 PD_DDR = 255;
+	 
+	 //PB_DDR = (1<<5);
+	 PB_CR1 = 255;
+	 PD_CR1 = 255;
+	 PC_CR1 = 255;
+	 
+	 CLR_SEG1;
+	 CLR_SEG2;
+	 CLR_SEG3;
+	 CLR_SEG4;
+	 
+	
+	 
+	 
+	 
+	while (1){
+		int cnt = 0;
+		PB_ODR |= (1<<5);
+		mdelay(300);
+		PB_ODR &= ~(1<<5);
+		mdelay(300);
+		
+			
+	}
+	//	mux4();
+		/*for(cnt=0;cnt<11;cnt++){
+			display_num(cnt);
+			delay(500);
+			PB_ODR |= (1<<5);
+			delay(500);
+      PB_ODR &= ~(1<<5);
+		}
+	
+	}*/
+}
+
+void display_num(char num){
+	switch(num){
+		
+		case 0:
+		CLR_SEGA;CLR_SEGB;CLR_SEGC;CLR_SEGD;CLR_SEGE;CLR_SEGF;SET_SEGG;
+		break;
+		
+		case 1:
+		SET_SEGA;CLR_SEGB;CLR_SEGC;SET_SEGD;SET_SEGE;SET_SEGF;SET_SEGG;
+		break;
+		
+		case 2:
+		CLR_SEGA;CLR_SEGB;SET_SEGC;CLR_SEGD;CLR_SEGE;SET_SEGF;CLR_SEGG;
+		break;
+		
+		case 3:
+			CLR_SEGA;CLR_SEGB;CLR_SEGC;CLR_SEGD;SET_SEGE;SET_SEGF;CLR_SEGG;
+		break;
+		
+		case 4:
+			SET_SEGA;CLR_SEGB;CLR_SEGC;SET_SEGD;SET_SEGE;CLR_SEGF;CLR_SEGG;
+		break;
+		
+		case 5:
+			CLR_SEGA;SET_SEGB;CLR_SEGC;CLR_SEGD;SET_SEGE;CLR_SEGF;CLR_SEGG;
+		break;
+		
+		case 6:
+			CLR_SEGA;SET_SEGB;CLR_SEGC;CLR_SEGD;CLR_SEGE;CLR_SEGF;CLR_SEGG;
+		break;
+		
+		case 7:
+			CLR_SEGA;CLR_SEGB;CLR_SEGC;SET_SEGD;SET_SEGE;SET_SEGF;SET_SEGG;
+		break;
+		
+		case 8:
+			CLR_SEGA;CLR_SEGB;CLR_SEGC;CLR_SEGD;CLR_SEGE;CLR_SEGF;CLR_SEGG;
+		break;
+		
+		case 9:
+			CLR_SEGA;CLR_SEGB;CLR_SEGC;CLR_SEGD;SET_SEGE;CLR_SEGF;CLR_SEGG;
+		break;
+		
+		default:
+			SET_SEGA;SET_SEGB;SET_SEGC;SET_SEGD;SET_SEGE;SET_SEGF;SET_SEGG;
+		break;
+		
+		
+	}
+	
+}
+
+
+void mux4(){
+	
+	SET_SEG1;SET_SEG2;SET_SEG3;SET_SEG4;
+	
+	display_num(digits[0]);
+	CLR_SEG1;
+	delay(1);
+	SET_SEG1;
+	
+	
+	delay(1);
+	
+	display_num(digits[1]);
+	CLR_SEG2;
+	delay(1);
+	SET_SEG2;
+	
+	
+	delay(1);
+	
+	display_num(digits[2]);
+	CLR_SEG3;
+	delay(1);
+	SET_SEG3;
+	
+	
+	delay(1);
+	
+	display_num(digits[3]);
+	CLR_SEG4;
+	delay(1);
+	SET_SEG4;
+	
+	delay(1);
+	
+}
+
+
+void delay(long x){
+	char d=0;
+	for(;x>0;x--)
+		for (d = 0; d < 10; d++); //Delay ~ 1 second
+	
+}
+
+void mdelay(long x){
+	long i=0;
+	for(i=0;i<x;i++){
+			mux4();
+	}
+}
+