Add ES/Lab/Lab7/SwitchUPDOWN.c

ES/Lab/Lab7/SwitchUPDOWN.c

@@ -0,0 +1,24 @@
+// Question - Connect a key on P1.23 and LEDs on P0.4-0.11. WAP in EC to display the number of times the PUSH to OFF switch is pressed on LEDs. Alternatively, when it is not pressed, it should be a down counter.
+#include <LPC17xx.h>
+
+int main(){
+	unsigned long x;
+	unsigned char count = 0;
+	
+	LPC_PINCON -> PINSEL0 = 0x0000<<8 ; 		// LED
+	LPC_PINCON -> PINSEL3 = 0; 							// SWITCH
+	
+	LPC_GPIO0 -> FIODIR = 0xFF<<4;					// LED
+	LPC_GPIO1 -> FIODIR = 0 << 23;					// SWITCH
+	
+	while(1){
+		x = LPC_GPIO1 -> FIOPIN & 1 << 23; 		// Initial value to refer to
+		if(!x){
+			count = (count + 1);  					// Counter
+			LPC_GPIO0 -> FIOPIN = count << 4; 	// Modifying FIOPIN value to match count
+		} else {
+			count = (count - 1);  					// Counter
+			LPC_GPIO0 -> FIOPIN = count << 4; 	// Modifying FIOPIN value to match count
+		}
+	}
+}