First commit

.gitignore

@@ -0,0 +1 @@
+led

main.c

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+//This project turns on, off or toggle an LED
+#include<stdio.h>
+#include<stdlib.h>
+#include<string.h>
+
+#define LED3_PATH "/sys/class/leds/beaglebone:green:usr3"
+#define bled "/brightness"
+#define tled "/trigger"
+
+//Protypes:
+void writeLED(char fileName[], char value[]);
+void removeTrigger();
+
+//main:
+////////////////////////////////////////////////////////
+int main(int argc, char* argv[]){
+	printf("Starting app");
+
+	if(argc!=2){
+		printf("Incorrect number of arguments");
+		return 2;
+	}
+
+	if(strcmp(argv[1], "on")==0){
+		printf("LED on");
+		removeTrigger();
+		writeLED(bled, "1");
+		printf("Done");
+	}
+	
+	else if (strcmp(argv[1], "off")==0){
+		printf("LED off");
+		removeTrigger();
+		writeLED(bled, "0");
+		printf("Done");	
+	}
+
+	else if (strcmp(argv[1], "blink")==0){
+		printf("LED blinking");
+		writeLED(tled, "timer");
+		writeLED("/delay_on", "50");
+		writeLED("/delay_off", "50");
+	}
+	
+	else
+		printf("Invalid command!\n");
+	
+	return 0;
+	
+}	
+
+////////////////////////////////////////////////////////
+void writeLED(char fileName[], char value[]){
+	FILE* fp;
+	char fullName[150];
+	sprintf(fullName, LED3_PATH "%s", fileName);
+	fp = fopen(fullName, "w+");
+	fprintf(fp, "%s", value);
+	fclose(fp);
+}
+
+void removeTrigger(){
+	writeLED(tled, "none");
+}	
+