On and Off ok

main.c

@@ -1,27 +1,53 @@
 // LED application in C by
-// Gerado Marx Chavez Campos
-// 26/04/2021
-//
-//
-
-
+// Gerado Marx Chavez Campos, 26/04/2021
 #include<stdio.h>
 #include<stdlib.h>
 #include<string.h>
 
 #define LED3PATH "/sys/class/leds/beaglebone:green:usr3"
+#define bon "/brightness"
+#define trg "/trigger"
 
 //Function prototypes
 void WriteLED(char fileName[], char value[]);
 void RemoveTrigger();
 
 //main
-int main(int argc, char* argvp[]){
+int main(int argc, char* argv[]){
 	if(argc!=2){
-		printf("Incorrect use...");
+		printf("Incorrect use of command...\n");
+		printf("Please use LEDc with:\n");
+		printf("on, off, flash or status.\n");
+		printf("\n");
+		printf("Example: LEDc on\n");
 		return 2;
 	}
-printf("LED Application Done");
+	printf("Starting Application...\n");
+	//checking the command argument:
+	if(strcmp(argv[1], "on")==0){
+		printf("Turning LED on\n");
+		RemoveTrigger();
+		WriteLED(bon,"1");
+	}
+	else if(strcmp(argv[1], "off")==0){
+		printf("Turning LED off\n");
+		RemoveTrigger();
+		WriteLED(bon,"0");
+	}
+printf("LED Application Done\n");
 return 0;
 }
 
+//complete functions here:
+void WriteLED(char filename[], char value[]){
+	FILE* fp; //file pointer
+	char fileName[100]; //var to store path and file
+	sprintf(fileName, LED3PATH "%s", filename);
+	fp = fopen(fileName, "w+");
+	fprintf(fp, "%s", value);
+	fclose(fp);
+}
+void RemoveTrigger(){
+	WriteLED(trg, "none");
+}
+