Renamed a "pid" to a "controller"

Because that's what it is.

groundStation/src/cli/cli_getpid.c

@@ -34,33 +34,33 @@ int cli_getpid(struct backend_conn * conn,	int argc, char **argv) {
 
 	int result;
 	if(getAll) {
-		pid_data.pid = ROLL;
+		pid_data.controller = ROLL;
 		if ((result = getValues(conn, &pid_data))) {
 			return result;
 		}
-		pid_data.pid = PITCH;
+		pid_data.controller = PITCH;
 		if ((result = getValues(conn, &pid_data))) {
 			return result;
 		}
-		pid_data.pid = YAW;
+		pid_data.controller = YAW;
 		if ((result = getValues(conn, &pid_data))) {
 			return result;
 		}
 	} else {
 		if(getPitch) {
-			pid_data.pid = PITCH;
+			pid_data.controller = PITCH;
 			if ((result = getValues(conn, &pid_data))) {
 				return result;
 			}
 		}
 		if(getRoll) {
-			pid_data.pid = ROLL;
+			pid_data.controller = ROLL;
 			if ((result = getValues(conn, &pid_data))) {
 				return result;
 			}
 		}
 		if(getYaw) {
-			pid_data.pid = YAW;
+			pid_data.controller = YAW;
 			if ((result = getValues(conn, &pid_data))) {
 				return result;
 			}
@@ -77,7 +77,7 @@ int getValues(struct backend_conn * conn, struct frontend_pid_data * pid_data) {
 
 	return 0;
 
-	switch(pid_data->pid) {
+	switch(pid_data->controller) {
 		case PITCH :
 			printf("Pitch Constants: P = %f\tI = %f\tD = %f\n",
 				pid_data->p, pid_data->i, pid_data->d);
@@ -94,4 +94,4 @@ int getValues(struct backend_conn * conn, struct frontend_pid_data * pid_data) {
 			break;
 	}
 	return 0;
-}
+}
\ No newline at end of file

groundStation/src/frontend/frontend_getpid.c

@@ -23,7 +23,7 @@ int frontend_getpid(
 		struct backend_conn * conn, struct frontend_pid_data * pid_data) {
 	
 	char line[100] = "";
-	switch (pid_data->pid) {
+	switch (pid_data->controller) {
 		case PITCH :
 			strncpy(line, "getpitchp\ngetpitchd\n", 20);
 			break;
@@ -43,4 +43,4 @@ int frontend_getpid(
 	}
 
 	return 0;
-}	
+}	
\ No newline at end of file

groundStation/src/frontend/pid_common.h

 #ifndef PID_COMMON_H
 #define PID_COMMON_H
 
-enum frontend_pid {
+enum pid_controller {
 	PITCH,
 	ROLL,
 	YAW,
@@ -9,7 +9,7 @@ enum frontend_pid {
 };
 
 struct frontend_pid_data {
-	enum frontend_pid pid;
+	enum pid_controller controller;
 
 	float p;
 	float i;