Add PIN and Pulse Length command line arguments

RPi_utils/codesend.cpp

@@ -6,33 +6,86 @@
    which is not suitable for our purposes.  Instead, we call 
    send(code, length); // where length is always 24 and code is simply the code
    we find using the RF_sniffer.ino Arduino sketch.
-
- Usage: ./codesend decimalcode
+ Usage: ./codesend decimalcode [-p <PIN Number>] [-l <Pulse Length>]
  (Use RF_Sniffer.ino to check that RF signals are being produced by the RPi's transmitter)
  */
 
-#include "RCSwitch.h"
 #include <stdlib.h>
 #include <stdio.h>
-
+#include <unistd.h>
+
+#include "RCSwitch.h"
+
+#define DEFAULT_PIN 0
+
+void printUsage(char *argv[]) {
+    printf("Usage: %s <code> [-p <PIN Number> (default: %i)] [-l <Pulse Length>].\n", argv[0], DEFAULT_PIN);
+}
 
 int main(int argc, char *argv[]) {
-
-    // This pin is not the first pin on the RPi GPIO header!
+    int i;
+
+    char * argumentPIN = NULL;
+    char * argumentPulseLength = NULL;
+
+    int c;
+    while ((c = getopt(argc, argv, "p:l:")) != -1) {
+        switch (c) {
+            case 'p':
+                argumentPIN = optarg;
+                break;
+
+            case 'l':
+                argumentPulseLength = optarg;
+                break;
+
+            case '?':
+            default:
+                printUsage(argv);
+                break;
+            }
+    }
+
+    // This PIN is not the first PIN on the Raspberry Pi GPIO header!
     // Consult https://projects.drogon.net/raspberry-pi/wiringpi/pins/
     // for more information.
-    int PIN = 0;
-
-    // Parse the firt parameter to this command as an integer
-    int code = atoi(argv[1]);
-
-    if (wiringPiSetup () == -1) return 1;
-	printf("sending code[%i]\n", code);
-	RCSwitch mySwitch = RCSwitch();
-	mySwitch.enableTransmit(PIN);
-
+    int PIN = DEFAULT_PIN;
+
+    if (argumentPIN != NULL) {
+        PIN = atoi(argumentPIN);
+    }
+
+    /* Now set the values of "argc" and "argv" to the values after the
+       options have been processed, above. */
+    argc -= optind;
+
+    if (argc == 0) {
+        printUsage(argv);
+        return EXIT_FAILURE;
+    }
+
+    argv += optind;
+
+    // Parse the first parameter to this command as an integer
+    int code = atoi(argv[0]);
+
+    if (wiringPiSetup () == -1) {
+        return EXIT_FAILURE;
+    }
+
+    RCSwitch mySwitch = RCSwitch();
+
+    // Pulse length depends on the RF outlets you are using. Use RFSniffer to see what pulse length your device uses.
+    if (argumentPulseLength != NULL) {
+        int pulseLength = atoi(argumentPulseLength);
+        mySwitch.setPulseLength(pulseLength);
+        printf("Sending Code: %i. PIN: %i. Pulse Length: %i\n", code, PIN, pulseLength);    
+    } else {
+        printf("Sending Code: %i. PIN: %i.", code, PIN);    
+    }
+
+    mySwitch.enableTransmit(PIN);
     mySwitch.send(code, 24);
-
-	return 0;
 
+    return EXIT_SUCCESS;
 }