Elaborate configuration of which pins to use: support HOODLOADER2 and old Uno style wiring.

Author: Peter Van Hoyweghen

examples/11.ArduinoISP/ArduinoISP/ArduinoISP.ino

@@ -46,12 +46,7 @@
 #include "Arduino.h"
 #undef SERIAL
 
-// Use pin 10 to reset the target
-#define RESET     10
 
-#define LED_HB    9
-#define LED_ERR   8
-#define LED_PMODE 7
 #define PROG_FLICKER true
 
 // Configure SPI clock.
@@ -75,6 +70,44 @@
 
 #endif
 
+// Configure which pins to use
+
+// The standard pin configuration.
+#ifndef ARDUINO_HOODLOADER2 
+
+#define RESET     10 // Use pin 10 to reset the target rather than SS
+#define LED_HB    9
+#define LED_ERR   8
+#define LED_PMODE 7
+
+// Uncomment following line to use the old uno style wiring
+// (using pin 11, 12 and 13 instead of the SPI header) on Leonardo, Due...
+
+// #define USE_OLD_STYLE_WIRING
+
+#ifdef USE_OLD_STYLE_WIRING
+#undef USE_HARDWARE_SPI
+#undef MOSI
+#undef MISO
+#undef SCK
+#define MOSI	11
+#define MISO	12
+#define SCK	13
+#endif
+
+// HOODLOADER2 means running sketches on the atmega16u2 
+// serial converter chips on Uno or Mega boards.
+// We must use pins that are broken out:
+#else 
+
+#define RESET     4
+#define LED_HB    7
+#define LED_ERR   6
+#define LED_PMODE 5
+
+#endif
+
+
 // Configure the serial port to use.
 //
 // Prefer the USB virtual serial port (aka. native USB port), if the Arduino has one: