SPINDLE/LASER pins changes

Marlin/pins_BRAINWAVE.h

@@ -27,6 +27,40 @@
  * https://github.com/unrepentantgeek/brainwave-arduino
  */
 
+/**
+ *  Rev B  16 JAN 2017
+ *
+ *  Added pointer to a currently available Arduino IDE extension that will
+ *  allow this board to use the latest Marlin software
+ */
+
+/**
+ *  Marlin_AT90USB - https://github.com/Bob-the-Kuhn/Marlin_AT90USB
+ *    This is the only known IDE extension that is compatible with the pin definitions
+ *    in this file, Adrduino 1.6.12 and the latest mainstream Marlin software.
+ *
+ *    "Marlin_AT90USB" makes PWM0A available rather than the usual PWM1C. These PWMs share
+ *    the same physical pin. Marlin uses TIMER1 to generate interrupts and sets it up such
+ *    that PWM1A, PWM1B & PWM1C can not be used.
+ *
+ *  Installation:
+ *
+ *    1. In the Arduino IDE, under Files -> Preferences paste the following URL
+ *       https://rawgit.com/Bob-the-Kuhn/Marlin_AT90USB/master/package_MARLIN_AT90USB_index.json
+ *    2. Under Tools -> Board -> Boards manager, scroll to the bottom, click on MARLIN_AT90USB
+ *       and then click on "Install"
+ *    3. Select "AT90USB646_STANDARD" from the 'Tools -> Boards' menu.
+ */
+
+/**
+ *  To burn the bootloader that comes with Marlin_AT90USB:
+ *
+ *    1. Connect your programmer to the board.
+ *    2. In Arduino IDE select "AT90USB646_STANDARD" and then select the programmer.
+ *    3. In Arduino IDE click on "burn bootloader". Don't worry about the "verify failed at 1F000" error message.
+ *    4. The programmer is no longer needed. Remove it.
+ */
+
 #ifndef __AVR_AT90USB646__
   #error "Oops!  Make sure you have 'Brainwave' selected from the 'Tools -> Boards' menu."
 #endif