Change over AVRISP project to have both hardware USART and software USART modes for...

[pub/lufa.git] / Projects / AVRISP / AVRISP.txt

diff --git a/Projects/AVRISP/AVRISP.txt b/Projects/AVRISP/AVRISP.txt
index c15c27f..9dd2f11 100644 (file)
--- a/Projects/AVRISP/AVRISP.txt
+++ b/Projects/AVRISP/AVRISP.txt
@@ -109,7 +109,7 @@
  *  <b><sup>2</sup></b> <i>See \ref SSec_Options section</i>\r
  *\r
  *\r
- *  Connections to the device for PDI programming (when enabled):\r
+ *  Connections to the device for PDI programming<b><sup>1</sup></b> (when enabled):\r
  *\r
  *  <table>\r
  *   <tr>\r
@@ -149,6 +149,9 @@
  *   </tr>\r
  *  </table>\r
  *\r
+ *  <b><sup>1</sup></b> When PDI_VIA_HARDWARE_USART is set, the AVR's Tx and Rx become the DATA line when connected together\r
+ *                      via a pair of 300 ohm resistors, and the AVR's XCK pin becomes CLOCK.\r
+ *\r
  *  \section SSec_Options Project Options\r
  *\r
  *  The following defines can be found in this demo, which can control the demo behaviour when defined, or changed in value.\r
@@ -192,5 +195,11 @@
  *    <td>Makefile CDEFS</td>\r
  *    <td>Define to enable XMEGA PDI programming protocol support. <i>Ignored when compiled for the XPLAIN board.</i></td>  \r
  *   </tr>\r
+ *   <tr>\r
+ *    <td>PDI_VIA_HARDWARE_USART</td>\r
+ *    <td>Makefile CDEFS</td>\r
+ *    <td>Define to force the PDI protocol (when enabled) to use the hardware USART instead of bit-banging to match the official\r
+ *        AVRISP pinout. <i>Automatically set when compiled for the XPLAIN board.</i></td>  \r
+ *   </tr>\r
  *  </table>\r
  */\r