X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/258a6a01777afadbf6913246f12a7106b421b795..24f730fce3f2022762011d795c3feada5ef874b3:/Projects/AVRISP/AVRISP.txt?ds=inline

diff --git a/Projects/AVRISP/AVRISP.txt b/Projects/AVRISP/AVRISP.txt
index c15c27fa6..35cf93770 100644
--- a/Projects/AVRISP/AVRISP.txt
+++ b/Projects/AVRISP/AVRISP.txt
@@ -6,18 +6,18 @@
  
 /** \mainpage AVRISP MKII Programmer Project
  *
- *  \section SSec_Compat Demo Compatibility:
+ *  \section SSec_Compat Project Compatibility:
  *
- *  The following list indicates what microcontrollers are compatible with this demo.
+ *  The following list indicates what microcontrollers are compatible with this project.
  *
  *  - Series 7 USB AVRs
  *  - Series 6 USB AVRs
  *  - Series 4 USB AVRs
- *  - Series 2 USB AVRs
+ *  - Series 2 USB AVRs (8KB versions with reduced features only)
  *
  *  \section SSec_Info USB Information:
  *
- *  The following table gives a rundown of the USB utilization of this demo.
+ *  The following table gives a rundown of the USB utilization of this project.
  *
  * <table>
  *  <tr>
@@ -51,7 +51,7 @@
  *  level conversion can be made to allow for the programming of 3.3V AVR designs.
  *
  *  This device spoofs Atmel's official AVRISP-MKII device PID so that it remains compatible with Atmel's AVRISP-MKII
- *  drivers. When promted, direct your OS to install Atmel's AVRISP-MKII drivers provided with AVRStudio.
+ *  drivers. When prompted, direct your OS to install Atmel's AVRISP-MKII drivers provided with AVRStudio.
  *
  *  Note that this design currently has several limitations:
  *    - Minimum ISP target clock speed of 500KHz due to hardware SPI used
@@ -62,9 +62,12 @@
  *  without an ADC converter, VTARGET will report at a fixed 5V level.
  *
  *  When compiled for the XPLAIN board target, this will automatically configure itself for the correct connections to the
- *  XPLAIN's XMEGA AVR, and will enable only PDI programming support.
+ *  XPLAIN's XMEGA AVR, and will enable PDI only programming support (since ISP mode is not needed).
  *
+ *  While this application can be compiled for USB AVRs with as little as 8KB of FLASH, for full functionality 16KB or more
+ *  of FLASH is required. On 8KB devices, either ISP or PDI programming support can be disabled to reduce program size.
  *
+ *  \section Sec_ISP ISP Connections
  *  Connections to the device for SPI programming (when enabled):
  *
  *  <table>
@@ -108,8 +111,8 @@
  *  <b><sup>1</sup></b> <i>Optional, see \ref SSec_Options section - for USB AVRs with ADC modules only</i> \n
  *  <b><sup>2</sup></b> <i>See \ref SSec_Options section</i>
  *
- *
- *  Connections to the device for PDI programming (when enabled):
+ *  \section Sec_PDI PDI Connections
+ *  Connections to the device for PDI programming<b><sup>1</sup></b> (when enabled):
  *
  *  <table>
  *   <tr>
@@ -149,9 +152,12 @@
  *   </tr>
  *  </table>
  *
+ *  <b><sup>1</sup></b> <i>When PDI_VIA_HARDWARE_USART is set, the AVR's Tx and Rx become the DATA line when connected together
+ *                         via a pair of 300 ohm resistors, and the AVR's XCK pin becomes CLOCK.</i>
+ *
  *  \section SSec_Options Project Options
  *
- *  The following defines can be found in this demo, which can control the demo behaviour when defined, or changed in value.
+ *  The following defines can be found in this project, which can control the project behaviour when defined, or changed in value.
  *
  *  <table>
  *   <tr>
@@ -165,6 +171,11 @@
  *    <td>PORT register for the programmer's target RESET line. <i>Ignored when compiled for the XPLAIN board.</i></td>
  *   </tr>
  *   <tr>
+ *    <td>RESET_LINE_PIN</td>
+ *    <td>Makefile CDEFS</td>
+ *    <td>PIN register for the programmer's target RESET line. <i>Ignored when compiled for the XPLAIN board.</i></td>
+ *   </tr>
+ *   <tr>
  *    <td>RESET_LINE_DDR</td>
  *    <td>Makefile CDEFS</td>
  *    <td>DDR register for the programmer's target RESET line. <i>Ignored when compiled for the XPLAIN board.</i></td>
@@ -192,5 +203,13 @@
  *    <td>Makefile CDEFS</td>
  *    <td>Define to enable XMEGA PDI programming protocol support. <i>Ignored when compiled for the XPLAIN board.</i></td>  
  *   </tr>
+ *   <tr>
+ *    <td>PDI_VIA_HARDWARE_USART</td>
+ *    <td>Makefile CDEFS</td>
+ *    <td>Define to force the PDI protocol (when enabled) to use the much faster hardware USART instead of bit-banging to
+ *        match the official AVRISP pinout. This breaks pinout compatibility with the official AVRISP MKII (and requires 
+ *        seperate ISP and PDI programming headers) but increases programming speed dramatically.
+ *        <i>Ignored when compiled for the XPLAIN board.</i></td>  
+ *   </tr>
  *  </table>
  */