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