/** \mainpage AVRISP MKII Programmer Project
*
- * \section Sec_Compat Project Compatibility:
+ * \section Sec_Compat Project Compatibility
*
* The following list indicates what microcontrollers are compatible with this project.
*
* \li Series 4 USB AVRs (ATMEGAxxU4)
* \li Series 2 USB AVRs (AT90USBxx2, ATMEGAxxU2) - <i>8KB versions with reduced features only</i>
*
- * \section Sec_Info USB Information:
+ * \section Sec_Info USB Information
*
* The following table gives a rundown of the USB utilization of this project.
*
* </tr>
* </table>
*
- * \section Sec_Description Project Description:
+ * \section Sec_Description Project Description
*
- * Firmware for an Atmel Studio/AVRStudio compatible AVRISP-MKII clone programmer. This project will enable the USB
+ * Firmware for an Atmel Studio/AVR Studio compatible AVRISP-MKII clone programmer. This project will enable the USB
* AVR series of microcontrollers to act as a clone of the official Atmel AVRISP-MKII programmer, usable within
- * Atmel Studio/AVRStudio or with any software capable of driving a real Atmel AVRISP-MKII programmer. In its most
- * basic form, it allows for the programming of AVRs at the programmer's VCC voltage from within Atmel Studio/AVRStudio
- * with no special hardware other than the USB AVR and the parts needed for the USB interface. If the user desires, more
- * advanced circuits incorporating level conversion can be made to allow for the programming of 3.3V AVR designs.
+ * Atmel Studio/AVR Studio or with any software capable of driving a real Atmel AVRISP-MKII programmer. In its most
+ * basic form, it allows for the programming of AVR TINY, MEGA and XMEGA devices aat the programmer's VCC voltage from
+ * within Atmel Studio/AVR Studio with no special hardware other than the USB AVR and the parts needed for the USB
+ * interface. If the user desires, more advanced circuits incorporating level conversion can be made to allow for the
+ * programming of target AVRs running at a different voltage to the programmer.
*
* This device spoofs Atmel's official AVRISP-MKII device PID so that it remains compatible with Atmel's AVRISP-MKII
- * drivers. When prompted, direct your OS to install Atmel's AVRISP-MKII drivers provided with Atmel Studio/AVRStudio.
+ * drivers. When prompted, direct your OS to install Atmel's AVRISP-MKII drivers provided with Atmel Studio/AVR Studio.
*
* Note that this design currently has the following limitations:
* - No reversed/shorted target connector detection and notification
* - A separate header is required for each of the ISP, PDI and TPI programming protocols that the user wishes to use
*
- * On AVR models with an ADC converter, AVCC should be tied to 5V (e.g. VBUS) and the \c VTARGET_ADC_CHANNEL token should be
- * set to an appropriate ADC channel number in the project makefile for VTARGET detection to operate correctly. On models
- * without an ADC converter, VTARGET will report a fixed 3.3V level at all times.
+ * On AVR models with an ADC converter, the USB AVR's AVCC pin should be tied to 5V (e.g. VBUS) and the
+ * \c VTARGET_ADC_CHANNEL token should be set to an appropriate ADC channel number in the project makefile for VTARGET
+ * detection to operate correctly. On models without an ADC converter, VTARGET will report a fixed 3.3V level at all times
+ * which should allow the programmer to remain compatible at the protocol level with all AVR devices.
*
* 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, ISP or PDI/TPI programming support can be disabled to reduce program size.
+ * of FLASH is required. On 8KB devices, ISP or PDI/TPI protocol programming support can be disabled to reduce program size.
+ *
+ * \section Sec_KnownIssues Known Issues:
+ *
+ * \par Incompatible with newer AVRDUDE releases.
+ * Due to <a href="http://savannah.nongnu.org/bugs/index.php?40831">a change in 6.0.1 and never AVRDUDE releases</a>,
+ * these builds are incompatible with the AVRISP-MKII clone project. Use an older 5.x release until AVRDUDE is patched.
+ *
+ * \par XMEGA EEPROM programming fails in some cases.
+ * Several users have reported that XMEGA EEPROM programming fails unless the chip is erased first. If a non-blank EEPROM
+ * is present, writing further EEPROM data causes corruption.
+ * <a href="https://github.com/abcminiuser/lufa/issues/25">LUFA issue tracker entry</a>.
+ *
+ * \par Does not work with Atmel Studio 6.2 or newer in some cases.
+ * If the libUSB filter driver is used to bind both libUSB and Jungo drivers to the clone device at the same time, it will
+ * no longer work in Atmel Studio 6.2 and newer. This is due to a change in the latter; Atmel Studio now supports both
+ * drivers for various tools, but while the libUSB driver is given preference the inner workings of Atmel Studio cannot
+ * communicate with the AVR-ISP MKII with libUSB (this is true for the genuine tool also). Uninstall the filter driver and
+ * install only the standard libUSB driver, or Jungo driver. The \c RESET_TOGGLES_LIBUSB_COMPAT compile option (detailed
+ * below) is a suitable workaround to this issue.
+ *
+ * \section Sec_Installation Installation
+ * The programmer supports multiple platforms, both Windows and Linux.
+ *
+ * \subsection SSec_LinuxInstallation Linux Installation
+ * On Linux systems, the programmer should be usable out of the box with no special setup other than (on some systems)
+ * editing of the system permissions to allow the programmer to be used from a non-elevated (root) context. The programmer
+ * is compatible with the free open source AVRDude programming software project.
+ *
+ * \subsection SSec_WindowsInstallation Windows Installation
+ * On Windows systems, due to an unfortunate limitation of the USB AVR devices and the driver used in the official AVR
+ * Studio/Atmel Studio platform, the programmer cannot be made compatible with AVRDude and AVR Studio/Atmel Studio at the
+ * same time. Instead, the programmer will be compatible with the official Atmel software by default, with a recompilation
+ * with the \c LIBUSB_DRIVER_COMPAT token (see \ref Sec_Options) being required to use the alternative libUSB driver
+ * compatibility mode that will allow the programmer to work under AVRDude on Windows.
+ *
+ * If compiled for Atmel Studio/AVR Studio compatibility, install the Jungo device drivers that ship with the Atmel software.
+ * If compiled in the alternative libUSB compatibility mode for AVRDude use, install the libUSB drivers that are included
+ * with your compiled copy of AVRDude, or create them using the libUSB-Win32 (http://sourceforge.net/projects/libusb-win32)
+ * project.
+ *
+ * For convenience, the programmer will report two different serial numbers depending on the firmware compatibility mode, so
+ * that the correct driver can be installed for the matching firmware. If the \c RESET_TOGGLES_LIBUSB_COMPAT compile option
+ * is used (see \ref Sec_Options) this allows for an easy way to automatically switch device drivers along with the firmware
+ * compatibility mode. The serials are:
+ *
+ * <table>
+ * <tr>
+ * <th><b>Serial Number:</b></th>
+ * <th><b>Compatibility Mode:</b></th>
+ * </tr>
+ * <tr>
+ * <td>000200012345</td>
+ * <td>Jungo (Atmel Studio) Compatibility</td>
+ * </tr>
+ * <tr>
+ * <td>000200112345</td>
+ * <td>libUSB Compatibility</td>
+ * </tr>
+ * </table>
*
* \section Sec_ISP ISP Connections
* Connections to the device for SPI programming (when enabled):
*
* <table>
* <tr>
- * <td><b>Programmer Pin:</b></td>
- * <td><b>Target Device Pin:</b></td>
- * <td><b>ISP 6 Pin Layout:</b></td>
+ * <th><b>Programmer Pin:</b></th>
+ * <th><b>Target Device Pin:</b></th>
+ * <th><b>ISP 6 Pin Layout:</b></th>
* </tr>
* <tr>
* <td>MISO</td>
*
* <table>
* <tr>
- * <td><b>Programmer Pin:</b></td>
- * <td><b>Target Device Pin:</b></td>
- * <td><b>PDI 6 Pin Layout:</b></td>
+ * <th><b>Programmer Pin:</b></th>
+ * <th><b>Target Device Pin:</b></th>
+ * <th><b>PDI 6 Pin Layout:</b></th>
* </tr>
* <tr>
* <td>Tx/Rx <b><sup>2</sup></b></td>
*
* <table>
* <tr>
- * <td><b>Programmer Pin:</b></td>
- * <td><b>Target Device Pin:</b></td>
- * <td><b>TPI 6 Pin Layout:</b></td>
+ * <th><b>Programmer Pin:</b></th>
+ * <th><b>Target Device Pin:</b></th>
+ * <th><b>TPI 6 Pin Layout:</b></th>
* </tr>
* <tr>
* <td>Tx/Rx <b><sup>2</sup></b></td>
*
* <table>
* <tr>
- * <td><b>Define Name:</b></td>
- * <td><b>Location:</b></td>
- * <td><b>Description:</b></td>
+ * <th><b>Define Name:</b></th>
+ * <th><b>Location:</b></th>
+ * <th><b>Description:</b></th>
* </tr>
* <tr>
* <td>AUX_LINE_PORT</td>
- * <td>Makefile LUFA_OPTS</td>
+ * <td>AppConfig.h</td>
* <td>PORT register for the programmer's AUX target line. The use of this line varies between the programming protocols,
* but is generally used for the target's /RESET line.
* \n \n <i>Ignored when compiled for the XPLAIN board.</i></td>
* </tr>
* <tr>
* <td>AUX_LINE_PIN</td>
- * <td>Makefile LUFA_OPTS</td>
+ * <td>AppConfig.h</td>
* <td>PIN register for the programmer's AUX target line. The use of this line varies between the programming protocols,
* but is generally used for the target's /RESET line.
* \n \n <i>Ignored when compiled for the XPLAIN board.</i></td>
* </tr>
* <tr>
* <td>AUX_LINE_DDR</td>
- * <td>Makefile LUFA_OPTS</td>
+ * <td>AppConfig.h</td>
* <td>DDR register for the programmer's AUX target line. The use of this line varies between the programming protocols,
* but is generally used for the target's /RESET line.
* \n \n <i>Ignored when compiled for the XPLAIN board.</i></td>
* </tr>
* <tr>
* <td>AUX_LINE_MASK</td>
- * <td>Makefile LUFA_OPTS</td>
+ * <td>AppConfig.h</td>
* <td>Mask for the programmer's AUX target line. The use of this line varies between the programming protocols,
* but is generally used for the target's /RESET line. <b>Must not be the AVR's /SS pin</b>.
* \n \n <i>Ignored when compiled for the XPLAIN board.</i></td>
* </tr>
* <tr>
* <td>VTARGET_ADC_CHANNEL</td>
- * <td>Makefile LUFA_OPTS</td>
+ * <td>AppConfig.h</td>
* <td>ADC channel number (on supported AVRs) to use for VTARGET level detection, if NO_VTARGET_DETECT is not defined.
* \n \n <i>Ignored when compiled for targets lacking an ADC.</i></td>
* </tr>
* <tr>
* <td>ENABLE_ISP_PROTOCOL</td>
- * <td>Makefile LUFA_OPTS</td>
+ * <td>AppConfig.h</td>
* <td>Define to enable SPI programming protocol support.
* \n \n <i>Ignored when compiled for the XPLAIN board.</i></td>
* </tr>
* <tr>
* <td>ENABLE_XPROG_PROTOCOL</td>
- * <td>Makefile LUFA_OPTS</td>
+ * <td>AppConfig.h</td>
* <td>Define to enable PDI and TPI programming protocol support.
* \n \n <i>Ignored when compiled for the XPLAIN board.</i></td>
* </tr>
* <tr>
* <td>NO_VTARGET_DETECT</td>
- * <td>Makefile LUFA_OPTS</td>
+ * <td>AppConfig.h</td>
* <td>Define to disable VTARGET sampling and reporting on AVR models with an ADC converter. This will cause the programmer
- * to report a fixed 3.3V target voltage to the host regardless of the real target voltage.
+ * to report a fixed 3.3V target voltage to the host regardless of the real target voltage.
* \n \n <i>Ignored when compiled for targets lacking an ADC.</i></td>
* </tr>
* <tr>
* <td>VTARGET_REF_VOLTS</td>
- * <td>Makefile LUFA_OPTS</td>
+ * <td>AppConfig.h</td>
* <td>Indicates the programmer AVR's AVCC reference voltage when measuring the target's supply voltage. Note that the supply
* voltage should never exceed the reference voltage on the programmer AVR without some form of protection to prevent damage
* to the ADC.
* </tr>
* <tr>
* <td>VTARGET_USE_INTERNAL_REF</td>
- * <td>Makefile LUFA_OPTS</td>
+ * <td>AppConfig.h</td>
* <td>Selects the internal 2.56V ADC reference voltage, instead of using the AVR's VREF pin. When enabled, this option will
* override the VTARGET_REF_VOLTS configuration option.
* \n \n <i>Ignored when compiled for targets lacking an ADC, or when NO_VTARGET_DETECT is defined.</i></td>
* </tr>
* <tr>
* <td>VTARGET_SCALE_FACTOR</td>
- * <td>Makefile LUFA_OPTS</td>
+ * <td>AppConfig.h</td>
* <td>Indicates the target's supply voltage scale factor when applied to the ADC. A simple resistive divider can be used on the
* ADC pin for measuring the target's supply voltage, so that voltages above the programmer AVR's AVCC reference voltage can be
* measured. This should be the reciprocal of the division performed - e.g. if the VTARGET voltage is halved, this should be set
* </tr>
* <tr>
* <td>LIBUSB_DRIVER_COMPAT</td>
- * <td>Makefile LUFA_OPTS</td>
- * <td>Define to switch to a non-standard endpoint scheme, breaking compatibility with AVRStudio under Windows but making
- * the code compatible with software such as avrdude (all platforms) that use the libUSB driver.
+ * <td>AppConfig.h</td>
+ * <td>Define to switch to a non-standard endpoint scheme, breaking compatibility with Atmel Studio/AVR Studio under Windows but
+ * making the code compatible with software such as avrdude (all platforms) that use the libUSB driver.
*
* \note This option is incompatible with \c RESET_TOGGLES_LIBUSB_COMPAT.</td>
* </tr>
* <tr>
* <td>RESET_TOGGLES_LIBUSB_COMPAT</td>
- * <td>Makefile LUFA_OPTS</td>
+ * <td>AppConfig.h</td>
* <td>Define to make the /RESET line of the AVR toggle between Jungo and libUSB driver compatibility modes. Each time the AVR is
* reset externally via the reset pin, the compatibility mode will be toggled. The compatibility mode is preserved between
* power cycles and is not toggled via other forms of reset such as Watchdog or Brown Out.
*
+ * When this option is enabled, all board LEDs will flash twice on startup for Jungo compatibility mode, and five times for
+ * libUSB compatibility mode.
+ *
* \note This option is incompatible with \c LIBUSB_DRIVER_COMPAT.</td>
* </tr>
* <tr>
* <td>XCK_RESCUE_CLOCK_ENABLE</td>
- * <td>Makefile LUFA_OPTS</td>
+ * <td>AppConfig.h</td>
* <td>Define to move the ISP rescue clock to the AVR's XCK pin instead of the OCR1A output pin. This is useful for existing programming
* hardware that does not expose the OCR1A pin of the AVR, but <i>may</i> cause some issues with PDI programming mode.</td>
* </tr>
* <tr>
* <td>INVERTED_ISP_MISO</td>
- * <td>Makefile LUFA_OPTS</td>
+ * <td>AppConfig.h</td>
* <td>Define to invert the received data on the ISP MISO line. This is sometimes needed depending on the level translation hardware used,
* if the translator hardware inverts the received logic level.</td>
* </tr>
* <tr>
* <td>FIRMWARE_VERSION_MINOR</td>
- * <td>Makefile LUFA_OPTS</td>
+ * <td>AppConfig.h</td>
* <td>Define to set the minor firmware revision nunber reported to the host on request. By default this will use a firmware version compatible
* with the latest Atmel IDE version, however if desired the reported minor value can be adjusted here.</td>
* </tr>
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