/** \file * * This file contains special DoxyGen information for the generation of the main page and other special * documentation pages. It is not a project source file. */ /** \mainpage AVRISP MKII Programmer Project * * \section SSec_Compat Project Compatibility: * * 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 (8KB versions with reduced features only) * * \section SSec_Info USB Information: * * The following table gives a rundown of the USB utilization of this project. * * <table> * <tr> * <td><b>USB Mode:</b></td> * <td>Device</td> * </tr> * <tr> * <td><b>USB Class:</b></td> * <td>Vendor Specific Class</td> * </tr> * <tr> * <td><b>USB Subclass:</b></td> * <td>N/A</td> * </tr> * <tr> * <td><b>Relevant Standards:</b></td> * <td>Atmel AVRISP MKII Protocol Specification</td> * </tr> * <tr> * <td><b>Usable Speeds:</b></td> * <td>Full Speed Mode</td> * </tr> * </table> * * \section SSec_Description Project Description: * * Firmware for an AVRStudio 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 AVRStudio. In its * most basic form, it allows for the programming of 5V AVRs from within 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. * * 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 AVRStudio. * * Note that this design currently has the following limitations: * - Minimum ISP target clock speed of 500KHz due to hardware SPI module prescaler limitations * - No reversed/shorted target connector detection and notification * - A seperate 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 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 5V level at all times. * * 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. * * \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> * </tr> * <tr> * <td>MISO</td> * <td>PDO</td> * <td>1</td> * </tr> * <tr> * <td>ADCx <b><sup>1</sup></b></td> * <td>VTARGET</td> * <td>2</td> * </tr> * <tr> * <td>SCLK</td> * <td>SCLK</td> * <td>3</td> * </tr> * <tr> * <td>MOSI</td> * <td>PDI</td> * <td>4</td> * </tr> * <tr> * <td>PORTx.y <b><sup>2</sup></b></td> * <td>/RESET</td> * <td>5</td> * </tr> * <tr> * <td>GND</td> * <td>GND</td> * <td>6</td> * </tr> * </table> * * In addition, the AVR's XCK pin will generate a .5MHz clock when SPI programming is used, to act as an external * device clock if the fuses have been mis-set. To use the recovery clock, connect XCK to the target AVR's XTAL1 * pin, and set the ISP programming speed to 125KHz or below. * * <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 AUX line related tokens in the \ref SSec_Options section</i> * * \section Sec_PDI PDI Connections * Connections to the device for PDI programming (when enabled): * * <table> * <tr> * <td><b>Programmer Pin:</b></td> * <td><b>Target Device Pin:</b></td> * <td><b>PDI 6 Pin Layout:</b></td> * </tr> * <tr> * <td>Tx/Rx <b><sup>2</sup></b></td> * <td>DATA</td> * <td>1</td> * </tr> * <tr> * <td>ADCx <b><sup>1</sup></b></td> * <td>VTARGET</td> * <td>2</td> * </tr> * <tr> * <td>N/A</td> * <td>N/A</td> * <td>3</td> * </tr> * <tr> * <td>N/A</td> * <td>N/A</td> * <td>4</td> * </tr> * <tr> * <td>XCK</td> * <td>CLOCK</td> * <td>5</td> * </tr> * <tr> * <td>GND</td> * <td>GND</td> * <td>6</td> * </tr> * </table> * * <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>The AVR's Tx and Rx become the DATA line when connected together via a pair of 220 ohm resistors</i> \n * * \section Sec_TPI TPI Connections * Connections to the device for TPI programming (when enabled): * * <table> * <tr> * <td><b>Programmer Pin:</b></td> * <td><b>Target Device Pin:</b></td> * <td><b>TPI 6 Pin Layout:</b></td> * </tr> * <tr> * <td>Tx/Rx <b><sup>2</sup></b></td> * <td>DATA</td> * <td>1</td> * </tr> * <tr> * <td>ADCx <b><sup>1</sup></b></td> * <td>VTARGET</td> * <td>2</td> * </tr> * <tr> * <td>XCK <b><sup>2</sup></b></td> * <td>CLOCK</td> * <td>3</td> * </tr> * <tr> * <td>N/A</td> * <td>N/A</td> * <td>4</td> * </tr> * <tr> * <td>PORTx.y <b><sup>3</sup></b></td> * <td>/RESET</td> * <td>5</td> * </tr> * <tr> * <td>GND</td> * <td>GND</td> * <td>6</td> * </tr> * </table> * * <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>The AVR's Tx and Rx become the DATA line when connected together via a pair of 220 ohm resistors</i> \n * <b><sup>3</sup></b> <i>See AUX line related tokens in the \ref SSec_Options section</i> * * \section SSec_Options Project Options * * The following defines can be found in this project, which can control the project behaviour when defined, or changed in value. * * <table> * <tr> * <td><b>Define Name:</b></td> * <td><b>Location:</b></td> * <td><b>Description:</b></td> * </tr> * <tr> * <td>AUX_LINE_PORT</td> * <td>Makefile LUFA_OPTS</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. <i>Ignored when compiled for the XPLAIN board.</i></td> * </tr> * <tr> * <td>AUX_LINE_PIN</td> * <td>Makefile LUFA_OPTS</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. <i>Ignored when compiled for the XPLAIN board.</i></td> * </tr> * <tr> * <td>AUX_LINE_DDR</td> * <td>Makefile LUFA_OPTS</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. <i>Ignored when compiled for the XPLAIN board.</i></td> * </tr> * <tr> * <td>AUX_LINE_MASK</td> * <td>Makefile LUFA_OPTS</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>. <i>Ignored when * compiled for the XPLAIN board.</i></td> * </tr> * <tr> * <td>VTARGET_ADC_CHANNEL</td> * <td>Makefile LUFA_OPTS</td> * <td>ADC channel number (on supported AVRs) to use for VTARGET level detection, if NO_VTARGET_DETECT is not defined. * <i>Ignored when compiled for targets lacking an ADC.</i></td> * </tr> * <tr> * <td>ENABLE_ISP_PROTOCOL</td> * <td>Makefile LUFA_OPTS</td> * <td>Define to enable SPI programming protocol support. <i>Ignored when compiled for the XPLAIN board.</i></td> * </tr> * <tr> * <td>ENABLE_XPROG_PROTOCOL</td> * <td>Makefile LUFA_OPTS</td> * <td>Define to enable PDI and TPI programming protocol support. <i>Ignored when compiled for the XPLAIN board.</i></td> * </tr> * <tr> * <td>NO_VTARGET_DETECT</td> * <td>Makefile LUFA_OPTS</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 5V target voltage to the host regardless of the real target voltage. <i>Ignored when compiled for * targets lacking an ADC.</i></td> * </tr> * <tr> * <td>VTARGET_REF_VOLTS</td> * <td>Makefile LUFA_OPTS</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. <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>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 * to 2. <i>Ignored when compiled for targets lacking an ADC, or when NO_VTARGET_DETECT is defined.</i></td> * </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. * </tr> * </table> */