/** \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 Sec_Compat Project Compatibility: * * The following list indicates what microcontrollers are compatible with this project. * * - Series 7 USB AVRs (AT90USBxxx7) * - Series 6 USB AVRs (AT90USBxxx6) * - Series 4 USB AVRs (ATMEGAxxU4) * - Series 2 USB AVRs (AT90USBxx2, ATMEGAxxU2) - 8KB versions with reduced features only * * \section Sec_Info USB Information: * * The following table gives a rundown of the USB utilization of this project. * * * * * * * * * * * * * * * * * * * * * * *
USB Mode:Device
USB Class:Vendor Specific Class
USB Subclass:N/A
Relevant Standards:Atmel AVRISP MKII Protocol Specification
Usable Speeds:Full Speed Mode
* * \section Sec_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: * - 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 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): * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Programmer Pin:Target Device Pin:ISP 6 Pin Layout:
MISOPDO1
ADCx 1VTARGET2
SCLKSCLK3
MOSIPDI4
PORTx.y 2/RESET5
GNDGND6
* * In addition, the AVR's OCR1A pin will generate a 4MHz clock, to act as an external rescue device clock if the * fuses have been mis-set. To use the recovery clock, connect the OCR1A pin of the USB AVR to the target AVR's * XTAL1 pin, and set the ISP programming speed to 125KHz (note: other ISP speeds will not work correctly). * * 1 Optional, see \ref Sec_Options section - for USB AVRs with ADC modules only \n * 2 See AUX line related tokens in the \ref Sec_Options section * * \section Sec_PDI PDI Connections * Connections to the device for PDI programming (when enabled): * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Programmer Pin:Target Device Pin:PDI 6 Pin Layout:
Tx/Rx 2DATA1
ADCx 1VTARGET2
N/AN/A3
N/AN/A4
XCKCLOCK5
GNDGND6
* * 1 Optional, see \ref Sec_Options section - for USB AVRs with ADC modules only \n * 2 The AVR's Tx and Rx become the DATA line when connected together via a pair of 220 ohm resistors \n * * \section Sec_TPI TPI Connections * Connections to the device for TPI programming (when enabled): * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Programmer Pin:Target Device Pin:TPI 6 Pin Layout:
Tx/Rx 2DATA1
ADCx 1VTARGET2
XCK 2CLOCK3
N/AN/A4
PORTx.y 3/RESET5
GNDGND6
* * 1 Optional, see \ref Sec_Options section - for USB AVRs with ADC modules only \n * 2 The AVR's Tx and Rx become the DATA line when connected together via a pair of 220 ohm resistors \n * 3 See AUX line related tokens in the \ref Sec_Options section * * \section Sec_Options Project Options * * The following defines can be found in this project, which can control the project behaviour when defined, or changed in value. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
Define Name:Location:Description:
AUX_LINE_PORTMakefile LUFA_OPTSPORT 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. Ignored when compiled for the XPLAIN board.
AUX_LINE_PINMakefile LUFA_OPTSPIN 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. Ignored when compiled for the XPLAIN board.
AUX_LINE_DDRMakefile LUFA_OPTSDDR 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. Ignored when compiled for the XPLAIN board.
AUX_LINE_MASKMakefile LUFA_OPTSMask 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. Must not be the AVR's /SS pin. Ignored when * compiled for the XPLAIN board.
VTARGET_ADC_CHANNELMakefile LUFA_OPTSADC channel number (on supported AVRs) to use for VTARGET level detection, if NO_VTARGET_DETECT is not defined. * Ignored when compiled for targets lacking an ADC.
ENABLE_ISP_PROTOCOLMakefile LUFA_OPTSDefine to enable SPI programming protocol support. Ignored when compiled for the XPLAIN board.
ENABLE_XPROG_PROTOCOLMakefile LUFA_OPTSDefine to enable PDI and TPI programming protocol support. Ignored when compiled for the XPLAIN board.
NO_VTARGET_DETECTMakefile LUFA_OPTSDefine 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. Ignored when compiled for * targets lacking an ADC.
VTARGET_REF_VOLTSMakefile LUFA_OPTSIndicates 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. Ignored when compiled for targets lacking an ADC, or when NO_VTARGET_DETECT is defined.
VTARGET_USE_INTERNAL_REFMakefile LUFA_OPTSSelects 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.
VTARGET_SCALE_FACTORMakefile LUFA_OPTSIndicates 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. Ignored when compiled for targets lacking an ADC, or when NO_VTARGET_DETECT is defined.
LIBUSB_DRIVER_COMPATMakefile LUFA_OPTSDefine 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. *
XCK_RESCUE_CLOCK_ENABLEMakefile LUFA_OPTSDefine 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 *may* cause some issues with PDI programming mode. *
*/