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MBHP_USB_GM EEPROM programmer =============================================================================== Copyright (C) 2008 Thorsten Klose (firstname.lastname@example.org) Licensed for personal non-commercial use only. All other rights reserved. =============================================================================== A precompiled binary is already part of this package: o project.hex (can be loaded into MIOS Studio) Following tools are required to recompile the code: o SDCC o gputils The details are described under http://www.midibox.org/dokuwiki/application_development =============================================================================== Required hardware: o one MBHP_CORE module o 8 pin socket connected to J4 (same pinning as BankStick with CS#0 - pin 1/2/3 of IIC EEPROM connected to ground) Optional hardware: o LCD to output status message =============================================================================== This application allows to program the optional IIC EEPROM for MBHP_USB_GM5 with customized USB descriptors. Adaptions have to be done in eeprom_content.c (e.g. changing number of MIDI interfaces, changing device name, changing PID/VID, etc...) The EEPROM structure has been provided by Ploytec, the USB descriptors are taken from the MBHP_USB_PIC project Note that only IIC EEPROMs with 8bit addressing can be used (e.g. 24C04) Programming will be performed ca. 5 seconds after startup. A status code will be displayed if a LCD is connected: 0x00: no error 0x01: verify error 0x02: no EEPROM connected 0x40: interface descriptor at wrong position 0x41: endpoint descriptor not found The status code will also be sent as Program Change message via MIDI (useful if no LCD connected) =============================================================================== Important note: due to an imperfection in the current GM5 firmware, only the lower 256 byte bank of the 2kbyte EEPROM can be accessed. If more than 3 MIDI interfaces are defined, the descriptors will exceed the 256 byte boundary and the device won't enumerate correctly. This means in other words: currently, all 5 IOs can only be used with the original descriptors which are stored in GM5 (-> remove EEPROM, set J1..J3 jumpers accordingly) ===============================================================================