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====== MIDIbox FM V2.1 ====== See [[http://midibox.org/forums/topic/19073-midibox-fm-v21-on-stm32f4/]] and [[http://midibox.org/forums/topic/18282-midibox-fm-v20-on-lpc17/]] This is a synth by Sauraen constructed in 2014-2015. It's as finished as it ever will be, but it was never documented for others to try to replicate... until now! Please note that this is still not a complete, well-documented project, and certainly not for beginners. I do not guarantee that all the information you will need is available here. Please comment on the MIDIbox FM V2.1 thread to ask for more information when necessary. ====== Connection of OPL3 module to STM32F4 core ====== (Information from [[http://svnmios.midibox.org/filedetails.php?repname=svn.mios32&path=%2Ftrunk%2Fmodules%2Fopl3%2FReadme.txt]]) The OPL3's Reset line must be buffered to 5 volts; all the other inputs may be driven by 3.3 volts. Pinout: * OPL3 D7:0 -> PE15:8 (J10A D7:0) * OPL3 A1:0 -> PE7:6 (J10B D15:14) * OPL3 RS (#IC) -> PB8 (J19:RC2) * First OPL3 WR (#CS, #WR) -> PE5 (J10B D13) * Second OPL3 WR (#CS, #WR) -> PE4 (J10B D12) The pins used for RS and the two CS pins may be changed by defining the appropriate things in your mios32_config.h file. See the README from the OPL3 module above. (Or just use the MIDIbox FM V2.1 code and hook the wires up as shown here.)
