Hi all,
the MIDI merger proposed by Thorsten is limited to 2 MIDI Ins. Is this limitation due to processing speed issues (reading: might be overcome by using a faster (18F452) processor), or is this due to hardware limitations?
Regards, ilmenator
Hi Ilmentator,
both: hardware limitations and processing speed. Every software implemented MIDI In requires a pin which can trigger an interrupt, and this interrupt must be processed within ca. 1-10 uS, otherwise the serial data could get lost if multiple MIDI transmitters are sending data at the same time. The PIC shouldn’t do anything else than listening to the ports. Therefore I would avoid more than one software implemented UART, this solution:
http://www.midibox.org/cgi-bin/yabb/YaBB.cgi?board=concepts;action=display;num=1046743910
is much better.
Best Regards, Thorsten.