Hi,
I have been studying Roland XV-5050 managing through USB port few days
now, and been able to send "Set" commands with snd_rawmidi_write to
Roland USB module. But when trying to read e.g. Performance/Patch name
from the module with snd_rawmidi_read, I do not get any information from
the module.
What I do when querying information from module:
1. Sending "get" sequence with snd_rawmidi_write(rawmidi_handle_out,
&uchar, 1) to USB module
2. Then immediatelly snd_rawmidi_read(rawmidi_handle_in, &uchar, 1) to
read the USB module.
Normally this only hangs the test sw, but if snd_rawmidi_open with
define (0x0002 = not to wait for response), the read only gives int
value 247 for a response.
I think I have some serious problem with this because I simply do not
get the idea how to use read/write :) Anybody has any ideas what should
I try next, or anybody has any example code for this kind of problem.
Thanks,
-Mika
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