I've browsed the maillist but can't seem to locate infomation about
this issue really.
I got a TTL-RS232R-5V cable, and was going use it to replicate the
signal states at one location, to another one at a different location.
I'm having an issue getting the baudrates in sync between the two of
them (in the tests I'm only using the same one, run it in read mode,
store the output, then replay recorded data back).
I have found if I set the baudrate after I switch into bitbanging
mode, it seems to have no effect. If I switch it before, it sets the
baud rate to 8x what I set it to, but if it goes up around 500kbit or
higher baud, it gets inconsistant.
Using the baud_test sample program, in serial mode it's accurate, in
async mode (-m a), it gives:
./libftdi-0.18/examples/baud_test -m a
real baudrate used: 9600
this test should take 10.42 seconds
and took 42.5663 seconds, this is 2349 baud or factor 0.245
Tests using my program, and setting the baudrate before switching into
bitbang mode show, for reading:
Took 34.0593, approx baud of 154017, set baud 19200, data size 5245696
and for writing baud*2, found using baudrates >57600 needed baud*4:
Took 34.7484, approx baud of 150962, set baud 38400, data size 5245696
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