Subject: Re: FT232R DMX512
On 10/26/2010 07:51 PM, Rui Barreiros wrote:
> * Loop start
> - ftdi_poll_modem_status
> - if we got a break
> - read startbyte (1 byte)
> - read dmxvalues (512 bytes)
> - ftdi_usb_purge_buffers
> * Loop end
> Now, the dmx values are read, but, in the wrong place and sometimes change
> places. The break detection is not working well, sometimes it's detected
> other times it isn't, so the update is slow as hell for a 250k baud and I'm
> almost sure that due to the break issue the values come in a wrong order.
> I could use FTDI own driver, I have an example using Win32 API that works
> (all those FT_W320_* functions) but I can't make this work with libftdi, and
> I'd rather use libftdi instead of FTDI own lib.
> Anyone has any idea or pointer to enlighten me over what I might be doing
> wrong ?
I'm not sure if the ftdi_poll_modem_status() function
gives you access to all sent break signals. Look
into ftdi_read_data(), it filters out the modem status
on every packet border IIRC.
libftdi - see http://www.intra2net.com/en/developer/libftdi for details.
To unsubscribe send a mail to libftdi+unsubscribe@xxxxxxxxxxxxxxxxxxxxxxx