[Voyage-linux] Alix 3D3 and using RTS/DTR signals on RS-232

[Michael Steinmann]

yes, this means for sure there is no RTS/DTR on alix boards.

Michael

2012/7/1 Rajarajan Rajamani <r.rajamani at gmail.com>:
> I am trying to use an X10 home automation dongle (C17a, also known as
> firecracker) on the serial port. This device is driven via the RTS/DTR
> pins on the RS232. I have been using this dongle for many years on a
> FreeBSD box and wanted to use it on the 3D3 but could not make it work
> using both Voyage Linux and NanoBSD. There no errors reported and the
> sequence of ioctl system calls (using strace/truss) are the same
> between the working system I have (on a desktop running FreeBSD) and
> the Alix 3D3 (with both Linux/FreeBSD)
>
> Later on going over all the details of the serial protocol/pins, I
> noticed that in the data sheet for the 3D3 it says that due to
> limitations of the AMD CS5536 companion chip, only RXD / TXD are
> available for software and handshake signals cannot be observed or
> controlled.
>
> Further it shows the RTS/DTS pins to be always active.
>
> Does this mean (for sure) that I cannot use the pins to talk to the
> CM17A device ?? Is there any workaround for this - which I doubt.
>
> Any hints would be appreciated.
>
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