Jason: You are pulling a line to ground, which is a 2.7K resistor to internal +3.3V.
So, if your GPIO line can pull 1.2 mA to ground and keep it a logic 'low' then the GPIO line should work directly. Make sure your ground systems are tied together. Make sure you understand what the system will do if you have power on the radio, and no power on the Linux board. (It might turn the radio on.) --- Graham == On Mon, Aug 15, 2016 at 10:59 AM, Jason Cooper <flexra...@lakedaemon.net> wrote: > All, > > We recently installed my Dad's 6500 in my rack. He's able to remote in > fine using openvpn bridging. After fixing packet de-fragmentation > timeouts (good job, Windows. :-/), we're now working on remotely > turning the radio on and off. > > I have an RPC that can control the AC to the power supply, but that seems > a little harsh. > > So, I have an embedded Linux board (Openblocks A6) that sports 8 gpios > on an external IDC header. I can control the gpios from userspace, > which means I can give my Dad a simple ssh script to run to turn the > radio on and off. My problem is: > > echo 28 >/sys/class/gpio/enable > echo low >/sys/class/gpio/gpio28/direction > > *magic happens* > > Flex remote ON toggled. > > > I've looked all over, and it's not clear in the docs. Does the remote > on RCA connector need the pin shorted to ground (I need to sink > current)? Or, does it need the RCA pin dropped to 0v wrt the RCA > ground? > > If it's the former, I need to build a circuit. If the latter, I > *should* be able to wire the GPIO up to the RCA pin. > > Do I need to build a circuit? > > thx, > > Jason. > > _______________________________________________ > FlexRadio Systems Mailing List > FlexRadio@flex-radio.biz > To opt out of the Reflector: > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz To opt out of the Reflector: http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
