Hi Phil, I did not know about the loanio option. So if I understand it well, after I export UART to FPGA, I can loanio all previously used pins from HPS to FPGA and connect it there. Than connect also missing "RTS/CTS" missing pins. If those missing pins are FPGA pins, just use them directly and if those missing pins are GPIO HPS pins as well, loanio them and connect them in FPGA right?
But what if this will not work? Is the only solution dig into driver? I am not very skilled in drivers development that's why I am asking :D Thanks a lot, It is much more clear to me now! BR Michal Gonda > On 18/05/2016 15:36, Michal G wrote: > > Hi, > > I have RS485 full-duplex IC on my board with outputs from the IC wired > as half-duplex. DE/RE pins connected to GPIO on HPS are used to controll > the transmission > > instead of RTS/CTS pins so I cannot use the RTS/CTS approach which is > already supported by the driver. > > I would like to ask if there is already some driver or framework how to > toggle dedicated pins during the switch between Tx/Rx. Or do I have to > implement this > > pins toggling into the driver by myself? > > > > G'day Michal > > You should be able to export the uart to the fpga and use loanio to remap > the hps gpio pins so that you can use the driver as is. > I did similar to get a PPS signal from a GPS module into the hps uart on > the correct signal for gpsd to work. > > > -- > Regards > Phil Reid > >
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