> Unless i have overlooked something, i do not see how to toggle the > automatic RTS mode from W83627UHG's datasheet. Have you found it? Yes, searching for '485' gives you all the info you need (if we got the same datasheet). > Regarding 2.6.38+ drivers, Atmel supports RS485 on the hardware level > and Etrax is handling the RTS toggling directly from the driver. I Hardware level is the only official supported way in Linux. Software toggling can easily fail due to preemption. > guess this is what i will finally have to do, i.e. to toggle RTS from > the driver myself. Why? If the hardware has support? > I am surprised that the RTS toggling issue for RS485 in Linux is > around for quite a while. It has come a long way, but all you need is there now (except for software based direction control, see above). Regards, Wolfram -- Pengutronix e.K. | Wolfram Sang | Industrial Linux Solutions | http://www.pengutronix.de/ |
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