On Thu, 10 Jul 2008 09:16:40 -0500 > I believe that he is referring to something much simpler than you are > thinking. He is talking about 2-wire RS485 transmissions in which the > RTS signal is used to enable the driver chips just before transmitting Its all the same thing. And actually the radios are often RS485 > > That seems to best be done in user space as the algorithms are quite > > variable and some are complex. > > Do we really benefit from having this in kernel ? > The problem that can come up when executing this feature in user-land > (though not exactly common) is when the hardware on the other end > responds to your message faster than your user app was able to detect > that the UART is finished and then toggle RTS. When this happens both > ends are trying to drive the line and you have bus contention, lost data > and possibly damage to the driver chips themselves. The chips are quite safe. Can we stick to real reasons. In terms of performance you can manage RTS with a real time application if need be and that will give you very close to kernel side response time. Alan -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
