[Oops, here's the comment that was supposed to go with that patch] With CYGIMP_HAL_COMMON_INTERRUPTS_CHAIN/CYGIMP_KERNEL_INTERRUPTS_CHAIN enabled you should be able to attach both channels to the same interrupt.
One problem with the generic 16x5x driver is that it masks/unmask the interrupt in the controller which isn't great if your UART is on a chained interrupt. I've attached a patch that changes the driver to enable/disable the interrupt source in the UART instead. Regards, Daniel -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
