[ECOS] RedBoot serial rx interrupts
Sat Jan 13 07:17:00 GMT 2001
On 12-Jan-2001 Grant Edwards wrote:
> I've got RedBoot running fine without network support. It's
> using polled serial I/O: the individual serial Rx interrupts
> are unmasked but the global interrupt mask is set.
> [Why are interrupts being unmasked when polled I/O is being
It should not. Where are you seeing this [which file/line]?
> When I add network support, the global interrupt mask is
> cleared; cyg_hal_plf_serial_isr then consumes all of input
> data. RedBoot is still calling cyg_hal_plf_serial_getc() to
> try to read input, but it never sees any because it's all being
> consumed by the interrupt routine.
> Can anybody point me to something that explains RedBoot's use
> of interrupts?
RedBoot does not use interrupts.
> Is the network stack interrupt driven?
RedBoot's stack does not. eCos' does of course.
> Why does including network support clear the global interrupt
> mask bit?
It does not - or should not - for RedBoot.
> When is serial I/O interrupt driven?
Only when you use the serial I/O functions (serial_write, etc).
Are you sure about all of these questions? RedBoot absolutely _never_
touches interrupts. The only time interrupts are used is by eCos
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