[ECOS] HAL macros and RTC

Nick Garnett nickg@ecoscentric.com
Wed Jan 29 18:53:00 GMT 2003


Fabrice Gautier <Fabrice_Gautier@sdesigns.com> writes:

> 
> I dont know if the "on core timer" is always plugged into the same IRQ line
> for MIPS or PPC,

It is, it's part of the architecture definition.

> but thats not the case for me. I think we should have in
> the guide: 
> 
> "You only have to calculate and enter the proper CYGNUM_HAL_RTC_CONSTANTS
> definitions in the platform CDL file and define CYGNUM_HAL_INTERRUPT_RTC in
> [some include file]"

Good point, I'll take a look at doing that.

> 
> By the way shouldnt the interrupt be a CDL option like the other RTC related
> constants ?

Not really. The interrupt used is fixed by the hardware of the timer,
usually. If a particular platform provided several timers, and if the
HAL implementor chose to allow a choice, then indeed this value might
need to change along with the definitions of the HAL_CLOCK_*()
macros. 

-- 
Nick Garnett - eCos Kernel Architect
http://www.eCosCentric.com/


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