[ECOS] Custom Device Driver
Jonathan Larmour
jlarmour@redhat.com
Tue Mar 27 07:44:00 GMT 2001
Andy Simpkins wrote:
>
> I am integrating a GPS receiver into eCos, the problem is that the IP for
> this is in the form of an ARM ADS library. To overcome this problem I
> simply call the appropriate routine in memory when one of the relevant
> interrupts are received. The calling function takes the form of an eCos
> device driver. Great everything works, eCos and the GPS engine.
>
> The GPS engine currently flashes LEDs when a GPS event occurs. What I am
> now trying to do is get events generated by the GPS engine to be recognised
> by eCos. These events happen for example when there is position information
> available.
>
> 1. How would one go about incorporating this into a device driver?
Assuming it can deliver interrupts, write an ISR that acks the interrupt,
and returns a code instructing eCos to call a DSR.
> 2. How should I then pass this information out to interested threads?
Create a message box, and in the DSR, put the information in that. The
threads can then read out of it.
Jifl
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