Re: [ECOS] serial line ISR problem -- again:(

[Piotr Trojanek <ptroja at elproma dot com dot pl>]

On Tue, Sep 09, 2003 at 02:01:24PM +0100, Robert Cragie wrote:
> 1) I don't see how you are 'living without any DSR' based on your posted
> code.

I just posted one from my 200 versions, which doesn't work:)

> 2) You're signalling a semaphore in the DSR to kick the thread to print 'c',
> so this won't work unless you do as Eric suggests.

I was trying without semaphore too.

> 3) Why are you reading 8 times into 'ier' (you will end up with the scratch
> register in 'ier')? To clear the pending modem interrupt, you only need to
> read the modem status register (base + 6).

Because I was trying, and reading (base + 6) doesn't work.
That's not the problem -- if it was, I would get my ISR to work only
once, but it doesn't run at all.

> 4) You should be looking at IIR to determine if there is a pending
> interrupt. Try something like the following for isr() and dsr():

But I would have to do it in ISR, which I can't make to work.

-- 
Piotr Trojanek

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