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

[Eric Doenges]

Piotr Trojanek wrote:
> On Tue, Sep 09, 2003 at 09:46:39AM +0200, Eric Doenges wrote:
> 
>>If you want your DSR to run, I believe you have to
>>return CYG_ISR_HANDLED | CYG_ISR_CALL_DSR;
>>here. This may be your problem.
> 
> 
> no, I was trying to live without any DSR  -- incrementing 'voilatile int'
> in ISR and printing it in 'for(;;) printf(...)' thread. it doesnt work:(
> ISR doesn't run at all.
> 

Since I'm not familiar with 16550 programming, I don't know if you are
using it correctly (you might want to check your code against the
generic 16550 driver included with eCos). Are you sure COM1 is located
at IO address 0x3f8 and uses IRQ 4 ? Many boards' BIOSes allow you to
change at least the interrupt line used.
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