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getchar()

 
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guest
Guest
getchar()
PostPosted: Wed Mar 01, 2006 2:12 pm     Reply with quote
Device = F628A with UART enabled

Can I write my own RDA interrupt and not affecting getchar() operation? Or can I cascade my ISR routine back to the CCS one?

Basically I want to stop any delay_xx() function when an incoming character like 0xff is in and reset the whole device to start from beginning and then start processing incoming UART streams (of course, the first chararcter will be discarded or lost).
kender



Joined: 09 Aug 2004
Posts: 768
Location: Silicon Valley

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Re: getchar()
PostPosted: Wed Mar 01, 2006 3:45 pm     Reply with quote
guest wrote:
Can I write my own RDA interrupt and not affecting getchar() operation?


Yes. If I'm not mistaken, and if I understood your question correctly, the following should work.
Code:

#INT_RDA
void isr_rda()
{
 // Anything goes here except getchar() and such
 // However, keep the ISR execution time as short as practical
}

void main()
{
 // initialize variables
 // initialize hardware
 // enable interrupts
 while (1)
 {
  getchar();
 }
}


Hope it helped.
Guest
PostPosted: Wed Mar 01, 2006 4:10 pm     Reply with quote
thanx!
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