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disable one interrupt from another interrupt routine

 
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PCM Novice
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disable one interrupt from another interrupt routine
PostPosted: Tue Dec 24, 2002 4:10 am     Reply with quote

<font face="Courier New" size=-1>I was trying to do the following on a 18F452 does it make sense?
Does the diable_interrupts fuction work within an intterupt routine, and can it be used without the disable_interrupts(global)?

#int_RDA
RDA_isr()
{

char ch;
enable_interrupts(INT_TIMER2); // enable timer 2 interrupt
set_timer2(0);
timer_timeout = FALSE;

ch = getc();
}


#int_TIMER2
TIMER2_isr() {

timer_timeout = TRUE;
disable_interrupts(INT_TIMER2); // disable this interrupt untill another character is received.

}


// Happy Christmas!</font>
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PCM programmer



Joined: 06 Sep 2003
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Re: disable one interrupt from another interrupt routine
PostPosted: Tue Dec 24, 2002 12:57 pm     Reply with quote

<font face="Courier New" size=-1>I did something similar on a 16C77, in which I had an interrupt
driven keypad routine. When a key was pressed, an INT_RB would
occur. In the INT_RB isr, I started a timer and enabled
interrupts for it. This provided the debounce delay.
When the timer interrupt occurred, I disabled its interrupt,
re-enabled the INT_RB (which I had disabled in the INT_RB isr),
and read the keypad. GLOBAL interrupts were always enabled.


</font>
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PCM Novice
Guest







Re: disable one interrupt from another interrupt routine
PostPosted: Fri Dec 27, 2002 2:31 pm     Reply with quote

'Sounds like it may work. I'll try it and hope that the 18F interrupt priorities don't cause problems.
Thanks

:=<font face="Courier New" size=-1>I did something similar on a 16C77, in which I had an interrupt
:=driven keypad routine. When a key was pressed, an INT_RB would
:=occur. In the INT_RB isr, I started a timer and enabled
:=interrupts for it. This provided the debounce delay.
:=When the timer interrupt occurred, I disabled its interrupt,
:=re-enabled the INT_RB (which I had disabled in the INT_RB isr),
:=and read the keypad. GLOBAL interrupts were always enabled.
:=
:=
:=</font>
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Original Post ID: 10273
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