I am trying to modifying a PIC program to get a shift register to work
properly, toggle the clear pin on the shift register to force all outputs to
"0" to prevent it from holding the data for too long and burning out an
expensive solenoid.
The shift register is a 74HC595 and will occasionally lock an output on for
a long enough period to destroy a solenoid.
These solenoids are $350-00 each and they burn out around 40 to 50 a year on
the system.
Have tried a PIC group but have not received any replies.
I normally use AVR's with a C compiler the more that I see of the PIC the
more I dislike them!
Thanking You,
Owen.
Are you trying to modify a PIC program to operate on AVR?
Jim
On Mon, 2 Oct 2006 10:25:29 +1000
"OWEN-A" <oldboot@bigpond.com> wrote:
> I have a situation where a counter used in an interrupt
> may rollover before
> a compare is reached, for example the timer is set to
> 0x26 within the
> interrupt then decremented by one every time the
> interrupt is entered until
> 0 is reached, then reset to 0x26 again.
>
> PORTD PIN0 is set high somewhere within the count of 26
> down to 1 (or 0
> within the interrupt) and has to be set low after say
> 0x1A counts, if the
> counter is read when PORTD PIN0 is set high and is on
> 0x0F the counter will
> rollover before the turnoff point is reached, this may or
> may not happen
> depending on when PORTD PIN0 is set.
>
> I am not very proficient at assembly and any help would
> be appreciated I am
> modifying another person's program and the processor is a
> PIC16F877.
>
>
>
> Thanking You,
>
> Owen
>
>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
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RE: [AVR-Chat] Timer Counter
2006-10-03 by OWEN-A