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TickInit()

 
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SeeCwriter



Joined: 18 Nov 2013
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TickInit()
PostPosted: Mon Dec 08, 2014 4:42 pm     Reply with quote
Using an 18F87J60, with Ethernet.
TickInit() configures timer0 and it enables timer0 interrupts. Do I need to do anything for an interrupt routine? I don't see the purpose of enabling interrupts since the timer is used for measuring elapsed based on tick counts.

Steve
PCM programmer



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PostPosted: Mon Dec 08, 2014 5:53 pm     Reply with quote
I don't know what version of the CCS stack you have. But this version
shows that tick.c has a timer0 interrupt routine in it.
http://read.pudn.com/downloads165/sourcecode/internet/tcp_ip/756725/TCP-IP/drivers/Tick.c__.htm
SeeCwriter



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PostPosted: Tue Dec 09, 2014 9:29 am     Reply with quote
My version of tick.c has no interrupt handler. The last history entry is by Howard Schlunder on 6/13/07.
SeeCwriter



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PostPosted: Tue Dec 09, 2014 9:53 am     Reply with quote
Looking through Tick.c I found function TickUpdate(). The description says it "Updates the tick value when an interrupt occurs."

But since it's not declared as an interrupt routine, and it resets the interrupt flag of timer0, I'm assuming I need to create an isr and call this function from it. But clearing an interrupt flag from a non-interrupt function seems risky.

In any case, I think I answered my own question.

Steve
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