Problem Programming 16F870 when adding ON INTERRUPT

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- 2nd August 2010, 20:21
dream-

Problem Programming 16F870 when adding ON INTERRUPT

I have a "strange" problem with a 16F870.

I have a piece of code that gives me an error in the programmer application. But this error only happens if I introduce the line "ON INTERRUPT GOTO ISR". I remove that line and the PIC gets programmed correctly.

Code:

... INTCON = %00100000 ' Enable TMR0 interrupts OPTION_REG = %00000111 ' Initialise the prescale TMR0 = 217 ' Load TMR0 register ON INTERRUPT GOTO ISR INTCON = %10100000 ' Enable Interrupts ... DISABLE ISR: TMR0 = 216 ... INTCON.2 = 0 ' Re-enable TMR0 interrupts RESUME ' Return to main program ENABLE END

Any ideas?
- 2nd August 2010, 21:29
mackrackit

Intcon.5 = 1 'enable tmr0
- 2nd August 2010, 21:47
dream-

Quote:

Originally Posted by mackrackit

Intcon.5 = 1 'enable tmr0

Unfortunately this didn't do anything :(

I just tested this code on a 16F870 and a 16F628A:

Code:

led var PORTB.7 OPTION_REG = $7f ' Enable PORTB pullups On Interrupt Goto myint ' Define interrupt handler INTCON = $90 ' Enable INTE interrupt loop: High led ' Turn LED on Goto loop ' Do it forever ' Interrupt handler Disable ' No interrupts past this point myint: Low led ' If we get here, turn LED off Pause 500 ' Wait .5 seconds INTCON.1 = 0 ' Clear interrupt flag Resume ' Return to main program Enable

I get the error in the PROGRAMMER in both cases. The error is in the code verification stage.

Why would the programmer give this type of error, as if the code was not being written properly to the PIC? If I remove the "ON INTERRUPT" line, the code saves perfectly. I have been using this programmer for a while and had no problems until this one.

Is the PICBASIC compiler inserting code in a non-programable area or something?
- 2nd August 2010, 23:20
mackrackit

Quote:

The error is in the code verification stage.

What programmer are you using?
- 2nd August 2010, 23:44
dream-

Quote:

Originally Posted by mackrackit

What programmer are you using?

VOLNIA USP 3.0

I am in contact with the company and sent them the .hex, they will be investigating.
- 3rd August 2010, 00:49
dream-

Problem Solved, it was an issue with the programmer. They updated my software (which updated the firmware too), and now it all works.

Thank you Mackrackit for your responses!
- 10th March 2011, 07:56
cmottaa

Re: Problem Programming 16F870 when adding ON INTERRUPT

Did u still got the update/firmware file...?
Or something?
The company dissappeared and my USP is dropping the same issue...