PIC18F452 doesn't start

[Zwizzle]

Hi all,

I have recently migrated a project from the 16f877 to the 18f452, due to lack of space. I use MPLab 6.13, and the ICD2 programmer. Problem that occured is this: the PIC won't start. If I load it without debug mode, it doesn't do anything. If I use it *with* debug mode, it still doesn't do anything, although I can force it by 'stepping into' the code. If I do this, the ICD2 seems to reset several times before it takes the next step. In other words: it's useless. I've been fiddeling with the config bits, but no such luck so far. Does anyone recognize this?

Thanks!
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This message was ported from CCS's old forum
Original Post ID: 12930

[Neutone]

:=Hi all,
:=
:=I have recently migrated a project from the 16f877 to the 18f452, due to lack of space. I use MPLab 6.13, and the ICD2 programmer. Problem that occured is this: the PIC won't start. If I load it without debug mode, it doesn't do anything. If I use it *with* debug mode, it still doesn't do anything, although I can force it by 'stepping into' the code. If I do this, the ICD2 seems to reset several times before it takes the next step. In other words: it's useless. I've been fiddeling with the config bits, but no such luck so far. Does anyone recognize this?
:=
:=Thanks!

Did you unplug the ICD2 from the circuit? While it is pluged into the circuit it will hold the circuit in reset.
___________________________
This message was ported from CCS's old forum
Original Post ID: 12933

[Zwizzle]

:=Did you unplug the ICD2 from the circuit? While it is pluged into the circuit it will hold the circuit in reset.

Yes I did. I also started a new project and pasted CCS's Watchdog18 example into it. It has the same problem: it compiles, but won't run, not in debug mode and not without it. HEX upload to the PIC18 is ok, ie. I can read it back without errors. I've installed the right crystal (HS), every internal 'device' (watchdog timer, powerup timer, etc) are disabled. And still the device doesn't start.
___________________________
This message was ported from CCS's old forum
Original Post ID: 12935