Please help, what am I doing wrong.

skylinux · Joined: 02 Oct 2005 Posts: 2

I'm attempting to build a robot and have some problems with CCS sleep at the end.
My program runs the way I want it but it will sleep at the end. I have cut out most code and it still does it. Please help, I don't see my error.

kender · Joined: 09 Aug 2004 Posts: 768 Location: Silicon Valley

You are turning the LED off immideately after you turn it on. Add a delay after you output_high(PIN_A0).

Ttelma · Guest

You are actually sitting in a loop, with pin_a0, pulled permanently low. It'll go high for just a couple of machine cycles, with the 'output-high_ instruction, and then the jump back to the output_low instruction. Now Kender, has pointed out, that to get it to visibly 'flash', you will need the second delay, to extend the 'off' time.
As a seperate comment, what resistor value have you got to limit current to the LED, and what type of LED is it?. If you have a LED directly connected, and no limit resistor, you may well be overloading the chip, which could cause the code to really get screwed up when running...

Best Wishes

skylinux · Joined: 02 Oct 2005 Posts: 2

I can't believe I did not see that, well that's where the MPLAB simulator was very helpfull.
Will the ICD-U40 allow me to do a line by line debug like MPLAB's simulator?
And if so, is the ICD-U40 sold by CCS the best choice for a $ < $100 debugger or are there better alternatives?

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Remember that the CCS debugger requires PCW or PCWH.
You can't use it with MPLAB.

mcafzap · Joined: 07 Sep 2003 Posts: 46 Location: Manchester, UK

Yes, the ICDU40 works as a good debugger if you use it with PCWH. I believe you can load it with code to have it behave like an ICD 2.

I still have a Microchip ICD 2 and this is the cheapest way to go because MPLAB is free. However, I prefer the interface that CCS provides.

Steve

Guest · Posted: Sun Oct 09, 2005 7:27 pm

Ok, I tried it and of course the missing delay kept it from blinking.
My original problem solved itself. I sync my laptop's programming directory to my desktop's programming folder every time they "see" each other. Something must have gone wrong since the new code section with the problem was gone. I rewrote it and it works almost perfect.

My bot seeks a target, pushes it out of the ring, once it disappears from sensor it will go back to finding targets, turning the way the target was last seen. The turning towards the last target part does not always work right but I'm getting there.