Well I guess if I can't get it working soon, I'll most probably do that. Thanks, please let me know if anyone else knows what im doing wrong.
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Well I guess if I can't get it working soon, I'll most probably do that. Thanks, please let me know if anyone else knows what im doing wrong.
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For grins, try changing your variable names and accessing registers like the MEMCON, PSPCON, etc. with the peek/poke to their actual locations vs. using their actual names...Originally Posted by nverma
Ya never know...
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We could still compile a HEX file with PBP 2.47 to see what happen?
Unfortunately i don't have those on hand... out of stock and there's no plan around them soon. Even if it was the case....
http://www.microchip.com/stellent/id...ct1=PIC18F8720
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
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Back a few years ago, when I saw the errata sheet for the 4Mhz limitation, I put that MCU in 'Not Recommended for ANY design' bin.
I've got a couple of '8722's that haven't failed me yet (well, at least any more than anything else).
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I found the problem! So surprising enough, PORTD needs to be driven at more current, I replaced the 10K resistor arrays with 1.5K resistor and now it seems to be working fine. But really these CMOS inputs should not need this much current. Just thought you guys would be curious. Thanks!
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That's a bit of a worry. With 877's on PORTD, I typically use 100KΩ + resistors with no problems at all. Theoretically, with CMOS - up to 1MΩ should actually work.
Last edited by T.Jackson; - 15th May 2007 at 17:56.
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....which is why mr_e suggested posting a schematic or something like it back in post #4....
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and 18Fs are actually a bit much noise sensitive than 16Fs.
10K to 1.5k seems a big jump, but if this working...
100K - 1Minternal Pull-up, are better than this. Not something i would use/trust myself in a noisy environment 100000 X
Now, maybe i'm wrong, i didn't read the whole thing once again, but it might be caused by a Read-Write-Modify thingy.
General 18Fs rules, You write to PORTx, you read from LATx.
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
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