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Bilal
Joined: 24 Apr 2010
Posts: 75
Location: Islamabad
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| PIC Controllers |
 Posted: Fri Mar 18, 2011 4:24 am |
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Hi. I have a ICD2 Clone. It has PIC18F4550 (for usb interface) and PIC16F877A and I use it with MPLAB. More often when I connect my ICD2 it shows "unknown device" and it don't work. When I reprogram both controllers it will work fine again. It seems that both controllers program memory get corrupted.
Means PIC controllers are unreliable?
Or some other problem did this.
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temtronic
Joined: 01 Jul 2010
Posts: 9246
Location: Greensville,Ontario
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| Posted: Fri Mar 18, 2011 5:38 am |
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PICs are very tough and reliable. The 'unknown device' error I suspect is from the software used to program the actual PIC. All programmers cannot 'read' a PIC to see what type it is(not possible), so you have to tell it. Since you have a 'clone' and not a real ICD, the manufacturer probably didn't make an exact copy of the MC product.There could be a weakness in the power supply, board layout, marginal copper,etc.
Also what software are you using to program the PIC with? Again if not the 'real' product, there may be a flaw or bug in it. |
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bkamen
Joined: 07 Jan 2004
Posts: 1615
Location: Central Illinois, USA
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| Posted: Fri Mar 18, 2011 12:45 pm |
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| temtronic wrote: | PICs are very tough and reliable. The 'unknown device' error I suspect is from the software used to program the actual PIC. All programmers cannot 'read' a PIC to see what type it is(not possible), so you have to tell it. Since you have a 'clone' and not a real ICD, the manufacturer probably didn't make an exact copy of the MC product.There could be a weakness in the power supply, board layout, marginal copper,etc.
Also what software are you using to program the PIC with? Again if not the 'real' product, there may be a flaw or bug in it. |
Sort of.
Newer PIC's do have a deviceID -- but not all PIC's have them. So while an official ICD3 might be able to plug in and say "this is an 18F46j11" -- third party programmers may not be so smart.
So always make sure you have the devices set correctly unless you are absolutely sure your hardware can handle otherwise.
-Ben
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Dazed and confused? I don't think so. Just "plain lost" will do. :D |
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Bilal
Joined: 24 Apr 2010
Posts: 75
Location: Islamabad
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| Posted: Sun Mar 20, 2011 5:41 am |
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I am using Genius540 to program both my PICs.
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