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18f452

 
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cgorbet
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18f452
PostPosted: Sat Oct 29, 2005 5:12 pm     Reply with quote
I am trying to use the ICD-2 to program an 18f452 part. I can program the part, but it does not run the same as in debug mode. When I program the part and leave the ICD connected, the unit runs fine. Even when I program it, release reset and unplug the ICD, it runs ok. Then when I turn the unit off, and back on, it runs differently. Differently means, I am using the A/D channels to monitor voltages and produce tones associated with different levels. These levels are at lease 200mv apart. It runs great in debug mode, but when programmed the tones are different for the scaled voltages. I have asked Microchip, and tried all they have offered. I noticed in the examples of CCS, the fuses can be set for NOLVP, however the CCS compiler does not recogize the command. Can anyone help???
cgorbet
asmallri



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Re: 18f452
PostPosted: Tue Nov 01, 2005 10:18 am     Reply with quote
cgorbet wrote:
I am trying to use the ICD-2 to program an 18f452 part. I can program the part, but it does not run the same as in debug mode. When I program the part and leave the ICD connected, the unit runs fine. Even when I program it, release reset and unplug the ICD, it runs ok. Then when I turn the unit off, and back on, it runs differently. Differently means, I am using the A/D channels to monitor voltages and produce tones associated with different levels. These levels are at lease 200mv apart. It runs great in debug mode, but when programmed the tones are different for the scaled voltages. I have asked Microchip, and tried all they have offered. I noticed in the examples of CSS, the fuses can be set for NOLVP, however the CSS compiler does not recogize the command. Can anyone help???
cgorbet


Are you using the PLL? When using the H4 fuse this only gets set/cleared with the PIC is power cycled. This would explain the different tone (frquency)
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