oscilloscope and pic

[aduri]

Hello friends,
I made a oscilloscope for pic from
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I used a PIC18f4550 instead of a PI18F2550
I try to load this flile .hex
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generated by this CCS code
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I don't understand......
Show only the positive part of a sine wave and it is positioned at the bottom.
The frequency and the line of zero-crossing dont'works.

Can you send me a other .hex generated by you with the annexed code.

bye
Antonio

 

[Ian Rogers]

I think this scope (as the schematics show ) has a 0-5v input.... What wave form are you sampling? you may need to level shift using an op-amp.

 

[aduri]

Probably is so but in any case also with the offset to 2.5 V (set my generator) the dots is not positioned in
half of the screen and the frequency and the trigger don't works.

Thanks
Antonio

 

[be80be]

aduri If you would go to semifluid.com he is a real cool person from what I hear he will email you back if you ask him nicely how to fix your problem His code was done a full version of CCS I think and your not to post library files so he was kind enough to post Hex for these .

‘List of codes to send first:’ in the ‘Options’ menu. Please feel free to contact me if you have any problems.

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[aduri]

OK
I will try this way.

Tanks

ciao
Antonio