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I wanted to read analog voltage(0-5v) using basic atom pro ..used the following program..

temp var word
main
adin p0,temp
serout s_out,i9600,[0,"analog voltage= ",dec temp]
pause 10
goto main

I used ADIN cmd..this one will give 1024 positions. so GND=0 AND 5V=1023
but it is giving same output as 1023 for all voltage b/w 0 and 5v
why it is not giving correct position value according to the voltage..? is there anything wrong with the program?
can anyone plz help me..

Which AtomPro are you using? Also can you describe your wiring? Are you using a devboard? What is supplying the analog voltage(sensor,POT)?

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Basic Micro - Robotic Technology Evolved

I'm using basic atom pro 40..and devboard also..
i have given analog voltage to the pin p0 using POT..

1. checked the actual voltage at P0 with a multimeter
2. please try another pin
3. make sure the chip selection drop down is set to Auto, or AtomPro40.

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Basic Micro - Robotic Technology Evolved

[quote="Acidtech"]1. checked the actual voltage at P0 with a multimeter
2. please try another pin
3. make sure the chip selection drop down is set to Auto, or AtomPro40.[/quo

thank you.. problem is with the p0 voltage. voltage at p0 is different..
This might happened due to loose wiring connections.
now i have checked all the connections and voltage at p0 also..it is giving output as
1v=294
2v=570
3v=860
4v=1023
5v=1023
i tried with other pins and got the same o/p as above..
why it is giving 1023 positions for 4v?

Hmm. This usually indicates you are not on the pin it is actually reading, just one that is near by. Inductive/Capacitive coupling(can't remember which causes it) is why nearby floating pins will see voltage changes when a pin near by is changing it's voltage.

What version of Studio are you using? You should be using the latest version(2.0.0.14). If you aren't uninstall Studio and install 2.0.0.14.

Also, assuming you are already using the latest Studio, manually select AtomPro40 instead of Auto in the drop down. This will garuntee it is using the AtomPro40 pin mappings and we can see what happens from there.

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Basic Micro - Robotic Technology Evolved

I'm using 2.0.0.8 version.I unstalled that one and installed 2.0.0.14 version.
I have given the voltage to pin p0 and trying to read the voltage from that pin.But still it is giving the same o/p as i said earlier.

WHat is your exact circuit for the pot producing the voltage? Also what brand of pot. I've got some pots that don't go to ground, which could explain why yours isn't. Not sure why it is getting to 1023 before it should. Can you check the Vdd pin on the module and make sure it is aty 5v and not 4v. If it is at 4v that would explain the early reading.

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Tech Support
Basic Micro - Robotic Technology Evolved

Thank you for guiding me. I found out the problem with your help.
Actually circuit is generating a square wave of amplitude 0-5v. I have checked out the voltage at vdd pin,it is 3.7v approximately. I have given 5v power supply to the development kit (and to my circuit also as it needs strictly 5v). but dev kit has 7805 regulator included in it which regultes 5v to 3.7v. After increasing power supply to 6v,
BAP is giving the exact reading.