Matrix user forums

Hello,
I soldered a trimmer to analog 0, read out the value and send it out over rs232.
The voltage on the trimmer is 0 Volts. Setting the U-reference to VDD and VCC, the trimmer voltage is changing by turning.
I thought, that setting up the reference in the trimmer component is OK, but it don`t works. The rs232 sends out only 0x01. The trimmer
at the pic can`t change the value anywhere. 2 other tested analog channels are running well.
Is there a bug in the component?
In simulation it works fine.

Best regards
Jörg


Solution for me: I switch over the adc component to analog 1 for plan b. It works! Then I switch back to analog 0 and it works, too.
Is there a toggle bit error in the component? All other analog channels works advanced.

Hello Jörg

I'm not aware of a bug but if you find a way to replicate the problem then I will investigate for you.

Hello Benj,
I don`t touch in the moment the adc component, while it`s running. Today I made an update with Flowcode and see,
that the adc component was updated. Do you found something?

Best
regards

Jörg

Hi Jörg,
Just looked at the file.
Looks like the change was only to do with 18F24Q10 & 18F25Q10.
Probably to do with this bug report

I don't know how much its related to 16F1829?
I have got a 16F1824, which uses the same adc registers as 16F1829.
The very odd thing is if I use FRC setting for conversion speed, with An0 or An1 the chip locks up!
ok with all other channels.
This occurs if clock frequency is above 8MHz.
If I change ADC conversion speed to Fosc/64, An0 and An1 work perfectly.
Can to give that a go?

Hi Martin,
my project is now finished and runs.

To the problem AN0 is not working:
Your comment --> "The very odd thing is if I use FRC setting for conversion speed, with An0 or An1 the chip locks up!"
My cpu speed is 1MHz and frc clock for the adc, where I have the problems. In the datasheet you should use frc or devider by 2 and 4.
The errata sheet has no entry about the adc. I decided to set up the devider to 4 with intern clock. This runs without problems.

I will do my own "read me"-file with tips for this cpu.

Importend: This is no bug by Matrix !!!


Thanks for your help.


Jörg

Glad your project is up and running.
Thank you for keeping us updated.
As this is a bug with silicon and not Flowcode, I have moved topic from the bug section to somewhere more suitable.