PIC18F47Q10 ADC not working

[seokgi]

Hi. All
I am working with PIC18F47Q10.
However, the ADC does not work.
Did I make the wrong settings?

Thank you.

[Jay Dee]

Hi,
I'm no expert but check for me would be..
Have you confirmed the PIC programs, responds and is at the correct clock rate by just running the flash test, I assume you have an LED on ouput D0?
Confirm you have your input signal connected to PIN 2 (AN0) of the PIC
Note, the UART is sending out a the value as a string of characters, rather than a single value. worth checking this is the output type you wanted.
J.

[seokgi]

Connection is sure. The LED works well.
Thank you for your interest.

[Benj]

Hello,

Please can you provide more information on what is happening on the hardware. Is it locking up the processor when you call the sample routine or is it returning a static value?

[seokgi]

I tested Microchip's 02-01924's MCU with 18F47Q10 and then tested it for sure. But it doesn't work.

Thank you.

[medelec35]

then tested it for sure. But it doesn't work.

Ben is after more information than that.
For example if you apply full voltage on the ADC pin, what results do you get?
A value that stays fixed e.g 0 or a value that's drifting all over the place.
You need to be more specific of expected results verses actual results.

[seokgi]

Thank you for your interest.
I tried applying the power voltage.
And I tried changing the value through resistor.
However, the result is always "0".
Of course, the FC8 simulation works fine.

[Benj]

Many thanks,

I've put together this test based on code from the device datasheet. Worryingly the provided code didn't initially compile but with a few tweaks it's now compiling ok.

Please can you have a go and let me know how you get on.

Shoes_Case-test2.fcfx

(11.03 KiB) Downloaded 359 times

[seokgi]

ADC works normally. Thank you.
Can I turn this into an icon?

But the reason I tested the ADC is that the touch sensor doesn't work.

Does the touch sensor work?

[Lord Grezington]

Hi Ben

I have the same problem with the 18F24Q10. I have got 5 ADC's (AN0,4,5,7 & 18) that dont seem to be working (but work fine in simulation). Is it possible for you to send an update for the Q10 parts so all the additional C-code is not needed?

Thanks

EDIT - additional note. When testing the PWM's on the 24Q10 Channel 1 and 2 dont work (but compiles fine). When I try channel 3 or 4 I get the compiller errors below: (Datasheet only says there are two CCP Channels)

C:\ProgramData\MatrixTSL\FlowcodeV8\CAL\PIC\PIC_CAL_PWM.c:180:1: error: (192) undefined identifier "CCP4CON"
C:\ProgramData\MatrixTSL\FlowcodeV8\CAL\PIC\PIC_CAL_PWM.c:378:1: error: (192) undefined identifier "CCP4CON"
C:\ProgramData\MatrixTSL\FlowcodeV8\CAL\PIC\PIC_CAL_PWM.c:509:1: error: (192) undefined identifier "CCPR4L"
C:\ProgramData\MatrixTSL\FlowcodeV8\CAL\PIC\PIC_CAL_PWM.c1: error: (192) undefined identifier "CCPR4L"
C:\ProgramData\MatrixTSL\FlowcodeV8\CAL\PIC\PIC_CAL_PWM.c17: error: (192) undefined identifier "CCP4CON"

[Steve]

Thanks. We have been able to replicate your error and should be able to provide a fix soon.

[Lord Grezington]

Thanks Steve

[Benj]

Sorry it looks like the definition file may be wrong, there are only 2 CCP based PWM channels on this device. There are another 2 dedicated PWM channels so I'll see if I can get these working. Edit - this has now been done.

Regarding channels 1 and 2 not working. Please can you try enabling a timer interrupt on the same timer as the PWM is using and see if this gets the PWM started. If it does then this narrows down where I have to look.

I'll have another crack at the ADC component too now I know we have working code to play with.

[Lord Grezington]

Thanks Ben, I will update and give it a go

[Lord Grezington]

Hi Ben

OK, so if I have a basic program and test with a blinker program (just for sanity check):

If I had a PWM macro on channel 1, enable it then add a loop with setting the duty cycle to 100 - Nothing happens
If I add a timer interrupt on timer 2 with the HFINTOSC source, 1/128 prescaler, 1-16 post scaler calling a blank maco, PWM does not work.

EDIT - When I disable the PWM and toggle an output using Timer2 interrupt it works fine

Have you had a chance to look at the ADC's?

Thanks

[Lord Grezington]

Hi ben

Sorry to bump, but I have new hardware coming in this week for this and I really need the PWM and ADC's working. Have you managed to find time to make any progress?

Thanks
Graham

[Benj]

Investigating for you now to see if I can get anywhere.

Edit - hopefully PWM issue is now resolved. I'll move onto the ADC now and see if I can get anywhere with this.

[Lord Grezington]

Hi Ben

I have just ran this on hardware, I have tried using multiple PWM channels and timers. Unfortunatly it still does not seem to work.

I ran the updates and restarted.
The PWM works in simulation

Thanks

[Lord Grezington]

Hi Ben

If you send a program I will be happy to test and report my results.

The program I am using to test is attached.

Graham

[Lord Grezington]

Morning Ben

Do you think you might have a chance to take a look at this today? The new assembled PCB's should be arriving any minute now and it would be good if I can complete the project this week.

Thanks

[Benj]

Hello,

Sorry been very busy with other things. I'll have another go at this for you today and post here if the update system is still having problems.

edit. please can you try adding this to the defines section of the supplementary code window via the project options.

#define MX_TIMERSELECT0

I just want to see if that helps at all with the PWM problem.

[Lord Grezington]

Hi Ben

I have tested the "#define MX_TIMERSELECT0"

Unfortuntalty I still dont get anything when compiling on any of the PWM channels.

I measured all the pins just to be sure

UART still works fine

Thanks

[Benj]

Ok thanks,

I think I'll try and get a chip to play with. I'll have another go through the PWM code this afternoon to see if I can spot anything else. It's bound to be something really simple causing the problems.

Edit, just bought one of these hopefully it will be here tomorrow.
https://uk.farnell.com/microchip/dm1820 ... IC18F47Q10

[Lord Grezington]

Thanks Ben

[Benj]

Hello,

PWM now working just trying to push the latest fix to the update system and there's still a few kinks were working on here.

So for now you can use this file by copying it to this folder location "C:\ProgramData\MatrixTSL\FlowcodeV8\FCD\PIC"

18F47Q10.fcdx

(46.12 KiB) Downloaded 326 times

Copy the file and restart Flowcode and you should be good to go, I've tested both PWM types and this should fix all channels so they work. Let us know how you get on.

I'll look into the ADC issues next.