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18F46K22: Wizard has HLVD (High/Low Voltage) grayed out

 
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jeffg28CLY



Joined: 24 Apr 2025
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18F46K22: Wizard has HLVD (High/Low Voltage) grayed out
PostPosted: Thu Apr 24, 2025 12:14 pm     Reply with quote
I'm still running an old version of the compiler, v5.075.
I started up the Project Wizard like normal, selected 18F family, 18F46K22, and went to the High/Low Voltage section to try out HLVD for something.
But all of the options in that section are grayed out - I can't enable anything. All of the options are visible, showing the various voltage limits, Above/Below Trip Point, and checkboxes for HLVD Enabled and LVD Enabled. All are grayed out.
I went through the other sections, thinking there was some dependency that was preventing it from working, but I'm not finding anything.
The PIC definitely has the hardware functionality - Pin_A5 is HLVDIN.

I tried turning pins on and off in the Analog section, turned on Vref in the CCP/Vref section (I can't set any Vref sources there though, it only gives VDD+/VSS-, all else is grayed out, hmm), I checked through the Fuses section... I'm not seeing a reason why the HLVD section is fully grayed out.
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PrinceNai



Joined: 31 Oct 2016
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PostPosted: Thu Apr 24, 2025 12:56 pm     Reply with quote
It is greyed out in 5.115 too, but maybe this post will help you:

https://www.ccsinfo.com/forum/viewtopic.php?t=46389

It seems setup_low_volt_detect( ) function is the way to go.
Ttelmah



Joined: 11 Mar 2010
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PostPosted: Fri Apr 25, 2025 12:08 am     Reply with quote
and honestly, don't use the wizard. It causes more problems than it fixes.
Learn to set things up for yourself. I can't think of anything it does really
well... Sad
jeffg28CLY



Joined: 24 Apr 2025
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PostPosted: Fri Apr 25, 2025 8:37 am     Reply with quote
Ttelmah wrote:
and honestly, don't use the wizard. It causes more problems than it fixes.
Learn to set things up for yourself. I can't think of anything it does really
well... Sad

I generally only use it as a jumping-off point, or as a reminder. "What is this function called? It's been a few years, I don't remember..." I can go several months between PIC programming projects, so each time I need to do it again, I'll be a bit rusty at the start.
And from there I'll consult the device's .h file so I can configure exactly what I need.


@PrinceNai - Ok good, thank you, that tells me I need to look up and use setup_low_volt_detect and use #INT_HLVD.
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