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Recent Forum Posts

Re: SOLVED: Post #11 - IOC on negative edge sometimes triggers twice on single press

You should be able to set the pin type in the 16F18877 to either ST or TTL to match the 1937 type if that's what you're after.
I don't think your 'INLVLB = %00000100' statement changed anything for...
tumbleweed Yesterday, 15:10

Re: SOLVED: Post #11 - IOC on negative edge sometimes triggers twice on single press

Turns out I don't really have a choice to stay with the 16F18877:

- 16F1937 has TTL General Purpose pins.
- 16F18877 has TTL and ST General Purpose pins.

74HC14 only costs $0.09 at JLCPCB, but...
Demon Yesterday, 08:49

Re: IOC on negative edge sometimes triggers twice on single press

It's not a rant if you guys help me. I didn't know that about the IOC flag being set regardless (I've done a lot of reading on Interrupt - remembering what I read is something else entirely).
...
Demon - 6th September 2024, 20:13

Re: IOC on negative edge sometimes triggers twice on single press

Yes!
Quite often I see comments like don't do any work in the ISR, just set a flag and do the work in the main loop.

That's totally fine if what the ISR is doing is, for example, putting UART...
HenrikOlsson - 6th September 2024, 16:42

Re: IOC on negative edge sometimes triggers twice on single press

just a comment...

If you look at your code in post #1, the only thing the ISR does is set a flag that's read in your mainline code (NAV2_Swap_ON = 1).
You could drop all the interrupt stuff and...
tumbleweed - 6th September 2024, 13:57

Re: IOC on negative edge sometimes triggers twice on single press

9747

see the white negative going spikes that indicate when samples are taken by my routine,

the spikes are 1 uS in width , on my rigol 100MHz 1Gs/S oscilloscope @ 0.5mS/div they are not...
richard - 6th September 2024, 11:23

Re: IOC on negative edge sometimes triggers twice on single press

no,
why would you ever need microsecond responses to a key press ?
how are you determining the key was held for a reasonable time and not just noise ?
how are you determining the key was...
richard - 6th September 2024, 11:07

Re: IOC on negative edge sometimes triggers twice on single press

Look what I just found on p. 208:

EDIT: Hmmm, p.212 has 1 as default on port B (ST input).

Ill try with INLVLB = %00000100, but I doubt it'll make a difference.

EDIT SOME MORE: Nope,...
Demon - 6th September 2024, 09:42

Re: IOC on negative edge sometimes triggers twice on single press

But isn't IOC specifically designed to handle this? The 16F18877 has IOC across all pins...?

It's PWM on Contrast and Backlight on LCD. I have at least 4 LCDs. That would equate to 8 pots...
Demon - 6th September 2024, 09:36

Re: IOC on negative edge sometimes triggers twice on single press

The graphs show the signal at the switch and PIC pins; to confirm the absence of bounce on the signal.

The LCD in the foreground shows the frequencies being swapped back and forth.

- I...
Demon - 6th September 2024, 09:28

AMICUS

What is Amicus18?

Amicus is a multifunction development system inspired by the popular Arduino board, however, the Amicus board uses a Microchip PIC^® microcontroller instead of an Atmel AVR^tm type.

Comprehensive documentation and a helpful and friendly support environment, make using Amicus18 an easy and enjoyable experience for beginners and seasoned programmers.

Forum Moderator Mackrakit (Dave) very kindly ported the Proton BASIC Compiler code over to PBP3 and modified the original AMicus18 docuemts for PBP3 users.

...

Read More

The Amicus18 Board

Amicus18 is an embedded system platform based on a simple open hardware design for a single-board microcontroller, with embedded I/O support and a standard programming language. A great Partner for PBP3 and Perfect for the PBP3 Experimenter.

AMICUS18 in our on-line shop

...

Read More

Companion Sheild

The entry level shield is labelled The Companion Shield. This is a PCB laid out in the pattern of a solderless breadboard. The holes are single sided, which means that components can easily be removed using solder mop braid, or a solder vacuum tool, if a mistake is made, or components need to be re-used.

The (PBP3) Companion Shield Manual iCan be downloaded from here

See the Companion Shield in our on-line shop
...

Read More

GPS Shield

The Amicus GPS shield contains a multi channel GPS receiver, as well as a 16k byte (128 kbit) serial (I2C) eeprom, and a 3 Volt, 12mm battery socket in order to maintain the receiver's built-in RTC (Real Time Clock).

Available in our on-line store

...

Read More

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