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No, 5v all the way unless the app calls for 3v3 (typically when I use a Nokia GLCD). In any case the PIC should be able to handle 3v3 at low speeds, surely?

The pcb has bunches of decoupling...

Hi All,

Just had a chance to try Mike's suggestion, terminal result below, still no good.



Power-on: 00011001 - 00011101
Priming PCON: 00011001 - 00011111

I'm Alive

Well, I found and tried another (new) 1788 but no difference. Fully isolating the programming cable and interface also made no difference, the fault persists.

I then went to a 16F886 and made...

Hi Richard,

I made a general purpose pcb a while ago for dil28 PICs that has breakouts for each pin and a 'shield' that sits over it for ease of changing displays (Nokia, 16x2, GLCD, etc). It has...

Thanks for your help guys,

@ Ioannis
Disabling the WDT was one of the first things I tried, no change.

@ Henrik
Please see terminal capture below after including your suggested debug code...

Hi Henrik,

Thanks for joining, your input is welcome.

Inserting your code shows (terminal output):



00011001 - 01010100

Hi Richard,

I don't see where you're going with your comments, maybe I'm just thick.

In any case the Int Handler does recognize CW and CCW correctly with every turn and RE_val does increment or...

Hi Richard,

Thanks for your help and guidance, as always.

I took your hints and made appropriate adjustments (see below) but the rogue serial persists... With your preferred method I'd like to...

Hi Folks,

I'm trying to get my head around what is happening with my attempt at using a Rotary Encoder... it is functional however something weird is happening periodically returning from the...