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Recent Forum Posts

Re: Error compiling with DT Interrupts

Hi Richard,

thank you so much for your quick reply.

And once again you are 100% correct.
How could i be so blind?

Thanks. It now compiles correctly.
PaulMaker Yesterday, 23:18

Re: Error compiling with DT Interrupts

INT_Handler USART_RX_INT, _RxISR, PBP, yes

dt ints does not have an interrupt called USART_RX_INT perhaps you mean RX_INT
richard Yesterday, 22:22

Error compiling with DT Interrupts

Hi guys,

i'm a bit lost with a very small and simple program which does not compile when using DT interrupt library on the 18F2580.

I was hopping someone more inteligent could help figure out...
PaulMaker Yesterday, 21:48

Re: 12F683 interrupt on change improvement?

The output is pretty clean in my experience. I use my photodiode in photoconductive mode (reverse bias), which makes it faster and supposedly noisier but I haven't noticed any noise except in some...
achilles03 - 13th January 2026, 04:23

Re: 12F683 interrupt on change improvement?

There are less complicated ways i think

'PIC-12F683#CONFIG
__config _FOSC_EC & _WDT_OFF & _CP_OFF & _MCLRE_OFF & _PWRTE_ON & _CPD_OFF &_FCMEN_OFF &_IESO_OFF
#ENDCONFIG

DEFINE OSC 8
richard - 13th January 2026, 03:44

Re: 12F683 interrupt on change improvement?

Yep, that did it! The output is now as smooth as the 16F883's output. The 16F883 used the INT_INT interrupt from the start. The GPC_INT requires the particulars you noted, and additionally it...
achilles03 - 13th January 2026, 03:30

Re: 12F683 interrupt on change improvement?

Hi Dave,

How clean is the output from your photodiode?
I have been working on a similar setup recently using an encoder wheel and photointerrupter.
I had greater success feeding the MCU's input...
Aussie Barry - 13th January 2026, 00:54

Re: 12F683 interrupt on change improvement?

i would

you are not using IOC correctly since the gpio is never read in the isr to clear the change condition

4.2.3 INTERRUPT-ON-CHANGE
Each of the GPIO pins is individually...
richard - 12th January 2026, 23:52

Re: 12F683 interrupt on change improvement?

I had thought - should I be using "INT_INT" instead of "GPC_INT"? It is set up using GPIO.2 as the interrupt pin, which is the dedicated INT pin per the datasheet. Can you set up an interrupt on...
achilles03 - 12th January 2026, 23:29

12F683 interrupt on change improvement?

I have a project using three 12F683s controlled by a 16F883 master. The goal of the project is to track the RPM of 4 independant propellers on a quadcopter using an IR photodiode and emitter (i.e. a...
achilles03 - 12th January 2026, 21:58

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