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Recent Forum Posts

Re: K42 and Timer Interrupts

Thanks for the explanation.

I misinterpreted these paragraphs. My understanding was to have ASYNC cleared and use Fosc/4.

Ioannis
Ioannis - 28th April 2025, 19:28

Re: K42 and Timer Interrupts

The SYNC block uses FOSC/4 as its sync clock, so it's difficult to use it if it's using FOSC/4 as its input source for counting too.

9966

for 16-bit read/write see sec 20.1.1.1:

9965

In...
tumbleweed - 28th April 2025, 18:11

Re: K42 and Timer Interrupts

Sure it is. Inside the ISR, Timer 0 is stopped, reloaded and restarted.

I think is it obligatory to use Fosc/4. Unless I misunderstood the DS. Then why is it necessary to use ASYNC=1? Could...
Ioannis - 28th April 2025, 17:35

Re: K42 and Timer Interrupts

Two things...

Since you're using FOSC/4 as the source, set ASYNC bit in T0CON1.

Also, when using 16 bit mode (MD16=1) you should always write TMR0H then TMR0L in that order so that the high...
tumbleweed - 28th April 2025, 00:25

Re: K42 and Timer Interrupts

looks like not reloading the tmr count every ms....... after first int, tmr counter looping from 0 .....???
amgen - 27th April 2025, 22:54

Re: K42 and Timer Interrupts

Tried the files and indeed it worked OK. Sort off...

I tried to setup the Timer 0 as 16bit timer, cloked by Fosc/4 with system clock at 64MHz.

Reload value $C187

The toggle happens every 4...
Ioannis - 27th April 2025, 18:34

Re: K42 and Timer Interrupts

Thanks Richard.

Ioannis
Ioannis - 27th April 2025, 16:26

Re: K42 and Timer Interrupts

sheldon sent me these for a project i was assisting with. it all seemed to work
richard - 27th April 2025, 00:47

K42 and Timer Interrupts

I wonder if anyone managed to work with DT-INTS18 with the K42 series chips.

The latest DT_INTS-18_K42c.bas file that tumbleweed posted (on this closed thread...
Ioannis - 26th April 2025, 11:58

Melanie
Sorting Numbers

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Melanie

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Published on - 2nd July 2010 16:35 Number of Views: 9946

In professional embedded applications, when you take an ADC reading, good practice states that you take more than one and ...

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Easy LCD Contrast

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Melanie

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Published on - 1st June 2010 05:02 Number of Views: 9759

Here's a useful and very simple way of controlling the contrast on an LCD with just two Resistors and a line of code. If ...

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Olympic Timer

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Melanie

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Published on - 31st May 2010 17:38 Number of Views: 9073

It's almost Olympics time... so here's a topical program using PBP exclusively (no embedded Assembler) to give you a Stop-Watch ...

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Presetting Configuration Fuses (PIC Defines) into your Program

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Melanie

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Published on - 20th May 2010 16:27 Number of Views: 12306

1. What are the Configuration Fuses?
2. How can I preset them in my Program?
2.a. When using MeLabs default ...

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Bits, Bytes Words and Arrays

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Melanie

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Published on - 23rd April 2010 19:39 Number of Views: 9985

1. How can I reference a BIT in a BYTE?
2. How can I reference a BIT in a WORD?
3. How can I reference a BIT in a BYTE ARRAY?
4. How can I reference a BIT in a WORD ARRAY?
5. How can I reference a BYTE in a WORD ARRAY?
...

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I’m Running Out of CodeSpace, What Can I Do?

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Melanie

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Published on - 23rd April 2010 19:28 Number of Views: 12076

I’m Running Out of CodeSpace, What can I do?
My progam is too slow - What can I do?

Apart from the obvious and move to a faster PIC with more program memory, there’s a few little known tricks you can try.
...

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