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It's only doing a simple repetitive task - triggered on dig ip by comparators, dig ops driving at any one time one of several hard pull-up transistors in a multiple 1-wire master circuit, with...

Looking to get a bit more speed out of an pre-existing circuit that uses a 16F873a (max 20MHz clock), did a search for faster pin-compatible or almost pin-compatible 28-pin 16F's. Decided on the...

Pedja - very instructive video!
Since there is an onboard 1Mbit FRAM on the hardware that could be used for the intermediate storage of the serially-uploaded code, I'll give it a try. Thanks for...

... and for the curious:

The application is existing PIC-based hardware used for environmental monitoring in grain storage silos.
Because of the potentially explosive atmosphere, there are strict...

Thanks for all the replies, apologies for the late response.
Yes, it would make a lot more sense to use a bootloader, and although I will take a look at the adapter described in the link sent by...

Anyone with experience of ICP of 18F... (or 16F...) via optocouplers?
I need electrical isolation for safety reasons between the PIC circuit and a permanently-connected-PC-with-Internet.
Can use...

Found an error in the CRC8LU subroutine when validating CRC byte after doing a 1-wire search.
A CRC of $F0 on a device returns an error.
This is because of a typo in Tom's code, the value 140...

Thanks, Henrik.
I had used similar code in the past with PBP2.x, but not identical, the crucial difference was that the prescaler of my earlier code was divide by 256. So didn't run out of ISR...

Trying to get an instant interrupt TMR0 counter to work on 16F873 with PBP3.0.
Similar code worked with PBP2.x, but now I'm banging my head on the wall.

Maybe just something simple I have...

Well....yes, I do. The application is a big sensor network, partially in a dangerous environment, where for safety reasons current has to be limited. Hence the "parasitic powering" from the 1-wire...

Thanks for your comments. The output will actually be 3-state: a passive pullup (1K resistor, equivalent to 5mA sink on sensors), active pull down (FET) and active pull up (FET) - the actives with an...

Using 18F67K22, I need a "stronger" OWOUT to drive a "heavy" 1-wire network.
So using 2 FETs, in a modified version of Maxim's AN244.

This means that to be able to use the PBP OWOUT command to...

This post should maybe have been put in the "wish list" forum. But I am hoping for a quicker result in this forum!

Using 18F87K22 (or 18F67K22) in a temperature logger application, with multiple...

Thanks for the suggestions, Skimask and SteveB.
I'll try your code, Skimask, and see if it works. Would it save any code space on the PIC (compared to my original code?)

The application logs data...

First post from a newbie!

I'm working on a logger (16f873a). To save external EEPROM space, the 10 bytes data from RTC, sensors etc are compressed to an 8-byte array that is sent (byte by byte) to...