2nd hardware UART

[tumbleweed]

good catch Henrik.

I guess we can bodge this by editing the K42.lib file but then it won't work for K42 devices so, yeah... :-(

I wouldn't do that. There are a lot more differences between the K42 and the K83 than just the U2IF flag... the K83 should really have its own set of libs.

You can specify which library to use for a device in the *.pbpinc file.
For example PIC18F26K83.PBPINC specifies
LIBRARY "pbp_pic18FxxK42_Long"
LIBRARY "pbp_pic18FxxK42"

[HenrikOlsson]

Aah, right, now that you mention it I remember seeing that information somewhere - which turned out to be in post #8 in a thread on MeLabs forum. Things like this really should be in the manual.

Anyway, that means that we have a chance of fixing issues like these in case MeLabs won't. Thanks tumbleweed!

[rocket_troy]

Thanks Henrik,
As Tumbleweed said: good catch! Okay, it's probably a bit beyond my paygrade to fix, but at least that sheds some light on the root cause.

Cheers,

Troy

[Ioannis]

Charles promissed that he would try to fix any issues found with the exixting version of PBP.

Maybe you can report that to him or the melabs forum.

Ioannis

[rocket_troy]

Thanks Ioannis,
I'll endeavour to contact Charles and pass on the issue. As this is pretty much my go-to processor these days, it would be nice to have the issue fixed.

Cheers,

Troy

[Ioannis]

Then you may report back,

Ioannis

[rocket_troy]

good catch Henrik.


I wouldn't do that. There are a lot more differences between the K42 and the K83 than just the U2IF flag... the K83 should really have its own set of libs.

You can specify which library to use for a device in the *.pbpinc file.
For example PIC18F26K83.PBPINC specifies
LIBRARY "pbp_pic18FxxK42_Long"
LIBRARY "pbp_pic18FxxK42"

I've started email dialogue with Charles, but to this point raised by Tumbleweed: I will say I've used this processor a lot and I reckon I've used close to 90% of its peripheral functionality (without issue), so the K42 libraries must be very close to being a perfect match I would think.

edit: although on further reflection, a lot of that was done in a more direct (register access) sense.

Cheers,

Troy

[tumbleweed]

There are a few slight peripheral differences between the two, but most of the changes have to do with the location and layout of the interrupt bits in the various PIE, PIR, and IRP regs.

[rocket_troy]

There are a few slight peripheral differences between the two, but most of the changes have to do with the location and layout of the interrupt bits in the various PIE, PIR, and IRP regs.

Okay, thanks, that's good to know.

I've received some modified or new libraries from Charles with the required include files. Initial testing is showing no issues with transmitting on the 2nd UART. I've only cranked the baud up to 38400, but so far, so good. I only mentioned the 2nd UART issue to him, so I don't know how broadly he looked at the other interrupt registers with making the mods.

Troy

[Ioannis]

if it worked at 38400 then problem is solved. Speed is irrelevant to the issue of wrong FSRs.

I am pretty sure Charles won't object in posting the corrected library file(s) on the forum.

Ioannis

[rocket_troy]

PBP_TEST.zip

I think I've done this correctly. Thanks Charles for this.

Cheers,

Troy

[rocket_troy]

Oh, and special thanks again to Henrik for pinpointing the particular code. That helped a lot.

Troy