Pic to pic UART data Transfer

[Ttelmah]

Combining nibbles into bytes is easy:

[gaugeguy]

Shouldn't that be :
combined = (A*0xF) | ((B &0xF) << 4);

It seems that 0x0F & 0xF0 would result in 0 but I might be missing something.

[Ttelmah]

No. It should be:

combined = (A & 0xF) | ((B & 0xF) << 4);

Two typing errors, you only spotted one....

A & 0xF gives the low 4 bits of A.

Then B & 0F gives the low 4 bits of B

These are then rotated left 4 times.

On the PIC 16 & 18, you can actually use:

combined = (A&0xF) | swap(B &0xF);

This uses the internal swap instruction that swaps the high and low
nibbles in a single instruction, while the rotation takes four instructions.

This doesn't exist on the DsPIC's.

[CaptainOnedin]

Thanks alot you guys all!

Finally i figured out it. There is only one thing waiting to solve. Why IOC doesn't trigger with UART signal? I'll try all pins for it when i free.

I'm grateful to you guys.