Problem with Tiny Bootloader - PIC16F1938

reash · Joined: 17 Sep 2007 Posts: 8

Hello,

Has anyone tried using the PIC16F1938 with the Tiny Bootloader? I've been successfully using it with code compiled with the CCS compiler for the PIC16F886 for years. Now we need to migrate to the PIC16F1938 for more memory, yet same package, pinouts, etc. I got the PIC/bootloader to talk with the Tiny Bootloader interface, but I get a warning:

Connected to \\.\COM4 at 9600
HEX: 6 days old, INHX32,16Fcode+cfg, total=13554 bytes.
Searching for PIC ...
Found:16F 1938
WARNING: PCLATH not fully initialised before GOTO! ... sucessfully repaired.,
WRITE OK at 9:00, time:26.752 sec

It says it writes ok there at the end, but if read back the contents of the PIC's program memory, it is definitely NOT ok. Most of the memory is still empty, with random locations programmed with random code. Anyone have any thoughts on this?

Thanks!
Ryan

reash · Joined: 17 Sep 2007 Posts: 8

Well, now I have it writing some correct code, but only 1 block of 8 words for every 32 words of memory. So 8 good words, then 24 words of blank memory, then another 8 good words. So it's only writing every 4th memory block. Still get that warning, too.

reash · Joined: 17 Sep 2007 Posts: 8

I got it all working now for the PIC16F1938. Lots of messing around, but it finally works!