picdem fs usb and sdcc/gputils

 Hello,

   I'm trying to use the board in subject with sdcc/gputils.

 I've modified the linker script so that the vectors
 are located at 0x800 .

 CODEPAGE   NAME=vectors    START=0x800          END=0x829          PROTECTED

 I've recompiled crt0i.c along with a small example,
 and compiled and linked them this way:

 sdcc -c -mpic16 -p18f2550 crt0i.c
 sdcc -c -mpic16 -p18f2550 toggle.c
 gplink -o toggle.hex -s 18f4550.lkr crt0i.o toggle.o pic18f2550.lib

 however, gplink places the reset vector at 0x0000
 because the crt0i.o object specifies a fixed address.

 I had to modify crt0i.c adding a 
 #pragma code _entry 0x800
 and removing the 0 after the __interrupt qualifier
 of the _entry function.

 It seems to work now, but I was wondering
 if this is the correct way to follow...

 

-- 

 Best regards,

 Alessandro Zummo,
  Tower Technologies - Turin, Italy

  http://www.towertech.it