## 4.7.10 Adding New Devices to the Port

Adding support for a new 16 bit PIC MCU requires the following steps:

1. Create picDEVICE.c and picDEVICE.h from pDEVICE.inc using
   perl /path/to/sdcc/support/scripts/inc2h-pic16.pl \
   /path/to/gputils/header/pDEVICE.inc
2. mv picDEVICE.h /path/to/sdcc/device/non-free/include/pic16
3. mv picDEVICE.c /path/to/sdcc/device/non-free/lib/pic16/libdev
4. Either

   1. add the new device to /path/to/sdcc/device/lib/pic16/libio/*.ignore to suppress building any of the I/O libraries for the new device4.3, or
   2. add the device (family) to /path/to/sdcc/support/scripts/pic18fam-h-gen.pl to assign I/O styles, run the pic18fam-h-gen.pl script to generate pic18fam.h.gen, replace your existing pic18fam.h with the generated file, and (if required) implement new I/O styles in /path/to/sdcc/device/include/pic16/{adc,i2c,usart}.h and /path/to/sdcc/device/lib/pic16/libio/*/*.
5. Edit /path/to/sdcc/device/include/pic16/pic18fregs.h
   The file format is self-explanatory, just add
   #elif defined(picDEVICE)
   # include <picDEVICE.h>
   at the right place (keep the file sorted, please).
6. Edit /path/to/sdcc/device/include/pic16devices.txt
   Copy and modify an existing entry or create a new one and insert it at the correct place (keep the file sorted, please).
7. ( cd /path/to/sdcc/device/non-free/lib/pic16 && sh update.sh )
8. Recompile the pic16 libraries as described in 4.7.9 or just configure and build sdcc again from scratch (recommended).