ARM Code Snippets:

RS232.c    -    UART module is for LPC2138/2148.  This driver is not interrupt driven. 

RS232.h    -    Header file for above module 

PWM.c    -    Philips (NXP) PWM driver for LPC2138/2148.  It can be used with interrupts, just uncomment the interrupt routine.

PWM.h    -    Header file for above module

PIC16/18 Code Snippets: