Minimum support for pic rs232 interface.
void rs232_init()
Configures rs232 interface in polling mode. Provides 9600 bauds communications at 16Mhz. Source code must be modified for other speeds
void rs232_putchar(char c)
Sends character c to rs232 interface when this one becomes available.
char rs232_getchar()
Waits for a character, and returns it when available. Can indefinitly block.