serial.h

用于最新的PIC18系列型 此程序包括了读写函数

#ifndef _SERIAL_H_
#define _SERIAL_H_

#define BAUD 9600      
#define FOSC 4000000L
#define NINE 0     /* Use 9bit communication? FALSE=8bit */
#define OUTPUT 0
#define INPUT 1

#define DIVIDER ((int)(FOSC/(16UL * BAUD) -1))
#define HIGH_SPEED 1

#if NINE == 1
#define NINE_BITS 0x40
#else
#define NINE_BITS 0
#endif

#if HIGH_SPEED == 1
#define SPEED 0x4
#else
#define SPEED 0
#endif

void init_comms(void);
void putch(unsigned char);
unsigned char getch(void);
unsigned char getche(void);


#endif