com.h

sst89c54 isp program for user

#ifndef _COM__H
#define _COM__H

/////////////////////////////////////////
//CPU种类:12分频时钟周期
//定时器: T2定时器
//误差: 4.5%
//公式: 波特率= 晶振频率/(32*(65536 - [RCAP2H,RCAP2L]))
//CopyRight by YTH 2002.11.11
/////////////////////////////////////////
#define  Baud9600        6//误差:0
#define  Baud19200       8//误差:0
#define  Baud38400       9//误差:0
#define  Baud115200      11//误差:0


#define  COMM_TIMEOUT 20000



extern void InitComm(unsigned char Crystal);
extern unsigned char ReadComm(unsigned char *ch);
extern unsigned char WriteComm(unsigned char ch);
#endif