ruilog

Published : 2004-12-08 Categories : School Tags : 8251 Serial Communication

;8251串行通信用8251 8253 clk0接1M
;宏定义必须放在end main 以外必须放在程序开头在end main后不行
;用equ定义8251 8253 地址
;操作键盘键入要...

Published : 2004-11-30 Categories : School Tags : 8051 8253 Serial Communication

IOPORT
EQU
0DC00H-280H
C53
EQU
IOPORT+283H
T53
EQU
IOPORT+280H
C51
EQU
IOPORT+2B9H
D51
EQU
IOPORT+2B...