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8251串行通信

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
;操作键盘键入要发送的键值屏幕显示其值和接收回来加三后的值判ESC退出
delay
MACRO
;调用时直接用宏名 delay
LOCAL d0
MOV CX,0ffffh
;初值越大越好 0ffffh
d0: ...
[串行通信8051/8253]微机原理实验14

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+2B8H
DATA
SEGMENT
RUN DB
'INPUT:',0DH,0AH,'$'
ERR DB
'ERROR!',0DH,0AH,'$'
OVE DB
'OVER!',0DH,0AH,'$'
D...