ex14_1.lst

MAX232的串口的驱动

A51 MACRO ASSEMBLER  EX14_1                                                               02/05/2004 09:59:39 PAGE     1


MACRO ASSEMBLER A51 V7.08a
OBJECT MODULE PLACED IN EX14_1.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE EX14_1.A51 SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

0000                   1     ORG     0000H
0000 0200F0            2     LJMP    Main
00F0                   3     ORG     00F0H
00F0                   4     Main: 
00F0 758160            5             MOV             SP,#60H                 ;给堆栈指针赋初值
00F3 758920            6             MOV             TMOD,#20H               ;设置T1为方式2
00F6 758DFD            7             MOV             TH1,#0FDH               ;设置波特率为9600
00F9 758BFD            8             MOV             TL1,#0FDH
00FC 759850            9             MOV             SCON,#50H               ;设置串口位方式1
00FF 758700           10             MOV             PCON,#00H
0102 D28E             11             SETB            TR1                     ;定时器1开始计