?? sys_init.lst
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C51 COMPILER V8.02 SYS_INIT 04/15/2009 18:08:21 PAGE 1
C51 COMPILER V8.02, COMPILATION OF MODULE SYS_INIT
OBJECT MODULE PLACED IN sys_init.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE sys_init.c BROWSE DEBUG OBJECTEXTEND
line level source
1 #include<c8051f020.h>
2 #define uint unsigned int
3
4 void sys_init()
5 {
6 1 uint i;
7 1 EA=0; //關閉看門狗
8 1 WDTCN=0xDE;
9 1 WDTCN=0xAD;
10 1 EA=1;
11 1 OSCXCN=0x67; //晶體振蕩器方式
12 1 for(i=0;i<256;i++); //等待振蕩器啟振
13 1 while(!(OSCXCN&0x80)); //等待晶體振蕩器穩定
14 1 OSCICN = 0x88; //選擇外部振蕩器為系統時鐘源并允許丟失時鐘檢測器
15 1 XBR0=0x00; //作用?
16 1 XBR1=0x00;
17 1 XBR2=0x40;
18 1 P0MDOUT=0x00;
19 1 P2MDOUT=0xff; //高電平輸出為推挽方式
20 1 P3MDOUT=0xff;
21 1 P74OUT =0x0f; //P4-P7腳設為推挽 作為輸出用
22 1 }
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 57 ----
CONSTANT SIZE = ---- ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = ---- ----
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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