?? 蜂鳴器.lst
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C51 COMPILER V7.06 __鳴器 08/18/2008 18:00:47 PAGE 1
C51 COMPILER V7.06, COMPILATION OF MODULE __鳴器
OBJECT MODULE PLACED IN 蜂鳴器.OBJ
COMPILER INVOKED BY: d:\Keil2\C51\BIN\C51.EXE 蜂鳴器.c BROWSE DEBUG OBJECTEXTEND
stmt level source
1
2 /*copyright 2007,ShangHai HaoTun Electronic Technology co.,Ltd
3 *
4 *This sample is used for Speaker.
5 *
6 *write by Shifang 2007-4-23
7 *
8 *V1.1
9 */
10 #include<reg52.h>
11
12 sbit SPK=P1^2;//定義蜂鳴器端口
13
14
15 void delay(unsigned int cnt)//延時
16 {
17 1 while(--cnt);
18 1 }
19
20 main()
21 {
22 1 unsigned int i;
23 1 while(1)
24 1 {
25 2 for(i=0;i<200;i++)//喇叭發聲的時間循環,改變大小可以改變發聲時間長短
26 2 {
27 3 delay(80);//參數決定發聲的頻率,估算值
28 3 SPK=!SPK;
29 3 }
30 2 SPK=1; //喇叭停止工作,間歇的時間,可更改
31 2 delay(20000);
32 2
33 2 }
34 1 }
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 44 ----
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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