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/* 程序详细功能介绍:
*当按下按键P3.3 ,AT89S51单片机产生“叮咚”声从P3.2端口输出
*程序设计方法
* 1. 我们用单片...
/* 程序详细功能介绍:
*当按下按键P3.3 ,AT89S51单片机产生“叮咚”声从P3.2端口输出
*程序设计方法
* 1. 我们用单片机实定时/计数器T0来产生700HZ和500HZ的频率,根据定时/计数器T0,我们取定时250us,
* 因此,700HZ的频率要经过3次250us的定时,而500HZ的频率要经过4次250us的定时。
* 2. 在设计过程,只有当按下SP1之后,才启动T0开始工作,当T0工作完毕,回到最初状态。
* 3. “叮”和“咚”声音各占用0.5秒,因此定时/计数器T0要完成0.5秒的定时,对于以250us为基准定时2000次才可以。
*/-/* Procedure detailed functional Introduction:* When pressing the button P3.3, AT89S51 Singlechip a
- 2023-01-12 02:35:03下载
- 积分:1
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描述
DESCRIPTION
===========
This example project shows how to use the IAR Embedded Workbench for ARM
to develop code for the Atmel AT91SAM9261 evaluation boards.
It shows basic use of parallel I/O, timer and the interrupt controller.
It starts by showing different patterns on the LED s separated by half second.
COMPATIBILITY
=============
The project is compatible with the AT91SAM9261-EK board.
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- 2022-08-03 17:23:22下载
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- 2023-08-19 07:15:03下载
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基于PIC单片机的DS18B20读写源程序,包括读18B20ROM和在单总线上挂多个18B20的读写和串口通讯程序...
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- 2022-03-06 09:14:04下载
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