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This article describes how to use AD to identify the user s keyboard input metho...
本文介绍了如何用AD识别用户输入的键盘的方法，较之点阵识别有其不可替代的优势；因为如果用4*4的话须消耗8个I/O口，而如果系统有AD功能的话就可能轻松解决了。
单片机8051F330发给ARM然后发给电脑。
其原理就是利用电阻的分压，按键时产生不同的电压，再用中断快速读取电压；然后对其进行编码，通过串口软件EASYARM在个人电脑里显示；经实验观察，效果还可以。 -This article describes how to use AD to identify the user s keyboard input methods, compared with dot-matrix recognition has its irreplaceable advantages because if we use 4* 4, then to be consumed eight I/O port, and if the system function in AD, then on may be easily resolved. Singlechip 8051F330 distributed computer and then distributed to ARM. Its principle is to use the sub-ballast resistor, when keys have different voltage, and then quickly read voltage interruption then encode, through the serial port software EASYARM in the personal computer display by experimental observation, the effect can also be.
- 2022-05-25 22:40:40下载
- 积分：1
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在大型通信系统（机架插板式）中多块单板通过TDM总线，利用HDLC协议实现内部通讯的源码...
在大型通信系统（机架插板式）中多块单板通过TDM总线，利用HDLC协议实现内部通讯的源码-in large communication system (Plug-rack), plus veneer through TDM bus, HDLC protocol using internal communications FOSS
- 2022-01-26 00:38:30下载
- 积分：1
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test_nandflash.c
test_nandflash.c -- test nandflash id-test_nandflash.c-- id test nandflash
- 2022-01-28 14:56:24下载
- 积分：1
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petroll泵检测电源三相蜂鸣器系统
检测电源的汽油泵三相蜂鸣器系统。
- 2023-03-27 01:40:04下载
- 积分：1
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基于s3c2410平台开发的程序，实现了mmu、clock、interrupt、uart等功能，对学习s3c2410，学习arm，学习bootloader有很大...
基于s3c2410平台开发的程序，实现了mmu、clock、interrupt、uart等功能，对学习s3c2410，学习arm，学习bootloader有很大帮助。-Based on S3C2410 platform development process, realize the mmu, clock, interrupt, uart and other functions, learning s3c2410, study arm, has great help learning bootloader.
- 2022-04-13 05:57:23下载
- 积分：1
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演示如何使用批量端点配对的EZ特征
demonstrate how to use the bulk endpoint pairing feature of the EZ-USB chip
- 2022-07-24 17:07:50下载
- 积分：1
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SD card read and write registers and data, debug the success of direct use.
读写SD卡寄存器和数据,调试成功,直接能用.-SD card read and write registers and data, debug the success of direct use.
- 2022-07-18 13:20:26下载
- 积分：1
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一个可以立即使用的嵌入式操作系统，已经在应用很稳定。具备实时性，支持设备扩充编程...
一个可以立即使用的嵌入式操作系统，已经在应用很稳定。具备实时性，支持设备扩充编程-an immediate use of embedded operating systems, the application has been very stable. With real-time, support equipment to expand programming
- 2022-07-11 15:08:53下载
- 积分：1
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波特率发生器的VHDL源码。适用于uart、spi、IIC
波特率发生器的VHDL源码。适用于uart、spi、IIC-Baud rate generator VHDL source code. Apply to uart, spi, IIC
- 2022-01-27 13:25:16下载
- 积分：1
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STM32 SPI互通信(DMA) V3.5
STM32 SPI互通信(DMA) V3.5 两个STM32的SPI接口通信，一个做从机，一个做主机，DMA方式，速度飞快。
- 2022-01-25 17:28:28下载
- 积分：1
