山东全国大学生电子设计竞赛优秀作品选登（简易超市收银机）

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山东全国大学生电子设计竞赛优秀作品选登（简易超市收银机）
介绍电子设计竞赛中的优秀作品。
系统扩展了两块液晶显示屏、PS/2键盘、条形码扫描器、微打、SD卡等部件，利用大赛组委会指定的32位的ARM2138作为核心器件，能很好地完成条码输入，汉字输入，实现了4种销售和清单打印，测试效果好。系统利用小液晶屏实现了顾客总价显示，与凌阳单片机SPEC061A相结合实现了销售总价语音播放、自动开关钱箱的等扩展功能。
简易超市收银机
本设计以ARM2138为控制核心，实现了PS/2协议键盘输入、条形码信息输入、中英文打印；并具有温度测量、双液晶屏显示、大容量SD卡存储等功能；完成了题目中所有的基本要求和发挥要求，并具有湿度测量、语音识别与播放、自动开关钱箱等鲜明的特色。
系统采用EasyARM2138实验开发板为核心控制器，完成了简易超市收银机的各项功能要求。我们实现了按PS/2协议从键盘读入各种商品信息，从扫描仪读取条形码信息以及打印购物清单等收银机最基�功能。本系统的键盘支持全拼汉字、中英文以及数字输入，功能强大，性能稳定，打印机支持汉字打印，并可进一步打印商店名、单据流水号、实时时间等若干信息。用灵敏的数字温度传感器DS18B20完成温度测量，精确的日历时钟芯片PCF8563作为实时时钟源。同时我们用SD卡极大扩充了系统内存存储空间，可以充分满足存储1000个商品价目表以及2000条销售日志的要求。收银机的液晶显示采用LCM240128ZK液晶屏，可滚动显示扫描到的购物条目信息，并利用OCM4X8C液晶显示器来突出显示最后总价，方便顾客看到，使我们的设计作品更加成熟。此外，我们利用凌阳单片机SPCE061A强大的语音播放功能，增加收银机的语音播放特色。
关键词：
EasyARM2138 收银机 扫描仪 打印机 SD卡
Abstract :
This design realizes reading in information according to PS/2 keyboard and bar code information from scanner as well as printing in Chinese and English, measuring the temperature,displaying with double LCD screens and huge room for SD card storage is also included.This design achieves all of the requests such as the basic and the exertion segment,has its own bright characteristic,such as measuring the humidity, recognising and playing the sound,swtiching on and off cashbox automatically .
The system takes the EasyARM2138 experiment board as the core controller to complete the simple supermarket cash register each function request. It can realize the most basic functions of cash register ,such as reading in many kinds of sales’ information according to the PS/2 agreement from the keyboard and bar code information from scanner as well as printing shopping detailed list and so on. This system’s keyboard supports Chinese, English as well as digital input.The function is formidable and the performance is stable. The printer support Chinese printing, and may further print the store’s name, the bill number, the present time and so on. Use the accurate digital temperature sensor DS18B20 to report to survey the temperature. Use the precise calendar clock chip PCF8563 to be the real-time clock source. Simultaneously we used the SD card to expand the system’s memory storage space which enormously satisfy fully the space request of 1000 commodity price lists as well as 2000 shopping diary. Our cash register’s LCD screen is the LCM240128ZK. We make it roll the shopping clause information that the demonstration scans. The final total price is also displayed by the OCM4X8C. The convenient for customer to see the result causes our design work to be maturer. In addition, we make use of the SPCE061A’s formidable pronunciation broadcast function to improve the cash register’s pronunciation broadcast characteristics.
Keywords:
EasyARM2138 cash register scanner printer SD card

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