200电话卡代拨器的设计

电子机电论文编号:JD188      字数:10963,页数:37        

   200代拨器
1.引     言 1
1.1 课题背景和目的 1
1.2 国内外研究现状 2
2. 设计任务与要求 4
3. 总体设计方案论证 4
3.1 总体设计思想 4
3.2 方案一 4
3.2.1 控制单元的选择与分析 4
3.2.2 编码，译码单元的选择与分析 5
3.2.3 存储单元的选择与分析 6
3.2.4  取电电路的选择与分析 8
3.3 方案二 9
3.3.1  控制单元的选择与分析 9
3.3.2  编码，译码单元的选择与分析 9
3.3.3  取电电路的选择与分析 10
3.4 方案的选择： 10
4.主要硬件电路分析 12
4.1 单片机控制电路 12
4.2 双音多频（DTMF）接收电路 13
4.3 双音多频（DTMF）发送电路 14
4.5 电源电路 16
5. 软件的设计与调试 16
5.1 总体设计思想 16
5.2 程序的设计 17
5.2.1 卡号调用部分 18
5.2.2  DTMF的写（发送）部分 18
5.2.3  DTMF的读（接收）部分 20
5.2.4 卡号存储部分 20
6. 系统的调试 20
6.1 硬件调试 20
6.2 软件调试 21
6.3 联机调试 21
7 设计总结及心得体会 22
7.1 结论及尚存在的问题 22
7.2 心得体会 22
参考文献 24
附录A、MT8880 管脚排列和内部寄存器介绍 26
附录B、图片收集 30
附录C、程序清单： 31

摘  要 　目前广泛使用的IP预付费卡给人们带来实惠的同时，也带来了麻烦。主要介绍一种200卡代拨器，实现用户摘机时自动拨打200（接入号）和3（服务号），帐号，密码；系统以单片计算机为核心，其主要硬件模块由微处理器AT89C2051、EEPROM24C02、双音多频收发器MT8880等组成。主要功能是代拨200卡号及防止电话被滥用。用户可通过本地电话机对本产品进行设置。本装置十分小巧, 电路简单,成本低廉，操作简单,扩展功能较强大；可以广泛的应用于家用电话或者其它固定电话上，使人们能够象使用直拨那样方便。关键词:代拨器,双音多频,I2C总线串口存储器，双音多频编解码摘  要　目前广泛使用的IP预付费卡给人们带来实惠的同时，也带来了麻烦。主要介绍一种200卡代拨器，实现用户摘机时自动拨打200（接入号）和3（服务号），帐号，密码；系统以单片计算机为核心，其主要硬件模块由微处理器AT89C2051、EEPROM24C02、双音多频收发器MT8880等组成。主要功能是代拨200卡号及防止电话被滥用。用户可通过本地电话机对本产品进行设置。本装置十分小巧, 电路简单,成本低廉，操作简单,扩展功能较强大；可以广泛的应用于家用电话或者其它固定电话上，使人们能够象使用直拨那样方便。关键词:代拨器,双音多频,I2C总线串口存储器，双音多频编解码 摘  要　目前广泛使用的IP预付费卡给人们带来实惠的同时，也带来了麻烦。主要介绍一种200卡代拨器，实现用户摘机时自动拨打200（接入号）和3（服务号），帐号，密码；系统以单片计算机为核心，其主要硬件模块由微处理器AT89C2051、EEPROM24C02、双音多频收发器MT8880等组成。主要功能是代拨200卡号及防止电话被滥用。用户可通过本地电话机对本产品进行设置。本装置十分小巧, 电路简单,成本低廉，操作简单,扩展功能较强大；可以广泛的应用于家用电话或者其它固定电话上，使人们能够象使用直拨那样方便。关键词:代拨器,双音多频,I2C总线串口存储器，双音多频编解码 
         

Abstract

  At present the widespread use IP pre-payment card brings materially beneficial at the same time to the people, also has brought the trouble. Mainly introduced one kind of 200 card generation dials, the realization user picks the machine-hour to dial 200 automatically (turning on number) and 3 (service number), account number, password; The system take the monolithic computer as a core, its main hardware module by microprocessor AT89C2051, EEPROM24C02, double sound multi-frequency transceiver MT8880 and so on is composed. The main function is the generation dials 200 card numbers and prevented the telephone is abused.The user may carry on the establishment through the local telephone to this product.This installment is extremely exquisite, the electric circuit is simple, the cost is inexpensive, the operation is simple, the expansion function is formidable; May the widespread application on the home use telephone or other fixed telephones, enables the people to use the direct dialing to be such convenient likely. Key words：The generation dials, the double sound multi-frequencies, the I2C main line serial port memory, the double sound multi-frequencies arrange the decoding          Abstract  At present the widespread use IP pre-payment card brings materially beneficial at the same time to the people, also has brought the trouble. Mainly introduced one kind of 200 card generation dials, the realization user picks the machine-hour to dial 200 automatically (turning on number) and 3 (service number), account number, password; The system take the monolithic computer as a core, its main hardware module by microprocessor AT89C2051, EEPROM24C02, double sound multi-frequency transceiver MT8880 and so on is composed. The main function is the generation dials 200 card numbers and prevented the telephone is abused.The user may carry on the establishment through the local telephone to this product.This installment is extremely exquisite, the electric circuit is simple, the cost is inexpensive, the operation is simple, the expansion function is formidable; May the widespread application on the home use telephone or other fixed telephones, enables the people to use the direct dialing to be such convenient likely. Key words：The generation dials, the double sound multi-frequencies, the I2C main line serial port memory, the double sound multi-frequencies arrange the decoding           Abstract  At present the widespread use IP pre-payment card brings materially beneficial at the same time to the people, also has brought the trouble. Mainly introduced one kind of 200 card generation dials, the realization user picks the machine-hour to dial 200 automatically (turning on number) and 3 (service number), account number, password; The system take the monolithic computer as a core, its main hardware module by microprocessor AT89C2051, EEPROM24C02, double sound multi-frequency transceiver MT8880 and so on is composed. The main function is the generation dials 200 card numbers and prevented the telephone is abused.The user may carry on the establishment through the local telephone to this product.This installment is extremely exquisite, the electric circuit is simple, the cost is inexpensive, the operation is simple, the expansion function is formidable; May the widespread application on the home use telephone or other fixed telephones, enables the people to use the direct dialing to be such convenient likely.

Key words：The generation dials, the double sound multi-frequencies, the I2C main line serial port memory, the double sound multi-frequencies arrange the decoding