基于CPLD的公共汽车智能语音报站系统

传统的公共汽车语音报站系统通常采用微处理器进行控制,其缺点是可靠性低、维护和升级不方便.为了解决这些问题,介绍了采用复杂可编程逻辑器件(CPLD)和语音芯片ISD2560组成的智能语音报站系统,分析了设计原理.由于CPLD的JTAG在系统编程能力并且充分利用了CPLD内部资源,所有控制逻辑电路和用于扩充LED显示的串行通信接口电路均由CPLD的内部硬件电路完成,不需微处理器,因此系统硬件电路简单、调试和升级方便、可靠性高,实用性强.

Intelligent Sound Broadcast System of Bus Based on CPLD

The traditional sound broadcast system of bus makes use of MPU. It's shortcoming is have lower dependability, at the same time the maintenance and upgrade is difficult. In order to solve these problems, an intelligent sound broadcast system of bus makes use of Complex Programmable Logic Device(CPLD) and sound chip ISD2560 is introduced, and the principle of design is analysed. Because of the ability of In System Programmability of CPLD's JTAG, and take full advantage of the resource in CPLD, this system have no use for MPU. So, the hard circuit of this system is simple, and the system is easy to debug, upgrade and has very high dependability and better practicability.