MICROPROCESSOR-BASED REMOTE DATA ACQUISITION SYSTEM WITH AUTOMATIC BAUD-RATE DETECTION

A Microprocessor-Based Remote Data Acquisition System with Automatic Baud-Rate Detection has been presented in this paper. The implementation featured an Intel 8085 Microprocessor as the controller and the 8251A Universal Synchronous and Asynchronous Receiver / Transmitter (USART) as a Programmable Communication Interface (PCI). Both hardware and Software aspects were covered and the technique for determining automatically, the baud-rate of a distant peripheral when that peripheral sends a space character, is also detailed in this presentation. This means that this data acquisition system always responds with the correct baud-rate when interacting with a distant data source and this makes for accurate data communication. Input / Output Multiplexing was featured to enable the data acquisition system cope with a variety of peripheral devices and an opto-coupler-based novel approach to peripheral device selection was used in the implementation.