Abstract: In the measurement and control systems often need to capture analog signals, sometimes the number of input channels is large, so need time-sharing in collection.signal acquisition process is the same as computer-controlled A/D chip for analog-digital conversion process, collecting the results of digital reading to the computer for processing.A term no doubt that it’s a very important aspect for measurement and control system that how to collect fast, accurate and reliable.
The design is completed acquisition system to gather voltage. The system kernel-based on microcontroller, using SPI communicate mode. 8-channel A / D conversion chip voltage measurements, showed that the voltage acquisition system. Including design the hardware circuit and the writing of main software procedure.
Keyword: SPI; LED display; Multi-voltage collection; Single-chip Mcro-computer
