In this paper, the standard of the serial-port was studied, and how to realize the communication between serial-ports was also studied, and the rules and protocol of communication was designed.
The receiving part of the measure instrument has complex function and lots of processing data, especially needs two serial-ports to receive and transmit data.
The aim was realized by using new type single chip, ATMEGAL128. Introduced interface of the both and how to realize the two serial-ports function by a example.
A distributed oil-well production monitoring system is designed based on GSM short message service (SMS),a structural diagram of hardware is also provided. In light of actural demands,an expanded circuit for serial-ports used for single-chip computers is designed and a flow chart for serial-port communication program is provided.
Real time data acquisition, processing and storage are difficult in some places that lack alternating-current power supply to micro-computers. The portable computer is small in size, light in weight and powered by battery, and is suitable for some special cases. However, many portable computers has no bus slot, and the normal interface circuit board can not be used for real time data acquisition and processing. Parallel and serial ports of portable 昪omputer are used as signal channels for real t...
For the application of IBM-PC based SCADA system in power network, the paper introduces an Intelligent Controller (IC) based on IBM-PC personal computer. The Intelligent Controller (IC) contains an Intel 8086 CPU , 64K RAM and 64K EPROM. This microcomputer controls sixteen serial communication channels, pre-processes and transfers data between the IBM -PC and serial ports. The transfer of command , status message and data packets is performed through a window structure in IC module which i...
Reliability is the most important requirement of the microcomputer relaying system.It is the first time that 8098 one-chip computer and VFC data aCquisition systemare combined into a general high reliable multi-microcomputer relaying hardware system.The following advantages are obtained f Busses limited in a single board,two stage adiministration by serial ports,digital system with no relation to analog system in electricity,simple construction and high speed.