Wanting the computer technology forms two important branches in its developing process: The general-purpose calculator domain, now take Pc machine as representative, develops the magnanimous high speed value operation technology emphatically, but its control is limited; The embedded computer domain, now take the monolithic integrated circuit as representative, It both used monolithic integrated circuit's price to be low, the function was strong, antijamming ability strong, limited warm affable face merits and so on control, and using PC machine characteristics and so on operating system's high-quality user interface, multi-duties, automatic memory management. the monolithic integrated circuit and microcomputer's serial communication may make up the monolithic integrated circuit in the data processing aspect insufficiency with PC machine in control aspect being short.
This design mainly introduced how to realize between a microcomputer and a monolithic integrated circuit's serial communication. In the hardware design aspect, completes the monolithic integrated circuit TTL level with the MAX232 chip to the RS-232 bidirectional level transformation; Completes the data transmission which with 4 6 matrix form keyboards must demonstrate; With LED the nixietube demonstrated that receives data which and transmits. In the software design aspect, PC machine uses the VB language programming, uses a named Mscomm correspondence which VB provides to control to realize the serial port receiving and dispatching data; The monolithic integrated circuit aspect completes the data with the interrupt mode the receive and the transmission.
