High-reliability embedded man-machine interface and realizing method thereof

Abstract

The invention relates to a high-reliability man-machine interface of an embedded system and a realizing method of the man-machine interface. A novel method of the man-machine interface of the embedded system is achieved by adopting a Flash storage unit and a hardware access module and matching with a DMA (direct memory access) controller. By using the method, an access process, a calculation process and a drawing process for the graphic data of the interface in a man-machine interface realizing technique are separated from the operation of a CPU (central processing unit), and are achieved by a high-speed logic circuit; the CPU only needs to send out an interface drawing instruction, the intermediate process of drawing the interface is not necessary to be intervened; and the DMA controller of the high-speed logic circuit and the hardware access module directly access a storage unit and display a storage area according to the drawing instruction, so as to carry out the direct access of the graphic data and the calculation of interface drawing. By using the man-machine interface and the realizing method, the high-speed and independent drawing of a graph of the man-machine interface is achieved, and the purpose that a graphic calculation process and a drawing process basically do not occupy the time of the CPU is achieved, so that more resources of the CPU are saved for the embedded system, and the reliability of the embedded system is obviously improved.

Description

technical field [0001] The invention relates to a high-reliability embedded system man-machine interface and a realization method thereof. Background technique [0002] The human-computer interaction interface in traditional embedded systems is implemented in pure software graphics mode. Due to the limited capabilities of the embedded system itself, it does not have an independent graphics processor system, resulting in embedded systems that either work at low CPU usage but display Text mode with rough effects, or work in graphics mode with good display effect but high CPU usage. However, the high CPU occupancy rate greatly affects the real-time performance of the embedded system. For applications with certain real-time requirements and certain calculation requirements, the reliability of the embedded system is obviously greatly reduced. [0003] Embedded systems often have certain calculation requirements, and some applications even have a large amount of calculations, whi...

AI Technical Summary

Problems solved by technology

[0002] The human-computer interaction interface in traditional embedded systems is implemented in pure software graphics mode. Due to the limited capabilities of the embedded system itself, it does not have an independent graphics processor system, resulting in embedded systems that either work at low CPU usage but display Text mode with rough effects, or work in graphics mode with good display effect but high CPU usage

The high CPU occupancy rate greatly affects the real-time performance of the embedded system. For applications with certain real-time requirements and certain calculation requirements, the reliability of the embedded system is obviously greatly reduced.

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