Multi-channel DMA control transmission device

Abstract

The invention provides a multi-channel DMA control transmission device. The multi-channel DMA control transmission device comprises a computer, a CPCI bus interface and a plurality of data transmission channels. The computer is in communication connection with one end of each of a plurality of data transmission channels through a CPCI bus interface, and the other end of each data transmission channel is connected with equipment. The data transmission channel comprises a bus bridging circuit, a lower computer, a demodulation AD acquisition circuit, an image data receiving circuit, an analog acquisition circuit and a clock source. The computer is in communication connection with the bus bridging circuit through a CPCI bus interface, the bus bridging circuit is in communication connection with the lower computer through a local bus, and the lower computer is electrically connected with the demodulation AD acquisition circuit, the image data receiving circuit, the analog acquisition circuit and the clock source. According to the invention, lower computer data can be rapidly uploaded to a computer. The test requirements of equipment in most spaceflight measurement and control systems are met, and the system has certain universality and expansibility, and is flexible in configuration and good in controllability.

Description

technical field [0001] The invention relates to the technical field of data processing, in particular to a multi-channel DMA control transmission device. Background technique [0002] The test device of aerospace measurement and control system has a wide range of applications in the field of aerospace engineering. With the increasing integration, miniaturization, and integration of spacecraft, more and more equipment is carried, and the data communication is also significantly increased. Therefore, the requirements for testing and monitoring related to spacecraft have also increased. [0003] At present, the test equipment used in aerospace systems is designed based on a certain equipment, which has a single function and complex testing, which greatly increases the workload of the design and the inadequacy of the test. Therefore, it is necessary to design a test device with strong comprehensiveness, high convenience, and good flexibility, so as to realize real-time data sto...

AI Technical Summary

Problems solved by technology

The existing CPCI bus uses a 32-bit parallel bus, and the bus bandwidth is shared between modules. The system clock of 33MHz is used, and the maximum transmission capacity is 133MBps. When multiple devices are connected, the problem of bus bandwidth preemption will occur, resulting in data It cannot be transmitted in real time, and cannot meet the needs of real-time transmission of complex multimedia data

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