A generalized liquid crystal screen touch switch matrix control card and its application method
A technology of switching matrix and LCD screen, applied in the field of satellite testing, can solve the problems of reliability, poor practicability, single communication interface, black box of remaining life of switching matrix, etc.
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[0048] like figure 1 As shown, it is a composition block diagram of a generalized liquid crystal screen touch switch matrix control card of the present invention, including: ARM embedded processor 1, FPGA2, touch liquid crystal screen 3, control panel button 4 drive circuit 5, feedback Acquisition circuit 6, E2PROM 7 and temperature measurement circuit 8.
[0049] In the specific implementation of the present invention, ARM embedded processor selects LPC2294 of NXP; FPGA selects XC3S700A-4FG484I of Xilinx. LPC2294 is mainly responsible for network port communication control, XC3700A has 372 IO interfaces, and is mainly responsible for the control of all RF switches, program-controlled attenuators and other RF devices in the switch matrix. The network chip adopts W5100, which supports network protocols such as TCP\IP and UDP, and supports a network rate of 100Mbps. FPGA uses 74lvc164245 (TTL) with ULN2003A (OC) chip as the driver circuit to control the programmable attenuator...
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