SONG Chao, WANG Rui-guang, FENG Ying-qiao. Display Calibration Coefficient Configuration System Used in LED Panel[J]. , 2013,28(3): 392-397 DOI: 10.3788/YJYXS20132803.0392.
To effectively write and read the calibration coefficients used in LED panel display control system
a display calibration coefficient configuration system based on USB interface and FPGA was developed. Firstly
the serial flash and its application in LED display systems were introduced. Next
an electrical circuit is built
including a FPGA chip and a USB peripheral controller chip. Finally several programs were developed
including a USB firmware
a PC user program and a configuration program for the FPGA. Experiments show that the calibration coefficients can be correctly written and read with this system. Each sector of the flash can be erased in 0.6 s. The data can be written in 2.3 Mbit/s and read in nearly 30 Mbit/s.This system is easy to use
and it can take an important role in the calibration coefficients operation of the LED panel display control system.
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references
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