Description: In Altera' s Cyclone series FPGA development board interrupt key test procedures, interruption of hope to those who study the development of help for beginners. verilog prepared pio_key.v button is interrupted procedures, corresponding to the four keys, in accordance with any one key can send an interrupt keyint.c is prepared Nios of C procedures for detecting the interruption of keys, if the interruption is detected, will detect which button is depressed, thus the implementation of appropriate procedures!
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案件中断源程序（veriolog程序和Nios中的C程序）
.............................................\keyint.c
.............................................\pio_key.v
.............................................\说明.txt
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