文件名称:led
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简单的led驱动,有利于新手教学,里面使用字符设备注册,还用了class类-The SC16C554B/554DB provides four levels of prioritized interrupts to minimize external
software interaction. The Interrupt Status Register (ISR) provides the user with four
interrupt status bits. Performing a read cycle on the ISR will provide
software interaction. The Interrupt Status Register (ISR) provides the user with four
interrupt status bits. Performing a read cycle on the ISR will provide
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led.c