头件的中的#ifndef，这是一个很关键的东西。比如你有两个C文件，这两个C文件都include了同一个头文件。而编译时，这两个C文件要一同编译成一个可运行文件...

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用LPC2132驱动SPI接口FLASH的c驱动程序，调试完全通过-SPI interface with LPC2132 Driver FLASH

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