Your write system call will be interrupted by the bus error signal SIGBUS, because you performed a bad memory access.

此时write系统调用会被进程接收到的SIGBUS信号中断，因为当前进程访问了非法内存地址。

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The way how to read and write the large file of signal was also given, which will use only a litter memory.

同时，还给出了一个占用内存资源较少的大容量信号文件的读写方法。

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The system select W78LE516 MCU and CPLD to construct the control circuit and use quickly read and write low power consumption, low-voltage external data memory CF card to save the signal.

系统选w 78le516单片机和CPLD来构造控制电路，用读写速度快、功耗低的低电压外部数据存储器CF卡存储采集完的信号。

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