关于at29c040的驱动，包括对该芯片的读写和擦除。还提供了该ic驱动电路-at29c040 on the drive, including a chip on reading, writing and erasure. Also provided by the drive circuit ic

at29c040控制，自己编写，很好用的，能实现各种功能-at29c040 control, write your own, well used, can achieve a variety of functions