Look at the above, these sentences will also help you to explain briefly:

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# Define uchar unsigned characters

This sentence has been redefined, that is, when the program encounters uchar at compile time, it is replaced by unsigned char.

# defineunt unsigned int is the same.

Unsigned means unsigned. If you have studied C language a little,

The Int type has 65535 bits, and the signed range is:

Int short shaping -32768 ~ 32767

Unsigned int unsigned short integer 0-65535;

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# The defined data port P2 is also redefined, and all data ports encountered during compilation are replaced by P2.

P2 is the interface of May 1 single chip microcomputer. If you don't know this, I suggest you read the basic book 5 1 first.

5 1 has four full-duplex io ports P0, P 1, P2 and P3, each with 8 bits.

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Sbit is a bit redefinition statement. When you encounter SCL at compile time, you will know that it is 4 bits of P0 port (P0^4).

It's all the same down there.

To learn about adxl345, please read my article.

/kai 9 1/item/fa60 c 630 b 6 12d 085 b 7 1 1 DBA 1

The program did not ask me again.