How to use the instruction MOV C, P1.1? There is no instruction MOV C, XX in the 51 assembly instruction table.

一沙一世

How to use the instruction MOV C, P1.1? There is no instruction MOV C, XX in the 51 assembly instruction table. [Copy link]

 

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MOV C, P1.1; Read the level on the P1.1 pin

How to use the instruction MOV C, P1.1? There is no instruction MOV C, XX in the 51 assembly instruction table?

maychang

『MOV C , P1.1 Usage of this instruction』

That's how it is used.

maychang

"There is no MOV A, XX instruction in the 51 assembly instruction table?"

There is such an instruction.

Read the book carefully.

一沙一世

maychang posted on 2022-7-8 07:37 "There is no MOV A, XX instruction in the 51 assembly instruction table? 】 There is such an instruction. Read the book carefully.

Wrong question, there is no MOV C , XX instruction in the 51 assembly instruction table?

秦天qintian0303

Yishayishi published on 2022-7-8 08:41 Wrong question, there is no MOV C, XX instruction in the 51 assembly instruction table?

This should be the most common MOV instruction, is there anything special about it?

bigbat

Bit transfer instruction MOV C, BIT, bit transfer instruction

Don't ask about everything. Read a few days first.

maychang

Yishayishi posted on 2022-7-8 08:41 Wrong question, there is no MOV C, XX instruction in the 51 assembly instruction table?

"There is no MOV C , XX instruction in the 51 assembly instruction table ?"

Yes. The arrow in the picture below points to such a command.

maychang

Yishayishi posted on 2022-7-8 08:41 Wrong question, there is no MOV C, XX instruction in the 51 assembly instruction table?

"There is no MOV C, XX instruction in the 51 assembly instruction table?"

Bigbat on the 6th floor is right: read a few days first.

maychang

Yishayishi posted on 2022-7-8 08:41 Wrong question, there is no MOV C, XX instruction in the 51 assembly instruction table?

"There is no MOV C, XX instruction in the 51 assembly instruction table?"

I doubt whether you have read the 51 assembly instruction set in its entirety.

damiaa

Bit addressing, the operand is the bit address:

for example:

SETB P1.1 ; Set P1.1 to 1

CLR P1.1

MOV 32H, C; 32H←carry bit CY

MOV C, P1.1; bit transfer instruction: MOV C, bit

; P1.1 bit address is 91H

; You can query the relevant chapters of the stc8051 series microcontroller reference manual: 8051 bit-addressable data registers

; Check the bit operation instruction and bit transfer instruction again

; The host should read the book carefully. Come on.

一沙一世

Thank you very much.

wsmysyn

bigbat posted on 2022-7-8 09:08 Bit transfer instruction MOV C, BIT, bit transfer instruction Don't ask everything, read a few days of books first.

I treat others as assistants. I am too lazy to read books or think. I doubt whether I can learn well.

一沙一世

wsmysyn posted on 2022-7-8 10:03 I treat others as assistants, I am too lazy to read books, too lazy to think. . . Can I learn well? I doubt it

Thanks.

suncat

The understanding of assembly instructions is not thorough enough. It is best to have a deep understanding of each instruction, including what kind of instruction it is, how the data changes and is transferred, which addresses are involved, etc. It is recommended to understand the working principle of the microcontroller.

starcat123

I hope there are more posts like this that I can answer, haha

I thought there was something wrong with the grammar, but it turns out there was nothing wrong.

BTW, if it is a C51 program, that bit should be written as P1^1, otherwise the compiler will not recognize it.