MCU assembly language-CodePudding

MOV R0, # 00 h
LOOP:...
DJNZ R0, LOOP
Why R0 is 0, can also perform loop 256 times

CodePudding user response:

Dear bosses, small white

CodePudding user response:

DJNZ R0, LOOP
Is judgment R0 is equal to 0 after the jump, R0-1
Now R0=0
0-1=255 (8) is not equal to zero, to minus 256 times before he is 0
Circular 256 nothing wrong,

CodePudding user response:

FPGA reference 2 floor?????? Response:

DJNZ R0, LOOP
Is judgment R0 is equal to 0 after the jump, R0-1
Now R0=0
0-1=255 (8) is not equal to zero, to minus 256 times before he is 0
Circular 256 nothing wrong,

Who is this 0-1=255, this number is 0 ~ 255 in R0 is such a cycle, that is what you mean?

CodePudding user response:

So to understand

CodePudding user response:

The

FPGA reference 4 floor?????? Response:

so to understand

ORG 00 h
MOV. A, # 24 h
LOOP:
MOV P1, # 01 h
LCALL DELAY
CJNE A, # 65 h, LOOP1
LOOP1: MOV P1, # 00 h
LCALL DELAY
CJNE A, # 65 h, LOOP
DELAY:

MOV R7, # 250
L2: MOV R6, # 250
L1: DJNZ R6, L1
DJNZ R7, L2
RET
END
Hello, can you help to look at again, I this circulate two leds light where the program is wrong in the

CodePudding user response:

For help, small white online, etc

CodePudding user response:

Understand understand, understand understand

CodePudding user response:

Code more disorderly, simply look at the code, though more organs in some places, but should be able to perform, you step down, can understand a lot of things, in the debugging

CodePudding user response:

references in the fifth floor wave small little dragon reply:

Quote: FPGA reference 4 floor?????? Response:
so to understand

ORG 00 h
MOV. A, # 24 h
LOOP:
MOV P1, # 01 h
LCALL DELAY
CJNE A, # 65 h, LOOP1
LOOP1: MOV P1, # 00 h
LCALL DELAY
CJNE A, # 65 h, LOOP
DELAY:

MOV R7, # 250
L2: MOV R6, # 250
L1: DJNZ R6, L1
DJNZ R7, L2
RET
END
Hello, can you help to look at again, I this circulate two leds light where the program is wrong in the

What phenomenon? There is only one light out? Twice to P1 assignment, only changed the state of a lamp,

CodePudding user response:

references 9 f xuyaosong response:

Quote: refer to fifth floor small waves, little dragon response:

The
Quote: FPGA reference 4 floor?????? Response:
so to understand

ORG 00 h
MOV. A, # 24 h
LOOP:
MOV P1, # 01 h
LCALL DELAY
CJNE A, # 65 h, LOOP1
LOOP1: MOV P1, # 00 h
LCALL DELAY
CJNE A, # 65 h, LOOP
DELAY:

MOV R7, # 250
L2: MOV R6, # 250
L1: DJNZ R6, L1
DJNZ R7, L2
RET
END
Hello, can you help to look at again, I this circulate two leds light where the program is wrong in the

What phenomenon? There is only one light out? Twice to P1 assignment, only changed the state of a lamp,

I figure is to use an interface to control two leds, make two leds flashing out

CodePudding user response:

Find someone to write program of the hardware is stc12c5024ad hardware, 2 slices ready with 22.1184 crystals with hc244 do 12 road input a 64 - bit dial the code switch do address input 4 tpic6b595 2 set of output a 485 and Siemens plc200 do credit to PLC program written 12 road by n address input count alarm display