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array question in Assembly 68HC11

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array question in Assembly 68HC11 A place for discussing programming languages not covered in specific forums such as Assembler, COBOL, etc. - you get the idea.

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  #1  
Old August 27th, 2004, 09:13 AM
esenlik esenlik is offline
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array question in Assembly 68HC11
Hello ppl!

I have question about arrays in assembly 68HC11.
I need to create an 8 byte array which holds my motor ids.
So I recieve this byte 'id' from serial port which is from (0-7). I want to use that id as an index, to get the value in 'motor' array.

Basicly I am trying to do this: MOTORID=MOTORARRY[MID]

I dont have too much experience in Motorola processor.


Here is what I did, and parts from the code & it compiles fine but does not work
-----------

Code:
-reserving space for it
MOTORARRY RMB	8		; stepper motor select array

-storing array values.
	LDAA	#%00000000
	STAA	SPMTRARY
	LDAA	#%00000001
	STAA	SPMTRARY+1
	LDAA	#%00000100
	STAA	SPMTRARY+2
	LDAA	#%00000101
	STAA	SPMTRARY+3
	LDAA	#%01000000	
	STAA	SPMTRARY+4
	LDAA	#%01000001
	STAA	SPMTRARY+5
	LDAA	#%01000100
	STAA	SPMTRARY+6
	LDAA	#%01000101
	STAA	SPMTRARY+7

-accessing part


	JSR	GETCHE		; this subroutine saves the value on Acc A.	
	STAA	MID		; stores A on to ID 
	
	LDD	MID
	ADDD	#MOTORARRY
	XGDX
	LDD	0,X
	STD	MOTORID


Anybody can point out where I did the mistake or any other/better suggestions creating this array and accessing it.

I would appreciate any help.

Thanks.
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  #2  
Old August 27th, 2004, 10:49 AM
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gt3_dk gt3_dk is offline
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Um... sorry if I can'thelp much... but here's what I think. I'm no assembly whiz but I used to do a bit of mips and when you wanted to read a byte or store a byte you needed a hiword offset and then another number from there.

So what you can do is use the MOTOARRY but not use the [] becuase I don't even know if those can be used to make arrays or something (I told you I sucked..) You put that as the base and hiword address and then you just add a numer to it.
Code:
    lbu $10, 0x0000($8)
    lbu $11, 0x0001($8)
    lbu $12, 0x0002($8)
    lbu $13, 0x0003($8)
    lbu $14, 0x0004($8)

In here the $* things are registers and this loads a byte from $8 (base address)+0x0001 (the number of bytes away from the address) and stores it into register $11.

So if you can get this sort of thing going that might be good enough.

By the way... what you builing???!? It sounds pretty cool and I wanted to get into electronics or robotics anyway...
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Old November 2nd, 2006, 10:19 PM
Jmartin732 Jmartin732 is offline
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I need help with simple assembly bubble sort program, needs to sort 10 numbers
I need help with assembly program to bubble sort 10 numbers

jmartin732

I have question about arrays in assembly 68HC11.
I need to create an 8 byte array which holds my motor ids.
So I recieve this byte 'id' from serial port which is from (0-7). I want to use that id as an index, to get the value in 'motor' array.

Basicly I am trying to do this: MOTORID=MOTORARRY[MID]

I dont have too much experience in Motorola processor.


Here is what I did, and parts from the code & it compiles fine but does not work
-----------

Code:
-reserving space for it
MOTORARRY RMB	8		; stepper motor select array

-storing array values.
	LDAA	#%00000000
	STAA	SPMTRARY
	LDAA	#%00000001
	STAA	SPMTRARY+1
	LDAA	#%00000100
	STAA	SPMTRARY+2
	LDAA	#%00000101
	STAA	SPMTRARY+3
	LDAA	#%01000000	
	STAA	SPMTRARY+4
	LDAA	#%01000001
	STAA	SPMTRARY+5
	LDAA	#%01000100
	STAA	SPMTRARY+6
	LDAA	#%01000101
	STAA	SPMTRARY+7

-accessing part


	JSR	GETCHE		; this subroutine saves the value on Acc A.	
	STAA	MID		; stores A on to ID 
	
	LDD	MID
	ADDD	#MOTORARRY
	XGDX
	LDD	0,X
	STD	MOTORID


Anybody can point out where I did the mistake or any other/better suggestions creating this array and accessing it.

I would appreciate any help.

Thanks.[/QUOTE]
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Dave Sinkula disagrees: Let sleeping threads lie. Read the date of the last post before replying.
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  #4  
Old February 12th, 2007, 12:44 AM
kalimantang kalimantang is offline
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copy array
Hello there!

i am a beginner of shadow11 programming..
Want to write a program to coppy 300 double-byte unsigned number from array1 to array2. The end of data in array1 marked as $FFFF. The data from array1 is coppy to array2 until marker found but if the marker not found all data go to array2.

Could anybody help me...?

Thank you
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salem disagrees: Yet another "me too" grave digger - not even on-topic
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