STM8S

debruyne.marc · ‎2012-10-22

Posted on October 22, 2012 at 12:14

hello,

please is there a sort of stm8s assembly language available who convert a 16 bit binary to 5 bcd code

many thanks

marc debruyne

fggnrc2 · ‎2012-10-22

Posted on October 22, 2012 at 14:24

Marc,

here is the code I use to compute the ASCII representation of an unsigned 16 bit quantity:

.PrintU16

PUSHW X

LDW Y,#10000

DIVW X,Y

LD A,XL

ADD A,#'0'

LDW X,Y

LDW Y,#1000

DIVW X,Y

SWAPW X

LDW (1,SP),X

LDW X,Y

LDW Y,#100

DIVW X,Y

ADDW X,(1,SP)

ADDW X,#'00'

LDW (1,SP),X

LDW X,Y

LDW Y,#10

DIVW X,Y

PUSH A

LD A,XL

LD YH,A

POP A

ADDW Y,#'00'

POPW X

RET

The caller must store in the X register the quantity to convert, while on exit the registers {A,X,Y} contain its ASCII representation.

I hope you'll find it useful.

Regards

EtaPhi

klaasdc · ‎2012-10-22

Posted on October 22, 2012 at 14:42

No asm, but I have a double dabble C implementation here

https://sites.google.com/site/klaasdc/stm8s-projects/16bit-to-bcd-conversion

It can probably be done better, but it's what I needed at the time. Maybe it's useful for you.

debruyne.marc · ‎2012-10-22

Posted on October 22, 2012 at 21:19

hello sir,

many thanks, i have just try the program and its working very well;

i must you wish ,youre a clever man.

i could not find it, have search a lot, and tryed to convert from different processors, but with no result.so i have tryed the last chance to come to this forum.

congratulations