[Sdcc-user] stm8 sdas : variable problem

[<re...@re...>]

Hello

SDCC : stm8 3.4.1 #9068 (Sep  5 2014) (Linux)

I dont see the difference between this ( A and B ) :

I have _lcdchar   declared by :

.area OSEG
_varOne:
.ds	1
_lcdchar:
.db	1

.area CSEG

.
.which seems not working, at least the way variables
   are to mee in assembly ...
.

A)

;try write I                          ### this block doesnt work: prints 
"trash"

ldw	x, #0d05
call	delay_m

mov	_lcdchar, #0b01001001

ld	a,_lcdchar	; "I" upper "i" : ascii code in the hd44780
and	a,#0b11110000	; delete lower nib
or	a,#0b00000011	; put in that : data write + bkl ON
ld	PD_ODR, a	; #0b01000011
bset	PD_ODR, #3
bres	PD_ODR, #3
ldw	x, #0d5
call	delay_m
ld	a,_lcdchar	; "I" upper "i" : ascii code in the hd44780
swap	a
and	a,#0b11110000	; delete lower nib
or	a,#0b00000011	; put in that : data write + bkl ON
ld	PD_ODR, a
bset	PD_ODR, #3
bres	PD_ODR, #3


And that:

B)
;try write I                        ### this block writes a capital i .

ldw	x, #0d05
call	delay_m


ld	a,#0b01001001	; "I" upper "i" : ascii code in the hd44780
and	a,#0b11110000	; delete lower nib
or	a,#0b00000011	; put in that : data write + bkl ON
ld	PD_ODR, a	; #0b01000011
bset	PD_ODR, #3
bres	PD_ODR, #3
ldw	x, #0d5
call	delay_m
ld	a,#0b01001001	; "I" upper "i" : ascii code in the hd44780
swap	a
and	a,#0b11110000	; delete lower nib
or	a,#0b00000011	; put in that : data write + bkl ON
ld	PD_ODR, a
bset	PD_ODR, #3
bres	PD_ODR, #3






thnx again for stm8 support ! :)