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PD243X Fiches technique(PDF) 5 Page - OSRAM GmbH

No de pièce PD243X
Description  Alphanumeric Programmable Display
Download  7 Pages
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Fabricant  OSRAM [OSRAM GmbH]
Site Internet  http://www.osram.com
Logo OSRAM - OSRAM GmbH

PD243X Fiches technique(HTML) 5 Page - OSRAM GmbH

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 2000 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA
Appnote 49
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
OSRAM Opto Semiconductors GmbH & Co. OHG • Regensburg, Germany
www.osram-os.com • +49-941-202-7178
5
May 31, 2000-14
Program listing
UDISP
’PD 2435 Display PROGRAM’
1
$TITLE (‘PD 2435 DISPLAY PROGRAM’)
2
$MOD515
3
$NOSYMBOLS
4
....
5
CSEG
6
$DEBUG
7
8
0000
9
ORG
00H
10
0000 02000C
11
LJMP
BEGIN
;Jump on reset
12
13
;
14
;
15
;
16
;
17
;
18
0003
19
ORG
03H
20
0003 C0E0
21
PUSH
ACC
0005 D2D5
22
SETB
F0
;Set flag for external interrupt
0007 D0E0
23
POP
ACC
0009 C289
24
CLR
IE0
000B 32
25
RETI
26
27
;
28
;
29
;
30
000C D282
31
BEGIN:
SETB
P3.2
;Set bit for INT0
000E 758110
32
MOV
SP,#10H
0011 75D800
33
MOV
ADCON, #00H
;Select analog channel 0
34
0014 C2D5
35
OPTS:
CLR
F0
;Clear flag 0
0016 7800
36
MOV
R3,#00H
;Character pointer in the message
0018 79FF
37
MOV
R1,#0FFH
;R1 used as a flag
001A 90F000
38
MOV
DPTR,#0F000H
;Control register of all displays
001D 7403
39
MOV
A,#03H
;Control word for display
001F F0
40
MOVX
@DPTR,A
0020 9000C2
41
MOV
DPTR,#(TEXT-1)
;Beginning of the text
0023 7820
42
MOV
R0,#20H
;Internal RAM location
0025 7D65
43
MOV
R5,#101
;A count for 101 characters
0027 7420
44
MOV
A,#20H
;ASCII for space
0029 F6
45
BLANK:
MOV
@R0,A
;Fill all locations with blank
002A 08
46
INC
R0
002B DDFC
47
DJNZ
R5, BLANK
48
002D 12006C
49
SHIF:
CALL
NEXTC
;Read the next character
0030 20D501
50
JB
F0,TEMP
;Check if the interrupt was raised
0033 0B
51
INC
R3
;If no interrupt
0034 7D65
52
TEMP:
MOV
R5,#101
;Character count in message
0036 7820
53
MOV
R0,#20H
;RAM location 20H
0038 20D506
54
JB
F0,REV0
003B C6
55
SHFT:
XCH
A,@R0
;If no interrupt
003C 08
56
INC
R0
;Add the character
003D DDFC
57
DJNZ
R5,SHFT
;To the top of the RAM buffer
003F 0158
58
AJMP
CONT0
0041 7421
59
REV0:
MOV
A,#21H
;If there is no interrupt
0043 2B
60
ADD
A,R3
;Offset for the RAM buffer
This is the interrupt subroutine for INTO. This is used to set a flag
which then indicates that the message needs to be rolled back.
MAIN PROGRAM


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