Decoding variable into 4 digits of BCD, are there simple ways to this?

[Dave]

It all depends on how the hardware is configured. Is the design optimized for minimal code? With out a schematic it's hard to say...

[CuriousOne]

Well, there is no hardware yet I plan to use PIC16F887. The modules itself have A-B-C-D inputs of CD4543BE connected in paralel, and latch pins are also available on connector.

[CuriousOne]

If you mean hooking up A to PORTC.0, B to PORTC.1, C to PORTC.2 and D to PORTC.3, to be able to directly address them, then yes, I can do that.

[Dave]

Schematic...... Not some wild a** guess... Definitive schematic Please...

[CuriousOne]

Schematic of what?

[CuriousOne]

Here is simple counter code I've made. It just counts from 0 to 99. But it is far from perfection.

marcato:
tato=0
FOR KAKO=0 TO 99
XAXO=KAKO DIG 0
high latch 'enable write ones
low latch2 'disable write tens
gosub decoder 'display ones
if xaxo=0 and kako dig 1<>0 then 'if count is above 10
low latch 'disable ones
high latch2 'enable tens
'tato=tato+1
xaxo=kako dig 1
gosub decoder
xaxo=0
endif

if xaxo=0 and kako dig 1=0 then     'reset leading 0
low latch
high latch2
xaxo=0
gosub decoder
endif

PAUSE 300
NEXT 
goto marcato
END

decoder:
IF XAXO=0 THEN GOSUB ZERO 
IF XAXO=1 THEN GOSUB ONE
IF XAXO=2 THEN GOSUB TWO
IF XAXO=3 THEN GOSUB THREE
IF XAXO=4 THEN GOSUB FOUR
IF XAXO=5 THEN GOSUB FIVE
IF XAXO=6 THEN GOSUB SIX
IF XAXO=7 THEN GOSUB SEVEN
IF XAXO=8 THEN GOSUB EIGHT
IF XAXO=9 THEN GOSUB NINE
return

ZERO:
LOW A: LOW B: LOW C: LOW D
RETURN
ONE:
HIGH A: LOW B: LOW C: LOW D
RETURN
TWO:
LOW A: HIGH B: LOW C: LOW D
RETURN
THREE:
HIGH A: HIGH B: LOW C: LOW D
RETURN
FOUR:
HIGH C: LOW A: LOW B: LOW D
RETURN
FIVE:
HIGH C: HIGH A: LOW B: LOW D
RETURN
SIX:
HIGH C: HIGH B: LOW A: LOW D
RETURN
SEVEN:
HIGH A: HIGH B: HIGH C: LOW D
RETURN
EIGHT:
HIGH D: LOW A: LOW B: LOW C
RETURN
NINE:
HIGH D: HIGH A: LOW B: LOW C
RETURN

[Charlie]

Choose a port (A,B, or C). Connect the low 4 pins of the port to carry the number you want to display and connect those to the data pins of the CD4543BE. Then connect the 4 pins of the high byte to the latches. to write "2" to the first digit, send "12" to the port. to write 9 to the second digit send "29" to the port. Write 6 to the 3rd port with "46" and so on.