Need help converting a 4 bit binary number to 4 separate values

[HenrikOlsson]

Hi,
Here's a couple of ideas:

Value VAR BYTE
A VAR Value.0
B VAR Value.1
C VAR Value.2
D VAR Value.3

A,B,C,D will then be treated as BIT variables which may or may not work for your intended purposes. If it doesn't then perhaps:

Value VAR BYTE
A VAR BYTE
B VAR BYTE
C VAR BYTE
D VAR BYTE

Convert:
  A = (Value & %00000001)                     ' A will be either 0 or 1
  B = (Value & %00000010) >> 1
  C = (Value & %00000100) >> 2
  D = (Value & %00001000) >> 3
RETURN

If you're writing to a display and what it's actually looking for is the ASCII representation of the numerical digit '1' (instead of the binary value 1) then just add 48 to the value:

Convert:
  A = (Value & %00000001) + 48              ' A will be either 48 ('0') or 49 ('1')
  B = ((Value & %00000010) >> 1) + 48
  C = ((Value & %00000100) >> 2) + 48
  D = ((Value & %00001000) >> 3) + 48
RETURN

/Henrik.

[Heckler]

Thanks Henrik,

I'll give those a try.

When I get this working it will have...

• 8 digit 7-segment display of 8 bit binary number in the form of 1's and 0's
• 8 individual LED's to represent an 8 bit binary number in the form of High and LOW (on/off)
• 2 digit alphanumeric display to represent Hex number
• 4x20 LCD using BIG digits to display Decimal number

All controlled by a 16F690.

Will count up/down from 0-255
Each of the above listed display formats will show the same number in a different way.
A POT will increase/decrease/stop counting speed
2 buttons to change counting direction or single count when pot is turned all the way to stop.

My intention is to have a way to show the same number in DEC / HEX / BIN so that students can see the relationship between the different number formats.
Oh Yeah, and to have something sort of Rube Goldberg-ish and kind of geeky to spark interest in electronics and programming.

I'll try and post the code and a video when I get it finished.

thanks