Directly converting binary inputs into decimal?

Passerby

For example, if I have something like this:

a = 1
b = 0
c = 1
d = 0

a being number 8, 1010 = 10.

is there a code out there which helps converts these values?

cheers.

Mike Green

You can directly access the bits of a variable. Read the Basic Manual pages 81-91.

If you have a variable defined as a nibble (4 bits) called X, you can say:

X.bit3 = a
X.bit2 = b
X.bit1 = c
X.bit0 = d

At this point, X is 10.

You can also do: X = ((a << 1 + b) << 1 + c) << 1 + d

Passerby

x VAR Nib
 
a = 1
b = 0
c = 1
d = 0
 
x.bit3 = a
x.bit2 = b
x.bit1 = c
x.bit0 = d

Therefore, x would have the value of 10, right?

So, meaning that if the binary is an 8 bit value now, I'll just have to extend the coding to x.bit7 = value, and change the variable type to Byte? [noparse]:)[/noparse]

Post Edited (Passerby) : 3/5/2009 6:10:43 AM GMT

Tracy Allen

That's right.

x VAR byte
x.bit0=h
x.bit1=g
....
x.bit7=a

Where are you going with this? Your subject line is "directly converting binary INPUTs to decimal". It may be as easy as,

x = INL

That reads all 8 input pins, p0 to p7, directly into the variable x.

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Tracy Allen
www.emesystems.com

Passerby

Okay the basic idea of my work is that I will be implementing a phone with my basic stamp, which uses a "phone card" to dail the DTMF frequency out. There will be 2 places where·input will be possible, but I would like to filter it that only 1 input is allowed at a single time to avoid clashing of phone number. The·number buttons for the phone is using a push button switch, I can use the code such as this?

/mock up code for input 8

x Var Nib 


a = 1 
b = 0 
c = 1 
d = 0 

/output = 8 

x.bits3 = a 
x.bits2 = b 
x.bits1 = c 
x.bits0 = d 

when x = 8, num8 = 1 


if num8 = 1 and (switch button 8)=1 then start /start is the beginning of the whole program. 
if num8 = 1 and (switch button 8)=0 then DTMF(8) 
if num8 = 0 and (switch button 8)=1 then DTMF(8) 
else next

PS: This is just a mock up coding, so it will not work, but just an idea.

This is just a mock up code, I know it will not work.
This is just a rough "sketch" of my idea. [noparse]:)[/noparse]

Post Edited (Passerby) : 3/6/2009 5:07:57 AM GMT