binary variable

[spokex]

I need to communicate via mscomm with a digitizer. According to the manufacturer if I send a binary 00000001 it will return three 8 bit bytes of data.

Foxpro and Mscomm I have experience with but coding for binary is new to me.

Thanks

Scott

 

[GriffMG]

Hi,

A binary 000001 is just a character with only the first bit set - so you can send it by just using a CHR(1) if you want.

Martin

Regards

Griff
Keep [Smile]ing

 

[spokex]

I was trying to make it much more complicated.

Thanks

Scott

 

[GriffMG]

Why?

B-)

Regards

Griff
Keep [Smile]ing

 

[spokex]

When the binary bytes are recieved from the device, what is the best way to convert them into an integer?

Scott

 

[DSummZZZ]

Take a look at this FAQ:

Conversion Functions: Dec,Hex,Binary,Oct Back and Forth
faq184-4461


-Dave Summers-

Even more Fox stuff at:

http://www.davesummers.net/foxprolinks.htm

 

[GriffMG]

For small numbers - up to 254

asc(mybyteshere)

When you need something bigger, you will need to know which byte(s) are the most significant and multiply that one by 255 and add in the other one.

i.e. if the first byte is the most significant in a two byte pair:

myInteger = (Asc(myFirstByte) * 255)  + Asc(mySecondByte)

Do you follow?




Regards

Griff
Keep [Smile]ing

 

[GriffMG]

I have that wrong, if one byte takes you to 255 (FF) and then the next one would be 256, so you have to multiply the most significant byte in a two byte pair by 256 (sorry)

Regards

Griff
Keep [Smile]ing