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Sending Binary Data with "printf"

Hi..

I want to send Binary Data using printf() function

for examle if I do

 printf("%d",i)

where i=16706 then printf() function transmit that integer in text mode (not in Binary mode) i.e. it will send 5 bytes for 16706.
If I use %X instead of %d even then it will send 4142 in HEX....that means 4 bytes.

Now if somhow I can send the number 16706 in binary .... it will become 0xAB which is only two bytes .

so for any integer upto 65636.... I can send it as binary in only two bytes..

I f somone knows...pls let me know.

Thanks....

Parents

0 Andrew Neil over 23 years ago

"printf() function transmit that integer in text mode (not in Binary mode) i.e. it will send 5 bytes for 16706"

Well of course it does!
The clue is in the function name: printf - clearly this is aimed at a printing output device, which will naturally expect text output!

This should also serve as a warning to you: it is up to you to ensure that your entire communications link can pass binary data; it only takes one step in the link to interpret your binary data as control codes, and the entire link will get messed up.
Be careful!
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0 Andrew Neil over 23 years ago

"printf() function transmit that integer in text mode (not in Binary mode) i.e. it will send 5 bytes for 16706"

Well of course it does!
The clue is in the function name: printf - clearly this is aimed at a printing output device, which will naturally expect text output!

This should also serve as a warning to you: it is up to you to ensure that your entire communications link can pass binary data; it only takes one step in the link to interpret your binary data as control codes, and the entire link will get messed up.
Be careful!
Cancel
Vote up 0 Vote down

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