Reading one byte at a time.

prushik · 09-18-2009, 03:31 PM

I'm writing a program on Linux to read from the serial port one byte at a time. I had it working before. For some reason now though, I try to read a byte in as a character and the result is way longer than one byte.

Code:

char tmp;
read(fd,tmp,1);
printf("0x%X",&tmp);

And my output is:
0xB7B7A3B7

What's the deal? I thought chars only contained one byte.

prushik · 09-18-2009, 03:41 PM

Quote:

Originally Posted by prushik

I'm writing a program on Linux to read from the serial port one byte at a time. I had it working before. For some reason now though, I try to read a byte in as a character and the result is way longer than one byte.

Code:

char tmp;
read(fd,tmp,1);
printf("0x%X",&tmp);

And my output is:
0xB7B7A3B7

What's the deal? I thought chars only contained one byte.

Sorry, Sorry. My fault.
I have been printing the memory address of the char instead of the value.
Sucks, I spent a whole day on a stupid mistake.

Sincere Apologies.

smeezekitty · 09-19-2009, 12:17 PM

nope wrong again

Code:

chat tmp;
read(fd,&tmp,1);
printf("0x%X", tmp);

is correct

prushik · 09-19-2009, 02:45 PM

Quote:

Originally Posted by smeezekitty

nope wrong again

Code:

chat tmp;
read(fd,&tmp,1);
printf("0x%X", tmp);

is correct

Right, my fault. Thats what I have in my program (except I used a char not a chat

), just a typo when I posted.

smeezekitty · 09-19-2009, 07:16 PM

no the chat was my fault
of cource it means char LOL

prushik · 09-20-2009, 01:35 AM

Quote:

Originally Posted by smeezekitty

no the chat was my fault
of cource it means char LOL

I figured. Typos are acceptable.