serial port problem

nasr-noor · 11-26-2008, 05:31 AM

Hi,
I have 2 PC one has Windows and send data frame on serial port, and another is fedora 9 and receive data.
I convert my integer value to binary, and every value is one byte(char).
When I receive characters convert this char(binary) to int and use them.

when I send 13,17,19 binary character, I receive wrong value on fedora, but when I receive them on windows its ok.

do you know whats the problem?

Wim Sturkenboom · 11-26-2008, 10:53 PM

Do you mind explaining a bit more in detail (and maybe sharing some code). I'm a bit confused as an integer is already a binary (so why convert).

What do you receive?

Thoughts that came up while reading your post:

little endian / big endian problem (will not be the case of both systems run on the same processor type (e.g. x86))
serial port configuration (7-bit / 8-bit, parity, ...)

nasr-noor · 11-29-2008, 12:51 AM

Excuse me,
I send integer value(Not ASCII code),for example 00000000(Not 48) for number 0.
I convert my integer to char for send, and when I receive char convert it to integer.
problem:
when I send 00000000,00001101,00010001,00010011 for 0,13,17,19 on linux I receive NULL or wrong characters.

Wim Sturkenboom · 11-30-2008, 10:30 PM

Difficult to say from your description. I assume that the NULL is generated by your code and probably means that there is no data received.

Sorry, but I don't think that I can help further.