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Article #2449Little/Big Endian
From: Endian
Date: Wed, 12 Apr 2006 15:29
Date: Wed, 12 Apr 2006 15:29
27 lines
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1711 bytes
Assume that we want to communicate (a) via RS232 and (b) via ethernet
between a PC and an ARM based embedded controller unit (and/or a PDA)
Assume that most of the communication consist of transmitting/receiving of
messages similar to the following structure. Also assume that both PC
application and ARM application use the same header files for the messages.
typedef struct {
short int A;
int B;
float C;
double D;
unsigned char E;
}MyStruct;
Becasue Pentium processor in PC and ARM processor in the embedded unit use
different endians (litte & big endians) the byte orders in the transmitted
and received structures will be different.
How to solve this little/big endian problem?
How to make PC application send/receive structures to a ARM based embedded
unit (a) via RS232 and (b) via ethernet between without worrying about the
endians?
Regards.
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