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problem

i use keil arm rvct
and have small problem
RVCT have no #pragma pack(1)
but when i got program from my friend i didnt see this program and RVCT didnt say warning about this command - and i have problem
because this command destroy execute program
for example

#pragma pack(1)

typedef struct
{ unsigned char command; unsigned long packets; unsigned char reserved[3];

} COMMAND2;

int main()
{ COMMAND2 cmd2; unsigned long Size;

cmd2.command = 0x01; cmd2.packets = 1000; Size = cmd2.packets; Size = cmd2.command;
}

when run this program Size <> 1 at the end !!!

undetermine command #pragma pack(1) create error and compiler dont say warning about this command
if correct program for RVTC

typedef __packed struct
{ unsigned char command; unsigned long packets; unsigned char reserved[3];

} COMMAND2;

int main()
{ COMMAND2 cmd2; unsigned long Size;

cmd2.command = 0x01; cmd2.packets = 1000; Size = cmd2.packets; Size = cmd2.command;
}

we will get ok result

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  • "No, my compiler may be a different version than yours and produce different code. My compile options may be different than yours and produce different code."
    1 if you wanted - you got evalution version from keil
    2 i try on few version compiler rvtc from keil
    3 you say very much words - but dont said word
    4 try and look - and dont say what you lower man - and try faqs again