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Altera_Forum
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19 years ago

HELP!!

This is my program: # include <stdio.h># include <sys/types.h># include <fcntl.h> int main() { int p_button=NULL; unsigned int x=0; p_button=open("/dev/ttyS0",O_RDWR); if(p_...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

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originally posted by sdhnain@May 23 2006, 11:05 PM

hi,

i think the problem is with a missing include library;

because when it says : "implicite declaration of function read()"

it means that the compiler can&#39;t find definition of the function.

so u must :

1) be shure that all required libraries are included

2) specify the whole path for types.h in :# include <sys/types.h>

best regards http://forum.niosforum.com/work2/style_emoticons/<#emo_dir#>/biggrin.gif

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First,thanks!

there are very much lib about serial port,so I don&#39;t know use which lib ?

what can i do?