Read RS232 with interrupt

I use this library and I want to read from rs232 with interrupt but it doesn't work
How can I fix it?

Code:

---

#include<assert.h>
#include<fcntl.h>
#include<signal.h>
#include<stdio.h>
#include<string.h>
#include<termios.h>

#ifdef__linux__
#include<unistd.h>
#endif

#ifdef_WIN32
#include<windows.h>
 #endif

#ifdef NDEBUG
 #error This test program must work with macro "ASSERT" enabled!
#endif

#include"rs232.h"

void sleep_awhile(void){

#ifdefined(__linux__)
usleep(1*1000*1000);
#elif defined(_WIN32)
 Sleep(1*1000);
#else
#error No implementation on this platform!
 #endif
}

void serial_callback(int status);

rs232_t comm;
struct termios termAttr;
struct sigaction saio;

int main(void){

#ifdefined(__linux__)
staticconstchar*const device="/dev/ttyS0";
#elif defined(_WIN32)
staticconstchar*constdevice="COM1";
#endif

printf("== Before test process : ==\n");
printf("1. Please check this device "%s" is available.\n",device); printf("2. Be sure that you had connect the RS-232 port to a loop back " "connector.\n");
 printf("\n");

rs232_init(&comm);

bool open_result=rs232_open(&comm,device);
printf("Open device "%s" : %s\n",device, (open_result)?("Succeed"):("Failed"));
if (!open_result)
 return 1;

saio.sa_handler=serial_callback;
saio.sa_flags=0;
saio.sa_restorer=NULL;
sigaction(SIGIO,&saio,NULL);

fcntl(open_result,F_SETFL,FNDELAY);
fcntl(open_result,F_SETOWN,getpid());
fcntl(open_result,F_SETFL,O_ASYNC);


//-Flush
 sleep_awhile();
assert(rs232_flush(&comm));
printf("Flushed.\n");

//-Sendmessage
static const char message[]="RS-232 test message";
assert(sizeof(message)==rs232_send(&comm,message,sizeof(message)));
printf("Sent.\n");

sleep_awhile();

rs232_deinit(&comm);
return0;
 }

void serial_callback(int__attribute__((unused))status){
char buffer[1024]={0};
 int  recsz=rs232_receive(&comm,buffer,sizeof(buffer));
 printf("Received size : %d\n",recsz);
printf("Response message : [%s]\n",buffer);
}

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What doesn't work?
Do you have compile errors, linker errors, crashes....

This trailing # looks suspicious
#ifdef__linux__ #

rs232 not receive data
not I don't have compile errors, linker errors, crashes....

The first thing you need to do is edit your post and then paste the code "text only".
The horrible colour scheme from your IDE conflicts with the board and reduces your code to mush.

Or just reply with another post with correctly formatted code and I'll fix it.

First thing are you sure that you are connected to "/dev/ttyYs0", "COM1"?

Are you sure that the device connected to your com port is trying to contaminate at the same baud, parity, etc as your program expects?

Have you tried to use a com program (minicom, putty) to connect to your remote device? Does it work?

Quote:

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Originally Posted by jimblumberg

First thing are you sure that you are connected to "/dev/ttyYs0", "COM1"?

Are you sure that the device connected to your com port is trying to contaminate at the same baud, parity, etc as your program expects?

Have you tried to use a com program (minicom, putty) to connect to your remote device? Does it work?

---

Yes I'm sure / dev / ttys0 is connected
It works when I send and receive data like the following code
But it does not work when I add interrupt configuration and call back function

Code:

---

assert( sizeof(message) == rs232_send(&comm, message, sizeof(message)) );
printf("Sent.\n");
 // - Receive message
sleep_awhile();
char buffer[1024] = {0};
int  recsz = rs232_receive(&comm, buffer, sizeof(buffer));
printf("Received size : %d\n", recsz);
printf("Response message : [%s]\n", buffer);
 // - Check response
bool echo_result = ( recsz == sizeof(message) )&&( !memcmp(buffer, message, recsz) );
printf("Response check : %s\n", (echo_result ? "Succeed." : "FAILED!"));

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Can you show the code that uses interrupts? What platform is that for where you can use interrupts directly anyway? From what I can see, this library is only for Linux and Windows, and in those systems you don't have direct access to interrupts (except in low-level driver code).

Quote:

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Originally Posted by christop

Can you show the code that uses interrupts? What platform is that for where you can use interrupts directly anyway? From what I can see, this library is only for Linux and Windows, and in those systems you don't have direct access to interrupts (except in low-level driver code).

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I got the interruption idea with sigaction from this page: Serial Programming HOWTO

Would you mind giving more details about the hardware in question, and about the use case? Most PCs since about 2005 no longer have an RS232 port to use, and similarly most peripherals today use USB for serial communication instead. Aside from that, the specific goal may be relevant in determining what the serial connection is actually doing.