Thread: 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);
}

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.

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!"));