linux 시리얼 통신 도중 문제가 생깁니다.
글쓴이: rkakdrhfi / 작성시간: 화, 2018/01/23 - 5:26오후
fd = OpenSerial(devName,baud,0,1);
if(fd < 0 ) return -2;
printf("Opend %s device\n",devName);
sData.mode = 0x03;
sData.type = 0;
sData.number = 20;
sData.data = writeData;
sleep(1);
buf[0]=0x01;
buf[1]=0x03;
buf[2]=0x00;
buf[3]=0x00;
buf[4]=0x00;
buf[5]=0x14;
buf[6]=0x45;
buf[7]=0xC5;
printf("Data sending test start....\n");
for(idx=0;idx<10;++idx){
count = 0;
//WriteData(fd,&sData);
printf("He");
write(fd,buf,8);
printf("llo");
while(count<45){
usleep(1000);
printf("received data: ");
rdcnt = read(fd,rxBuf+count,sizeof(rxBuf));
printf("%2d_%2d\n",rdcnt,count);
if(count == rdcnt+count){
break;
}
count = rdcnt+count;
}
rxBuf[count] = '\0';
printf("<%s rd=%2d> %s\n",devName, count,rxBuf);
printf("I will sleep 100ms\n");
usleep(100*1000);
printf("I waked up\n");
}
printf("Data sending test end....\n");
CloseSerial(fd);int OpenSerial(char* devName, int baud, int vTime, int vMin)
{
int fd;
struct termios newtio;
fd = open(devName, O_RDWR | O_NOCTTY);
if( fd < 0 )
{
printf("Can`t open Device");
return -1;
}
tcgetattr(fd,&oldtio);
memset(&newtio, 0, sizeof(newtio));
newtio.c_iflag = IGNPAR;
newtio.c_oflag = 0;
newtio.c_cflag = CS8 | CLOCAL | CREAD;
switch( baud )
{
case 115200 : newtio.c_cflag |= B115200; break;
case 57600 : newtio.c_cflag |= B57600; break;
case 38400 : newtio.c_cflag |= B38400; break;
case 19200 : newtio.c_cflag |= B19200; break;
case 9600 : newtio.c_cflag |= B9600; break;
case 4800 : newtio.c_cflag |= B4800; break;
case 2400 : newtio.c_cflag |= B2400; break;
default : newtio.c_cflag |= B115200; break;
}
newtio.c_lflag = 0;
newtio.c_cc[VTIME] = vTime;
newtio.c_cc[VMIN] = vMin;
tcflush( fd, TCIFLUSH);
tcsetattr( fd, TCSANOW, &newtio);
return fd;
}
void CloseSerial(int fd)
{
tcsetattr(fd,TCSANOW,&oldtio);
close(fd);
}
현재 코드 상태는 이렇습니다. 프로그램 동작시 로그 내용은
Opend /dev/ttyUSB0 device Data sending test start.... Helloreceived data: 1_ 0 received data: 12_ 1 received data: 12_13 received data: 11_25 received data: 9_36 </dev/ttyUSB0 rd=45> I will sleep 100ms I waked up Helloreceived data: 11_ 0 received data: 12_11 received data: 11_23 received data: 11_34 </dev/ttyUSB0 rd=45> I will sleep 100ms I waked up Helloreceived data: 10_ 0 received data: 11_10 received data: 12_21 received data: 11_33 received data: 1_44 </dev/ttyUSB0 rd=45> I will sleep 100ms I waked up Helloreceived data: 8_ 0 received data: 11_ 8 received data: 12_19 received data: 14_31 </dev/ttyUSB0 rd=45> I will sleep 100ms I waked up Helloreceived data: 6_ 0 received data: 11_ 6 received data: 12_17 received data: 11_29 received data: 5_40 </dev/ttyUSB0 rd=45> I will sleep 100ms I waked up Helloreceived data: 4_ 0 received data: 12_ 4 received data: 11_16 received data: 12_27 received data: 6_39 </dev/ttyUSB0 rd=45> I will sleep 100ms I waked up Helloreceived data: 3_ 0 received data: 11_ 3 received data: 12_14 received data: 11_26 received data: 8_37 </dev/ttyUSB0 rd=45> I will sleep 100ms I waked up Helloreceived data: 1_ 0 received data: 11_ 1 received data: 12_12 received data: 11_24 received data: 10_35 </dev/ttyUSB0 rd=45> I will sleep 100ms I waked up
이렇게 나옵니다. 마지막 출력에서 I waked up 다음 멈추더라도 시리얼 통신 write전에 He 출력 후 write에서 멈추지 않을까 싶은데 바로 멈춰서 당황스럽네여... 혹시 이러한 멈춤 현상에 대해 해결방법이나 어디서 문제가 생기는지 궁금합니다.
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