수다닷컴

질문 제목 : 질문 내용 : rs232로 지금 파일전송을 시험해보고 있는 중인데요

파일을 열어서 배열에 값을 넣는것까진 성공했고

이 값을 sendstr함수에 넣어서 보내려고 하는데

실행하면 수신단에서데이터가 0인 부분에서 멈춰버립니다.

(보레이트 동일하고 연결상태 이상없습니다.)

텍스트파일의 경우에는이상없이 전송이 되는데 일반파일의 경우만 되지 않아서 답답합니다.

무엇이 문제일까요ㅠㅠ // comm32.cpp
//
#include stdio.h
#include stdlib.h
#include string.h
#include time.h
#include windows.h
#include sys/stat.h
#include comm32.h
static char *buffer;
static bool fopened;
static unsigned long dwcount;
#ifdef win32
#include windows.h
handle hcommport;
commtimeouts ctmocommport;
#else
#include termios.h
#include unistd.h
#include fcntl.h
int hcommport;
#define closehandle(h) (!close(h))
#endif
/////////////////////////////////////////////////////////////////////////////
// ccomm
ccomm::ccomm()
{
fopened = false;
}
ccomm::ccomm(int port, int baud)
{
if (initialize(port, baud) == 0) return;
fopened = true;
buffer = new char[max_in_buff];
}
ccomm::~ccomm()
{
if (!fopened) return;
delete buffer;
}
int ccomm::open(int port, int baud)
{
if (initialize(port, baud) == 0) return 0;
fopened = true;
return 1;
}
int ccomm::close()
{
if (!fopened) return 0;
fopened = false;
return (int)closehandle(hcommport);
}
int ccomm::isopen()
{
return fopened;
}
int ccomm::initialize(int port, int baud)
{
char comport[16];
#ifdef win32
dcb dcbcommport;
dword baudrate;
sprintf(comport, com%d, port+1);
hcommport = createfile(comport, generic_read | generic_write, 0,
null, open_existing, file_attribute_normal, 0);
if (hcommport == invalid_handle_value)return 0;
fillmemory(&dcbcommport, sizeof(dcbcommport), 0);
//buildcommdcb(9600,n,8,1, &dcbcommport);
getcommstate(hcommport, &dcbcommport);
switch(baud)
{
case300:baudrate = cbr_300;break;
case1200:baudrate = cbr_1200;break;
case2400:baudrate = cbr_2400;break;
case4800:baudrate = cbr_4800;break;
case9600:baudrate = cbr_9600;break;
case19200:baudrate = cbr_19200;break;
case38400:baudrate = cbr_38400;break;
case56000:baudrate = cbr_56000;break;
case57600:baudrate = cbr_57600;break;
case115200:baudrate = cbr_115200;break;
default:baudrate = cbr_9600;break;
}
dcbcommport.baudrate = baudrate;
dcbcommport.bytesize = 8;
dcbcommport.stopbits = 0;
dcbcommport.parity = 0;
dcbcommport.dcblength = sizeof(dcb);
ctmocommport.readintervaltimeout = maxdword;
ctmocommport.readtotaltimeoutmultiplier = 0;//maxdword;
ctmocommport.readtotaltimeoutconstant = 0;//maxdword;
ctmocommport.writetotaltimeoutmultiplier = 0;
ctmocommport.writetotaltimeoutconstant = 0;
setcommtimeouts(hcommport, &ctmocommport);
setcommstate(hcommport, &dcbcommport);
#else
if (baud != 9600) return 0;
sprintf(comport, /dev/ttys%d, port);
hcommport = open(comport, o_rdwr);
if (hcommport 0) return 0;
struct termios attr;
if (tcgetattr(hcommport, &attr) 0) {
close(hcommport);
return 0;
}
bzero(&attr, sizeof(attr));
attr.c_cflag = b9600 | cs8 | clocal | cread;
attr.c_iflag = ignpar;
attr.c_oflag = 0;
attr.c_lflag = 0;

attr.c_cc[vtime] = 0;
attr.c_cc[vmin] = 0;
tcflush(hcommport, tciflush);
tcsetattr(hcommport,tcsanow,&attr);
#endif
return 1;
}
char ccomm::getch()
{
if (!fopened) return 0;
char c;
//if (getlength() == 0) return 0;
#ifdef win32
readfile((handle)hcommport, &c, 1, &dwcount, null);
#else
dwcount = read(hcommport, &c, 1);
#endif
if (dwcount == 1) {
return c;
}
else {
// do something here!!!
}
return 0;
}
int ccomm::sendstr(char *buffer, int size)
{
if (!fopened) return 0;
if (size == 0) size = strlen(buffer);
#ifdef win32
writefile(hcommport, buffer, size, &dwcount, null);
#else
dwcount = write(hcommport, buffer, size);
#endif
return dwcount;
}
void main()
{
ccomm *mccom = new ccomm;
mccom-open(com1, 38400);

struct _stat buf;
_stat(abc.jpg, &buf);
int buffer_size = buf.st_size; // 파일 사이즈 재기
printf(%d\n, buffer_size);
char *buffer = new char[buffer_size + 5]; //파일을 담기위한 배열
memset(buffer, 0, buffer_size+5); // 배열초기화
file *fp;
fp = fopen(abc.jpg, rb); // abc.jpg라는 파일을 엽니다.
fread(buffer, 1, buffer_size, fp); // buffer배열에 집어넣습니다
for(int k = 0; k 5; k++) // 수신단에서끝을인지하기 위한 값을 넣습니다.
{
buffer[buffer_size + k] = 127;
}
mccom-sendstr(buffer, 0);
fclose(fp);

}

/div

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