c++ - Send Hex Bytes To A Serial Port -

i attempting send hexadecimal bytes serial com port. issue segment sends command apparently wants system string instead of integer (error c2664 "cannot convert parameter 1 'int' 'system::string ^'). have looked way send integer instead have had no luck. (i have tried sending string representations of hexadecimal values, device did not recognize commands)

main part of code

private: system::void poll_click(system::object^  sender, system::eventargs^  e)       {             int i, end;             double = 1.58730159;             string^ portscan = "port";             string^ translate;             std::string portresponse [65];             std::fill_n(portresponse, 65, "z");              (i=1;i<64;i++)             {                 if(this->_serialport->isopen)                 {                     // command 0 generator                     int y = 2;                     y += i;                     int command0[10] = {0xff, 0xff, 0xff, 0xff, 0xff, 0x02, dectohex(i), 0x00, 0x00, dectohex(y)};                      (end=0;end<10;end++)                     {                         this->_serialport->writeline(command0[end]);                     }                      translate = (this->_serialport->readline());                     marshalstring(translate, portresponse [i]);                     if(portresponse [i] != "z")                     {                         combobox7->items->add(i);                     }                     this->progressbar1->value=a;                     += 1.58730159;                 }             }        } 

here function dectohex:

    int dectohex(int i)          {             int x = 0;             char hex_array[10];             sprintf (hex_array, "0x%02x", i);             string hex_string(hex_array);             x = atoi(hex_string.c_str());             return x;          } 

thank time , effort!

---

this solved problem, courtesy of jochen kalmbach

auto data = gcnew array<system::byte> { 0xff, 0xff, 0xff, 0xff, 0xff, 0x02, 0xbf, 0x00, 0x00, 0xbd }; _serialport->write(data, 0, data->length); 

replaced this

this->_serialport->writeline(command0[end]); 

you cannot sent integer on serial line.... can sent bytes (7-8 bit)!

you need choose want do:

• sent characters: "number" 12 converted bytes

  _serialport->write(12.tostring()); // => 0x49, 0x50 

• sent integer (4 bytes) little endian

  auto data = system::bitconverter::getbytes(12); _serialport->write(data, 0, data->length); // => 0x0c, 0x00, 0x00, 0x00 

• or write single byte:

  auto data = gcnew array<system::byte> { 12 }; _serialport->write(data, 0, data->length); // => 0x0c 

• or write byte array:

  auto data = gcnew array<system::byte> { 0xff, 0xff, 0xff, 0xff, 0xff, 0x02, 0xbf, 0x00, 0x00, 0xbd }; _serialport->write(data, 0, data->length); // => 0xff 0xff 0xff 0xff 0xff 0x02 0xbf 0x00 0x00 0xbd