git.rot13.org Git - digitaldcpower/blob - ddcp-script-windows/ddcp-script-ttyinit-win.c

   1 /* vim: set sw=8 ts=8 si et: */\r
   2 /* Windows software to initialize the com port\r
   3 */\r
   4 \r
   5 #include <stdio.h>\r
   6 #include <stdlib.h>\r
   7 #include <unistd.h>\r
   8 #include <time.h>\r
   9 #include <windows.h>\r
  10 \r
  11 static HANDLE fd;\r
  12 \r
  13 int open_tty(char *comport){\r
  14         char CommPath[42];\r
  15         char lastError[512];\r
  16         DCB Dcb;\r
  17         BOOL ok;\r
  18 \r
  19         snprintf(CommPath,40,"\\\\.\\%s",comport); // COM1 or COM2 or ...\r
  20         CommPath[40]='\0';\r
  21         fd = CreateFile(CommPath,\r
  22                       GENERIC_READ | GENERIC_WRITE,\r
  23                       0,\r
  24                       NULL,\r
  25                       OPEN_EXISTING,\r
  26                       0,\r
  27                       NULL);\r
  28 \r
  29         if (fd == INVALID_HANDLE_VALUE) {\r
  30                 //fprintf(stderr, "CreateFile failed: CommPath (%.8x)\n", (unsigned int)GetLastError());\r
  31                 FormatMessage(\r
  32                         FORMAT_MESSAGE_FROM_SYSTEM|FORMAT_MESSAGE_IGNORE_INSERTS,\r
  33                         NULL,\r
  34                         GetLastError(),\r
  35                         MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),\r
  36                         lastError,\r
  37                         512,\r
  38                         NULL);\r
  39                 fprintf(stderr,"ERROR open com-port: %s\n",lastError);\r
  40                 exit(1);\r
  41         }\r
  42 \r
  43         memset(&Dcb, 0x0, sizeof(DCB));\r
  44         Dcb.DCBlength = sizeof (DCB);\r
  45         ok = GetCommState(fd, &Dcb);\r
  46         if (!ok){\r
  47                 fprintf(stderr, "File %s Line %d Function GetCommState failed (%.8x)\n",\r
  48                        __FILE__, __LINE__,(unsigned int) GetLastError());\r
  49                 exit(1);\r
  50         }\r
  51  \r
  52         // some reasonable defaults even if we do not use Tx/Rx:\r
  53         Dcb.Parity=NOPARITY;\r
  54         Dcb.BaudRate=9600;\r
  55         Dcb.ByteSize=8;\r
  56         Dcb.StopBits=ONESTOPBIT;\r
  57 \r
  58         Dcb.fDtrControl = DTR_CONTROL_ENABLE;\r
  59         Dcb.fRtsControl = RTS_CONTROL_ENABLE;\r
  60         ok = SetCommState(fd, &Dcb);\r
  61         if (!ok){\r
  62                 fprintf(stderr, "File %s Line %d Function SetCommState failed (%.8x)\n",\r
  63                        __FILE__, __LINE__,(unsigned int) GetLastError());\r
  64                 exit(1);\r
  65         }\r
  66         return(0);\r
  67 }\r
  68 \r
  69 int main(int argc, char *argv[])\r
  70 {\r
  71         char *device;\r
  72 \r
  73         if (argc != 2){\r
  74                 printf("USAGE: ddcp-script-ttyinit COMPORT\n");\r
  75                 printf("Example: ddcp-script-ttyinit COM4\n");\r
  76                 exit(0);\r
  77         }\r
  78         device=argv[1];\r
  79 \r
  80         open_tty(device);\r
  81         Sleep(100); // sleep: units are in 1/1000 sec\r
  82         CloseHandle(fd);\r
  83         return(0);\r
  84 }\r