merge mappers from FCEU-mm

[fceu.git] / boards / __serial.c

\r
#include "__serial.h"\r
\r
HANDLE SerialPort = NULL;  // Handle of SerialPort itself.\r
\r
BOOL SerialOpen(int port, int baud)\r
{\r
  HANDLE Comport;\r
  DCB myDCB;\r
  COMMTIMEOUTS CTout;\r
  char str[100];\r
\r
  if (port > 9)\r
    sprintf(str, "\\\\.\\COM%d", port);\r
  else\r
    sprintf(str, "COM%d", port);\r
\r
  // Open the serial port\r
  if ((Comport = CreateFile(str, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL)) == INVALID_HANDLE_VALUE)\r
    return FALSE;\r
\r
  // Configure Serial port (Setup Comm)\r
\r
  // Buffer sizes\r
  if (!SetupComm(Comport, 128, 128))\r
    return FALSE;\r
\r
  // Setup DCB using current values\r
  if (!GetCommState(Comport, &myDCB))\r
    return FALSE;\r
\r
  myDCB.fInX = FALSE;     // Turn off xon/xoff handler\r
  myDCB.fOutX = FALSE;\r
  myDCB.fOutxDsrFlow = FALSE;\r
  myDCB.fOutxCtsFlow = FALSE;    // no hardware flow control.\r
  myDCB.BaudRate = baud;\r
  myDCB.DCBlength = sizeof(DCB);\r
  myDCB.fBinary = 1;\r
  myDCB.fParity = 0;\r
  myDCB.fDtrControl = DTR_CONTROL_DISABLE;\r
  myDCB.fDsrSensitivity = 0;\r
  myDCB.fTXContinueOnXoff = 1;\r
  myDCB.fNull = 0;\r
  myDCB.fRtsControl = RTS_CONTROL_DISABLE;\r
  myDCB.fDummy2 = 0;\r
  myDCB.wReserved = 0;\r
  myDCB.Parity = NOPARITY;\r
  myDCB.StopBits = ONESTOPBIT;\r
  myDCB.wReserved1 = 0;\r
  myDCB.ByteSize = 8;\r
\r
  if (!SetCommState(Comport, &myDCB))\r
	return FALSE;\r
\r
  // Set timeouts\r
  CTout.ReadIntervalTimeout = 0xffffffff;\r
  CTout.ReadTotalTimeoutMultiplier = 0;\r
  CTout.ReadTotalTimeoutConstant = 0;\r
  CTout.WriteTotalTimeoutMultiplier = 0;\r
  CTout.WriteTotalTimeoutConstant = 5000;         // don't hang if CTS is locked, for example\r
\r
  SetCommTimeouts(Comport, &CTout);\r
  EscapeCommFunction(Comport, SETDTR);\r
  PurgeComm(Comport, PURGE_TXCLEAR | PURGE_RXCLEAR);\r
\r
  SerialPort = Comport;\r
\r
  return TRUE;\r
}\r
\r
void SerialClose(void)\r
{\r
  if (SerialPort == NULL) return;\r
\r
  PurgeComm(SerialPort, PURGE_TXCLEAR | PURGE_RXCLEAR);\r
  CloseHandle(SerialPort);\r
\r
  SerialPort = NULL;\r
}\r
\r
BOOL SerialSendChar(int c)\r
{\r
  DWORD cr;\r
  if(WriteFile(SerialPort, &c, 1, (LPDWORD)&cr, NULL) && cr)\r
    return TRUE;\r
  else\r
    return FALSE;\r
}\r
\r
int SerialIsOpen(void)\r
{\r
  return (SerialPort != NULL);\r
}\r
\r
int SerialGetChar(void)\r
{\r
  uint8 ch;\r
  DWORD cr;\r
  if (SerialPort != NULL) {\r
    if (ReadFile(SerialPort, &ch, 1, (LPDWORD)&cr, NULL) && cr)\r
      return (int)ch;\r
  }\r
  return EOF;\r
}\r
\r
void SendCmd(uint8 *cmd, int size)\r
{\r
   int i;\r
   for(i=0; i<size; i++) {\r
     SerialSendChar(cmd[i]);\r
   }\r
}\r
\r
int ReadResp(uint8 *resp, int size)\r
{\r
   int i = 0, sum = 0, data;\r
   while(i < size) {\r
	   while ((data = SerialGetChar()) == EOF) {}\r
       resp[i] = data & 0xff;\r
       sum += (data & 0xff);\r
       i++;\r
   }\r
   return sum;\r
}\r