151 lines
3.0 KiB
C
151 lines
3.0 KiB
C
#include "__serial.h"
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#if defined(_WIN32) && !defined(_XBOX) && !defined(__LIBRETRO__)
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HANDLE SerialPort = NULL; // Handle of SerialPort itself.
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BOOL SerialOpen(int port, int baud) {
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HANDLE Comport;
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DCB myDCB;
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COMMTIMEOUTS CTout;
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char str[100];
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if (port > 9)
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sprintf(str, "\\\\.\\COM%d", port);
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else
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sprintf(str, "COM%d", port);
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// Open the serial port
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if ((Comport = CreateFile(str, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL)) == INVALID_HANDLE_VALUE)
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return FALSE;
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// Configure Serial port (Setup Comm)
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// Buffer sizes
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if (!SetupComm(Comport, 128, 128))
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return FALSE;
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// Setup DCB using current values
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if (!GetCommState(Comport, &myDCB))
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return FALSE;
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myDCB.fInX = FALSE; // Turn off xon/xoff handler
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myDCB.fOutX = FALSE;
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myDCB.fOutxDsrFlow = FALSE;
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myDCB.fOutxCtsFlow = FALSE; // no hardware flow control.
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myDCB.BaudRate = baud;
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myDCB.DCBlength = sizeof(DCB);
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myDCB.fBinary = 1;
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myDCB.fParity = 0;
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myDCB.fDtrControl = DTR_CONTROL_DISABLE;
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myDCB.fDsrSensitivity = 0;
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myDCB.fTXContinueOnXoff = 1;
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myDCB.fNull = 0;
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myDCB.fRtsControl = RTS_CONTROL_DISABLE;
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myDCB.fDummy2 = 0;
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myDCB.wReserved = 0;
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myDCB.Parity = NOPARITY;
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myDCB.StopBits = ONESTOPBIT;
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myDCB.wReserved1 = 0;
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myDCB.ByteSize = 8;
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if (!SetCommState(Comport, &myDCB))
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return FALSE;
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// Set timeouts
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CTout.ReadIntervalTimeout = 0xffffffff;
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CTout.ReadTotalTimeoutMultiplier = 0;
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CTout.ReadTotalTimeoutConstant = 0;
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CTout.WriteTotalTimeoutMultiplier = 0;
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CTout.WriteTotalTimeoutConstant = 5000; // don't hang if CTS is locked, for example
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SetCommTimeouts(Comport, &CTout);
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EscapeCommFunction(Comport, SETDTR);
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PurgeComm(Comport, PURGE_TXCLEAR | PURGE_RXCLEAR);
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SerialPort = Comport;
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return TRUE;
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}
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void SerialClose(void) {
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if (SerialPort == NULL) return;
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PurgeComm(SerialPort, PURGE_TXCLEAR | PURGE_RXCLEAR);
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CloseHandle(SerialPort);
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SerialPort = NULL;
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}
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BOOL SerialSendChar(int c) {
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DWORD cr;
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if (WriteFile(SerialPort, &c, 1, (LPDWORD)&cr, NULL) && cr)
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return TRUE;
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else
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return FALSE;
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}
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int SerialIsOpen(void) {
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return(SerialPort != NULL);
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}
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int SerialGetChar(void) {
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uint8 ch;
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DWORD cr;
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if (SerialPort != NULL) {
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if (ReadFile(SerialPort, &ch, 1, (LPDWORD)&cr, NULL) && cr)
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return (int)ch;
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}
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return EOF;
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}
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void SendCmd(uint8 *cmd, int size) {
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int i;
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for (i = 0; i < size; i++) {
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SerialSendChar(cmd[i]);
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}
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}
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int ReadResp(uint8 *resp, int size) {
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int i = 0, sum = 0, data;
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while (i < size) {
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while ((data = SerialGetChar()) == EOF) {
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}
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resp[i] = data & 0xff;
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sum += (data & 0xff);
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i++;
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}
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return sum;
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}
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#else
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/* code is not portable, so make stubs for now */
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BOOL SerialOpen(int port, int baud) {
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return FALSE;
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}
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void SerialClose(void) {
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}
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BOOL SerialSendChar(int c) {
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return FALSE;
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}
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int SerialIsOpen(void) {
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return FALSE;
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}
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int SerialGetChar(void) {
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return EOF;
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}
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void SendCmd(uint8 *cmd, int size) {
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}
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int ReadResp(uint8 *resp, int size) {
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return 0;
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}
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#endif
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