extern "C" BOOL ReadByteEx (BYTE *data, int timeout, BOOL warn)
{
if(data == NULL)
return FALSE;
if (ParPort == -1)
{
DWORD BytesReceived = 0;
FT_SetTimeouts(ftHandleA,timeout*1000,0);
ftStatus = FT_Read(ftHandleA,RxBuffer,1,&BytesReceived);
if (ftStatus == FT_OK)
{
if (BytesReceived == 1)
{
// FT_Read OK
*data = RxBuffer[0];
return TRUE;
}
else
{
// FT_Read Timeout
if (warn)
MessageBox(topHWnd, "USB Error: Read Timeout", "ReadByteEx", MB_OK | MB_ICONERROR);
return FALSE;
}
}
else
{
// FT_Read Failed
if (warn)
MessageBox(topHWnd, "USB Error: Read Failed", "ReadByteEx", MB_OK | MB_ICONERROR);
return FALSE;
}
}
else
{
BYTE a, b;
time_t starttime = time(NULL);
shadow |= 0x20;
pwControl(shadow); // set port to input mode
b = prStatus(); // wait for ACK
while (!((b ^ c) & 0x20))
{
b = prStatus();
if (time(NULL) > starttime + (time_t)timeout)
{
if (warn)
MessageBox(topHWnd, "Timeout on data transfer!", "ReadByte", MB_OK | MB_ICONERROR);
return FALSE;
}
}
c = b;
a = prData(); // read data
shadow ^= 0x02;
pwControl(shadow); // signal byte received
*data = a;
return TRUE;
}
}
BOOL WriteByteEx (BYTE data, int timeout, BOOL warn)
{
if (ParPort == -1)
{
DWORD BytesWritten = 0;
FT_SetTimeouts(ftHandleA,10000,0);
TxBuffer[0] = data;
ftStatus = FT_Write(ftHandleA,TxBuffer,1,&BytesWritten);
if (ftStatus == FT_OK)
{
if (BytesWritten == 1)
{
// FT_Read OK
return TRUE;
}
else
{
// FT_Write Timeout
if (warn)
MessageBox(topHWnd, "USB Error: Write Timeout", "WriteByteEx", MB_OK | MB_ICONERROR);
return FALSE;
}
}
else
{
// FT_Write Failed
StatusText("FT STATUS = %i", ftStatus);
MessageBox(topHWnd, "USB Error: Write Failed", "WriteByteEx", MB_OK | MB_ICONERROR);
return FALSE;
}
}
else
{
time_t starttime = time(NULL);
BYTE b;
shadow &= 0xDF;
pwControl(shadow); // set port to output mode
pwData(data); // output data
shadow ^= 0x01;
pwControl(shadow); // signal byte sent
b = prStatus(); // wait for ACK
while (!((b ^ c) & 0x10))
{
b = prStatus();
if (time(NULL) > starttime + (time_t)timeout)
{
if (warn)
MessageBox(topHWnd, "Timeout on data transfer!", "WriteByte", MB_OK | MB_ICONERROR);
return FALSE;
}
}
c = b;
return TRUE;
}
}
extern "C" void InitPort (void)
{
if (ParPort == -1)
{
DWORD modemWord = 0;
usb_timeout_error = FALSE;
ftStatus = FT_GetModemStatus (ftHandleB, &modemWord);
if (ftStatus != FT_OK)
{
MessageBox(topHWnd, "USB Error: Get Power Status Failed!", "InitPort", MB_OK | MB_ICONERROR);
return;
}
if (modemWord & 0x80)
MessageBox(topHWnd, "USB CopyNES is OFF - turn on then hit OK", "InitPort", MB_OK | MB_ICONERROR);
// flush receive/transmit buffers
ftStatus = FT_Purge (ftHandleA, FT_PURGE_RX | FT_PURGE_TX);
if (ftStatus != FT_OK)
{
MessageBox(topHWnd, "USB Error: Purge A Failed!", "InitPort", MB_OK | MB_ICONERROR);
return;
}
ftStatus = FT_Purge (ftHandleB, FT_PURGE_RX | FT_PURGE_TX);
if (ftStatus != FT_OK)
{
MessageBox(topHWnd, "USB Error: Purge B Failed!", "InitPort", MB_OK | MB_ICONERROR);
return;
}
connection_initialized = TRUE;
}
else
{
if ((prECP() & 0x03) == 0x01)
{
pwECP(0x34);
if (prECP() == 0x35)
pwECP((prECP() & 0x1F) | 0x20); // try to set ECP port to bidirectional mode
}
shadow |= 0x40; // pull ACK line high - this way, printers won't listen to us
pwControl(shadow);
c = prStatus();
connection_initialized = TRUE;
}
}
BOOL ReadByteReady (void)
{
if (ParPort == -1)
{
DWORD EventDWord = 0;
DWORD RxBytes = 0;
DWORD TxBytes = 0;
FT_GetStatus(ftHandleA,&RxBytes,&TxBytes,&EventDWord);
if (RxBytes > 0)
return TRUE;
else
return FALSE;
}
else
{
BYTE b;
b = prStatus(); // wait for ACK
if (!((b ^ c) & 0x20))
return FALSE;
return TRUE;
}
}
extern "C" BOOL ReadByteReady (void) //check if byte is waiting in queue
{
if (ParPort == -1)
{
DWORD EventDWord = 0;
DWORD RxBytes = 0;
DWORD TxBytes = 0;
if(usb_timeout_error) return FALSE;
FT_GetStatus(ftHandleA,&RxBytes,&TxBytes,&EventDWord);
if (RxBytes > 0)
return TRUE;
else
return FALSE;
}
else
{
BYTE b;
b = prStatus(); // wait for ACK
if (!((b ^ c) & 0x20))
return FALSE;
return TRUE;
}
}
