int main()
{
char cBufWrite[BUF_SIZE];
char * pcBufRead = NULL;
char * pcBufLD[MAX_DEVICES + 1];
char cBufLD[MAX_DEVICES][64];
DWORD dwRxSize = 0;
DWORD dwBytesWritten, dwBytesRead, dwErrors;
FT_STATUS ftStatus;
FT_HANDLE ftHandle[MAX_DEVICES];
int iNumDevs = 0;
int i, j;
int iDevicesOpen;
FTDCB ftDCB, ftnewDCB;
FTCOMSTAT ftComStat;
FTTIMEOUTS ftTimouts, ftnewTimouts;
struct timeval tv;
struct timezone tz;
for(i = 0; i < MAX_DEVICES; i++) {
pcBufLD[i] = cBufLD[i];
}
pcBufLD[MAX_DEVICES] = NULL;
ftStatus = FT_ListDevices(pcBufLD, &iNumDevs, FT_LIST_ALL | FT_OPEN_BY_SERIAL_NUMBER);
if(ftStatus != FT_OK) {
printf("Error: FT_ListDevices(%d)\n", ftStatus);
return 1;
}
for(j = 0; j < BUF_SIZE; j++) {
cBufWrite[j] = j;
}
for(i = 0; ( (i <MAX_DEVICES) && (i < iNumDevs) ); i++) {
printf("Device %d Serial Number - %s\n", i, cBufLD[i]);
}
for(i = 0; ( (i <MAX_DEVICES) && (i < iNumDevs) ) ; i++) {
memset(&ftDCB, 0, sizeof(FTDCB));
ftHandle[i] = FT_W32_CreateFile(
cBufLD[i],
0, // GENERIC_READ|GENERIC_WRITE ignored
0, // ignored
0, // ignored
0, // OPEN_EXISTING ignored
FT_OPEN_BY_SERIAL_NUMBER, // ignored FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED | FT_OPEN_BY_SERIAL_NUMBER,
0 // ignored
);
/* Setup */
if(ftHandle[i] == (FT_HANDLE)INVALID_HANDLE_VALUE){
/*
This can fail if the ftdi_sio driver is loaded
use lsmod to check this and rmmod ftdi_sio to remove
also rmmod usbserial
*/
printf("Error FT_W32_CreateFile(%d), device\n", i);
return 1;
}
printf("Opened device %s\n", cBufLD[i]);
ftDCB.BaudRate = 9600;
if(FT_W32_SetCommState(ftHandle[i], &ftDCB) == FALSE) {
ftStatus = FT_W32_GetLastError(ftHandle[i]);
printf("Error FT_W32_SetCommState = %d)\n", ftStatus);
return 1;
}
if(FT_W32_GetCommState(ftHandle[i], &ftnewDCB) == FALSE) {
ftStatus = FT_W32_GetLastError(ftHandle[i]);
printf("Error FT_W32_GetCommState = %d)\n", ftStatus);
return 1;
}
if(ftnewDCB.BaudRate != ftDCB.BaudRate) {
printf("New baud rate does not match baud rate set\n");
}
ftTimouts.ReadIntervalTimeout = 0; // ignored by library
ftTimouts.ReadTotalTimeoutMultiplier = 0; // ignored by library
ftTimouts.ReadTotalTimeoutConstant = 1000; // 1 second
ftTimouts.WriteTotalTimeoutMultiplier = 0; // ignored by library
ftTimouts.WriteTotalTimeoutConstant = 1000; // 1 second
// 1 second for both read and write
if(FT_W32_SetCommTimeouts(ftHandle[i], &ftTimouts) == FALSE) {
ftStatus = FT_W32_GetLastError(ftHandle[i]);
printf("Error FT_W32_GetCommState = %d)\n", ftStatus);
return 1;
}
if(FT_W32_GetCommTimeouts(ftHandle[i], &ftnewTimouts) == FALSE) {
ftStatus = FT_W32_GetLastError(ftHandle[i]);
printf("Error FT_W32_GetCommState = %d)\n", ftStatus);
return 1;
}
else {
printf("ftTimouts.ReadIntervalTimeout = %d\n", ftTimouts.ReadIntervalTimeout);
printf("ftTimouts.ReadTotalTimeoutMultiplier = %d\n", ftTimouts.ReadTotalTimeoutMultiplier);
printf("ftTimouts.ReadTotalTimeoutConstant = %d\n", ftTimouts.ReadTotalTimeoutConstant);
printf("ftTimouts.WriteTotalTimeoutMultiplier = %d\n", ftTimouts.WriteTotalTimeoutMultiplier);
printf("ftTimouts.WriteTotalTimeoutConstant = %d\n", ftTimouts.WriteTotalTimeoutConstant);
}
for(j = 0 ; j < 10; j++) {
if(FT_W32_ReadFile(ftHandle[i], cBufWrite, BUF_SIZE, &dwBytesRead, NULL) == FALSE) {
ftStatus = FT_W32_GetLastError(ftHandle[i]);
gettimeofday(&tv, &tz);
printf("%d secs, %d usecs\n", tv.tv_sec, tv.tv_usec);
// printf("Error FT_W32_ReadFile = %d)\n", ftStatus);
// return 1;
}
else if(dwBytesRead != BUF_SIZE) {
gettimeofday(&tv, &tz);
printf("%d secs, %d usecs\n", tv.tv_sec, tv.tv_usec);
}
}
printf("dwBytesRead = %d\n", dwBytesRead);
}
iDevicesOpen = i;
/* Cleanup */
for(i = 0; i < iDevicesOpen; i++) {
if(FT_W32_CloseHandle(ftHandle[i]) == FALSE) {
ftStatus = FT_W32_GetLastError(ftHandle[i]);
printf("Error FT_W32_CloseHandle = %d, device = %d)\n", ftStatus, i);
}
printf("Closed device %s\n", cBufLD[i]);
}
if(pcBufRead)
free(pcBufRead);
return 0;
}
int dev_open_uart (int n_dev_indx, FT_HANDLE *ph_device)
{
FT_STATUS ft_status;
DWORD dw_num_devs;
LONG devLocation;
ft_status = FT_ListDevices(&dw_num_devs, NULL, FT_LIST_NUMBER_ONLY);
if (ft_status != FT_OK) return FALSE;
if (dw_num_devs == 0){
// No devices were found
return FALSE;
}
ft_status = FT_ListDevices((void*)n_dev_indx, &devLocation, FT_LIST_BY_INDEX | FT_OPEN_BY_LOCATION);
if (ft_status != FT_OK) {
return FALSE;
}
ft_status |= FT_ListDevices((void*)n_dev_indx, &devDescriptor, FT_LIST_BY_INDEX | FT_OPEN_BY_DESCRIPTION);
ft_status |= FT_ListDevices((void*)n_dev_indx, &devSerial, FT_LIST_BY_INDEX | FT_OPEN_BY_SERIAL_NUMBER);
if (ft_status != FT_OK){
return FALSE;
}
#define FT_Classic 0
#if FT_Classic
ft_status |= FT_OpenEx((void*)devLocation, FT_OPEN_BY_LOCATION, ph_device);
ft_status |= FT_SetTimeouts(*ph_device, 500, 500);
ft_status |= FT_SetLatencyTimer(*ph_device, 2);
// Divisor selection
// BAUD = 3000000 / Divisor
// Divisor = (N + 0.125, 0.25, 0.375, 0.5, 0.625, 0.75, 0.875)
// Divisor = 24 ==> Baud 125000
ft_status |= FT_SetDivisor(*ph_device, 3000000 / 125000);
// Set UART format 8N1
ft_status |= FT_SetDataCharacteristics(*ph_device, FT_BITS_8, FT_STOP_BITS_1, FT_PARITY_NONE);
if (ft_status != FT_OK){
return FALSE;
}
// Just in case
FT_Purge(*ph_device, FT_PURGE_TX | FT_PURGE_RX);
#else
// Open a device for overlapped I/O using its serial number
*ph_device = FT_W32_CreateFile(
(LPCTSTR)devLocation,
GENERIC_READ | GENERIC_WRITE,
0,
0,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED | FT_OPEN_BY_LOCATION,
0);
if (*ph_device == INVALID_HANDLE_VALUE)
{
// FT_W32_CreateDevice failed
return FALSE;
}
// ----------------------------------------
// --- Set comm parameters
// ----------------------------------------
FTDCB ftDCB;
FTTIMEOUTS ftTimeouts;
FTCOMSTAT ftPortStatus;
DWORD dw_port_error;
if (!FT_W32_GetCommState(*ph_device, &ftDCB))
{
return FALSE;
}
// Divisor selection
// BAUD = 3000000 / Divisor
// Divisor = (N + 0.125, 0.25, 0.375, 0.5, 0.625, 0.75, 0.875)
// Divisor = 24 ==> Baud 125000
ftDCB.BaudRate = 38400;
ftDCB.fBinary = TRUE; /* Binary Mode (skip EOF check) */
ftDCB.fParity = FALSE; /* Enable parity checking */
ftDCB.fOutxCtsFlow = FALSE; /* CTS handshaking on output */
ftDCB.fOutxDsrFlow = FALSE; /* DSR handshaking on output */
ftDCB.fDtrControl = DTR_CONTROL_DISABLE; /* DTR Flow control */
ftDCB.fTXContinueOnXoff = FALSE;
ftDCB.fErrorChar = FALSE; // enable error replacement
ftDCB.fNull = FALSE; // enable null stripping
ftDCB.fRtsControl = RTS_CONTROL_DISABLE; // RTS flow control
ftDCB.fAbortOnError = TRUE; // abort reads/writes on error
ftDCB.fOutX = FALSE; /* Enable output X-ON/X-OFF */
ftDCB.fInX = FALSE; /* Enable input X-ON/X-OFF */
ftDCB.fNull = FALSE; /* Enable Null stripping */
ftDCB.fRtsControl = RTS_CONTROL_DISABLE; /* Rts Flow control */
ftDCB.fAbortOnError = TRUE; /* Abort all reads and writes on Error */
// 8N1
ftDCB.ByteSize = 8; /* Number of bits/byte, 4-8 */
ftDCB.Parity = NOPARITY; /* 0-4=None,Odd,Even,Mark,Space */
ftDCB.StopBits = ONESTOPBIT; /* 0,1,2 = 1, 1.5, 2 */
if (!FT_W32_SetCommState(*ph_device, &ftDCB))
{
return FALSE;
}
FT_W32_GetCommState(*ph_device, &ftDCB);
// Set serial port Timeout values
FT_W32_GetCommTimeouts(*ph_device, &ftTimeouts);
ftTimeouts.ReadIntervalTimeout = 0;
ftTimeouts.ReadTotalTimeoutMultiplier = 0;
ftTimeouts.ReadTotalTimeoutConstant = 200;
ftTimeouts.WriteTotalTimeoutConstant = 0;
ftTimeouts.WriteTotalTimeoutMultiplier = 0;
FT_W32_SetCommTimeouts(*ph_device, &ftTimeouts);
FT_W32_ClearCommError(*ph_device, &dw_port_error, &ftPortStatus);
FT_W32_PurgeComm(*ph_device, PURGE_TXCLEAR | PURGE_RXCLEAR | PURGE_RXABORT | PURGE_TXABORT);
#endif // End of W32 device init
return TRUE;
}