(FTC_HANDLE ftHandle, DWORD dwClockDivisor, LPDWORD lpdwClockFrequencyHz)
Handle of the device.
Specifies a clock divisor which will be used to set the frequency for clocking data in and out of the FT2232C device.
Pointer to a variable of type DWORD which receives the actual frequency in Hz that data will be clocked in and out of the FT2232C device at.
FTC_SUCCESS if successful, otherwise the return value is one of the following FTC error codes:
The valid range for dwClockDivisor is 0 to 65535. The highest clock frequency is represented by 0 which is equivalent to 6MHz and the lowest clock frequency is represented by 65535 which is equivalent to 91Hz. This can be calculated using the following formula:
dwClockFrequency = 12MHz / ((1 + dwClockDivisor) * 2)
SPI_SetClock will return the actual frequency in Hz for the current divisor value. The clock frequancy in Hz can also be calculated using SPI_GetClock.
FTC_STATUS Status = FTC_SUCCESS;
DWORD dwClockDivisor = 0;
DWORD dwClockFrequencyHz = 0;
Status = SPI_SetClock(ftHandle, dwClockDivisor, &dwClockFrequencyHz);