FTDI LibFT4222 - SPI Reset

Application Note
AN_329 User Guide For LibFT4222
Version 1.5
Document Reference No.: FT_001060 Clearance No.: FTDI#406
44
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Parameters:
ftHandle
Handle of the device.
spiIdx
The index of the SPI transaction, which ranges from 0~3 depending on the mode
of the chip. For example, under mode 0 and mode 3 as we mentioned in chapter
1.1, it should be 0 because there is only one SPI master or slave connection, and
so forth.
Return Value:
FT4222_OK if successful, otherwise the return value is an FT error code.
Error code:
FT4222_DEVICE_NOT_OPENED: The initialization API is not called.
FT4222_INVALID_PARAMETER: Parameter spiIdx is incorrect. It must depend on mode of chip.
Prerequisite:
FT4222_SPISlave_InitEx or FT4222_SPISlave_Init or FT4222_SPIMaster_Init
Example:
FT_HANDLE ftHandle = NULL;
FT_STATUS ftStatus;
FT4222_STATUS ft4222Status;
ftStatus = FT_OpenEx("FT4222 A",FT_OPEN_BY_DESCRIPTION, &ftHandle);
if (FT_OK != ftStatus)
{
// open failed
return;
}
if (FT4222_OK != FT4222_SPISlave_InitEx(ftHandle, SPI_SLAVE_NO_PROTOCOL))
{
// init spi slave failed
return;
}
//clear TX / RX cache
if (FT4222_OK != FT4222_SPI_ResetTransaction(ftHandle, 0))
{
// purge usb tx/rx and SPI FIFO cache
return;
}
// read/write data to a SPI slave
FT4222_UnInitialize(ftHandle);
FT_Close(ftHandle);
3.5.2 SPI Reset
FT4222_STATUS FT4222_SPI_Reset (FT_HANDLE ftHandle)
Supported Chip:
FT4222 chip version
Supported
FT4222 Rev A
YES
FT4222 Rev B
YES
FT4222 Rev C
YES
FT4222 Rev D
YES