FTDI LibFT4222 - I 2 C Master Write

Application Note
AN_329 User Guide For LibFT4222
Version 1.5
Document Reference No.: FT_001060 Clearance No.: FTDI#406
48
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Error code:
FT4222_DEVICE_NOT_OPENED: The initialization API is not called.
FT4222_IS_NOT_I2C_MODE: The device is not in i2c slave mode
FT4222_INVALID_POINTER: Parameter buffer is NULL
FT4222_INVALID_PARAMETER: bytesToRead is equal to zero
FT4222_FAILED_TO_READ_DEVICE: Failed to read data.
Prerequisite:
FT4222_I2CMaster_Init
Example:
FT_HANDLE ftHandle = NULL;
FT_STATUS ftStatus;
FT4222_STATUS ft4222Status;
ftStatus = FT_Open(0, &ftHandle);
if (FT_OK != ftStatus)
{
// open failed
return;
}
// initial i2c master with 1000K bps
ft4222Status = FT4222_I2CMaster_Init(ftHandle, 1000);
if (FT4222_OK != ft4222Status)
{
// i2c master init failed
return;
}
const uint16 slaveAddr = 0x22;
uint8 slave_data[4];
uint16 sizeTransferred = 0;
// read 4 bytes data from master
ft4222Status = FT4222_I2CMaster_Read(ftHandle, slaveAddr, slave_data, sizeof(slave_data),
&sizeTransferred);
if (FT4222_OK == ft4222Status)
{
// read data success
}
else
{
// read data failed
}
FT4222_UnInitialize(ftHandle);
FT_Close(ftHandle);
3.6.3 I
2
C Master Write
FT4222_STATUS FT4222_I2CMaster_Write(FT_HANDLE ftHandle, uint16 slaveAddress, uint8*
buffer, uint16 bytesToWrite, uint16* sizeTransferred)
Supported Chip:
FT4222 chip version
Supported
FT4222 Rev A
YES
FT4222 Rev B
YES