U2C_RESULT U2C_Read(
HANDLE hDevice,
PU2C_TRANSACTION pTransaction
);
The U2C_Read function() reads up to 256 bytes from the I2C slave device.
Parameters:
- hDevice
Handle to the U2C-12 device.
- pTransaction
Pointer to the U2C_TRANSACTION structure to be used during the I2C read transaction. Before calling the function this structure has to be partially filled:
After successful completion of the read operation Buffer member of the structure will be filled with data read from I2C slave device.- nSlaveDeviceAddress - must contain the I 2 C slave device address.
- nMemoryAddressLength - must contain the internal address length (in bytes from 0 up to 4). If nMemoryAddressLength is equal to 0, no address will be sent to device and repeated I 2 C start condition won't be generated.
- MemoryAddress - must contain the internal I 2 C slave device address.
- nBufferLength - must contain the number of bytes to be read from the I 2 C slave device.
Return values:
U2C_SUCCESS
The data was successfully read.
U2C_HARDWARE_NOT_FOUND
U2C-12 device referenced by hDevice handle was not found.
U2C_SLAVE_OPENNING_FOR_WRITE_FAILED
I2C slave device did not acknowledge write slave address.
U2C_SLAVE_OPENNING_FOR_READ_FAILED
I2C slave device did not acknowledge read slave address.
U2C_SENDING_MEMORY_ADDRESS_FAILED
I2C slave device did not acknowledge internal address.