DlnI2cMasterTransfer() Function

The DlnI2cMasterTransfer() function sends and receives data via the I²C bus. The data is sent and received as an array of 1-byte elements.

Syntax

C/C++

DLN_RESULT DlnI2cMasterTransfer(
    HDLN handle, 
    uint8_t port, 
    uint8_t slaveDeviceAddress, 
    uint16_t writeLength, 
    uint16_t readLength, 
    uint8_t *writeBuffer, 
    uint8_t *readBuffer
);

Parameters

handle: A handle to the DLN-series adapter.
port: A number of the I²C master port.
slaveDeviceAddress: The I²C slave device address value.
writeLength: The length of data that should be written to the slave device.
readLength: The length of data that should be read from the slave device.
writeBuffer: A pointer to an array of unsigned 8-bit integers that receives data to be sent to the slave during the function execution.
readBuffer: A pointer to an array of unsigned 8-bit integers that receives data from the slave during the function execution.

Return Value

DLN_RES_SUCCESS (0x00): The function transmitted data via the I²C bus successfully.
DLN_RES_INVALID_PORT_NUMBER (0xA8): The port number is not valid. Use the DlnI2cMasterGetPortCount() function to find the maximum possible port number.
DLN_RES_DISABLED (0xB7): The function transmit data via the I²C bus because the specified I²C master port is not active. Use the DlnI2cMasterEnable()function to activate the I²C master port.
DLN_RES_INVALID_BUFFER_SIZE (0xAE): The specified buffer size is not valid.

Remarks

DLN-4 adapters do not support this function.

The DlnI2cMasterTransfer() function is defined in the dln_i2c_master.h file.

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