DlnSpiSlaveSetFrameSize() Function

The DlnSpiSlaveSetFrameSize() function sets the size of a single SPI data frame.

Syntax

C/C++

DLN_RESULT DlnSpiSlaveSetFrameSize(
   HDLN handle,
   uint8_t port,
   uint8_t frameSize
);

Parameters

handle: A handle to the DLN-series adapter.
port: A number of the SPI slave port.
frameSize: A number of bits to be transmitted during the single frame. The DLN-series adapter supports 8 to 16 bits per frame.

The frameSize parameter does not limit the size of the buffer transmitted to/from the SPI slave device, it only defines the minimum portion of data in this buffer.

Return Value

DLN_RES_SUCCESS (0x00): The function successfully specified the frame size.
DLN_RES_INVALID_PORT_NUMBER (0xA8): The port number is not valid. Use the DlnSpiSlaveGetPortCount() function to find the maximum possible port number.
DLN_RES_SPI_INVALID_FRAME_SIZE (0xB8): The frame size is not valid. The DLN-series adapters support 8 to 16 bits per transmission.
DLN_RES_BUSY (0xB6): The SPI slave is busy transmitting. The frame size cannot be changed.

Remarks

The DlnSpiSlaveSetFrameSize() function is defined in the dln_spi_slave.h file.

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