DLN_SPI_SLAVE_SET_FRAME_SIZE Command and Response

The DLN_SPI_SLAVE_SET_FRAME_SIZE command is used to set the size of a single portion of data transferred via SPI.

DLN_SPI_SLAVE_SET_FRAME_SIZE Command

 typedef struct
 {
    DLN_MSG_HEADER header;
    uint8_t port;
    uint8_t frameSize;
 } __PACKED_ATTR DLN_SPI_SLAVE_SET_FRAME_SIZE_CMD;

Parameters:

header

Defines the DLN message header DLN_MSG_HEADER. The header contains several predefined fields and is used to identify and route messages. You must fill the following fields before sending the command:

Field	Description
size	The size of the message. Must be equal to the size of the DLN_SPI_SLAVE_SET_FRAME_SIZE_CMD structure.
msgId	Identifies the message. For the DLN_SPI_SLAVE_SET_FRAME_SIZE command it must be set to 0x0B06. You can use the DLN_MSG_ID_SPI_SLAVE_SET_FRAME_SIZE constant.
echoCounter	Can be used to link a command to a response. The response will have the same echoCounter value. This field can be any numerical value from 0 to 0xFFFF (65536).
handle	A handle to the DLN-series adapter.

port

A number of the SPI slave port to be configured.

frameSize

A number of bytes to be transferred, specified in bits. The DLN-series adapter supports 8 to 16 bits per frame.

DLN_SPI_SLAVE_SET_FRAME_SIZE Response

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The adapter sends the DLN_SPI_SLAVE_SET_FRAME_SIZE response after the DLN_SPI_SLAVE_SET_FRAME_SIZE command execution. The response informs a user if the frame size has been successfully set.

 typedef struct
 {
    DLN_MSG_HEADER header;
    DLN_RESULT result;
 } __PACKED_ATTR DLN_SPI_MASTER_SET_FRAME_SIZE_RSP;

Parameters:

header

Defines the DLN message header DLN_MSG_HEADER. The response header contains the following fields:

Field	Description
size	The size of the message. It is equal to the size of the DLN_SPI_SLAVE_SET_FRAME_SIZE_RSP structure.
msgId	Contains the message id. For the DLN_SPI_SLAVE_SET_FRAME_SIZE response it is set to 0x0B06. The DLN_MSG_ID_SPI_SLAVE_SET_FRAME_SIZE constant can be used to check the message ID.
echoCounter	Links a command to a response. The echoCounter value is copied from the respective command header.
handle	A handle to the DLN-series adapter. You can use the handle field to determine the adapter that have sent the response.

result

Contains the result of the command execution. For DLN_SPI_SLAVE_SET_FRAME_SIZE command DLN-series adapter can return the following result values:

Return Code	Description
DLN_RES_SUCCESS	The number of bits per frame has been successfully set.

DLN_SPI_SLAVE_SET_FRAME_SIZE Command and Response