DLN_SPI_SLAVE_SET_MODE Command and Response

The DLN_SPI_SLAVE_SET_MODE command is used to set SPI transmission parameters (CPOL and CPHA).

DLN_SPI_SLAVE_SET_MODE Command

 typedef struct
 {
    DLN_MSG_HEADER header;
    uint8_t port;
    uint8_t mode;
 }__PACKED_ATTR DLN_SPI_SLAVE_SET_MODE_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_MODE_CMD structure.
msgId	Identifies the message. For the DLN_SPI_SLAVE_SET_MODE command it must be set to 0x0B04. You can use the DLN_MSG_ID_SPI_SLAVE_SET_MODE 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 apply configuration to.

mode

A bit field consisting of 8 bits. The bits 0 and 1 correspond to CPOL and CPHA parameters respectively and define the SPI slave mode. The rest of the bits are not used. You can also use special constants, defined in the dln_spi_slave.h file for each of the bits.

Bit	Value	Description	Constant
0	0	CPOL=0	DLN_SPI_SLAVE_CPOL_0
0	1	CPOL=1	DLN_SPI_SLAVE_CPOL_1
1	0	CPHA=0	DLN_SPI_SLAVE_CPHA_0
1	1	CPHA=1	DLN_SPI_SLAVE_CPHA_1

DLN_SPI_SLAVE_SET_MODE Response

Go to command

The adapter sends the DLN_SPI_SLAVE_SET_MODE response after the DLN_SPI_SLAVE_SET_MODE command execution. The result field informs a user whether the configuration has been successfully changed.

 typedef struct
 {
    DLN_MSG_HEADER header;
    DLN_RESULT result;
 }__PACKED_ATTR DLN_SPI_SLAVE_SET_MODE_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_MODE_RSP structure.
msgId	Contains the message id. For the DLN_SPI_SLAVE_SET_MODE response it is set to 0x0B04. The DLN_MSG_ID_SPI_SLAVE_SET_MODE 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_MODE command DLN-series adapter can return the following result values:

Return Code	Description
DLN_RES_SUCCESS	The configuration has been successfully set.

DLN_SPI_SLAVE_SET_MODE Command and Response