DLN_I2C_SLAVE_GET_EVENT Command and Response

The DLN_I2C_SLAVE_GET_EVENT command is used to retrieve currently set event generation conditions for the specified I2C slave port.

DLN_I2C_SLAVE_GET_EVENT Command

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 typedef struct
 {
    DLN_MSG_HEADER header;
    uint8_t port;
    uint8_t slaveAddressNumber;
 } __PACKED_ATTR DLN_I2C_SLAVE_GET_EVENT_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_I2C_SLAVE_GET_EVENT_CMD structure.
msgId	Identifies the message. For the DLN_I2C_SLAVE_GET_EVENT command it must be set to 0x0B0С. You can use the DLN_MSG_ID_I2С_SLAVE_GET_EVENT 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 I2С slave port to retrieve the information from.

slaveAddressNumber

A number of the I2C slave address, assigned to your DLN-series adapter.

DLN_I2C_SLAVE_GET_EVENT Response

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The adapter sends the DLN_I2C_SLAVE_GET_EVENT response after the DLN_I2C_SLAVE_GET_EVENT command execution. The response contains current event generation conditions for the specified I2C slave port.

 typedef struct
 {
    DLN_MSG_HEADER header;
    DLN_RESULT result;
    uint8_t eventType;
 } __PACKED_ATTR DLN_I2C_SLAVE_GET_EVENT_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_I2C_SLAVE_GET_EVENT_RSP structure.
msgId	Contains the message id. For the DLN_I2C_SLAVE_GET_EVENT response it is set to 0x0B0С. The DLN_MSG_ID_I2С_SLAVE_GET_EVENT 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_I2C_SLAVE_GET_EVENT command DLN-series adapter can return the following result values:

Return Code	Description
DLN_RES_SUCCESS	The event generation conditions have been successfully retrieved.

eventType

Must contain the condition for event generation on the I2C slave port. The following values are available:

0 or I2C_SLAVE_EVENT_NONE	no events are generated for the current port;
1 or I2C_SLAVE_EVENT_READ	events are generated when a master device starts reading data sent by a slave via I2C bus
2 or I2C_SLAVE_EVENT_WRITE	events are generated when a master device starts sending data to a slave via I2C bus
3 or I2C_SLAVE_EVENT_READ_WRITE	events are generated when a master device starts either reading or sending data via I2C interface

DLN_I2C_SLAVE_GET_EVENT Command and Response