DLN_SPI_SLAVE_TRANSFER_EV Event

The DLN_SPI_SLAVE_TRANSFER_EV event is sent when the SPI bus master releases the SS line or the data receive buffer is full.

 typedef struct
 {
    DLN_MSG_HEADER header;
    uint16_t eventCount;
    uint8_t eventType;
    uint8_t port;
    uint16_t size;
    uint8_t buffer[DLN_SPI_SLAVE_BUFFER_SIZE];
 } __PACKED_ATTR DLN_SPI_SLAVE_TRANSFER_EV;

Members:

header

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

Field	Description
size	The size of the message. It is equal to the size of the DLN_SPI_SLAVE_TRANSFER_EV structure.
msgId	Contains the event id. For the DLN_SPI_SLAVE_TRANSFER_EV event it is set to 0x0B10. The DLN_MSG_ID_SPI_SLAVE_TRANSFER_EV constant can be used to check the event ID.
echoCounter	Number of events sent since the DLN-series adapter is powered on. This counter increments on every event (not only on DLN_MSG_ID_SPI_SLAVE_TRANSFER_EV event). See eventCount member to get the number of DLN_MSG_ID_SPI_SLAVE_TRANSFER_EV events sent after the SPI slave module is configured.
handle	A handle to the DLN-series adapter. You can use the handle field to determine the adapter that have sent the event.

eventCount

The number of the generated events after SPI slave configuration is changed.

eventType

The condition for event generation on the SPI-slave port. The eventType member can contain the following values:

1 or SPI_SLAVE_EVENT_SS_RISE	The event is generated when an SS line is released.
2 or SPI_SLAVE_EVENT_SS_BUFFER_FULL	The event is generated when the allocated buffer becomes full.

port

A number of the SPI slave port.

size

A size of the buffer that stores the event data. This parameter is specified in bytes. The maximum value us 256 bytes.

buffer

A 256-element array. Each of the elements is an 8-bit value. The buffer contains the event data.