SPI RxData event not found in S32K344

[Hareesh]

Hi NXP team,

We are using S32K344 EVK board and S32 design studio 3.5.

We configured a simple LPSPI driver to transfer and receive the data through SPI communication.

The ISR has the following event checking options:

typedef enum
{
    LPSPI_IP_EVENT_END_TRANSFER = 0, /**< The transfer is successfully done. */
    LPSPI_IP_EVENT_FAULT = 1         /**< The transfer failed due to overflow/underflow. */
} Lpspi_Ip_EventType;

Nevertheless, the ISR does not provide event checking for received data.

How can we obtain the interrupt each time a slave device sends data to us?

Best regards,

Hareesh

[Robin_Shen]

Hi Hareesh,

Please refer to the discussion in SPI Lpspi_Ip_AsyncTransmit not work

as I wrote, for async function you need to wait for end of transfer. Function just prepare transmission/reception and leave. So either you will check module status using Lpspi_Ip_GetStatus, it returns IDLE after transfer is finished. Or if you define callback within Async function, this callback will be called with event LPSPI_IP_EVENT_END_TRANSFER after transfer is done.

If the TX data are don't care, customer can use half duplex transfers. There is an api for that Lpspi_Ip_AsyncTransmitHalfDuplex TransferType=LPSPI_IP_HALF_DUPLEX_RECEIVE, also examples are available in the RTD (Lpspi_Ip_HalfDuplexTransfer_S32K344).

Best Regards,
Robin
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