esp_idf_sys

Function spi_slave_get_trans_result

Source 
pub unsafe extern "C" fn spi_slave_get_trans_result(
    host: spi_host_device_t,
    trans_desc: *mut *mut spi_slave_transaction_t,
    ticks_to_wait: TickType_t,
) -> esp_err_t
Expand description

@brief Get the result of a SPI transaction queued earlier

This routine will wait until a transaction to the given device (queued earlier with spi_slave_queue_trans) has successfully completed. It will then return the description of the completed transaction so software can inspect the result and e.g. free the memory or reuse the buffers.

It is mandatory to eventually use this function for any transaction queued by spi_slave_queue_trans.

@param host SPI peripheral to that is acting as a slave @param[out] trans_desc Pointer to variable able to contain a pointer to the description of the transaction that is executed @param ticks_to_wait Ticks to wait until there’s a returned item; use portMAX_DELAY to never time out. @return - ESP_ERR_INVALID_ARG if parameter is invalid - ESP_ERR_NOT_SUPPORTED if flag SPI_SLAVE_NO_RETURN_RESULT is set - ESP_OK on success