nrf_semmc_cmd_prepare()

nrf_semmc_error_t nrf_semmc_cmd_prepare	(	nrf_semmc_t const *	p_semmc,
		nrf_semmc_cmd_desc_t *	p_cmd,
		nrf_semmc_config_t const *	p_config,
		nrf_semmc_transfer_desc_t *	p_transfer,
		size_t	cmd_count )

#include <softperipheral/sEMMC/include/nrf_semmc.h>

prepare to start an asynchronous command.

This function is an equivalent of nrf_semmc_cmd with NRF_SEMMC_FLAG_HOLD_XFER flag set.

The start of the prepared transfer must be triggered outside of this function.

See also

nrf_semmc_start_task_address_get

If the controller mode transfer is in progress, a new transfer can be requested. If the driver is capable of queueing the requested transfer, the function returns NRF_SEMMC_SUCCESS. If not, it returns NRF_SEMMC_ERROR_BUSY. If the target mode transfer is idle waiting for the remote controller, new transfer requests abort the idling transfer and the nrf_semmc_event_handler_t is called to indicate aborted transfer. If the target mode transfer is activated by the remote controller, a new requested transfer can be queued by the driver. If the driver is capable of queuing the new transfer, the function returns NRF_SEMMC_SUCCESS. Otherwise, it returns NRF_SEMMC_ERROR_BUSY.

Parameters

p_semmc	Pointer to the eMMC driver instance.
p_cmd	Pointer to the command descriptor structure.
p_config	Pointer to the configuration structure.
p_transfer	Pointer to the transfer descriptor structure.
cmd_count	Number of transfers in the array pointed by p_cmd.

Return values

NRF_SEMMC_SUCCESS	The transfer is prepared
NRF_SEMMC_ERROR_BUSY	There is ongoing transfer