Multiprotocol
RAIL API

Multiprotocol scheduler APIs to support multiple time-sliced PHYs.

Modules

EFR32
EFR32-specific multiprotocol support defines.

Data Structures

struct RAIL_SchedulerInfo_t
A structure to hold information used by the scheduler.

Enumerations

enum RAIL_SchedulerStatus_t {
RAIL_SCHEDULER_STATUS_NO_ERROR ,
RAIL_SCHEDULER_STATUS_UNSUPPORTED ,
RAIL_SCHEDULER_STATUS_EVENT_INTERRUPTED ,
RAIL_SCHEDULER_STATUS_SCHEDULE_FAIL ,
RAIL_SCHEDULER_STATUS_SCHEDULED_TX_FAIL ,
RAIL_SCHEDULER_STATUS_SINGLE_TX_FAIL ,
RAIL_SCHEDULER_STATUS_CCA_CSMA_TX_FAIL ,
RAIL_SCHEDULER_STATUS_CCA_LBT_TX_FAIL ,
RAIL_SCHEDULER_STATUS_SCHEDULED_RX_FAIL ,
RAIL_SCHEDULER_STATUS_TX_STREAM_FAIL ,
RAIL_SCHEDULER_STATUS_AVERAGE_RSSI_FAIL ,
RAIL_SCHEDULER_STATUS_INTERNAL_ERROR
}
Multiprotocol scheduler status returned by RAIL_GetSchedulerStatus() .
enum RAIL_TaskType_t {
RAIL_TASK_TYPE_START_RX ,
RAIL_TASK_TYPE_OTHER
}
Multiprotocol radio operation task types, used with RAIL_SetTaskPriority.

Functions

void RAIL_YieldRadio ( RAIL_Handle_t railHandle)
Yields the radio to other configurations.
RAIL_SchedulerStatus_t RAIL_GetSchedulerStatus ( RAIL_Handle_t railHandle)
Gets the status of the RAIL scheduler.
RAIL_Status_t RAIL_SetTaskPriority ( RAIL_Handle_t railHandle, uint8_t priority, RAIL_TaskType_t taskType)
Change the priority of a specified task type in multiprotocol.
RAIL_Time_t RAIL_GetTransitionTime (void)
Get time needed to switch between protocols.
void RAIL_SetTransitionTime ( RAIL_Time_t transitionTime)
Set time needed to switch between protocols.

Detailed Description

Multiprotocol scheduler APIs to support multiple time-sliced PHYs.

Enumeration Type Documentation

enum RAIL_SchedulerStatus_t

Multiprotocol scheduler status returned by RAIL_GetSchedulerStatus() .

Enumerator
RAIL_SCHEDULER_STATUS_NO_ERROR

Multiprotocol scheduler reports no error.

RAIL_SCHEDULER_STATUS_UNSUPPORTED

The scheduler is disabled or the requested scheduler operation is unsupported.

RAIL_SCHEDULER_STATUS_EVENT_INTERRUPTED

The scheduled event was started but was interrupted by a higher-priority event before it could be completed.

RAIL_SCHEDULER_STATUS_SCHEDULE_FAIL

This task could not be scheduled given its priority and the other tasks running on the system.

RAIL_SCHEDULER_STATUS_SCHEDULED_TX_FAIL

Calling the scheduled transmit function returned an error code.

See RAIL_StartScheduledTx() for more information about possible errors.

RAIL_SCHEDULER_STATUS_SINGLE_TX_FAIL

Calling the start transmit function returned an error code.

See RAIL_StartTx() for more information about possible errors.

RAIL_SCHEDULER_STATUS_CCA_CSMA_TX_FAIL

Calling the CSMA transmit function returned an error code.

See RAIL_StartCcaCsmaTx() for more information about possible errors.

RAIL_SCHEDULER_STATUS_CCA_LBT_TX_FAIL

Calling the LBT transmit function returned an error code.

See RAIL_StartCcaLbtTx() for more information about possible errors.

RAIL_SCHEDULER_STATUS_SCHEDULED_RX_FAIL

Calling the scheduled receive function returned an error code, which means that the hardware was not set up in time for this receive.

RAIL_SCHEDULER_STATUS_TX_STREAM_FAIL

Calling the stream transmit function returned an error code.

See RAIL_StartTxStream() for more information about possible errors.

RAIL_SCHEDULER_STATUS_AVERAGE_RSSI_FAIL

RSSI averaging failed.

If this scheduler status occurs, RAIL_GetAverageRssi() will return RAIL_RSSI_INVALID until a RAIL_StartAverageRssi() completes successfully.

RAIL_SCHEDULER_STATUS_INTERNAL_ERROR

An internal error occurred in scheduler data structures, which should not happen and indicates a problem.

Definition at line 381 of file rail_types.h .

enum RAIL_TaskType_t

Multiprotocol radio operation task types, used with RAIL_SetTaskPriority.

Enumerator
RAIL_TASK_TYPE_START_RX

Indicates a task started using RAIL_StartRx.

RAIL_TASK_TYPE_OTHER

Indicates a task started functions other than RAIL_StartRx.

Definition at line 464 of file rail_types.h .

Function Documentation

RAIL_SchedulerStatus_t RAIL_GetSchedulerStatus ( RAIL_Handle_t railHandle )

Gets the status of the RAIL scheduler.

Parameters
[in] railHandle A RAIL instance handle.
Returns
RAIL_SchedulerStatus_t status.

This function can only be called from a callback context after the RAIL_EVENT_SCHEDULER_STATUS event occurs.

RAIL_Time_t RAIL_GetTransitionTime ( void )

Get time needed to switch between protocols.

Returns
RAIL_Time_t Time needed to switch between protocols.
RAIL_Status_t RAIL_SetTaskPriority ( RAIL_Handle_t railHandle,
uint8_t priority,
RAIL_TaskType_t taskType
)

Change the priority of a specified task type in multiprotocol.

Parameters
[in] railHandle A RAIL instance handle.
[in] priority Desired new priority for the railHandle's active task
[in] taskType Type of task whose priority should be updated
Returns
RAIL_Status_t indicating success of the function call.

While the application can use this function however it likes, a major use case is being able to increase an infinite receive priority while receiving a packet. In other words, a given RAIL_Handle_t can maintain a very low priority background receive, but upon getting a RAIL_EVENT_RX_SYNC1_DETECT_SHIFT or RAIL_EVENT_RX_SYNC2_DETECT_SHIFT event, the app can call this function to increase the background RX priority to lower the risk another protocol might preempt during packet reception.

void RAIL_SetTransitionTime ( RAIL_Time_t transitionTime )

Set time needed to switch between protocols.

Parameters
[in] transitionTime Time needed to switch between protocols.
void RAIL_YieldRadio ( RAIL_Handle_t railHandle )

Yields the radio to other configurations.

Parameters
[in] railHandle A RAIL instance handle.
Returns
void.

This function is used to indicate that the previous transmit or scheduled receive operation has completed. It must be used in multiprotocol RAIL since the scheduler assumes that any transmit or receive operation that is started can go on indefinitely based on state transitions and your protocol. RAIL will not allow a lower priority tasks to run until this is called so it can negatively impact performance of those protocols if this is omitted or delayed. It is also possible to simply call the RAIL_Idle() API to both terminate the operation and idle the radio. In single-protocol RAIL this API does nothing.

See Yielding the radio for more details.