Transmit#

RAIL_StopMode_t#

RAIL_StopMode_t

Stop radio operation options bit mask.

RAIL_TxOptions_t#

RAIL_TxOptions_t

Transmit options, in reality a bitmask.

RAIL_ScheduledTxDuringRx_t#

RAIL_ScheduledTxDuringRx_t

Enumerates the possible outcomes of what will occur if a scheduled TX ends up firing during RX.

Because RX and TX can't happen at the same time, it is up to the user how the TX should be handled. This enumeration is passed into RAIL_StartScheduledTx() as part of RAIL_ScheduleTxConfig_t.

RAIL_TxRepeatOptions_t#

RAIL_TxRepeatOptions_t

Transmit repeat options, in reality a bitmask.

RAIL_StopTx#

RAIL_Status_t RAIL_StopTx (RAIL_Handle_t railHandle, RAIL_StopMode_t mode)

Stop an active or pending transmit.

Returns

• RAIL_STATUS_NO_ERROR if the transmit was successfully stopped or RAIL_STATUS_INVALID_STATE if there is no transmit operation to stop.

Note

• When mode includes RAIL_STOP_MODE_ACTIVE, this can also stop an active auto-ACK transmit. When an active transmit is stopped, RAIL_EVENT_TX_ABORTED or RAIL_EVENT_TXACK_ABORTED should occur. When mode includes RAIL_STOP_MODE_PENDING this can also stop a RAIL_TX_OPTION_CCA_ONLY transmit operation. When a pending transmit is stopped, RAIL_EVENT_TX_BLOCKED should occur.

RAIL_SetCcaThreshold#

RAIL_Status_t RAIL_SetCcaThreshold (RAIL_Handle_t railHandle, int8_t ccaThresholdDbm)

Set the CCA threshold in dBm.

Returns

• Status code indicating success of the function call.

Unlike RAIL_StartCcaCsmaTx() or RAIL_StartCcaLbtTx(), which can cause a transmit, this function only modifies the CCA threshold. A possible use case for this function involves setting the CCA threshold to invalid RSSI of -128 which blocks transmission by preventing clear channel assessments from succeeding.

RAIL_GetTxPacketDetails#

RAIL_Status_t RAIL_GetTxPacketDetails (RAIL_Handle_t railHandle, RAIL_TxPacketDetails_t * pPacketDetails)

Get detailed information about the last packet transmitted.

Returns

• RAIL_STATUS_NO_ERROR if pPacketDetails was filled in, or an appropriate error code otherwise.

Note

• Consider using RAIL_GetTxPacketDetailsAlt2 for smaller code size.

This function can only be called from callback context for either RAIL_EVENT_TX_PACKET_SENT or RAIL_EVENT_TXACK_PACKET_SENT events.

RAIL_GetTxPacketDetailsAlt#

RAIL_Status_t RAIL_GetTxPacketDetailsAlt (RAIL_Handle_t railHandle, bool isAck, RAIL_Time_t * pPacketTime)

Get detailed information about the last packet transmitted.

Returns

• RAIL_STATUS_NO_ERROR if pPacketTime was filled in, or an appropriate error code otherwise.

Note

• Consider using RAIL_GetTxPacketDetailsAlt2 to pass in a RAIL_PacketTimeStamp_t structure instead of a RAIL_Time_t structure, particularly when RAIL_PacketTimePosition_t information is needed or useful.

This function can only be called from callback context for either RAIL_EVENT_TX_PACKET_SENT or RAIL_EVENT_TXACK_PACKET_SENT events.

RAIL_GetTxPacketDetailsAlt2#

RAIL_Status_t RAIL_GetTxPacketDetailsAlt2 (RAIL_Handle_t railHandle, RAIL_TxPacketDetails_t * pPacketDetails)

Get detailed information about the last packet transmitted.

Returns

• RAIL_STATUS_NO_ERROR if pPacketDetails was filled in, or an appropriate error code otherwise.

This function can only be called from callback context for either RAIL_EVENT_TX_PACKET_SENT or RAIL_EVENT_TXACK_PACKET_SENT events.

RAIL_GetTxTimePreambleStart#

RAIL_Status_t RAIL_GetTxTimePreambleStart (RAIL_Handle_t railHandle, uint16_t totalPacketBytes, RAIL_Time_t * pPacketTime)

Adjust a RAIL TX completion timestamp to refer to the start of the preamble.

Also used to retrieve the RAIL_EVENT_TX_STARTED timestamp.

Returns

• RAIL_STATUS_NO_ERROR if pPacketTime was successfully determined or an appropriate error code otherwise.

When used for timestamp adjustment, call this function in the same transmit-complete event-handling context as RAIL_GetTxPacketDetailsAlt() is called.

This function may be called when handling the RAIL_EVENT_TX_STARTED event to retrieve that event's start-of-normal-TX timestamp. (ACK transmits currently have no equivalent event or associated timestamp.) In this case, totalPacketBytes must be RAIL_TX_STARTED_BYTES, and pPacketTime is an output-only parameter filled in with that time (so no need to initialize it beforehand by calling RAIL_GetTxPacketDetailsAlt()).

RAIL_GetTxTimePreambleStartAlt#

RAIL_Status_t RAIL_GetTxTimePreambleStartAlt (RAIL_Handle_t railHandle, RAIL_TxPacketDetails_t * pPacketDetails)

Adjust a RAIL TX completion timestamp to refer to the start of the preamble.

Also used to retrieve the RAIL_EVENT_TX_STARTED timestamp.

Returns

• RAIL_STATUS_NO_ERROR if the packet time was successfully calculated, or an appropriate error code otherwise.

When used for timestamp adjustment, call this function in the same transmit-complete event-handling context as RAIL_GetTxPacketDetailsAlt2() is called.

This function may be called when handling the RAIL_EVENT_TX_STARTED event to retrieve that event's start-of-normal-TX timestamp. (ACK transmits currently have no equivalent event or associated timestamp.) In this case, the timeSent field totalPacketBytes must be RAIL_TX_STARTED_BYTES, and the timeSent field packetTime is an output-only parameter filled in with that time (so no need to initialize it beforehand by calling RAIL_GetTxPacketDetailsAlt2()).

RAIL_GetTxTimeSyncWordEnd#

RAIL_Status_t RAIL_GetTxTimeSyncWordEnd (RAIL_Handle_t railHandle, uint16_t totalPacketBytes, RAIL_Time_t * pPacketTime)

Adjust a RAIL TX timestamp to refer to the end of the sync word.

Returns

• RAIL_STATUS_NO_ERROR if pPacketTime was successfully calculated, or an appropriate error code otherwise.

Call the timestamp adjustment function in the same transmit-complete event-handling context as RAIL_GetTxPacketDetailsAlt() is called.

RAIL_GetTxTimeSyncWordEndAlt#

RAIL_Status_t RAIL_GetTxTimeSyncWordEndAlt (RAIL_Handle_t railHandle, RAIL_TxPacketDetails_t * pPacketDetails)

Adjust a RAIL TX timestamp to refer to the end of the sync word.

Returns

• RAIL_STATUS_NO_ERROR if the packet time was successfully calculated, or an appropriate error code otherwise.

Call the timestamp adjustment function in the same transmit-complete event-handling context as RAIL_GetTxPacketDetailsAlt2() is called.

RAIL_GetTxTimeFrameEnd#

RAIL_Status_t RAIL_GetTxTimeFrameEnd (RAIL_Handle_t railHandle, uint16_t totalPacketBytes, RAIL_Time_t * pPacketTime)

Adjust a RAIL TX timestamp to refer to the end of frame.

Returns

• RAIL_STATUS_NO_ERROR if pPacketTime was successfully calculated, or an appropriate error code otherwise.

Call the timestamp adjustment function in the same transmit-complete event-handling context as RAIL_GetTxPacketDetailsAlt() is called.

RAIL_GetTxTimeFrameEndAlt#

RAIL_Status_t RAIL_GetTxTimeFrameEndAlt (RAIL_Handle_t railHandle, RAIL_TxPacketDetails_t * pPacketDetails)

Adjust a RAIL TX timestamp to refer to the end of frame.

Returns

• RAIL_STATUS_NO_ERROR if the packet time was successfully calculated, or an appropriate error code otherwise.

Call the timestamp adjustment function in the same transmit-complete event-handling context as RAIL_GetTxPacketDetailsAlt2() is called.

RAIL_EnableTxHoldOff#

void RAIL_EnableTxHoldOff (RAIL_Handle_t railHandle, bool enable)

Prevent the radio from starting a transmit.

Enable TX hold off to prevent the radio from starting any transmits. Disable TX hold off to allow the radio to transmit again. Attempting to transmit with the TX hold off enabled will result in RAIL_EVENT_TX_BLOCKED and/or RAIL_EVENT_TXACK_BLOCKED events.

Note

• This function does not affect a transmit that has already started. To stop an already-started transmission, use RAIL_Idle() with RAIL_IDLE_ABORT.

RAIL_IsTxHoldOffEnabled#

bool RAIL_IsTxHoldOffEnabled (RAIL_Handle_t railHandle)

Check whether or not TX hold off is enabled.

Returns

• Returns true if TX hold off is enabled, false otherwise.

TX hold off can be enabled/disabled using RAIL_EnableTxHoldOff. Attempting to transmit with the TX hold off enabled will block the transmission and result in RAIL_EVENT_TX_BLOCKED and/or RAIL_EVENT_TXACK_BLOCKED events.

RAIL_SetTxAltPreambleLength#

RAIL_Status_t RAIL_SetTxAltPreambleLength (RAIL_Handle_t railHandle, uint16_t length)

Set an alternate transmitter preamble length.

Returns

• Status code indicating success of the function call.

To cause a transmission to use this alternate preamble length, specify RAIL_TX_OPTION_ALT_PREAMBLE_LEN in the txOptions parameter passed to the respective RAIL transmit API.

Note

• Attempting to set a preamble length of 0xFFFF bits will result in RAIL_STATUS_INVALID_PARAMETER.

RAIL_STOP_MODES_NONE#

#define RAIL_STOP_MODES_NONE

(0U)

Do not stop any radio operations.

RAIL_STOP_MODE_ACTIVE#

#define RAIL_STOP_MODE_ACTIVE

(1U << RAIL_STOP_MODE_ACTIVE_SHIFT)

Stop active radio operations only.

RAIL_STOP_MODE_PENDING#

#define RAIL_STOP_MODE_PENDING

(1U << RAIL_STOP_MODE_PENDING_SHIFT)

Stop pending radio operations.

RAIL_STOP_MODES_ALL#

#define RAIL_STOP_MODES_ALL

(0xFFU)

Stop all radio operations.

RAIL_TX_OPTIONS_NONE#

#define RAIL_TX_OPTIONS_NONE

0UL

A value representing no options enabled.

RAIL_TX_OPTIONS_DEFAULT#

#define RAIL_TX_OPTIONS_DEFAULT

RAIL_TX_OPTIONS_NONE

All options disabled by default.

This is the fastest TX option to apply.

RAIL_TX_OPTION_WAIT_FOR_ACK#

#define RAIL_TX_OPTION_WAIT_FOR_ACK

(1UL << RAIL_TX_OPTION_WAIT_FOR_ACK_SHIFT)

An option to configure whether or not the TXing node will listen for an ACK.

If this is false, the isAck flag in RAIL_RxPacketDetails_t of a received packet will always be false.

RAIL_TX_OPTION_REMOVE_CRC#

#define RAIL_TX_OPTION_REMOVE_CRC

(1UL << RAIL_TX_OPTION_REMOVE_CRC_SHIFT)

An option to remove CRC bytes from TX packets.

To receive packets when the sender has this option set true, set RAIL_RX_OPTION_IGNORE_CRC_ERRORS on the receive side.

RAIL_TX_OPTION_SYNC_WORD_ID#

#define RAIL_TX_OPTION_SYNC_WORD_ID

(1UL << RAIL_TX_OPTION_SYNC_WORD_ID_SHIFT)

An option to select which sync word is used during the transmission.

When two sync words are configured by the PHY or RAIL_ConfigSyncWords() enabling this option selects SYNC2 rather than SYNC1 for the upcoming transmit.

This option should not be used when only one sync word has been configured.

Note

• There are a few special radio configurations (e.g. BLE Viterbi) that do not support transmitting different sync words.

RAIL_TX_OPTION_ANTENNA0#

#define RAIL_TX_OPTION_ANTENNA0

(1UL << RAIL_TX_OPTION_ANTENNA0_SHIFT)

An option to select antenna 0 for transmission.

If the antenna selection option is not set or if both antenna options are set, then the transmit will occur on either antenna depending on the last receive or transmit selection. This option is only valid on platforms that support Antenna Control and have been configured via RAIL_ConfigAntenna().

Note

• These TX antenna options do not control the antenna used for Auto-ACK transmissions, which always occur on the same antenna used to receive the packet being acknowledged.

RAIL_TX_OPTION_ANTENNA1#

#define RAIL_TX_OPTION_ANTENNA1

(1UL << RAIL_TX_OPTION_ANTENNA1_SHIFT)

An option to select antenna 1 for transmission.

If the antenna selection option is not set or if both antenna options are set, then the transmit will occur on either antenna depending on the last receive or transmit selection. This option is only valid on platforms that support Antenna Control and have been configured via RAIL_ConfigAntenna().

Note

• These TX antenna options do not control the antenna used for Auto-ACK transmissions, which always occur on the same antenna used to receive the packet being acknowledged.

RAIL_TX_OPTION_ALT_PREAMBLE_LEN#

#define RAIL_TX_OPTION_ALT_PREAMBLE_LEN

(1UL << RAIL_TX_OPTION_ALT_PREAMBLE_LEN_SHIFT)

An option to use the alternate preamble length established by RAIL_SetTxAltPreambleLength() for the transmission.

When not set, the PHY configuration's preamble length is used.

RAIL_TX_OPTION_CCA_PEAK_RSSI#

#define RAIL_TX_OPTION_CCA_PEAK_RSSI

(1UL << RAIL_TX_OPTION_CCA_PEAK_RSSI_SHIFT)

An option to use peak rather than average RSSI energy detected during CSMA's RAIL_CsmaConfig_t::ccaDuration or LBT's RAIL_LbtConfig_t::lbtDuration to determine whether the channel is clear or busy.

This option is only valid when calling one of the CCA transmit routines: RAIL_StartCcaCsmaTx, RAIL_StartCcaLbtTx, RAIL_StartScheduledCcaCsmaTx, or RAIL_StartScheduledCcaLbtTx.

Note

• This option does nothing on platforms like EFR32XG1 that lack support for capturing peak RSSI energy.

RAIL_TX_OPTION_CCA_ONLY#

#define RAIL_TX_OPTION_CCA_ONLY

(1UL << RAIL_TX_OPTION_CCA_ONLY_SHIFT)

An option to only perform the CCA (CSMA/LBT) operation but not automatically transmit if the channel is clear.

This option is only valid when calling one of the CCA transmit routines: RAIL_StartCcaCsmaTx, RAIL_StartCcaLbtTx, RAIL_StartScheduledCcaCsmaTx, or RAIL_StartScheduledCcaLbtTx.

Application can then use the RAIL_EVENT_TX_CHANNEL_CLEAR to initiate transmit manually, e.g., giving it the opportunity to adjust outgoing packet data before the packet goes out.

Note

• Configured state transitions to Rx or Idle are suspended during this CSMA/LBT operation. If packet reception occurs, the radio will return to the state it was in just prior to the CSMA/LBT operation when that reception (including any AutoACK response) is complete.

RAIL_TX_OPTION_RESEND#

#define RAIL_TX_OPTION_RESEND

(1UL << RAIL_TX_OPTION_RESEND_SHIFT)

An option to resend packet at the beginning of the Transmit FIFO.

The packet to be resent must have been previously provided by RAIL_SetTxFifo() or RAIL_WriteTxFifo() passing true for the latter's reset parameter. It works by setting the transmit FIFO's read offset to the beginning of the FIFO while leaving its write offset intact. For this to work, RAIL_DataConfig_t::txMethod must be RAIL_DataMethod_t::PACKET_MODE (i.e., the packet can't exceed the Transmit FIFO's size), otherwise undefined behavior will result.

This option can also be used with RAIL_SetNextTxRepeat() to cause the repeated packet(s) to all be the same as the first.

RAIL_TX_OPTION_CONCURRENT_PHY_ID#

#define RAIL_TX_OPTION_CONCURRENT_PHY_ID

(1UL << RAIL_TX_OPTION_CONCURRENT_PHY_ID_SHIFT)

An option to specify which PHY is used to transmit in the case of concurrent mode.

Concurrent mode is only allowed on EFR32xG25 for some predefined combinations of Wi-SUN PHYs. When set/unset, the alternate/base PHY is used to transmit.

RAIL_TX_OPTIONS_ALL#

#define RAIL_TX_OPTIONS_ALL

0xFFFFFFFFUL

A value representing all possible options.

RAIL_MAX_LBT_TRIES#

#define RAIL_MAX_LBT_TRIES

(15U)

The maximum number of LBT/CSMA retries supported.

RAIL_MAX_CSMA_EXPONENT#

#define RAIL_MAX_CSMA_EXPONENT

(8U)

The maximum power-of-2 exponent for CSMA backoffs.

RAIL_CSMA_CONFIG_802_15_4_2003_2p4_GHz_OQPSK_CSMA#

#define RAIL_CSMA_CONFIG_802_15_4_2003_2p4_GHz_OQPSK_CSMA

RAIL_CsmaConfig_t initializer configuring CSMA per IEEE 802.15.4-2003 on 2.4 GHz OSPSK, commonly used by ZigBee.

RAIL_CSMA_CONFIG_SINGLE_CCA#

#define RAIL_CSMA_CONFIG_SINGLE_CCA

RAIL_CsmaConfig_t initializer configuring a single CCA prior to TX.

It can be used to as a basis for implementing other channel access schemes with custom backoff delays. Users can override ccaBackoff with a fixed delay on each use.

RAIL_LBT_CONFIG_ETSI_EN_300_220_1_V2_4_1#

#define RAIL_LBT_CONFIG_ETSI_EN_300_220_1_V2_4_1

RAIL_LbtConfig_t initializer configuring LBT per ETSI 300 220-1 V2.4.1 for a typical Sub-GHz band.

To be practical, users should override lbtTries and/or lbtTimeout so channel access failure will be reported in a reasonable time frame rather than the unbounded time frame ETSI defined.

RAIL_LBT_CONFIG_ETSI_EN_300_220_1_V3_1_0#

#define RAIL_LBT_CONFIG_ETSI_EN_300_220_1_V3_1_0

RAIL_LbtConfig_t initializer configuring LBT per ETSI 300 220-1 V3.1.0 for a typical Sub-GHz band.

To be practical, users should override lbtTries and/or lbtTimeout so channel access failure will be reported in a reasonable time frame rather than the unbounded time frame ETSI defined.

RAIL_TX_REPEAT_OPTIONS_NONE#

#define RAIL_TX_REPEAT_OPTIONS_NONE

0U

A value representing no repeat options enabled.

RAIL_TX_REPEAT_OPTIONS_DEFAULT#

#define RAIL_TX_REPEAT_OPTIONS_DEFAULT

RAIL_TX_REPEAT_OPTIONS_NONE

All repeat options disabled by default.

RAIL_TX_REPEAT_OPTION_HOP#

#define RAIL_TX_REPEAT_OPTION_HOP

(1U << RAIL_TX_REPEAT_OPTION_HOP_SHIFT)

An option to configure whether or not to channel-hop before each repeated transmit.

RAIL_TX_REPEAT_OPTION_START_TO_START#

#define RAIL_TX_REPEAT_OPTION_START_TO_START

(1 << RAIL_TX_REPEAT_OPTION_START_TO_START_SHIFT)

An option to configure the delay between transmissions to be from start to start instead of end to start.

Delay must be long enough to cover the prior transmit's time.

RAIL_TX_REPEAT_INFINITE_ITERATIONS#

#define RAIL_TX_REPEAT_INFINITE_ITERATIONS

(0xFFFFU)

RAIL_TxRepeatConfig_t::iterations initializer configuring infinite repeated transmissions.