ANT Interface Reference

ANT API functions

ant_channel_open(ucChannel) ant_channel_open_with_offset(ucChannel, CHANNEL_START_OFFSET_NONE)

This function opens and activates a channel. The channel to open must be in an assigned state. When opening a master channel, a supplied offset can be provided in order to suggest a minimum channel start time offset (from when the command is issued) to the ANT stack. Specifying CHANNEL_START_OFFSET_NONE will result in default channel start up behaviour. When opening a slave channel, CHANNEL_START_OFFSET_NONE must be used.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel to open. param[in] usOffset is an unsigned short (2 octet) denoting the offset from which to start the channel. See Channel Start Offset in ant_parameters.h

Return values

  • 0 – Success

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

  • NRF_ANT_ERROR_CHANNEL_IN_WRONG_STATE –

ant_channel_rx_search_timeout_set(ucChannel, ucTimeout) ant_channel_search_timeout_set(ucChannel, ucTimeout)

This function sets the channel search timeout. For a slave channel, the configuration applies to rx search timeout. For a master channel, the configuration applies to timeout for starting a transmitter using group transmitter initiation requirements.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel number to set.

  • ucTimeout – [in] is an unsigned char (1 octet) denoting the timeout value. When applied to an assigned slave channel, ucTimeout is in 2.5 second increments. Default = 10 (25s) at channel assignment When applied to an assigned master channel, ucTimeout is in 250ms increments. Default = 0 (disabled) at channel assignment

Return values

  • 0 – Success

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_stack_init(const uint8_t *aucLicenseKey)

This function checks for a valid license key and initializes the ANT stack (including stack variables). It must be executed prior to any wireless protocol activity. By default, it will be called during kernel initialization by ANT for nRF Connect SDK initialization code.

Warning

This is an internal glue function intended for SYS_INIT, it is not necessary to call it directly. This function is only meaningful on processor cores used for radio communication and may have a dummy implementation on multicore SoC’s.

Parameters

aucLicenseKey – [in] is a pointer to an ANT License Key. This key is managed via the :kconfig:option:CONFIG_ANT_LICENSE_KEY.

Return values

  • 0 – Success

  • -NRF_EPERM – if the stack is not enabled

  • -NRF_EINVAL – if the ANT License Key argument is invalid

ant_err_t ant_stack_funcs_register(ANT_STACK_FUNCS *const pstFuncs)

This is an internal glue function used by the nRF Connect SDK initialization code for ANT. It should not be called directly. This registers platform specific functions to the ANT stack.

Parameters

pstFuncs – [in] is a pointer to a function table

Return values

  • 0 – Success

  • -NRF_EPERM – if the stack is not enabled

ant_err_t ant_stack_config(ANT_ENABLE *const pstChannelEnable)

This function is used to specify the total number of ANT channels, number of encrypted channels (subset of total ANT channels) and transmit burst queue size to be supported by the ANT stack. Upon enabling successfully, the ANT stack defaults to the values defined by Kconfigs ANT_TOTAL_CHANNELS_ALLOCATED, ANT_ENCRYPTED_CHANNELS and ANT_EVENT_QUEUE_SIZE. If more channels are needed and/or more encrypted channels are needed and/or larger tx burst buffer size is needed, then the desired configuration can be specified to the ANT stack using these configuration variables. In this case, a static RAM buffer (of minimum size defined by ANT_ENABLE_GET_REQUIRED_SPACE) is supplied by the initialization code to be used by the ANT stack.

Note

ant_stack_reset will not reset this ANT stack channel allocation configuration. It will be maintained.

Warning

By default, this function is called automatically by the ANT for nRF Connect SDK initialization code. This function is only meaningful on processor cores used for radio communication and may have a dummy implementation on multicore SoC’s.

Parameters

pstChannelEnable – [in] is a pointer to ANT_ENABLE structure. ANT_ENABLE::ucTotalNumberOfChannels is an unsigned char (1 octet) denoting the total number of ANT channels desired (1 to MAX_ANT_CHANNELS, defined in ant_parameters.h). ANT_ENABLE::ucNumberOfEncryptedChannels is an unsigned char (1 octet) denoting the total number of ANT channels (0 to ucTotalNumberOfChannels) that support encryption. ANT_ENABLE::pucMemoryBlockStartLocation is the pointer to an application supplied buffer to be used by the ANT stack. ANT_ENABLE::usMemoryBlockByteSize is an unsigned short (2 octet) denoting the size of the given memory block (pucMemoryBlockStartLocation). The defined ANT_ENABLE_GET_REQUIRED_SPACE macro (see ant_parameters.h) should be used to determine the minimum buffer size requirement.

Return values

  • 0 – Success

  • -NRF_EPERM – if the stack is not enabled

  • -NRF_EINVAL –

ant_err_t ant_stack_enable(void)

This function enables the ANT stack. It is only permitted after the stack is configured with ant_stack_config. It can be used to re-enable the stack after a call to ant_stack_disable.

Warning

By default, this function is called automatically by the ANT for nRF Connect SDK initialization code.

Return values

  • 0 – Success

  • -NRF_EPERM – if not permitted

ant_err_t ant_stack_disable(void)

This function stops all pending ANT activity and disables the ANT stack. This is a blocking operation. If the operation has timed out (after ~2 seconds), then -NRF_ETIMEDOUT is returned and the application may try again. Otherwise, upon success, 0 is returned. This API affects ANT activity only and does not surrender any system resources allocated for the use of ANT.

Return values

  • 0 – Success

  • -NRF_ETIMEDOUT –

  • -NRF_EPERM – if not permitted (ie. the stack is not enabled)

ant_err_t ant_stack_reset(void)

Function for resetting the ANT Stack. This is a blocking operation. If the operation has timed out (after ~2 seconds), then -NRF_ETIMEDOUT is returned and the application must try again. Otherwise, upon successful reset, 0 is returned.

Return values

  • 0 – Success

  • -NRF_ETIMEDOUT –

  • -NRF_EPERM – if the stack is not enabled

ant_err_t ant_event_get(uint8_t *pucChannel, uint8_t *pucEvent, uint8_t *aucANTMesg)

This function returns ANT channel events and data messages.

Parameters

  • pucChannel – [out] is the pointer to an unsigned char (1 octet) where the channel number will be copied.

  • pucEvent – [out] is the pointer to an unsigned char (1 octet) where the event code will be copied. See Channel Events and Command Response Codes in ant_parameters.h.

  • aucANTMesg – [out] is the buffer where event’s message will be copied. The array size must be at least MESG_BUFFER_SIZE to accommodate the entire ANT_MESSAGE structure size. See ANT Message Structure in ant_parameters.h.

Return values

  • 0 – Success

  • -NRF_EINVAL –

  • -NRF_ENOENT –

ant_err_t ant_channel_assign(uint8_t ucChannel, uint8_t ucChannelType, uint8_t ucNetwork, uint8_t ucExtAssign)

This function assigns and initializes a new channel.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel to assign.

  • ucChannelType – [in] is an unsigned char (1 octet) denoting the channel type. See Assign Channel Parameters/Assign Channel Types in ant_parameters.h.

  • ucNetwork – [in] is an unsigned char (1 octet) denoting the network key to associate with the channel.

  • ucExtAssign – [in] is a bit field (1 octet) for an extended assign. See Ext. Assign Channel Parameters in ant_parameters.h.

Return values

  • 0 – Success

  • -NRF_EPERM –

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

  • NRF_ANT_ERROR_INVALID_NETWORK_NUMBER –

  • NRF_ANT_ERROR_CHANNEL_IN_WRONG_STATE –

ant_err_t ant_channel_unassign(uint8_t ucChannel)

This function unassigns a channel. The channel to unassign must be in an assigned state.

Parameters

ucChannel – [in] is an unsigned char (1 octet) denoting the channel to unassign.

Return values

  • 0 – Success

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

  • NRF_ANT_ERROR_CHANNEL_IN_WRONG_STATE –

ant_err_t ant_channel_open_with_offset(uint8_t ucChannel, uint16_t usOffset)
ant_err_t ant_channel_close(uint8_t ucChannel)

This function closes a channel. The channel must be in an open state (SEARCHING or TRACKING).

Parameters

ucChannel – [in] is an unsigned char (1 octet) denoting the channel to close.

Return values

  • 0 – Success

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

  • NRF_ANT_ERROR_CHANNEL_IN_WRONG_STATE –

ant_err_t ant_broadcast_message_tx(uint8_t ucChannel, uint8_t ucSize, uint8_t *aucMesg)

This function is used to set broadcast data for transmission.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel to send the data on.

  • ucSize – [in] is an unsigned char (1 octet) denoting the size of the message, ucSize must be 8.

  • aucMesg – [in] is the buffer where the message is located (array must be 8 octets).

Return values

  • 0 – Success

  • -NRF_EINVAL –

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

  • NRF_ANT_ERROR_MESSAGE_SIZE_EXCEEDS_LIMIT –

  • NRF_ANT_ERROR_INVALID_SCAN_TX_CHANNEL –

  • NRF_ANT_ERROR_CHANNEL_IN_WRONG_STATE –

  • NRF_ANT_ERROR_TRANSFER_IN_PROGRESS –

  • NRF_ANT_ERROR_TRANSFER_IN_ERROR –

ant_err_t ant_acknowledge_message_tx(uint8_t ucChannel, uint8_t ucSize, uint8_t *aucMesg)

This function is used to send an acknowledge message. This message requests an acknowledgement from the slave to validate reception.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel to send the data on.

  • ucSize – [in] is an unsigned char (1 octet) denoting the size of the message, ucSize must be 8.

  • aucMesg – [in] is the buffer where the message is located (array must be 8 octets).

Return values

  • 0 – Success

  • -NRF_EINVAL –

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

  • NRF_ANT_ERROR_MESSAGE_SIZE_EXCEEDS_LIMIT –

  • NRF_ANT_ERROR_INVALID_SCAN_TX_CHANNEL –

  • NRF_ANT_ERROR_CHANNEL_IN_WRONG_STATE –

  • NRF_ANT_ERROR_TRANSFER_IN_PROGRESS –

  • NRF_ANT_ERROR_TRANSFER_IN_ERROR –

ant_err_t ant_burst_handler_request(uint8_t ucChannel, uint16_t usSize, uint8_t *aucData, uint8_t ucBurstSegment)

This function is used to queue data for burst transmission. After every successful call, the input buffer is held in use by the burst handler and must not be changed. When the burst handler releases the input buffer, it will either generate a EVENT_TRANSFER_NEXT_DATA_BLOCK event or clear a specified wait flag assigned to the burst handler. Transfer end events: EVENT_TRANSFER_TX_COMPLETED and EVENT_TRANSFER_TX_FAILED also releases the input buffer. Special care must be made to ensure that the input buffer does not change until it is released by the burst handler to avoid data corruption. Use of burst segment identifiers (BURST_SEGMENT_START, BURST_SEGMENT_CONTINUE, and BURST_SEGMENT_END) is required to indicate the sequence of the data block being sent as a burst transfer.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel to do a burst transmission.

  • usSize – [in] is an unsigned short (2 octets) denoting the size of the message block. Size must be divisible by 8.

  • aucData – [in] is the buffer where the message block is located.

  • ucBurstSegment – [in] is an unsigned char (1 octet) containing a bitfield representing the message block type. See Tx Burst Handler Request Segment Defines in ant_parameters.h.

Return values

  • 0 – Success

  • -NRF_EINVAL –

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

  • NRF_ANT_ERROR_INVALID_SCAN_TX_CHANNEL –

  • NRF_ANT_ERROR_CHANNEL_NOT_OPENED –

  • NRF_ANT_ERROR_TRANSFER_SEQUENCE_NUMBER_ERROR –

  • NRF_ANT_ERROR_TRANSFER_IN_PROGRESS –

  • NRF_ANT_ERROR_TRANSFER_IN_ERROR –

  • NRF_ANT_ERROR_MESSAGE_SIZE_EXCEEDS_LIMIT –

  • NRF_ANT_ERROR_CHANNEL_IN_WRONG_STATE –

  • NRF_ANT_ERROR_TRANSFER_BUSY –

ant_err_t ant_pending_transmit_clear(uint8_t ucChannel, uint8_t *pucSuccess)

This function clears a pending transmit. Primarily intended for shared slave channels (receive channel).

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel to clear pending transmit.

  • pucSuccess – [out] is the pointer to an unsigned char (1 octet) where the result will be stored.

Return values

  • 0 – Success

  • -NRF_EINVAL –

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_network_address_set(uint8_t ucNetwork, const uint8_t *aucNetworkKey)

This function sets the 64bit network address.

Parameters

  • ucNetwork – [in] is an unsigned char (1 octet) denoting the network number to assign the network address to.

  • aucNetworkKey – [in] is the pointer to location of the Network Key (8 octets in length)

Return values

  • 0 – Success

  • -NRF_EINVAL –

  • NRF_ANT_ERROR_INVALID_NETWORK_NUMBER –

ant_err_t ant_channel_radio_freq_set(uint8_t ucChannel, uint8_t ucFreq)

This function sets the radio frequency of an ANT channel.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel number to set to.

  • ucFreq – [in] is an unsigned char (1 octet) denoting the radio frequency offset from 2400MHz (eg. 2466MHz, ucFreq = 66). Frequency bands are capped to the Bluetooth ISM band. Min:2402 Max:2480.

Return values

  • 0 – Success

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_channel_radio_freq_get(uint8_t ucChannel, uint8_t *pucRfreq)

This function returns the radio frequency of an ANT channel.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel number to query.

  • pucRfreq – [out] is the pointer to an unsigned char (1 octet) where the frequency will be stored.

Return values

  • 0 – Success

  • -NRF_EINVAL –

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_channel_radio_tx_power_set(uint8_t ucChannel, uint8_t ucTxPower, uint8_t ucCustomTxPower)

This function sets the radio tx power.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel number to assign the radio tx power.

  • ucTxPower – [in] is an unsigned char (1 octet) denoting the ANT transmit power index. See Radio TX Power Definitions in ant_parameters.h.

  • ucCustomTxPower – [in] is an unsigned char (1 octet) denoting the custom nRF transmit power as defined in nrf52xxx_bitfields.h. Only applicable if ucTxPower is set to custom tx power selection.

Return values

  • 0 – Success

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_prox_search_set(uint8_t ucChannel, uint8_t ucProxThreshold, uint8_t ucCustomProxThreshold)

This function sets the sensitivity threshold for acquisition on a searching channel. One time set.

Note

ERRATA-153 and ERRATA-225 require the RSSI threshold to be compensated based on a temperature measurement.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel number.

  • ucProxThreshold – [in] is an unsigned char (1 octet) denoting the minimum RSSI threshold required for acquisition during a search. See Radio Proximity Search Threshold in ant_parameters.h

  • ucCustomProxThreshold – [in] is an unsigned char (1 octet) denoting the custom minimum RSSI threshold for acquisition during a search. Only applicable if ucProxThreshold is set to custom proximity selection.

Return values

  • 0 – Success

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_channel_radio_crc_mode_set(uint8_t ucChannel, uint8_t ucCRCMode)

Set the CRC mode used by the ANT radio for a specific channel.

CAUTION: Changing this will break compatability with existing ant radio devices. Channels using an alternate CRC mode will only be able to communicate with other channels using the same CRC mode, and should generally be used with frequency/network-key combinations that are not widely used by other ANT devices.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel to change the CRC mode on.

  • ucCRCMode – [in] is an unsigned char (1 octet) denoting the “CRC mode” to use (CRC_MODE_STANDARD_ANT or CRC_MODE_3BYTE)

Return values

  • 0 – Success

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_channel_radio_crc_mode_get(uint8_t ucChannel, uint8_t *ucCRCModeOut)

Get the current CRC mode used by the ANT radio for a specific channel.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel to get the CRC mode for.

  • ucCRCModeOut – [out] is a pointer to unsigned char (1 octet) that will be set to the current “CRC mode” used by the channel.

Return values

  • 0 – Success

  • -NRF_EINVAL –

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_channel_period_set(uint8_t ucChannel, uint16_t usPeriod)

This function sets the channel period.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel number to set the period to.

  • usPeriod – [in] is an unsigned short (2 octets) denoting the period in 32 kHz counts (usPeriod/32768 s).

Return values

  • 0 – Success

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_channel_period_get(uint8_t ucChannel, uint16_t *pusPeriod)

This function returns the current channel period.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel number to query.

  • pusPeriod – [out] is the pointer to an unsigned short (2 octets) where the channel period will be stored.

Return values

  • 0 – Success

  • -NRF_EINVAL –

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_channel_id_set(uint8_t ucChannel, uint16_t usDeviceNumber, uint8_t ucDeviceType, uint8_t ucTransmitType)

This function sets the channel ID.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel number to set.

  • usDeviceNumber – [in] is an unsigned short (2 octets) denoting the device number.

  • ucDeviceType – [in] is an unsigned char (1 octet) denoting the device type.

  • ucTransmitType – [in] is an unsigned char (1 octet) denoting the transmission type.

Return values

  • 0 – Success

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_channel_id_get(uint8_t ucChannel, uint16_t *pusDeviceNumber, uint8_t *pucDeviceType, uint8_t *pucTransmitType)

This function returns the current Channel ID of a channel.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel number to query.

  • pusDeviceNumber – [out] is the pointer to an unsigned short (2 octets) where the device number will be stored.

  • pucDeviceType – [out] is the pointer to an unsigned char (1 octet) where the device type will be stored.

  • pucTransmitType – [out] is the pointer to an unsigned char (1 octet) where the transmit type will be stored.

Return values

  • 0 – Success

  • -NRF_EINVAL –

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_search_waveform_set(uint8_t ucChannel, uint16_t usWaveform)

This function sets the searching waveform value of an ANT Channel.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel number to set.

  • usWaveform – [in] is an unsigned short (2 octets) denoting the channel waveform period (usWaveform/32768 s). Default = 316.

Return values

  • 0 – Success

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_channel_search_timeout_set(uint8_t ucChannel, uint8_t ucTimeout)
ant_err_t ant_search_channel_priority_set(uint8_t ucChannel, uint8_t ucSearchPriority)

This function sets the channel’s search priority.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel number to set.

  • ucSearchPriority – [in] is an unsigned char (1 octet) denoting the search priority value. 0 to 7 (Default = 0).

Return values

  • 0 – Success

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_search_channel_priority_get(uint8_t ucChannel, uint8_t *pucSearchPriority)

Get the configured search channel priority.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet denoting the channel)

  • pucSearchPriority – [out] is a pointer to an unsigned char (1 octet) denoting the configured search channel priority

Return values

  • 0 – Success

  • -NRF_EINVAL –

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_active_search_sharing_cycles_set(uint8_t ucChannel, uint8_t ucCycles)

This function sets the search cycle number of separate searching channels for active search time sharing.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel number to configure.

  • ucCycles – [in] is an unsigned char (1 octet) denoting the number of cycles to set.

Return values

  • 0 – Success

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_active_search_sharing_cycles_get(uint8_t ucChannel, uint8_t *pucCycles)

This function returns the search sharing cycles number of the specified searching channel for active search time sharing.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel number to query.

  • pucCycles – [out] is the pointer to an unsigned char (1 octet) where the cycle value will be stored.

Return values

  • 0 – Success

  • -NRF_EINVAL –

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_channel_low_priority_rx_search_timeout_set(uint8_t ucChannel, uint8_t ucTimeout)

This function sets the low priority search timeout value of a channel.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel number to set.

  • ucTimeout – [in] is an unsigned char (1 octet) denoting the timeout value in 2.5 seconds increments. Default = 2 (5s).

Return values

  • 0 – Success

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_adv_burst_config_set(uint8_t *aucConfig, uint8_t ucSize)

This function sets the advanced burst configuration. Configuration structure is as follows: Required Byte0 = 0-Disable, 1-Enable. See Advanced Burst Configuration Defines in ant_parameters.h. Required Byte1 = RF payload size. See Advanced Burst Configuration Defines in ant_parameters.h. Required Byte2 = Required advanced burst modes. See Advanced Burst Configuration Defines in ant_parameters.h. Required Byte3 = 0, Reserved Required Byte4 = 0, Reserved Required Byte5 = Optional advanced burst modes. See Advanced Burst Configuration Defines in ant_parameters.h. Required Byte6 = 0, Reserved Required Byte7 = 0, Reserved Optional Byte8 = Advanced burst stalling count config LSB. Typical is 3210 (~10s of stalling) where each count represents ~3ms of stalling. Optional Byte9 = Advanced burst stalling count config MSB. Optional Byte10 = Advanced burst retry count cycle extension. Typical is 3 (15 retries) where each count cycles represents 5 retries.

Parameters

  • aucConfig – [in] is a buffer containing the advanced burst configuration to be set (as stated above).

  • ucSize – [in] is an unsigned char (1 octet) denoting the size of the configuration parameter buffer. Minimum config set is 8 octets, maximum is 11 octets.

Return values

  • 0 – Success

  • -NRF_EINVAL –

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_adv_burst_config_get(uint8_t ucRequestType, uint8_t *aucConfig)

This function gets the advance burst configuration and supported capabilities. Returned structure is as follows for configuration: Byte0 = RF payload size. See Advanced Burst Configuration Defines in ant_parameters.h. Byte1 = Required advanced burst modes. See Advanced Burst Configuration Defines in ant_parameters.h. Byte2 = 0, Reserved Byte3 = 0, Reserved Byte4 = Optional advanced burst modes. See Advanced Burst Configuration Defines in ant_parameters.h. Byte5 = 0, Reserved Byte6 = 0, Reserved Byte7 = Advanced burst stalling count config LSB. Each count represents ~3ms of stalling. Byte8 = Advanced burst stalling count config MSB Byte9 = Advanced burst retry count cycle extension. Each count cycle represents 5 retries.

Returned structure is as follows for capabilities: Byte0 = Supported RF payload size. See Advanced Burst Configuration Defines in ant_parameters.h. Byte1 = Supported burst configurations. See Advanced Burst Configuration Defines in ant_parameters.h. Byte2 = 0, Reserved Byte3 = 0, Reserved

Parameters

  • ucRequestType – [in] is an unsigned char (1 octet) denoting the type of request. 1 = configuration, 0 = capability.

  • aucConfig – [out] is the pointer to the buffer where the configuration/capabilities will be read to. The array should be at least 10 octets

Return values

  • 0 – Success

  • -NRF_EINVAL –

ant_err_t ant_lib_config_set(uint8_t ucANTLibConfig)

This function sets the ANT Messaging Library Configuration used by Extended messaging.

Note

ERRATA-153 and ERRATA-225 require the RSSI reading to be compensated based on a temperature measurement.

Parameters

ucANTLibConfig – [in] is an unsigned char (1 octet) denoting the ANT lib config bit flags. See ANT Library Config in ant_parameters.h.

Return values

  • 0 – Success

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_lib_config_clear(uint8_t ucANTLibConfig)

This function clears the ANT Messaging Library Configuration.

Parameters

ucANTLibConfig – [in] is an unsigned char (1 octet) denoting the ANT lib Config bit(s) to clear. See ANT Library Config in ant_parameters.h.

Return values

0 – Success

ant_err_t ant_lib_config_get(uint8_t *pucANTLibConfig)

This function returns current ANT Messaging Library Configuration.

Parameters

pucANTLibConfig – [out] is the pointer to an unsigned char (1 octet) where the bit flags will be stored. See ANT Library Config in ant_parameters.h.

Return values

  • 0 – Success

  • -NRF_EINVAL –

ant_err_t ant_id_list_add(uint8_t ucChannel, uint8_t *aucDevId, uint8_t ucListIndex)

This function is used to add a Device ID to an include or exclude list.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel number to add the list entry to.

  • aucDevId – [in] is the pointer to the buffer (4 octets) containing device ID information with the following format: Byte0 = DeviceNumber_LSB Byte1 = DeviceNumber_MSB Byte2 = DeviceType Byte3 = TransType

  • ucListIndex – [in] is an unsigned char (1 octet) denoting the index where the specified Channel ID is to be placed in the list (0-3).

Return values

  • 0 – Success

  • -NRF_EINVAL –

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

  • NRF_ANT_ERROR_INVALID_LIST_ID –

ant_err_t ant_id_list_config(uint8_t ucChannel, uint8_t ucIDListSize, uint8_t ucIncExcFlag)

This function is used to configure the device ID list as include or exclude as well as the number of IDs to compare against.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel number of the device ID list.

  • ucIDListSize – [in] is an unsigned char (1 octet) denoting the size of the inclusion or exclusion list (0-4).

  • ucIncExcFlag – [in] is an unsigned char (1 octet) denoting the type of list as Include(0) or Exclude(1)

Return values

  • 0 – Success

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

  • NRF_ANT_ERROR_INVALID_LIST_ID –

ant_err_t ant_auto_freq_hop_table_set(uint8_t ucChannel, uint8_t ucFreq0, uint8_t ucFreq1, uint8_t ucFreq2)

This function populates the frequency hop table list. This table is used when frequency hopping is enabled on a channel via extended assignment bit.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel number to set the frequency hop table list.

  • ucFreq0 – [in] is an unsigned char (1 octet) denoting the offset from 2400MHz of the 1st frequency hop value.

  • ucFreq1 – [in] is an unsigned char (1 octet) denoting the offset from 2400MHz of the 2nd frequency hop value.

  • ucFreq2 – [in] is an unsigned char (1 octet) denoting the offset from 2400MHz of the 3rd frequency hop value.

Return values

  • 0 – Success

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_event_filtering_set(uint16_t usFilter)

This function is used to specify filter configuration for channel event message generation.

Parameters

usFilter – [in] is an unsigned short (2 octets) denoting the filter configuration bitfield. See Event Filtering in ant_parameters.h.

Return values

0 – Success

ant_err_t ant_event_filtering_get(uint16_t *pusFilter)

This function is used to retrieve the filter configuration for channel event message generation.

Parameters

pusFilter – [out] is the pointer to an unsigned short (2 octets) where the filter configuration will be stored. See Event Filtering in ant_parameters.h.

Return values

  • 0 – Success

  • -NRF_EINVAL –

ant_err_t ant_sdu_mask_set(uint8_t ucMask, uint8_t *aucMask)

This function is used to assign a selective data update (SDU) mask (8 octets) to an identifier, ucMask.

Parameters

  • ucMask – [in] is an unsigned char (1 octet) denoting the index representing the SDU data mask.

  • aucMask – [in] is a buffer (8 octets) containing the SDU mask to be assigned to ucMask.

Return values

  • 0 – Success

  • -NRF_EINVAL –

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_sdu_mask_get(uint8_t ucMask, uint8_t *aucMask)

This function returns the selective data update (SDU) mask (8 octets) from the specified identifier, ucMask.

Parameters

  • ucMask – [in] is an unsigned char (1 octet) denoting the index representing the SDU data mask.

  • aucMask – [out] is a pointer to the buffer where the SDU data mask will be copied, the array should be at least 8 octects.

Return values

  • 0 – Success

  • -NRF_EINVAL –

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_sdu_mask_config(uint8_t ucChannel, uint8_t ucMaskConfig)

This function assigns a SDU mask configuration to a particular channel. The configuration specifies the mask identifier and the type of rx data in which the mask should be applied to.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel in which the SDU mask configuration is to be applied to.

  • ucMaskConfig – [in] is an unsigned char (1 octet) denoting SDU mask configuration. See Selective Data Update Mask Configuration Defines in ant_parameters.h.

Return values

  • 0 – Success

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_crypto_channel_enable(uint8_t ucChannel, uint8_t ucEnable, uint8_t ucKeyNum, uint8_t ucDecimationRate)

This function enables/disables 128-bit AES encryption mode to the specified channel. Advanced burst must be enabled beforehand to enable encrypted channel.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel in which encryption mode is set.

  • ucEnable – [in] is an unsigned char (1 octet) denoting the encryption mode. See Encrypted Channel Defines in ant_parameters.h.

  • ucKeyNum – [in] is an unsigned char (1 octet) denoting the key index of the 128-bit key to be used for encryption. The key index range is bound by the number of encrypted channels configured by ant_stack_config(). If ant_stack_config() is not used then by default ucKeyNum is 0. Range is [0 to (num encrypted channels - 1)], if 1 or more encrypted channels are configured.

  • ucDecimationRate – [in] is an unsigned char (1 octet) denoting the decimate rate to apply for encrypted slave channel. Must be > 0.

Return values

  • 0 – Success

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

  • NRF_ANT_ERROR_INVALID_SCAN_TX_CHANNEL –

  • NRF_ANT_ERROR_CHANNEL_NOT_OPENED –

  • NRF_ANT_ERROR_TRANSFER_SEQUENCE_NUMBER_ERROR –

  • NRF_ANT_ERROR_TRANSFER_IN_PROGRESS –

  • NRF_ANT_ERROR_TRANSFER_IN_ERROR –

  • NRF_ANT_ERROR_MESSAGE_SIZE_EXCEEDS_LIMIT –

  • NRF_ANT_ERROR_CHANNEL_IN_WRONG_STATE –

  • NRF_ANT_ERROR_TRANSFER_BUSY –

ant_err_t ant_crypto_key_set(uint8_t ucKeyNum, uint8_t *aucKey)

This function assigns a 128-bit AES encryption key to a key index.

Parameters

  • ucKeyNum – [in] is an unsigned char (1 octet) denoting the key index for assignment. The key index range is bound by the number of encrypted channels configured by ant_stack_config(). If ant_stack_config() is not used then by default ucKeyNum is 0. Range is [0 to (num encrypted channels - 1)], if 1 or more encrypted channels are configured.

  • aucKey – [in] is a buffer (16 octets) containing the 128-bit AES key to be assigned to the key index.

Return values

  • 0 – Success

  • -NRF_EINVAL –

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_crypto_info_set(uint8_t ucType, uint8_t *aucInfo)

This function sets specific information to be exchanged between the channel master and slave during encryption channel set-up/negotiation.

Parameters

  • ucType – [in] is an unsigned char (1 octet) denoting the type of information being set. See Encrypted Channel Defines in ant_parameters.h.

  • aucInfo – [in] is a buffer containing the information being set (4 octets for ID, 19 octets for custom user data).

Return values

  • 0 – Success

  • -NRF_EINVAL –

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_crypto_info_get(uint8_t ucType, uint8_t *aucInfo)

This function retrieves specific information to be exchanged between the channel master and slave during encryption channel set-up/negotiation.

Parameters

  • ucType – [in] is an unsigned char (1 octet) denoting the type of information being requested. See Encrypted Channel Defines in ant_parameters.h.

  • aucInfo – [out] is a pointer to a buffer in which the information retrieved will be copied to (1 octet for supported mode, 4 octets for ID, 19 octets for custom user data).

Return values

  • 0 – Success

  • -NRF_EINVAL –

ant_err_t ant_coex_config_set(uint8_t ucChannel, ANT_BUFFER_PTR *pstCoexConfig, ANT_BUFFER_PTR *pstAdvCoexConfig)

This function sets ANT radio coexistence behaviour. Supported only if ANT is sharing radio HW concurrently with another wireless protocol. ANT Priority <-> Priority Mapping Low <-> Third Priority Normal (default) <-> Third Priority High <-> Second Priority Critical <-> Second Priority.

Fixed interval configuration - fixed pattern scheme, raise priority to high on 1/x intervals, 0 is invalid Keep alive configuration (time) - reactive scheme, raises priority to critical if channel blocked for x 32 kHz counts + next channel interval (e.g. 0x5000 will raise priority if 3 consecutive messages are blocked on a 4 Hz channel)

Configuration structure is as follows: Byte0 = Configuration enable bitfield bit0 - enable/disable tx/rx channel keep alive config (Byte4/5 & Byte6/7) bit1 - enable/disable tx/rx channel fixed interval priority config (Byte1) bit2 - enable/disable transfer keep alive config (Byte2) bit3 - enable/disable search channel fixed interval priority config (Byte3) else - reserved Byte1 = tx/rx channel fixed interval priority configuration (fixed interval behaviour) Byte2 = transfer keep alive configuration (raise priority to high after x blocked transfer events) Byte3 = search channel fixed interval priority configuration (fixed interval behaviour) Byte4(LSB)/Byte5(MSB) = tx channel keep alive configuration (Keep alive configuration (time)) Byte6(LSB)/Byte7(MSB) = rx channel keep alive configuration (Keep alive configuration (time)) Byte8 = ANT counts/16 spent in high priority mode during search scan. Byte9 = ANT counts/16 spent in low priority mode during search scan.

Advanced configuration structure is as follows: Byte0 = Configuration enable bitfield bit0 - enable/disable priority override config (Byte1) bit1-7 - reserved Byte1 = ANT priority override. 0 = low, 1 = normal(default), 2 = high, 3 = critical Byte2 = Reserved Byte3 = Reserved Byte4 = Reserved Byte5 = Reserved Byte6 = Reserved Byte7 = Reserved

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel for which the coexistence configuration is to be set.

  • pstCoexConfig – [in] is a buffer containing the coex configuration to be set. Set as null for no change.

  • pstAdvCoexConfig – [in] is a buffer containing the advanced coex configuration to be set. Set as null for no change.

Return values

  • 0 – Success

  • -NRF_EINVAL –

ant_err_t ant_coex_config_get(uint8_t ucChannel, ANT_BUFFER_PTR *pstCoexConfig, ANT_BUFFER_PTR *pstAdvCoexConfig)

This function retrieves the configured ANT radio coexistence behaviour as described in ant_coex_config_set.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel to query.

  • pstCoexConfig – [out] is the pointer to a buffer where the coexistence configuration will be stored. Set as null to ignore.

  • pstAdvCoexConfig – [out] is the pointer to a buffer where the advanced coexistence configuration will be stored. Set as null to ignore.

Return values

  • 0 – Success

  • -NRF_EINVAL –

ant_err_t ant_enhanced_channel_spacing_enable(uint8_t ucEnable)

This function enables or disables the enhanced channel spacing feature. This feature is enabled by default and is used to reduce internal channel collisions when running multiple tracking channels with channel periods that are synchronous with each other.

Parameters

ucEnable – [in] is a unsigned char (1 octet) denoting enable/disable control. See Enhanced Channel Spacing Defines in ant_parameters.h

Return values

  • 0 – Success

  • -NRF_EINVAL –

ant_err_t ant_channel_status_get(uint8_t ucChannel, uint8_t *pucStatus)

This function gets a specific channel’s status.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel number to query.

  • pucStatus – [out] is the pointer to an unsigned char (1 octet) where the channel status will be stored. See Channel Status in ant_parameters.h.

Return values

  • 0 – Success

  • -NRF_EINVAL –

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_pending_transmit(uint8_t ucChannel, uint8_t *pucPending)

This function determines if there is a pending transmission on a specific channel.

Parameters

  • ucChannel – [in] is an unsigned char (1 octet) denoting the channel number to query.

  • pucPending – [out] is the pointer to an unsigned char (1 octet) where the pending result will be stored. 1 = pending, 0 = otherwise.

Return values

  • 0 – Success

  • -NRF_EINVAL –

  • NRF_ANT_ERROR_INVALID_PARAMETER_PROVIDED –

ant_err_t ant_version_get(uint8_t *aucVersion)

This function gets the version string of the ANT stack.

Parameters

aucVersion – [out] is the pointer to the buffer where the version string will be copied, the array should be at least MESG_VERSION_STRING (see ant_parameters.h) number of octets.

Return values

  • 0 – Success

  • -NRF_EINVAL –

ant_err_t ant_capabilities_get(uint8_t *aucCapabilities)

This function gets the capabilities of the stack.

Parameters

aucCapabilities – [out] is the pointer to the buffer where the capabilities message will be copied, the array should be at least 9 octets. Byte0 = Maximum supported ANT channels Byte1 = Maximum supported ANT networks Byte2 = CAPABILITIES_STANDARD. See Standard capabilities defines in ant_parameters.h Byte3 = CAPABILITIES_ADVANCED. See Advanced capabilities defines in ant_parameters.h Byte4 = CAPABILITIES_ADVANCED_2. See Advanced capabilities 2 defines in ant_parameters.h Byte5 = Maximum support ANT data channels (only applicable for SensRcore support) Byte6 = CAPABILITIES_ADVANCED_3. See Advanced capabilities 3 defines in ant_parameters.h Byte7 = CAPABILITIES_ADVANCED_4. Advanced capabilities 4 defines in ant_parameters.h Byte8 = CAPABILITIES_ADVANCED_5. Advanced capabilities 5 defines in ant_parameters.h

Return values

  • 0 – Success

  • -NRF_EINVAL –

ant_err_t ant_cw_test_mode_init(void)

This function initialize the stack to get ready for a continuous wave transmission test.

Return values

0 – Success

ant_err_t ant_cw_test_mode(uint8_t ucRadioFreq, uint8_t ucTxPower, uint8_t ucCustomTxPower, uint8_t ucMode)

This function starts a continuous wave test mode transmission.

Parameters

  • ucRadioFreq – [in] is an unsigned char (1 octet) denoting the radio frequency offset from 2400MHz for continuous wave mode. (eg. 2466MHz, ucRadioFreq = 66).

  • ucTxPower – [in] is an unsigned char (1 octet) denoting the ANT transmit power index for continuous wave mode. See Radio TX Power Definitions in ant_parameters.h

  • ucCustomTxPower – [in] is an unsigned char (1 octet) denoting the custom nRF transmit power as defined in nrf52xxx_bitfields.h. Only applicable if ucTxPower is set to custom tx power selection.

  • ucMode – [in] is an unsigned char (1 octet) denoting test mode type where 0 = cw tx carrier transmission, 1 = cw tx modulated transmission

Return values

0 – Success

Typedefs

typedef void (*ant_stack_crypto_rand_get)(uint8_t *pucBuf, uint8_t ucLength)
typedef void (*ant_stack_crypto_ecb_encrypt)(ANT_ECB_DATA *data)
struct ANT_ECB_DATA
#include <>

Public Members

uint8_t aucKey[16]
uint8_t aucClearText[16]
uint8_t aucCipherText[16]
struct ANT_STACK_FUNCS
#include <>

Table of specific functions supplied to ANT stack.

Public Members

ant_stack_crypto_rand_get fpRANDGet

Function pointer providing random number for cryptographic purposes

ant_stack_crypto_ecb_encrypt fpECBEncrypt

Function pointer providing ECB encrypt process via HW ECB block

struct ANT_ENABLE
#include <>

Structure for setting up ANT stack channels.

Public Members

uint8_t ucTotalNumberOfChannels

Total number of channels wanted in ANT stack.

uint8_t ucNumberOfEncryptedChannels

Number of encrypted channels wanted (subset of total channels).

uint16_t usNumberOfEvents

Number of events in the event queue.

uint8_t *pucMemoryBlockStartLocation

Memory location pointer to start allocating ANT channels.

uint16_t usMemoryBlockByteSize

Block byte size available for ANT channels starting at memory location pointerNumber of events in the event queue.

struct ANT_BUFFER_PTR
#include <>

Buffer pointer structure. Used for passing dynamically sized buffers to the coex apis.

Public Members

uint8_t ucBufferSize

The length of the buffer in bytes.

uint8_t *pucBuffer

Pointer to the first byte of the buffer.