TWIM HAL

group nrf_twim_hal

Hardware access layer for managing the TWIM peripheral.

Defines

NRF_TWIM_INST_GET(idx)

Macro getting pointer to the structure of registers of the TWIM peripheral.

Parameters:

idx – [in] TWIM instance index.

Returns:

Pointer to the structure of registers of the TWIM peripheral.

NRF_TWIM_HAS_1000_KHZ_FREQ: Symbol indicating whether 1000 kHz clock frequency is available.

NRF_TWIM_HAS_ARRAY_LIST: Symbol indicating whether EasyDMA array list feature is present.

NRF_TWIM_HAS_DMA_REG: Symbol indicating whether dedicated DMA register is present.

NRF_TWIM_HAS_DMA_CURRENTAMOUNT_REG: Symbol indicating whether DMA CURRENTAMOUNT registers are present.

NRF_TWIM_HAS_DMA_TASKS_EVENTS: Symbol indicating whether TWIM DMA tasks and events are present.

NRF_TWIM_HAS_DMA_SHORTS: Symbol indicating whether TWIM DMA shortcuts are present.

NRF_TWIM_HAS_BUS_ERROR_EVENTS: Symbol indicating whether TWIM BUSERROR events are present.

NRF_TWIM_DMA_RX_PATTERN_MAX_COUNT: Max number of RX patterns.

Enums

enum nrf_twim_task_t

TWIM tasks.

Values:

enumerator NRF_TWIM_TASK_STARTRX: Start TWI receive operation using easyDMA to load the values.

enumerator NRF_TWIM_TASK_STOPRX: Stop TWI receive operation using easyDMA. This does not trigger an END event.

enumerator NRF_TWIM_TASK_STARTTX: Start TWI transmit operation using easyDMA to load the values.

enumerator NRF_TWIM_TASK_STOPTX: Stop TWI transmit operation using easyDMA to load the values.

enumerator NRF_TWIM_TASK_ENABLERXMATCH0: Enable TWI pattern matching functionality for pattern 0.

enumerator NRF_TWIM_TASK_ENABLERXMATCH1: Enable TWI pattern matching functionality for pattern 1.

enumerator NRF_TWIM_TASK_ENABLERXMATCH2: Enable TWI pattern matching functionality for pattern 2.

enumerator NRF_TWIM_TASK_ENABLERXMATCH3: Enable TWI pattern matching functionality for pattern 3.

enumerator NRF_TWIM_TASK_DISABLERXMATCH0: Disable TWI pattern matching functionality for pattern 0.

enumerator NRF_TWIM_TASK_DISABLERXMATCH1: Disable TWI pattern matching functionality for pattern 1.

enumerator NRF_TWIM_TASK_DISABLERXMATCH2: Disable TWI pattern matching functionality for pattern 2.

enumerator NRF_TWIM_TASK_DISABLERXMATCH3: Disable TWI pattern matching functionality for pattern 3.

enumerator NRF_TWIM_TASK_STOP: Stop TWI transaction.

enumerator NRF_TWIM_TASK_SUSPEND: Suspend TWI transaction.

enumerator NRF_TWIM_TASK_RESUME: Resume TWI transaction.

enum nrf_twim_event_t

TWIM events.

Values:

enumerator NRF_TWIM_EVENT_STOPPED: TWI stopped.

enumerator NRF_TWIM_EVENT_ERROR: TWI error.

enumerator NRF_TWIM_EVENT_SUSPENDED: TWI suspended.

enumerator NRF_TWIM_EVENT_ENDRX: Receive sequence finished.

enumerator NRF_TWIM_EVENT_RXSTARTED: Receive sequence started.

enumerator NRF_TWIM_EVENT_RXMATCH0: Pattern match for pattern 0 detected.

enumerator NRF_TWIM_EVENT_RXMATCH1: Pattern match for pattern 1 detected.

enumerator NRF_TWIM_EVENT_RXMATCH2: Pattern match for pattern 2 detected.

enumerator NRF_TWIM_EVENT_RXMATCH3: Pattern match for pattern 3 detected.

enumerator NRF_TWIM_EVENT_ENDTX: Transmit sequence finished.

enumerator NRF_TWIM_EVENT_TXSTARTED: Transmit sequence started.

enumerator NRF_TWIM_EVENT_RXBUSERROR: Memory bus error occurred during the RX transfer.

enumerator NRF_TWIM_EVENT_TXBUSERROR: Memory bus error occurred during the TX transfer.

enumerator NRF_TWIM_EVENT_LASTRX: Byte boundary, starting to receive the last byte.

enumerator NRF_TWIM_EVENT_LASTTX: Byte boundary, starting to transmit the last byte.

enum nrf_twim_short_mask_t

TWIM shortcuts.

Values:

enumerator NRF_TWIM_SHORT_LASTTX_SUSPEND_MASK: Shortcut between LASTTX event and SUSPEND task.

enumerator NRF_TWIM_SHORT_LASTTX_STOP_MASK: Shortcut between LASTTX event and STOP task.

enumerator NRF_TWIM_SHORT_LASTRX_STOP_MASK: Shortcut between LASTRX event and STOP task.

enumerator NRF_TWIM_SHORT_LASTTX_STARTRX_MASK: Shortcut between LASTTX event and STARTRX task.

enumerator NRF_TWIM_SHORT_LASTRX_STARTTX_MASK: Shortcut between LASTRX event and STARTTX task.

enumerator NRF_TWIM_SHORT_RXMATCH0_ENABLERXMATCH1_MASK: Shortcut between DMA.RX.MATCH0 event and DMA.RX.ENABLEMATCH1 task.

enumerator NRF_TWIM_SHORT_RXMATCH1_ENABLERXMATCH2_MASK: Shortcut between DMA.RX.MATCH1 event and DMA.RX.ENABLEMATCH2 task.

enumerator NRF_TWIM_SHORT_RXMATCH2_ENABLERXMATCH3_MASK: Shortcut between DMA.RX.MATCH2 event and DMA.RX.ENABLEMATCH0 task.

enumerator NRF_TWIM_SHORT_RXMATCH3_ENABLERXMATCH0_MASK: Shortcut between DMA.RX.MATCH3 event and DMA.RX.ENABLEMATCH1 task.

enumerator NRF_TWIM_SHORT_RXMATCH0_DISABLERXMATCH0_MASK: Shortcut between DMA.RX.MATCH0 event and DMA.RX.DISABLEMATCH0 task.

enumerator NRF_TWIM_SHORT_RXMATCH1_DISABLERXMATCH1_MASK: Shortcut between DMA.RX.MATCH1 event and DMA.RX.DISABLEMATCH1 task.

enumerator NRF_TWIM_SHORT_RXMATCH2_DISABLERXMATCH2_MASK: Shortcut between DMA.RX.MATCH2 event and DMA.RX.DISABLEMATCH2 task.

enumerator NRF_TWIM_SHORT_RXMATCH3_DISABLERXMATCH3_MASK: Shortcut between DMA.RX.MATCH3 event and DMA.RX.DISABLEMATCH3 task.

enumerator NRF_TWIM_ALL_SHORTS_MASK: All TWIM shortcuts.

enum nrf_twim_int_mask_t

TWIM interrupts.

Values:

enumerator NRF_TWIM_INT_STOPPED_MASK: Interrupt on STOPPED event.

enumerator NRF_TWIM_INT_ERROR_MASK: Interrupt on ERROR event.

enumerator NRF_TWIM_INT_SUSPENDED_MASK: Interrupt on SUSPENDED event.

enumerator NRF_TWIM_INT_RXSTARTED_MASK: Interrupt on RXSTARTED event.

enumerator NRF_TWIM_INT_TXSTARTED_MASK: Interrupt on TXSTARTED event.

enumerator NRF_TWIM_INT_ENDRX_MASK: Interrupt on DMA.RX.END event.

enumerator NRF_TWIM_INT_RXREADY_MASK: Interrupt on DMA.RX.READY event.

enumerator NRF_TWIM_INT_RXBUSERROR_MASK: Interrupt on DMA.RX.BUSERROR event.

enumerator NRF_TWIM_INT_RXMATCH0_MASK: Interrupt on DMA.RX.MATCH0 event.

enumerator NRF_TWIM_INT_RXMATCH1_MASK: Interrupt on DMA.RX.MATCH1 event.

enumerator NRF_TWIM_INT_RXMATCH2_MASK: Interrupt on DMA.RX.MATCH2 event.

enumerator NRF_TWIM_INT_RXMATCH3_MASK: Interrupt on DMA.RX.MATCH3 event.

enumerator NRF_TWIM_INT_ENDTX_MASK: Interrupt on DMA.TX.END event.

enumerator NRF_TWIM_INT_TXREADY_MASK: Interrupt on DMA.TX.READY event.

enumerator NRF_TWIM_INT_TXBUSERROR_MASK: Interrupt on DMA.TX.BUSERROR event.

enumerator NRF_TWIM_INT_LASTRX_MASK: Interrupt on LASTRX event.

enumerator NRF_TWIM_INT_LASTTX_MASK: Interrupt on LASTTX event.

enumerator NRF_TWIM_ALL_INTS_MASK: All TWIM interrupts.

enum nrf_twim_frequency_t

TWIM master clock frequency.

Values:

enumerator NRF_TWIM_FREQ_100K: 100 kbps.

enumerator NRF_TWIM_FREQ_250K: 250 kbps.

enumerator NRF_TWIM_FREQ_400K: 400 kbps.

enumerator NRF_TWIM_FREQ_1000K: 1000 kbps.

enum nrf_twim_error_t

TWIM error source.

Values:

enumerator NRF_TWIM_ERROR_ADDRESS_NACK: NACK received after sending the address.

enumerator NRF_TWIM_ERROR_DATA_NACK: NACK received after sending a data byte.

enumerator NRF_TWIM_ERROR_OVERRUN

Overrun error.

A new byte was received before the previous byte was handled by peripheral. (previous data is lost).

Functions

NRF_STATIC_INLINE void nrf_twim_task_trigger(NRF_TWIM_Type *p_reg, nrf_twim_task_t task)

Function for activating the specified TWIM task.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
task – [in] Task to be activated.

NRF_STATIC_INLINE uint32_t nrf_twim_task_address_get(NRF_TWIM_Type const *p_reg, nrf_twim_task_t task)

Function for getting the address of the specified TWIM task register.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
task – [in] The specified task.

Returns:

Address of the specified task register.

NRF_STATIC_INLINE void nrf_twim_event_clear(NRF_TWIM_Type *p_reg, nrf_twim_event_t event)

Function for clearing the specified TWIM event.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
event – [in] Event to clear.

NRF_STATIC_INLINE bool nrf_twim_event_check(NRF_TWIM_Type const *p_reg, nrf_twim_event_t event)

Function for retrieving the state of the TWIM event.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
event – [in] Event to be checked.

Return values:

true – The event has been generated.
false – The event has not been generated.

NRF_STATIC_INLINE uint32_t nrf_twim_event_address_get(NRF_TWIM_Type const *p_reg, nrf_twim_event_t event)

Function for getting the address of the specified TWIM event register.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
event – [in] The specified event.

Returns:

Address of the specified event register.

NRF_STATIC_INLINE void nrf_twim_shorts_enable(NRF_TWIM_Type *p_reg, uint32_t mask)

Function for enabling the specified shortcuts.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
mask – [in] Shortcuts to be enabled.

NRF_STATIC_INLINE void nrf_twim_shorts_disable(NRF_TWIM_Type *p_reg, uint32_t mask)

Function for disabling the specified shortcuts.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
mask – [in] Shortcuts to be disabled.

NRF_STATIC_INLINE void nrf_twim_int_enable(NRF_TWIM_Type *p_reg, uint32_t mask)

Function for enabling the specified interrupts.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
mask – [in] Mask of interrupts to be enabled. Use nrf_twim_int_mask_t values for bit masking.

NRF_STATIC_INLINE void nrf_twim_int_disable(NRF_TWIM_Type *p_reg, uint32_t mask)

Function for disabling the specified interrupts.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
mask – [in] Mask of interrupts to be disabled. Use nrf_twim_int_mask_t values for bit masking.

NRF_STATIC_INLINE uint32_t nrf_twim_int_enable_check(NRF_TWIM_Type const *p_reg, uint32_t mask)

Function for checking if the specified interrupts are enabled.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
mask – [in] Mask of interrupts to be checked. Use nrf_twim_int_mask_t values for bit masking.

Returns:

Mask of enabled interrupts.

NRF_STATIC_INLINE void nrf_twim_subscribe_set(NRF_TWIM_Type *p_reg, nrf_twim_task_t task, uint8_t channel)

Function for setting the subscribe configuration for a given TWIM task.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
task – [in] Task for which to set the configuration.
channel – [in] Channel through which to subscribe events.

NRF_STATIC_INLINE void nrf_twim_subscribe_clear(NRF_TWIM_Type *p_reg, nrf_twim_task_t task)

Function for clearing the subscribe configuration for a given TWIM task.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
task – [in] Task for which to clear the configuration.

NRF_STATIC_INLINE void nrf_twim_publish_set(NRF_TWIM_Type *p_reg, nrf_twim_event_t event, uint8_t channel)

Function for setting the publish configuration for a given TWIM event.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
event – [in] Event for which to set the configuration.
channel – [in] Channel through which to publish the event.

NRF_STATIC_INLINE void nrf_twim_publish_clear(NRF_TWIM_Type *p_reg, nrf_twim_event_t event)

Function for clearing the publish configuration for a given TWIM event.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
event – [in] Event for which to clear the configuration.

NRF_STATIC_INLINE void nrf_twim_enable(NRF_TWIM_Type *p_reg)

Function for enabling the TWIM peripheral.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.

NRF_STATIC_INLINE void nrf_twim_disable(NRF_TWIM_Type *p_reg)

Function for disabling the TWIM peripheral.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.

NRF_STATIC_INLINE void nrf_twim_pins_set(NRF_TWIM_Type *p_reg, uint32_t scl_pin, uint32_t sda_pin)

Function for configuring TWI pins.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
scl_pin – [in] SCL pin number.
sda_pin – [in] SDA pin number.

NRF_STATIC_INLINE uint32_t nrf_twim_scl_pin_get(NRF_TWIM_Type const *p_reg)

Function for retrieving the SCL pin selection.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.

Returns:

SCL pin selection.

NRF_STATIC_INLINE uint32_t nrf_twim_sda_pin_get(NRF_TWIM_Type const *p_reg)

Function for retrieving the SDA pin selection.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.

Returns:

SDA pin selection.

NRF_STATIC_INLINE void nrf_twim_frequency_set(NRF_TWIM_Type *p_reg, nrf_twim_frequency_t frequency)

Function for setting the TWI master clock frequency.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
frequency – [in] TWI frequency.

NRF_STATIC_INLINE uint32_t nrf_twim_errorsrc_get_and_clear(NRF_TWIM_Type *p_reg)

Function for checking the TWI error source.

The error flags are cleared after reading.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.

Returns:

Mask with error source flags.

NRF_STATIC_INLINE void nrf_twim_address_set(NRF_TWIM_Type *p_reg, uint8_t address)

Function for setting the address to be used in TWI transfers.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
address – [in] Address to be used in transfers.

NRF_STATIC_INLINE uint8_t nrf_twim_address_get(NRF_TWIM_Type const *p_reg)

Function for getting the address to be used in TWI transfers.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.

Returns:

Address to be used in TWI transfers.

NRF_STATIC_INLINE void nrf_twim_tx_buffer_set(NRF_TWIM_Type *p_reg, uint8_t const *p_buffer, size_t length)

Function for setting the transmit buffer.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
p_buffer – [in] Pointer to the buffer with data to send.
length – [in] Maximum number of data bytes to transmit.

NRF_STATIC_INLINE void nrf_twim_rx_buffer_set(NRF_TWIM_Type *p_reg, uint8_t *p_buffer, size_t length)

Function for setting the receive buffer.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
p_buffer – [in] Pointer to the buffer for received data.
length – [in] Maximum number of data bytes to receive.

NRF_STATIC_INLINE void nrf_twim_shorts_set(NRF_TWIM_Type *p_reg, uint32_t mask)

Function for setting the specified shortcuts.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
mask – [in] Shortcuts to be set.

NRF_STATIC_INLINE uint32_t nrf_twim_shorts_get(NRF_TWIM_Type const *p_reg)

Function for getting the shortcut setting.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.

Returns:

Current shortcut configuration.

NRF_STATIC_INLINE size_t nrf_twim_txd_amount_get(NRF_TWIM_Type const *p_reg)

Function for getting the amount of transmitted bytes.

Note

In case of NACK error, includes the NACK’ed byte.

Note

Number of bytes are updated after the END event and each MATCH event.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.

Returns:

Amount of transmitted bytes.

NRF_STATIC_INLINE size_t nrf_twim_rxd_amount_get(NRF_TWIM_Type const *p_reg)

Function for getting the amount of received bytes in the last transaction.

Note

In case of NACK error, includes the NACK’ed byte.

Note

Number of bytes are updated after the END event and each MATCH event.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.

Returns:

Amount of received bytes.

NRF_STATIC_INLINE size_t nrf_twim_txd_curr_amount_get(NRF_TWIM_Type const *p_reg)

Function for getting the amount of transmitted bytes in the current transaction.

Note

Number of bytes is continuously updated during transmission.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.

Returns:

Amount of transmitted bytes.

NRF_STATIC_INLINE size_t nrf_twim_rxd_curr_amount_get(NRF_TWIM_Type const *p_reg)

Function for getting the amount of received bytes in the current transaction.

Note

Number of bytes is continuously updated during reception.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.

Returns:

Amount of received bytes.

NRF_STATIC_INLINE void nrf_twim_tx_list_enable(NRF_TWIM_Type *p_reg)

Function for enabling the TX list feature.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.

NRF_STATIC_INLINE void nrf_twim_tx_list_disable(NRF_TWIM_Type *p_reg)

Function for disabling the TX list feature.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.

NRF_STATIC_INLINE void nrf_twim_rx_list_enable(NRF_TWIM_Type *p_reg)

Function for enabling the RX list feature.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.

NRF_STATIC_INLINE void nrf_twim_rx_list_disable(NRF_TWIM_Type *p_reg)

Function for disabling the RX list feature.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.

NRF_STATIC_INLINE void nrf_twim_rx_pattern_match_enable_set(NRF_TWIM_Type *p_reg, uint8_t index, bool enable)

Function for enabling individual pattern match filters.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
index – [in] Index of pattern match filter.
enable – [in] True if pattern match filter is to be enabled, false otherwise.

NRF_STATIC_INLINE bool nrf_twim_rx_pattern_match_enable_check(NRF_TWIM_Type const *p_reg, uint8_t index)

Function for checking if the specified pattern match filter is enabled.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
index – [in] Index of pattern match filter.

Return values:

true – Pattern match filter is enabled.
false – Pattern match filter is disabled.

NRF_STATIC_INLINE void nrf_twim_rx_pattern_match_one_shot_enable(NRF_TWIM_Type *p_reg, uint8_t index)

Function for enabling one-shot operation for the specified match filter.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
index – [in] Index of pattern match filter.

NRF_STATIC_INLINE void nrf_twim_rx_pattern_match_one_shot_disable(NRF_TWIM_Type *p_reg, uint8_t index)

Function for disabling one-shot operation for the specified match filter.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
index – [in] Index of pattern match filter.

NRF_STATIC_INLINE bool nrf_twim_rx_pattern_match_one_shot_check(NRF_TWIM_Type const *p_reg, uint8_t index)

Function for checking if specified pattern match filter is configured as one-shot.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
index – [in] Index of pattern match filter.

Return values:

true – Pattern match filter is configured as one-shot.
false – Pattern match filter is configured as continuous.

NRF_STATIC_INLINE void nrf_twim_rx_pattern_match_candidate_set(NRF_TWIM_Type *p_reg, uint8_t index, uint32_t pattern)

Function for setting the pattern to be looked for by the specified match filter.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
index – [in] Index of pattern match filter.
pattern – [in] Pattern to be looked for. Match will trigger the corresponding event, if enabled.

NRF_STATIC_INLINE uint32_t nrf_twim_rx_pattern_match_candidate_get(NRF_TWIM_Type const *p_reg, uint8_t index)

Function for getting the pattern that the specified match filter is looking for.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
index – [in] Index of pattern match filter.

Returns:

Pattern that the specified match filter is looking for.

NRF_STATIC_INLINE void nrf_twim_rx_terminate_on_bus_error_enable_set(NRF_TWIM_Type *p_reg, bool enable)

Function for enabling RX transaction termination on the detection of a BUSERROR event.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
enable – [in] True if the RX transaction termination is to be enabled, false otherwise.

NRF_STATIC_INLINE bool nrf_twim_rx_terminate_on_bus_error_check(NRF_TWIM_Type const *p_reg)

Function for checking if the RX transaction termination on the detection of a BUSERROR event is enabled.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.

Return values:

true – Transaction termination on BUSERROR event is enabled.
false – Transaction termination on BUSERROR event is disabled.

NRF_STATIC_INLINE void nrf_twim_tx_terminate_on_bus_error_enable_set(NRF_TWIM_Type *p_reg, bool enable)

Function for enabling TX transaction termination on the detection of a BUSERROR event.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.
enable – [in] True if the TX transaction termination is to be enabled, false otherwise.

NRF_STATIC_INLINE bool nrf_twim_tx_terminate_on_bus_error_check(NRF_TWIM_Type const *p_reg)

Function for checking if the TX transaction termination on the detection of a BUSERROR event is enabled.

Parameters:

p_reg – [in] Pointer to the structure of registers of the peripheral.

Return values:

true – Transaction termination on BUSERROR event is enabled.
false – Transaction termination on BUSERROR event is disabled.