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nrfx_uarte: Add API for controlling RXDRDY event 

Extend API with functions for enabling and disabling RXDRDY event.
Added NRFX_UARTE_EVT_RX_BYTE event which is generated on RXDRDY event.

Signed-off-by: Krzysztof Chruściński <krzysztof.chruscinski@nordicsemi.no>
This commit is contained in:
Krzysztof Chruściński 2023-11-15 14:40:35 +01:00
parent b9633ecea6
commit b8e5d50bd0
2 changed files with 47 additions and 0 deletions
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39
nrfx/drivers/include/nrfx_uarte.h
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@ -198,6 +198,7 @@ typedef enum
NRFX_UARTE_EVT_RX_BUF_REQUEST, ///< Request for a RX buffer.
NRFX_UARTE_EVT_RX_DISABLED, ///< Receiver is disabled.
NRFX_UARTE_EVT_RX_BUF_TOO_LATE, ///< RX buffer request handled too late.
NRFX_UARTE_EVT_RX_BYTE, ///< Byte was received.
NRFX_UARTE_EVT_TRIGGER, ///< Result of @ref nrfx_uarte_int_trigger.
} nrfx_uarte_evt_type_t;
@ -660,6 +661,33 @@ uint32_t nrfx_uarte_errorsrc_get(nrfx_uarte_t const * p_instance);
*/
bool nrfx_uarte_rx_new_data_check(nrfx_uarte_t const * p_instance);
/**
* @brief Function for enabling @ref NRFX_UARTE_EVT_RX_BYTE event.
*
* The function enables the @ref NRF_UARTE_EVENT_RXDRDY hardware event which is generated whenever a byte is
* received in RXD registers. The event indicates only that data is received, hence it must not be used yet
* because it may not be present yet in the RAM buffer handled by the EasyDMA. The event can be used only to
* detect a receiver activity. The event can be enabled at any time. Enabling it may increase the number of interrupts (after each received byte).
*
* @note If there were a receiver activity prior to enabling the @ref NRF_UARTE_EVENT_RXDRDY event,
* the @ref NRF_UARTE_EVENT_RXDRDY event may already be set and the @ref NRFX_UARTE_EVT_RX_BYTE will be
* triggered immediately. To avoid that, it is recommended to clear that event by calling
* the @ref nrfx_uarte_rx_new_data_check.
*
* @param[in] p_instance Pointer to the driver instance structure.
*/
NRFX_STATIC_INLINE void nrfx_uarte_rxdrdy_enable(nrfx_uarte_t const * p_instance);
/**
* @brief Function for disabling @ref NRFX_UARTE_EVT_RX_BYTE event.
*
* The function disables the RXDRDY hardware event. See the @ref nrfx_uarte_rxdrdy_enable for more details.
* The event can be disabled at any time.
*
* @param[in] p_instance Pointer to the driver instance structure.
*/
NRFX_STATIC_INLINE void nrfx_uarte_rxdrdy_disable(nrfx_uarte_t const * p_instance);
/**
* @brief Function for triggering UARTE interrupt.
*
@ -685,6 +713,17 @@ NRFX_STATIC_INLINE uint32_t nrfx_uarte_event_address_get(nrfx_uarte_t const * p_
{
return nrfy_uarte_event_address_get(p_instance->p_reg, event);
}
NRFX_STATIC_INLINE void nrfx_uarte_rxdrdy_enable(nrfx_uarte_t const * p_instance)
{
nrfy_uarte_int_enable(p_instance->p_reg, NRF_UARTE_INT_RXDRDY_MASK);
}
NRFX_STATIC_INLINE void nrfx_uarte_rxdrdy_disable(nrfx_uarte_t const * p_instance)
{
nrfy_uarte_int_disable(p_instance->p_reg, NRF_UARTE_INT_RXDRDY_MASK);
}
#endif // NRFX_DECLARE_ONLY
/**

8
nrfx/drivers/src/nrfx_uarte.c
View File

@ -1856,6 +1856,14 @@ static void irq_handler(NRF_UARTE_Type * p_uarte, uarte_control_block_t * p_cb)
NRFY_EVENT_TO_INT_BITMASK(NRF_UARTE_EVENT_ENDRX),
&p_cb->rx.curr);
// Report RXDRDY only if enabled
if (nrfy_uarte_int_enable_check(p_uarte, NRF_UARTE_INT_RXDRDY_MASK) &&
nrfy_uarte_event_check(p_uarte, NRF_UARTE_EVENT_RXDRDY))
{
nrfy_uarte_event_clear(p_uarte, NRF_UARTE_EVENT_RXDRDY);
user_handler(p_cb, NRFX_UARTE_EVT_RX_BYTE);
}
if (endrx)
{
if (endrx_irq_handler(p_uarte, p_cb, rxstarted) == true)