You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
351 lines
14 KiB
351 lines
14 KiB
/*
|
|
* Copyright (c) 2015 - 2019, Nordic Semiconductor ASA
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 3. Neither the name of the copyright holder nor the names of its
|
|
* contributors may be used to endorse or promote products derived from this
|
|
* software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef NRFX_UART_H__
|
|
#define NRFX_UART_H__
|
|
|
|
#include <nrfx.h>
|
|
#include <hal/nrf_uart.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/**
|
|
* @defgroup nrfx_uart UART driver
|
|
* @{
|
|
* @ingroup nrf_uart
|
|
* @brief UART peripheral driver.
|
|
*/
|
|
|
|
/** @brief Data structure of the UART driver instance. */
|
|
typedef struct
|
|
{
|
|
NRF_UART_Type * p_reg; ///< Pointer to a structure with UART registers.
|
|
uint8_t drv_inst_idx; ///< Index of the driver instance. For internal use only.
|
|
} nrfx_uart_t;
|
|
|
|
#ifndef __NRFX_DOXYGEN__
|
|
enum {
|
|
#if NRFX_CHECK(NRFX_UART0_ENABLED)
|
|
NRFX_UART0_INST_IDX,
|
|
#endif
|
|
NRFX_UART_ENABLED_COUNT
|
|
};
|
|
#endif
|
|
|
|
/** @brief Macro for creating a UART driver instance. */
|
|
#define NRFX_UART_INSTANCE(id) \
|
|
{ \
|
|
.p_reg = NRFX_CONCAT_2(NRF_UART, id), \
|
|
.drv_inst_idx = NRFX_CONCAT_3(NRFX_UART, id, _INST_IDX), \
|
|
}
|
|
|
|
/** @brief Types of UART driver events. */
|
|
typedef enum
|
|
{
|
|
NRFX_UART_EVT_TX_DONE, ///< Requested TX transfer completed.
|
|
NRFX_UART_EVT_RX_DONE, ///< Requested RX transfer completed.
|
|
NRFX_UART_EVT_ERROR, ///< Error reported by UART peripheral.
|
|
} nrfx_uart_evt_type_t;
|
|
|
|
/** @brief Structure for the UART configuration. */
|
|
typedef struct
|
|
{
|
|
uint32_t pseltxd; ///< TXD pin number.
|
|
uint32_t pselrxd; ///< RXD pin number.
|
|
uint32_t pselcts; ///< CTS pin number.
|
|
uint32_t pselrts; ///< RTS pin number.
|
|
void * p_context; ///< Context passed to interrupt handler.
|
|
nrf_uart_hwfc_t hwfc; ///< Flow control configuration.
|
|
nrf_uart_parity_t parity; ///< Parity configuration.
|
|
nrf_uart_baudrate_t baudrate; ///< Baud rate.
|
|
uint8_t interrupt_priority; ///< Interrupt priority.
|
|
} nrfx_uart_config_t;
|
|
|
|
/** @brief UART default configuration. */
|
|
#define NRFX_UART_DEFAULT_CONFIG \
|
|
{ \
|
|
.pseltxd = NRF_UART_PSEL_DISCONNECTED, \
|
|
.pselrxd = NRF_UART_PSEL_DISCONNECTED, \
|
|
.pselcts = NRF_UART_PSEL_DISCONNECTED, \
|
|
.pselrts = NRF_UART_PSEL_DISCONNECTED, \
|
|
.p_context = NULL, \
|
|
.hwfc = (nrf_uart_hwfc_t)NRFX_UART_DEFAULT_CONFIG_HWFC, \
|
|
.parity = (nrf_uart_parity_t)NRFX_UART_DEFAULT_CONFIG_PARITY, \
|
|
.baudrate = (nrf_uart_baudrate_t)NRFX_UART_DEFAULT_CONFIG_BAUDRATE, \
|
|
.interrupt_priority = NRFX_UART_DEFAULT_CONFIG_IRQ_PRIORITY, \
|
|
}
|
|
|
|
/** @brief Structure for the UART transfer completion event. */
|
|
typedef struct
|
|
{
|
|
uint8_t * p_data; ///< Pointer to memory used for transfer.
|
|
uint32_t bytes; ///< Number of bytes transfered.
|
|
} nrfx_uart_xfer_evt_t;
|
|
|
|
/** @brief Structure for the UART error event. */
|
|
typedef struct
|
|
{
|
|
nrfx_uart_xfer_evt_t rxtx; ///< Transfer details, including number of bytes transferred.
|
|
uint32_t error_mask; ///< Mask of error flags that generated the event.
|
|
} nrfx_uart_error_evt_t;
|
|
|
|
/** @brief Structure for the UART event. */
|
|
typedef struct
|
|
{
|
|
nrfx_uart_evt_type_t type; ///< Event type.
|
|
union
|
|
{
|
|
nrfx_uart_xfer_evt_t rxtx; ///< Data provided for transfer completion events.
|
|
nrfx_uart_error_evt_t error; ///< Data provided for error event.
|
|
} data; ///< Union to store event data.
|
|
} nrfx_uart_event_t;
|
|
|
|
/**
|
|
* @brief UART interrupt event handler.
|
|
*
|
|
* @param[in] p_event Pointer to event structure. Event is allocated on the stack so it is available
|
|
* only within the context of the event handler.
|
|
* @param[in] p_context Context passed to the interrupt handler, set on initialization.
|
|
*/
|
|
typedef void (*nrfx_uart_event_handler_t)(nrfx_uart_event_t const * p_event,
|
|
void * p_context);
|
|
|
|
/**
|
|
* @brief Function for initializing the UART driver.
|
|
*
|
|
* This function configures and enables UART. After this function GPIO pins are controlled by UART.
|
|
*
|
|
* @param[in] p_instance Pointer to the driver instance structure.
|
|
* @param[in] p_config Pointer to the structure with the initial configuration.
|
|
* @param[in] event_handler Event handler provided by the user. If not provided, the driver works in
|
|
* blocking mode.
|
|
*
|
|
* @retval NRFX_SUCCESS Initialization is successful.
|
|
* @retval NRFX_ERROR_INVALID_STATE The driver is already initialized.
|
|
* @retval NRFX_ERROR_BUSY Some other peripheral with the same
|
|
* instance ID is already in use. This is
|
|
* possible only if @ref nrfx_prs module
|
|
* is enabled.
|
|
*/
|
|
nrfx_err_t nrfx_uart_init(nrfx_uart_t const * p_instance,
|
|
nrfx_uart_config_t const * p_config,
|
|
nrfx_uart_event_handler_t event_handler);
|
|
|
|
/**
|
|
* @brief Function for uninitializing the UART driver.
|
|
*
|
|
* @param[in] p_instance Pointer to the driver instance structure.
|
|
*/
|
|
void nrfx_uart_uninit(nrfx_uart_t const * p_instance);
|
|
|
|
/**
|
|
* @brief Function for getting the address of the specified UART task.
|
|
*
|
|
* @param[in] p_instance Pointer to the driver instance structure.
|
|
* @param[in] task Task.
|
|
*
|
|
* @return Task address.
|
|
*/
|
|
__STATIC_INLINE uint32_t nrfx_uart_task_address_get(nrfx_uart_t const * p_instance,
|
|
nrf_uart_task_t task);
|
|
|
|
/**
|
|
* @brief Function for getting the address of the specified UART event.
|
|
*
|
|
* @param[in] p_instance Pointer to the driver instance structure.
|
|
* @param[in] event Event.
|
|
*
|
|
* @return Event address.
|
|
*/
|
|
__STATIC_INLINE uint32_t nrfx_uart_event_address_get(nrfx_uart_t const * p_instance,
|
|
nrf_uart_event_t event);
|
|
|
|
/**
|
|
* @brief Function for sending data over UART.
|
|
*
|
|
* If an event handler was provided in nrfx_uart_init() call, this function
|
|
* returns immediately and the handler is called when the transfer is done.
|
|
* Otherwise, the transfer is performed in blocking mode, that is this function
|
|
* returns when the transfer is finished. Blocking mode is not using interrupt
|
|
* so there is no context switching inside the function.
|
|
*
|
|
* @param[in] p_instance Pointer to the driver instance structure.
|
|
* @param[in] p_data Pointer to data.
|
|
* @param[in] length Number of bytes to send.
|
|
*
|
|
* @retval NRFX_SUCCESS Initialization was successful.
|
|
* @retval NRFX_ERROR_BUSY Driver is already transferring.
|
|
* @retval NRFX_ERROR_FORBIDDEN The transfer was aborted from a different context
|
|
* (blocking mode only).
|
|
*/
|
|
nrfx_err_t nrfx_uart_tx(nrfx_uart_t const * p_instance,
|
|
uint8_t const * p_data,
|
|
size_t length);
|
|
|
|
/**
|
|
* @brief Function for checking if UART is currently transmitting.
|
|
*
|
|
* @param[in] p_instance Pointer to the driver instance structure.
|
|
*
|
|
* @retval true The UART is transmitting.
|
|
* @retval false The UART is not transmitting.
|
|
*/
|
|
bool nrfx_uart_tx_in_progress(nrfx_uart_t const * p_instance);
|
|
|
|
/**
|
|
* @brief Function for aborting any ongoing transmission.
|
|
* @note @ref NRFX_UART_EVT_TX_DONE event will be generated in non-blocking mode.
|
|
* It will contain number of bytes sent until the abort was called. The event
|
|
* handler will be called from the function context.
|
|
*
|
|
* @param[in] p_instance Pointer to the driver instance structure.
|
|
*/
|
|
void nrfx_uart_tx_abort(nrfx_uart_t const * p_instance);
|
|
|
|
/**
|
|
* @brief Function for receiving data over UART.
|
|
*
|
|
* If an event handler is provided in the nrfx_uart_init() call, this function
|
|
* returns immediately and the handler is called when the transfer is done.
|
|
* Otherwise, the transfer is performed in blocking mode, that is this function
|
|
* returns when the transfer is finished. Blocking mode is not using interrupt so
|
|
* there is no context switching inside the function.
|
|
* The receive buffer pointer is double-buffered in non-blocking mode. The secondary
|
|
* buffer can be set immediately after starting the transfer and will be filled
|
|
* when the primary buffer is full. The double-buffering feature allows
|
|
* receiving data continuously.
|
|
*
|
|
* If this function is used without a previous call to @ref nrfx_uart_rx_enable, the reception
|
|
* will be stopped on error or when the supplied buffer fills up. In both cases,
|
|
* RX FIFO gets disabled. This means that, in case of error, the bytes that follow are lost.
|
|
* If this nrfx_uart_rx() function is used with the previous call to @ref nrfx_uart_rx_enable,
|
|
* the reception is stopped in case of error, but FIFO is still ongoing. The receiver is still
|
|
* working, so after handling the error, an immediate repeated call to this nrfx_uart_rx()
|
|
* function with fresh data buffer will re-establish reception. To disable the receiver,
|
|
* you must call @ref nrfx_uart_rx_disable explicitly.
|
|
*
|
|
* @param[in] p_instance Pointer to the driver instance structure.
|
|
* @param[in] p_data Pointer to data.
|
|
* @param[in] length Number of bytes to receive.
|
|
*
|
|
* @retval NRFX_SUCCESS Reception is complete (in case of blocking mode) or it is
|
|
* successfully started (in case of non-blocking mode).
|
|
* @retval NRFX_ERROR_BUSY The driver is already receiving
|
|
* (and the secondary buffer has already been set
|
|
* in non-blocking mode).
|
|
* @retval NRFX_ERROR_FORBIDDEN The transfer was aborted from a different context
|
|
* (blocking mode only, also see @ref nrfx_uart_rx_disable).
|
|
* @retval NRFX_ERROR_INTERNAL The UART peripheral reported an error.
|
|
*/
|
|
nrfx_err_t nrfx_uart_rx(nrfx_uart_t const * p_instance,
|
|
uint8_t * p_data,
|
|
size_t length);
|
|
|
|
/**
|
|
* @brief Function for testing the receiver state in blocking mode.
|
|
*
|
|
* @param[in] p_instance Pointer to the driver instance structure.
|
|
*
|
|
* @retval true The receiver has at least one byte of data to get.
|
|
* @retval false The receiver is empty.
|
|
*/
|
|
bool nrfx_uart_rx_ready(nrfx_uart_t const * p_instance);
|
|
|
|
/**
|
|
* @brief Function for enabling the receiver.
|
|
*
|
|
* UART has a 6-byte-long RX FIFO and it is used to store incoming data. If a user does not call the
|
|
* UART receive function before the FIFO is filled, an overrun error will appear. The receiver must be
|
|
* explicitly closed by the user @sa nrfx_uart_rx_disable.
|
|
*
|
|
* @param[in] p_instance Pointer to the driver instance structure.
|
|
*/
|
|
void nrfx_uart_rx_enable(nrfx_uart_t const * p_instance);
|
|
|
|
/**
|
|
* @brief Function for disabling the receiver.
|
|
*
|
|
* This function must be called to close the receiver after it has been explicitly enabled by
|
|
* @sa nrfx_uart_rx_enable.
|
|
*
|
|
* @param[in] p_instance Pointer to the driver instance structure.
|
|
*/
|
|
void nrfx_uart_rx_disable(nrfx_uart_t const * p_instance);
|
|
|
|
/**
|
|
* @brief Function for aborting any ongoing reception.
|
|
* @note @ref NRFX_UART_EVT_TX_DONE event will be generated in non-blocking mode.
|
|
* It will contain number of bytes received until the abort was called. The event
|
|
* handler will be called from the UART interrupt context.
|
|
*
|
|
* @param[in] p_instance Pointer to the driver instance structure.
|
|
*/
|
|
void nrfx_uart_rx_abort(nrfx_uart_t const * p_instance);
|
|
|
|
/**
|
|
* @brief Function for reading error source mask. Mask contains values from @ref nrf_uart_error_mask_t.
|
|
* @note Function must be used in blocking mode only. In case of non-blocking mode, an error event is
|
|
* generated. Function clears error sources after reading.
|
|
*
|
|
* @param[in] p_instance Pointer to the driver instance structure.
|
|
*
|
|
* @return Mask of reported errors.
|
|
*/
|
|
uint32_t nrfx_uart_errorsrc_get(nrfx_uart_t const * p_instance);
|
|
|
|
|
|
#ifndef SUPPRESS_INLINE_IMPLEMENTATION
|
|
__STATIC_INLINE uint32_t nrfx_uart_task_address_get(nrfx_uart_t const * p_instance,
|
|
nrf_uart_task_t task)
|
|
{
|
|
return nrf_uart_task_address_get(p_instance->p_reg, task);
|
|
}
|
|
|
|
__STATIC_INLINE uint32_t nrfx_uart_event_address_get(nrfx_uart_t const * p_instance,
|
|
nrf_uart_event_t event)
|
|
{
|
|
return nrf_uart_event_address_get(p_instance->p_reg, event);
|
|
}
|
|
#endif // SUPPRESS_INLINE_IMPLEMENTATION
|
|
|
|
/** @} */
|
|
|
|
|
|
void nrfx_uart_0_irq_handler(void);
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif // NRFX_UART_H__
|
|
|