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Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/uart/app_uart.h')
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diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/uart/app_uart.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/uart/app_uart.h new file mode 100644 index 0000000..1858267 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/uart/app_uart.h @@ -0,0 +1,262 @@ +/** + * Copyright (c) 2013 - 2018, 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, except as embedded into a Nordic + * Semiconductor ASA integrated circuit in a product or a software update for + * such product, 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 Nordic Semiconductor ASA nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * 4. This software, with or without modification, must only be used with a + * Nordic Semiconductor ASA integrated circuit. + * + * 5. Any software provided in binary form under this license must not be reverse + * engineered, decompiled, modified and/or disassembled. + * + * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA 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. + * + */ +/**@file + * + * @defgroup app_uart UART module + * @{ + * @ingroup app_common + * + * @brief UART module interface. + */ + +#ifndef APP_UART_H__ +#define APP_UART_H__ + +#include <stdint.h> +#include <stdbool.h> +#include "app_util_platform.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define UART_PIN_DISCONNECTED 0xFFFFFFFF /**< Value indicating that no pin is connected to this UART register. */ + +/**@brief UART Flow Control modes for the peripheral. + */ +typedef enum +{ + APP_UART_FLOW_CONTROL_DISABLED, /**< UART Hw Flow Control is disabled. */ + APP_UART_FLOW_CONTROL_ENABLED, /**< Standard UART Hw Flow Control is enabled. */ +} app_uart_flow_control_t; + +/**@brief UART communication structure holding configuration settings for the peripheral. + */ +typedef struct +{ + uint32_t rx_pin_no; /**< RX pin number. */ + uint32_t tx_pin_no; /**< TX pin number. */ + uint32_t rts_pin_no; /**< RTS pin number, only used if flow control is enabled. */ + uint32_t cts_pin_no; /**< CTS pin number, only used if flow control is enabled. */ + app_uart_flow_control_t flow_control; /**< Flow control setting, if flow control is used, the system will use low power UART mode, based on CTS signal. */ + bool use_parity; /**< Even parity if TRUE, no parity if FALSE. */ + uint32_t baud_rate; /**< Baud rate configuration. */ +} app_uart_comm_params_t; + +/**@brief UART buffer for transmitting/receiving data. + */ +typedef struct +{ + uint8_t * rx_buf; /**< Pointer to the RX buffer. */ + uint32_t rx_buf_size; /**< Size of the RX buffer. */ + uint8_t * tx_buf; /**< Pointer to the TX buffer. */ + uint32_t tx_buf_size; /**< Size of the TX buffer. */ +} app_uart_buffers_t; + +/**@brief Enumeration which defines events used by the UART module upon data reception or error. + * + * @details The event type is used to indicate the type of additional information in the event + * @ref app_uart_evt_t. + */ +typedef enum +{ + APP_UART_DATA_READY, /**< An event indicating that UART data has been received. The data is available in the FIFO and can be fetched using @ref app_uart_get. */ + APP_UART_FIFO_ERROR, /**< An error in the FIFO module used by the app_uart module has occured. The FIFO error code is stored in app_uart_evt_t.data.error_code field. */ + APP_UART_COMMUNICATION_ERROR, /**< An communication error has occured during reception. The error is stored in app_uart_evt_t.data.error_communication field. */ + APP_UART_TX_EMPTY, /**< An event indicating that UART has completed transmission of all available data in the TX FIFO. */ + APP_UART_DATA, /**< An event indicating that UART data has been received, and data is present in data field. This event is only used when no FIFO is configured. */ +} app_uart_evt_type_t; + +/**@brief Struct containing events from the UART module. + * + * @details The app_uart_evt_t is used to notify the application of asynchronous events when data + * are received on the UART peripheral or in case an error occured during data reception. + */ +typedef struct +{ + app_uart_evt_type_t evt_type; /**< Type of event. */ + union + { + uint32_t error_communication; /**< Field used if evt_type is: APP_UART_COMMUNICATION_ERROR. This field contains the value in the ERRORSRC register for the UART peripheral. The UART_ERRORSRC_x defines from nrf5x_bitfields.h can be used to parse the error code. See also the \nRFXX Series Reference Manual for specification. */ + uint32_t error_code; /**< Field used if evt_type is: NRF_ERROR_x. Additional status/error code if the error event type is APP_UART_FIFO_ERROR. This error code refer to errors defined in nrf_error.h. */ + uint8_t value; /**< Field used if evt_type is: NRF_ERROR_x. Additional status/error code if the error event type is APP_UART_FIFO_ERROR. This error code refer to errors defined in nrf_error.h. */ + } data; +} app_uart_evt_t; + +/**@brief Function for handling app_uart event callback. + * + * @details Upon an event in the app_uart module this callback function will be called to notify + * the application about the event. + * + * @param[in] p_app_uart_event Pointer to UART event. + */ +typedef void (* app_uart_event_handler_t) (app_uart_evt_t * p_app_uart_event); + +/**@brief Macro for safe initialization of the UART module in a single user instance when using + * a FIFO together with UART. + * + * @param[in] P_COMM_PARAMS Pointer to a UART communication structure: app_uart_comm_params_t + * @param[in] RX_BUF_SIZE Size of desired RX buffer, must be a power of 2 or ZERO (No FIFO). + * @param[in] TX_BUF_SIZE Size of desired TX buffer, must be a power of 2 or ZERO (No FIFO). + * @param[in] EVT_HANDLER Event handler function to be called when an event occurs in the + * UART module. + * @param[in] IRQ_PRIO IRQ priority, app_irq_priority_t, for the UART module irq handler. + * @param[out] ERR_CODE The return value of the UART initialization function will be + * written to this parameter. + * + * @note Since this macro allocates a buffer and registers the module as a GPIOTE user when flow + * control is enabled, it must only be called once. + */ +#define APP_UART_FIFO_INIT(P_COMM_PARAMS, RX_BUF_SIZE, TX_BUF_SIZE, EVT_HANDLER, IRQ_PRIO, ERR_CODE) \ + do \ + { \ + app_uart_buffers_t buffers; \ + static uint8_t rx_buf[RX_BUF_SIZE]; \ + static uint8_t tx_buf[TX_BUF_SIZE]; \ + \ + buffers.rx_buf = rx_buf; \ + buffers.rx_buf_size = sizeof (rx_buf); \ + buffers.tx_buf = tx_buf; \ + buffers.tx_buf_size = sizeof (tx_buf); \ + ERR_CODE = app_uart_init(P_COMM_PARAMS, &buffers, EVT_HANDLER, IRQ_PRIO); \ + } while (0) + +/**@brief Macro for safe initialization of the UART module in a single user instance. + * + * @param[in] P_COMM_PARAMS Pointer to a UART communication structure: app_uart_comm_params_t + * @param[in] EVT_HANDLER Event handler function to be called when an event occurs in the + * UART module. + * @param[in] IRQ_PRIO IRQ priority, app_irq_priority_t, for the UART module irq handler. + * @param[out] ERR_CODE The return value of the UART initialization function will be + * written to this parameter. + * + * @note Since this macro allocates registers the module as a GPIOTE user when flow control is + * enabled, it must only be called once. + */ +#define APP_UART_INIT(P_COMM_PARAMS, EVT_HANDLER, IRQ_PRIO, ERR_CODE) \ + do \ + { \ + ERR_CODE = app_uart_init(P_COMM_PARAMS, NULL, EVT_HANDLER, IRQ_PRIO); \ + } while (0) + +/**@brief Function for initializing the UART module. Use this initialization when several instances of the UART + * module are needed. + * + * + * @note Normally single initialization should be done using the APP_UART_INIT() or + * APP_UART_INIT_FIFO() macro depending on whether the FIFO should be used by the UART, as + * that will allocate the buffers needed by the UART module (including aligning the buffer + * correctly). + + * @param[in] p_comm_params Pin and communication parameters. + * @param[in] p_buffers RX and TX buffers, NULL is FIFO is not used. + * @param[in] error_handler Function to be called in case of an error. + * @param[in] irq_priority Interrupt priority level. + * + * @retval NRF_SUCCESS If successful initialization. + * @retval NRF_ERROR_INVALID_LENGTH If a provided buffer is not a power of two. + * @retval NRF_ERROR_NULL If one of the provided buffers is a NULL pointer. + * + * The below errors are propagated by the UART module to the caller upon registration when Hardware + * Flow Control is enabled. When Hardware Flow Control is not used, these errors cannot occur. + * @retval NRF_ERROR_INVALID_STATE The GPIOTE module is not in a valid state when registering + * the UART module as a user. + * @retval NRF_ERROR_INVALID_PARAM The UART module provides an invalid callback function when + * registering the UART module as a user. + * Or the value pointed to by *p_uart_uid is not a valid + * GPIOTE number. + * @retval NRF_ERROR_NO_MEM GPIOTE module has reached the maximum number of users. + */ +uint32_t app_uart_init(const app_uart_comm_params_t * p_comm_params, + app_uart_buffers_t * p_buffers, + app_uart_event_handler_t error_handler, + app_irq_priority_t irq_priority); + +/**@brief Function for getting a byte from the UART. + * + * @details This function will get the next byte from the RX buffer. If the RX buffer is empty + * an error code will be returned and the app_uart module will generate an event upon + * reception of the first byte which is added to the RX buffer. + * + * @param[out] p_byte Pointer to an address where next byte received on the UART will be copied. + * + * @retval NRF_SUCCESS If a byte has been received and pushed to the pointer provided. + * @retval NRF_ERROR_NOT_FOUND If no byte is available in the RX buffer of the app_uart module. + */ +uint32_t app_uart_get(uint8_t * p_byte); + +/**@brief Function for putting a byte on the UART. + * + * @details This call is non-blocking. + * + * @param[in] byte Byte to be transmitted on the UART. + * + * @retval NRF_SUCCESS If the byte was successfully put on the TX buffer for transmission. + * @retval NRF_ERROR_NO_MEM If no more space is available in the TX buffer. + * NRF_ERROR_NO_MEM may occur if flow control is enabled and CTS signal + * is high for a long period and the buffer fills up. + * @retval NRF_ERROR_INTERNAL If UART driver reported error. + */ +uint32_t app_uart_put(uint8_t byte); + +/**@brief Function for flushing the RX and TX buffers (Only valid if FIFO is used). + * This function does nothing if FIFO is not used. + * + * @retval NRF_SUCCESS Flushing completed (Current implementation will always succeed). + */ +uint32_t app_uart_flush(void); + +/**@brief Function for closing the UART module. + * + * @retval NRF_SUCCESS If successfully closed. + * @retval NRF_ERROR_INVALID_PARAM If an invalid user id is provided or the user id differs from + * the current active user. + */ +uint32_t app_uart_close(void); + + + +#ifdef __cplusplus +} +#endif + +#endif //APP_UART_H__ + +/** @} */ |