diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/serial')
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/serial/nrf_serial.c | 675 | ||||
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/serial/nrf_serial.h | 397 |
2 files changed, 1072 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/serial/nrf_serial.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/serial/nrf_serial.c new file mode 100644 index 0000000..9cf89b8 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/serial/nrf_serial.c @@ -0,0 +1,675 @@ +/** + * Copyright (c) 2016 - 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. + * + */ +#include "sdk_common.h" +#if NRF_MODULE_ENABLED(NRF_SERIAL) +#include "nrf_serial.h" + +#if defined (UART_PRESENT) + +static void event_handler(nrf_serial_t const * p_serial, + nrf_serial_event_t event) +{ + if (p_serial->p_ctx->p_config->ev_handler) + { + p_serial->p_ctx->p_config->ev_handler(p_serial, event); + } +} + +static void sleep_handler(nrf_serial_t const * p_serial) +{ + if (p_serial->p_ctx->p_config->mode == NRF_SERIAL_MODE_POLLING) + { + return; + } + + if (p_serial->p_ctx->p_config->sleep_handler) + { + p_serial->p_ctx->p_config->sleep_handler(); + } +} + +static size_t serial_rx(nrf_serial_t const * p_serial, + uint8_t * p_buff, + size_t length) +{ + if (p_serial->p_ctx->p_config->mode == NRF_SERIAL_MODE_POLLING) + { + size_t rx_len = MIN(length, UINT8_MAX); + size_t len = rx_len; + + while (nrf_drv_uart_rx_ready(&p_serial->instance) && len) + { + ret_code_t ret = nrf_drv_uart_rx(&p_serial->instance, p_buff, 1); + if (ret != NRF_SUCCESS) + { + break; + } + p_buff++; + len--; + } + + return rx_len - len; + } + + nrf_queue_t const * p_rxq = p_serial->p_ctx->p_config->p_queues->p_rxq; + return nrf_queue_out(p_rxq, p_buff, length); +} + +static size_t serial_tx(nrf_serial_t const * p_serial, + uint8_t const * p_buff, + size_t length) +{ + size_t tx_len = 0; + + if (p_serial->p_ctx->p_config->mode == NRF_SERIAL_MODE_POLLING) + { + tx_len = MIN(length, UINT8_MAX); + ret_code_t ret = nrf_drv_uart_tx(&p_serial->instance, p_buff, tx_len); + ASSERT(ret == NRF_SUCCESS) + return tx_len; + } + + nrf_queue_t const * p_txq = p_serial->p_ctx->p_config->p_queues->p_txq; + nrf_serial_buffers_t const * p_buffs = p_serial->p_ctx->p_config->p_buffers; + + /* Try to enqueue data. */ + size_t queue_in_len = nrf_queue_in(p_txq, p_buff, length); + if (nrf_drv_uart_tx_in_progress(&p_serial->instance)) + { + return queue_in_len; + } + + size_t len = nrf_queue_out(p_txq, p_buffs->p_txb, p_buffs->tx_size); + ASSERT(len > 0); + ret_code_t ret = nrf_drv_uart_tx(&p_serial->instance, p_buffs->p_txb, len); + ASSERT(ret == NRF_SUCCESS); + + return queue_in_len; +} + +static void uart_event_handler(nrf_drv_uart_event_t * p_event, void * p_context) +{ + uint32_t ret; + nrf_serial_t const * p_serial = p_context; + + switch (p_event->type) + { + case NRF_DRV_UART_EVT_RX_DONE: + { + nrf_queue_t const * p_rxq = + p_serial->p_ctx->p_config->p_queues->p_rxq; + size_t len = nrf_queue_in(p_rxq, + p_event->data.rxtx.p_data, + p_event->data.rxtx.bytes); + + if (len < p_event->data.rxtx.bytes) + { + event_handler(p_serial, NRF_SERIAL_EVENT_FIFO_ERR); + break; + } + + event_handler(p_serial, NRF_SERIAL_EVENT_RX_DATA); + nrf_serial_buffers_t const * p_buffs = + p_serial->p_ctx->p_config->p_buffers; + + ret = nrf_drv_uart_rx(&p_serial->instance, + p_buffs->p_rxb, + p_buffs->rx_size); + ASSERT(ret == NRF_SUCCESS); + break; + } + case NRF_DRV_UART_EVT_ERROR: + { + event_handler(p_serial, NRF_SERIAL_EVENT_DRV_ERR); + break; + } + case NRF_DRV_UART_EVT_TX_DONE: + { + nrf_queue_t const * p_txq = + p_serial->p_ctx->p_config->p_queues->p_txq; + nrf_serial_buffers_t const * p_buffs = + p_serial->p_ctx->p_config->p_buffers; + + event_handler(p_serial, NRF_SERIAL_EVENT_TX_DONE); + size_t len = nrf_queue_out(p_txq, p_buffs->p_txb, p_buffs->tx_size); + if (len == 0) + { + break; + } + + ret = nrf_drv_uart_tx(&p_serial->instance, p_buffs->p_txb, len); + ASSERT(ret == NRF_SUCCESS); + break; + } + default: + break; + } +} + +ret_code_t nrf_serial_init(nrf_serial_t const * p_serial, + nrf_drv_uart_config_t const * p_drv_uart_config, + nrf_serial_config_t const * p_config) +{ + ret_code_t ret; + ASSERT(p_serial && p_drv_uart_config && p_config); + + if (p_serial->p_ctx->p_config) + { + /*Already initialized.*/ + return NRF_ERROR_MODULE_ALREADY_INITIALIZED; + } + + if (p_config->mode != NRF_SERIAL_MODE_POLLING) + { + ASSERT(p_config->p_queues && p_config->p_buffers); + } + + nrf_drv_uart_config_t drv_config; + memcpy(&drv_config, p_drv_uart_config, sizeof(nrf_drv_uart_config_t)); + drv_config.p_context = (void *)p_serial; +#if defined(UARTE_PRESENT) && defined(UART_PRESENT) + drv_config.use_easy_dma = (p_config->mode == NRF_SERIAL_MODE_DMA); +#endif + ret = nrf_drv_uart_init(&p_serial->instance, + &drv_config, + p_config->mode == NRF_SERIAL_MODE_POLLING ? + NULL : uart_event_handler); + if (ret != NRF_SUCCESS) + { + return ret; + } + + p_serial->p_ctx->p_config = p_config; + + if (p_serial->p_ctx->p_config->p_queues) + { + nrf_queue_reset(p_serial->p_ctx->p_config->p_queues->p_txq); + nrf_queue_reset(p_serial->p_ctx->p_config->p_queues->p_rxq); + } + + nrf_mtx_init(&p_serial->p_ctx->read_lock); + nrf_mtx_init(&p_serial->p_ctx->write_lock); + + p_serial->p_ctx->flags = NRF_SERIAL_RX_ENABLED_FLAG | + NRF_SERIAL_TX_ENABLED_FLAG; + + if (drv_config.pseltxd == NRF_UART_PSEL_DISCONNECTED) + { + p_serial->p_ctx->flags &= ~NRF_SERIAL_TX_ENABLED_FLAG; + } + + if (drv_config.pselrxd == NRF_UART_PSEL_DISCONNECTED) + { + p_serial->p_ctx->flags &= ~NRF_SERIAL_RX_ENABLED_FLAG; + return NRF_SUCCESS; + } + + if (p_serial->p_ctx->p_config->mode != NRF_SERIAL_MODE_DMA) + { + nrf_drv_uart_rx_enable(&p_serial->instance); + if (p_serial->p_ctx->p_config->mode == NRF_SERIAL_MODE_POLLING) + { + return NRF_SUCCESS; + } + } + + return nrf_drv_uart_rx(&p_serial->instance, + p_serial->p_ctx->p_config->p_buffers->p_rxb, + p_serial->p_ctx->p_config->p_buffers->rx_size); +} + +ret_code_t nrf_serial_uninit(nrf_serial_t const * p_serial) +{ + ASSERT(p_serial); + + if (!p_serial->p_ctx->p_config) + { + /*Already uninitialized.*/ + return NRF_ERROR_MODULE_NOT_INITIALIZED; + } + + if (!nrf_mtx_trylock(&p_serial->p_ctx->write_lock)) + { + return NRF_ERROR_BUSY; + } + if (!nrf_mtx_trylock(&p_serial->p_ctx->read_lock)) + { + nrf_mtx_unlock(&p_serial->p_ctx->write_lock); + return NRF_ERROR_BUSY; + } + + nrf_drv_uart_uninit(&p_serial->instance); + if (p_serial->p_ctx->p_config->p_queues) + { + nrf_queue_reset(p_serial->p_ctx->p_config->p_queues->p_txq); + nrf_queue_reset(p_serial->p_ctx->p_config->p_queues->p_rxq); + } + + memset(p_serial->p_ctx, 0, sizeof(nrf_serial_ctx_t)); + return NRF_SUCCESS; +} + +typedef struct { + volatile bool expired; +} nrf_serial_timeout_ctx_t; + +static void serial_timeout_handler(void * p_context) +{ + nrf_serial_timeout_ctx_t * p_tout_ctx = p_context; + p_tout_ctx->expired = true; +} + + +static ret_code_t timeout_setup(nrf_serial_t const * p_serial, + app_timer_id_t const * p_timer_id, + uint32_t timeout_ms, + nrf_serial_timeout_ctx_t * p_tout_ctx) +{ + uint32_t ticks = APP_TIMER_TICKS(timeout_ms); + + if (ticks < APP_TIMER_MIN_TIMEOUT_TICKS) + { + p_tout_ctx->expired = true; + return NRF_SUCCESS; + } + + ret_code_t ret = app_timer_create(p_timer_id, + APP_TIMER_MODE_SINGLE_SHOT, + serial_timeout_handler); + if (ret != NRF_SUCCESS) + { + return ret; + } + + return app_timer_start(*p_timer_id, ticks, p_tout_ctx); +} + +ret_code_t nrf_serial_write(nrf_serial_t const * p_serial, + void const * p_data, + size_t size, + size_t * p_written, + uint32_t timeout_ms) +{ + ret_code_t ret; + + ASSERT(p_serial); + if (!p_serial->p_ctx->p_config) + { + return NRF_ERROR_MODULE_NOT_INITIALIZED; + } + + if (!(p_serial->p_ctx->flags & NRF_SERIAL_TX_ENABLED_FLAG)) + { + return NRF_ERROR_INVALID_STATE; + } + + if (size == 0) + { + return NRF_SUCCESS; + } + + if (!nrfx_is_in_ram(p_data) && + p_serial->p_ctx->p_config->mode == NRF_SERIAL_MODE_DMA) + { + return NRF_ERROR_INVALID_ADDR; + } + + if (!nrf_mtx_trylock(&p_serial->p_ctx->write_lock)) + { + return NRF_ERROR_BUSY; + } + + nrf_serial_timeout_ctx_t tout_ctx = { + .expired = false, + }; + + if (timeout_ms != NRF_SERIAL_MAX_TIMEOUT) + { + ret = timeout_setup(p_serial, + p_serial->p_tx_timer, + timeout_ms, + &tout_ctx); + if (ret != NRF_SUCCESS) + { + nrf_mtx_unlock(&p_serial->p_ctx->write_lock); + return ret; + } + } + + size_t left = size; + uint8_t const * p_buff = p_data; + + do + { + size_t wcnt = serial_tx(p_serial, p_buff, left); + left -= wcnt; + p_buff += wcnt; + if (!left) + { + break; + } + + sleep_handler(p_serial); + } while (!tout_ctx.expired); + + if (p_written) + { + *p_written = size - left; + } + + if (!tout_ctx.expired && (timeout_ms != NRF_SERIAL_MAX_TIMEOUT)) + { + (void)app_timer_stop(*p_serial->p_tx_timer); + } + + nrf_mtx_unlock(&p_serial->p_ctx->write_lock); + if (left && tout_ctx.expired) + { + return NRF_ERROR_TIMEOUT; + } + + return NRF_SUCCESS; +} + +ret_code_t nrf_serial_read(nrf_serial_t const * p_serial, + void * p_data, + size_t size, + size_t * p_read, + uint32_t timeout_ms) +{ + ret_code_t ret; + + ASSERT(p_serial); + if (!p_serial->p_ctx->p_config) + { + return NRF_ERROR_MODULE_NOT_INITIALIZED; + } + + if (!(p_serial->p_ctx->flags & NRF_SERIAL_RX_ENABLED_FLAG)) + { + return NRF_ERROR_INVALID_STATE; + } + + if (size == 0) + { + return NRF_SUCCESS; + } + + if (!nrf_mtx_trylock(&p_serial->p_ctx->read_lock)) + { + return NRF_ERROR_BUSY; + } + + nrf_serial_timeout_ctx_t tout_ctx = { + .expired = false, + }; + + if (timeout_ms != NRF_SERIAL_MAX_TIMEOUT) + { + ret = timeout_setup(p_serial, + p_serial->p_rx_timer, + timeout_ms, + &tout_ctx); + + if (ret != NRF_SUCCESS) + { + nrf_mtx_unlock(&p_serial->p_ctx->read_lock); + return ret; + } + } + + size_t left = size; + uint8_t * p_buff = p_data; + do + { + size_t rcnt = serial_rx(p_serial, p_buff, left); + left -= rcnt; + p_buff += rcnt; + if (!left) + { + break; + } + + if (tout_ctx.expired) + { + if (p_serial->p_ctx->p_config->mode != NRF_SERIAL_MODE_POLLING) + { + nrf_drv_uart_rx_abort(&p_serial->instance); + } + break; + } + + sleep_handler(p_serial); + } while (1); + + if (p_read) + { + *p_read = size - left; + } + + if (!tout_ctx.expired && (timeout_ms != NRF_SERIAL_MAX_TIMEOUT)) + { + (void)app_timer_stop(*p_serial->p_rx_timer); + } + + nrf_mtx_unlock(&p_serial->p_ctx->read_lock); + if (left && tout_ctx.expired) + { + return NRF_ERROR_TIMEOUT; + } + + return NRF_SUCCESS; +} + +ret_code_t nrf_serial_flush(nrf_serial_t const * p_serial, uint32_t timeout_ms) +{ + + ret_code_t ret; + + ASSERT(p_serial); + if (!p_serial->p_ctx->p_config) + { + return NRF_ERROR_MODULE_NOT_INITIALIZED; + } + + if (!(p_serial->p_ctx->flags & NRF_SERIAL_TX_ENABLED_FLAG)) + { + return NRF_ERROR_INVALID_STATE; + } + + if (p_serial->p_ctx->p_config->mode == NRF_SERIAL_MODE_POLLING) + { + return NRF_SUCCESS; + } + + if (!nrf_mtx_trylock(&p_serial->p_ctx->write_lock)) + { + return NRF_ERROR_BUSY; + } + + nrf_serial_timeout_ctx_t tout_ctx = { + .expired = false, + }; + + if (timeout_ms != NRF_SERIAL_MAX_TIMEOUT) + { + ret = timeout_setup(p_serial, + p_serial->p_tx_timer, + timeout_ms, + &tout_ctx); + if (ret != NRF_SUCCESS) + { + nrf_mtx_unlock(&p_serial->p_ctx->write_lock); + return ret; + } + } + + bool empty; + do + { + empty = nrf_queue_is_empty(p_serial->p_ctx->p_config->p_queues->p_txq) + && !nrf_drv_uart_tx_in_progress(&p_serial->instance); + if (empty) + { + break; + } + + sleep_handler(p_serial); + } while (!tout_ctx.expired); + + if (!tout_ctx.expired && (timeout_ms != NRF_SERIAL_MAX_TIMEOUT)) + { + (void)app_timer_stop(*p_serial->p_tx_timer); + } + + nrf_mtx_unlock(&p_serial->p_ctx->write_lock); + if (!empty && tout_ctx.expired) + { + return NRF_ERROR_TIMEOUT; + } + + return NRF_SUCCESS; +} + +ret_code_t nrf_serial_tx_abort(nrf_serial_t const * p_serial) +{ + ASSERT(p_serial); + if (!p_serial->p_ctx->p_config) + { + return NRF_ERROR_MODULE_NOT_INITIALIZED; + } + + if (!(p_serial->p_ctx->flags & NRF_SERIAL_TX_ENABLED_FLAG)) + { + return NRF_ERROR_INVALID_STATE; + } + + if (!nrf_mtx_trylock(&p_serial->p_ctx->write_lock)) + { + return NRF_ERROR_BUSY; + } + + nrf_drv_uart_tx_abort(&p_serial->instance); + if (p_serial->p_ctx->p_config->p_queues->p_txq) + { + nrf_queue_reset(p_serial->p_ctx->p_config->p_queues->p_txq); + } + + nrf_mtx_unlock(&p_serial->p_ctx->write_lock); + return NRF_SUCCESS; +} + +ret_code_t nrf_serial_rx_drain(nrf_serial_t const * p_serial) +{ + ASSERT(p_serial); + if (!p_serial->p_ctx->p_config) + { + return NRF_ERROR_MODULE_NOT_INITIALIZED; + } + + if (!(p_serial->p_ctx->flags & NRF_SERIAL_RX_ENABLED_FLAG)) + { + return NRF_ERROR_INVALID_STATE; + } + + if (!nrf_mtx_trylock(&p_serial->p_ctx->read_lock)) + { + return NRF_ERROR_BUSY; + } + + uint8_t c; + /*Drain HW FIFO*/ + while (serial_rx(p_serial, &c, sizeof(c))) + { + + } + + /*Drain SW FIFO*/ + if (p_serial->p_ctx->p_config->p_queues->p_rxq) + { + nrf_queue_reset(p_serial->p_ctx->p_config->p_queues->p_rxq); + } + nrf_mtx_unlock(&p_serial->p_ctx->read_lock); + return NRF_SUCCESS; +} +#else +ret_code_t nrf_serial_init(nrf_serial_t const * p_serial, + nrf_drv_uart_config_t const * p_drv_uart_config, + nrf_serial_config_t const * p_config) +{ + return NRF_ERROR_NOT_SUPPORTED; +} + +ret_code_t nrf_serial_uninit(nrf_serial_t const * p_serial) +{ + return NRF_ERROR_NOT_SUPPORTED; +} +ret_code_t nrf_serial_write(nrf_serial_t const * p_serial, + void const * p_data, + size_t size, + size_t * p_written, + uint32_t timeout_ms) +{ + return NRF_ERROR_NOT_SUPPORTED; +} +ret_code_t nrf_serial_read(nrf_serial_t const * p_serial, + void * p_data, + size_t size, + size_t * p_read, + uint32_t timeout_ms) +{ + return NRF_ERROR_NOT_SUPPORTED; +} +ret_code_t nrf_serial_flush(nrf_serial_t const * p_serial, uint32_t timeout_ms) +{ + return NRF_ERROR_NOT_SUPPORTED; +} +ret_code_t nrf_serial_tx_abort(nrf_serial_t const * p_serial) +{ + return NRF_ERROR_NOT_SUPPORTED; +} +ret_code_t nrf_serial_rx_drain(nrf_serial_t const * p_serial) +{ + return NRF_ERROR_NOT_SUPPORTED; +} + +#endif // UART_PRESENT +#endif //NRF_MODULE_ENABLED(NRF_SERIAL) + diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/serial/nrf_serial.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/serial/nrf_serial.h new file mode 100644 index 0000000..167e373 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/serial/nrf_serial.h @@ -0,0 +1,397 @@ +/** + * Copyright (c) 2016 - 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. + * + */ +#ifndef NRF_SERIAL_H__ +#define NRF_SERIAL_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +#include <stdint.h> +#include <stdbool.h> + +#include "nrf_drv_uart.h" +#include "nrf_queue.h" +#include "nrf_mtx.h" +#include "app_timer.h" + +/**@file + * + * @defgroup nrf_serial Serial port abstraction layer + * @{ + * @ingroup app_common + * + * @brief Serial module interface. + * @details This module is more sophisticated than @ref nrf_drv_uart. It internally uses + * mutex, queues, and app_timer. You can configure it to work in three different modes + * (polling, interrupt, DMA). API can be configured to work in synchronous mode. Both read and write + * methods have a timeout parameter. Asynchronous mode is available by passing 0 as the + * timeout parameter. + * @warning Do not use synchronous API (timeout_ms parameter > 0) in IRQ + * context. It may lead to a deadlock because the timeout interrupt cannot + * preempt the current IRQ context. + */ + +typedef struct nrf_serial_s nrf_serial_t; + +/** + * @brief Serial port mode. + * */ +typedef enum { + NRF_SERIAL_MODE_POLLING, /**< Polling mode.*/ + NRF_SERIAL_MODE_IRQ, /**< Interrupt mode.*/ + NRF_SERIAL_MODE_DMA, /**< DMA mode.*/ +} nrf_serial_mode_t; + + + +/** + * @brief Creates an instance of @ref nrf_drv_uart_config_t. + * + * @param _name Instance name. + * @param _rx_pin RX pin number. + * @param _tx_pin TX pin number. + * @param _rts_pin RTS pin number. + * @param _cts_pin CTS pin number. + * @param _flow_control Flow control enable/disable (@ref nrf_uart_hwfc_t). + * @param _parity Parity enable/disable (@ref nrf_uart_parity_t). + * @param _baud_rate Baud rate (@ref nrf_uart_baudrate_t). + * @param _irq_prio Interrupt priority. + * + * */ +#define NRF_SERIAL_DRV_UART_CONFIG_DEF(_name, \ + _rx_pin, \ + _tx_pin, \ + _rts_pin, \ + _cts_pin, \ + _flow_control, \ + _parity, \ + _baud_rate, \ + _irq_prio) \ + static const nrf_drv_uart_config_t _name = { \ + .pselrxd = _rx_pin, \ + .pseltxd = _tx_pin, \ + .pselrts = _rts_pin, \ + .pselcts = _cts_pin, \ + .hwfc = _flow_control, \ + .parity = _parity, \ + .baudrate = _baud_rate, \ + .interrupt_priority = _irq_prio, \ + } + +/** + * @brief Serial port RX and TX queues. + * + * @note Use the @ref NRF_SERIAL_QUEUES_DEF macro to create an instance of this + * structure. + * */ +typedef struct { + nrf_queue_t const * p_rxq; //!< Receive queue handle. + nrf_queue_t const * p_txq; //!< Transmit queue handle. +} nrf_serial_queues_t; + +/** + * @brief Creates an instance of serial port queues. + * + * @param _name Instance name. + * @param _tx_size TX queue size. + * @param _rx_size RX queue size. + * */ +#define NRF_SERIAL_QUEUES_DEF(_name, _tx_size, _rx_size) \ + NRF_QUEUE_DEF(uint8_t, _name##_rxq, _rx_size, NRF_QUEUE_MODE_NO_OVERFLOW); \ + NRF_QUEUE_DEF(uint8_t, _name##_txq, _tx_size, NRF_QUEUE_MODE_NO_OVERFLOW); \ + static const nrf_serial_queues_t _name = { \ + .p_rxq = &_name##_rxq, \ + .p_txq = &_name##_txq, \ + } + +/** + * @brief Serial buffers. Data slices used by @ref nrf_drv_uart_tx and + * @ref nrf_drv_uart_rx. + * + * @note Use the @ref NRF_SERIAL_BUFFERS_DEF macro to create an instance of this + * structure. + * */ +typedef struct { + void * p_txb; //!< TX buffer. + void * p_rxb; //!< RX buffer. + uint8_t tx_size; //!< TX buffer size. + uint8_t rx_size; //!< RX buffer size. +} nrf_serial_buffers_t; + +/** + * @brief Creates an instance of serial port buffers. + * + * @param _name Instance name. + * @param _tx_size TX buffer size. + * @param _rx_size RX buffer size. + * */ +#define NRF_SERIAL_BUFFERS_DEF(_name, _tx_size, _rx_size) \ + STATIC_ASSERT((_tx_size) <= UINT8_MAX); \ + STATIC_ASSERT((_rx_size) <= UINT8_MAX); \ + static uint8_t _name##_txb[_tx_size]; \ + static uint8_t _name##_rxb[_rx_size]; \ + static const nrf_serial_buffers_t _name = { \ + .p_txb = _name##_txb, \ + .p_rxb = _name##_rxb, \ + .tx_size = sizeof(_name##_txb), \ + .rx_size = sizeof(_name##_rxb), \ + } + +/** + * @brief Events generated by this module. + * */ +typedef enum { + NRF_SERIAL_EVENT_TX_DONE, //!< Chunk of data has been sent. + NRF_SERIAL_EVENT_RX_DATA, //!< New chunk of data has been received. + NRF_SERIAL_EVENT_DRV_ERR, //!< Internal driver error. + NRF_SERIAL_EVENT_FIFO_ERR, //!< RX FIFO overrun. +} nrf_serial_event_t; + +/** + * @brief Event handler type. + * */ +typedef void (*nrf_serial_evt_handler_t)(struct nrf_serial_s const * p_serial, + nrf_serial_event_t event); + +/** + * @brief Sleep handler type. + * */ +typedef void (*nrf_serial_sleep_handler_t)(void); + +/** + * @brief Configuration of UART serial interface. + * + * @note Use the @ref NRF_SERIAL_CONFIG_DEF macro to create an instance of this + * structure. + * + */ +typedef struct { + nrf_serial_mode_t mode; //!< Serial port mode. + + nrf_serial_queues_t const * p_queues; //!< Serial port queues. + nrf_serial_buffers_t const * p_buffers; //!< DMA buffers. + nrf_serial_evt_handler_t ev_handler; //!< Event handler. + nrf_serial_sleep_handler_t sleep_handler; //!< Sleep mode handler. +} nrf_serial_config_t; + +/** + * @brief Creates an instance of serial port configuration. + * + * @param _name Instance name. + * @param _mode Serial port mode. + * @param _queues Serial port queues. NULL can be passed in @ref NRF_SERIAL_MODE_POLLING mode. + * @param _buffers Serial port buffers. NULL can be passed in @ref NRF_SERIAL_MODE_POLLING mode. + * @param _ev_handler Serial port event handler. NULL can be passed in any mode. + * @param _sleep Serial port sleep handler. NULL can be passed in any mode. + * */ +#define NRF_SERIAL_CONFIG_DEF(_name, _mode, _queues, _buffers, _ev_handler, _sleep) \ + static const nrf_serial_config_t _name = { \ + .mode = _mode, \ + .p_queues = _queues, \ + .p_buffers = _buffers, \ + .ev_handler = _ev_handler, \ + .sleep_handler = _sleep, \ + } + +#define NRF_SERIAL_RX_ENABLED_FLAG (1u << 0) //!< Receiver enable flag. +#define NRF_SERIAL_TX_ENABLED_FLAG (1u << 1) //!< Transmitter enable flag. + +/** + * @brief Serial port context. Contains all data structures that need + * to be stored in RAM memory. + * */ +typedef struct { + nrf_serial_config_t const * p_config; //!< Serial port configuration. + + nrf_mtx_t write_lock; //!< Write operation lock. + nrf_mtx_t read_lock; //!< Read operation lock. + + uint8_t flags; //!< Transmitter/receiver enable flags. +} nrf_serial_ctx_t; + +/** + * @brief Serial port instance declaration. + * + * @note Use @ref NRF_SERIAL_UART_DEF macro to create an instance of this + * structure. + * */ +struct nrf_serial_s { + nrf_drv_uart_t instance; //!< Driver instance. + nrf_serial_ctx_t * p_ctx; //!< Driver context. + + app_timer_id_t const * p_tx_timer; //!< TX timeout timer. + app_timer_id_t const * p_rx_timer; //!< RX timeout timer. +}; + +/** + * @brief Creates an instance of a serial port. + * + * @param _name Instance name. + * @param _instance_number Driver instance number (@ref NRF_DRV_UART_INSTANCE). + * */ +#define NRF_SERIAL_UART_DEF(_name, _instance_number) \ + APP_TIMER_DEF(_name##_rx_timer); \ + APP_TIMER_DEF(_name##_tx_timer); \ + static nrf_serial_ctx_t _name##_ctx; \ + static const nrf_serial_t _name = { \ + .instance = NRF_DRV_UART_INSTANCE(_instance_number), \ + .p_ctx = &_name##_ctx, \ + .p_tx_timer = &_name##_tx_timer, \ + .p_rx_timer = &_name##_rx_timer, \ + } + + +/** + * @brief Maximum value of timeout. API might be blocked indefinitely if this value is + * not set.*/ +#define NRF_SERIAL_MAX_TIMEOUT UINT32_MAX + +/** + * @brief Function for initializing a serial port. Serial port can be initialized + * in various modes that are defined by nrf_serial_mode_t. + * - NRF_SERIAL_MODE_POLLING - Simple polling mode. API calls will be + * synchronous. There is no need to define queues or buffers. + * No events will be generated. + * - NRF_SERIAL_MODE_IRQ - Interrupt mode. API can be set to work in synchronous or + * asynchronous mode. Queues and buffers must be passed + * during initialization. Events will be generated if + * a non NULL handler is passed as the ev_handler parameter. + * - NRF_SERIAL_MODE_DMA - Similar to @ref NRF_SERIAL_MODE_IRQ. Uses EasyDMA. + * + * + * @param p_serial Serial port instance. + * @param p_drv_uart_config UART driver configuration. Cannot be NULL. + * @param p_config Serial port configuration. Cannot be NULL. This object must be created + * using the @ref NRF_SERIAL_CONFIG_DEF macro. + * + * @return Standard error code. + * */ +ret_code_t nrf_serial_init(nrf_serial_t const * p_serial, + nrf_drv_uart_config_t const * p_drv_uart_config, + nrf_serial_config_t const * p_config); + + +/** + * @brief Function for uninitializing a serial port. + * + * @param p_serial Serial port instance. + * + * @return Standard error code. + * */ +ret_code_t nrf_serial_uninit(nrf_serial_t const * p_serial); + + +/** + * @brief Function for writing to a serial port. + * + * @param p_serial Serial port instance. + * @param p_data Transmit buffer pointer. + * @param size Transmit buffer size. + * @param p_written Amount of data actually written to the serial port. + * NULL pointer can be passed. + * @param timeout_ms Operation timeout, in milliseconds. Pass 0 to operate in + * non blocking mode. + * + * @return Standard error code. + * */ +ret_code_t nrf_serial_write(nrf_serial_t const * p_serial, + void const * p_data, + size_t size, + size_t * p_written, + uint32_t timeout_ms); + +/** + * @brief Function for reading from a serial port. + * + * @param p_serial Serial port instance. + * @param p_data Receive buffer pointer. + * @param size Receive buffer size. + * @param p_read Amount of data actually read from the serial port. + * NULL pointer can be passed. + * @param timeout_ms Operation timeout, in milliseconds. Pass 0 to operate in + * non blocking mode. + * + * @return Standard error code. + * */ +ret_code_t nrf_serial_read(nrf_serial_t const * p_serial, + void * p_data, + size_t size, + size_t * p_read, + uint32_t timeout_ms); + +/** + * @brief Function for flushing a serial port TX queue. + * + * @param p_serial Serial port instance. + * @param timeout_ms Operation timeout, in milliseconds. Pass 0 to operate in + * non blocking mode. + * @return Standard error code. + * */ +ret_code_t nrf_serial_flush(nrf_serial_t const * p_serial, uint32_t timeout_ms); + + +/** + * @brief Function for aborting a serial port transmission. + * Aborts the current ongoing transmission and resets TX FIFO. + * + * @param p_serial Serial port instance. + * + * @return Standard error code. + * */ +ret_code_t nrf_serial_tx_abort(nrf_serial_t const * p_serial); + +/** + * @brief Function for draining the serial port receive RX FIFO. + * Drains HW FIFO and resets RX FIFO. + * + * @param p_serial Serial port instance. + * + * @return Standard error code. + * */ +ret_code_t nrf_serial_rx_drain(nrf_serial_t const * p_serial); + +/** @} */ + +#ifdef __cplusplus +} +#endif + +#endif /* NRF_SERIAL_H__ */ |