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Diff: targets/TARGET_NORDIC/TARGET_NRF5/serial_api.c
- Revision:
- 149:156823d33999
- Child:
- 150:02e0a0aed4ec
diff -r 21d94c44109e -r 156823d33999 targets/TARGET_NORDIC/TARGET_NRF5/serial_api.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/TARGET_NORDIC/TARGET_NRF5/serial_api.c Fri Oct 28 11:17:30 2016 +0100 @@ -0,0 +1,638 @@ +/* + * Copyright (c) 2013 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 or object form under this license must not be reverse + * engineered, decompiled, modified and/or disassembled. + * + * 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. + * + */ + +#include "serial_api.h" + +#if DEVICE_SERIAL + +#include <string.h> +#include "mbed_assert.h" +#include "mbed_error.h" +#include "nrf_uart.h" +#include "nrf_drv_common.h" +#include "nrf_drv_config.h" +#include "app_util_platform.h" +#include "nrf_gpio.h" + +#define UART_INSTANCE_COUNT 1 +#define UART_INSTANCE NRF_UART0 +#define UART_IRQn UART0_IRQn +#define UART_IRQ_HANDLER UART0_IRQHandler +#define UART_INSTANCE_ID 0 +#define UART_CB uart_cb[UART_INSTANCE_ID] + +#define UART_DEFAULT_BAUDRATE UART0_CONFIG_BAUDRATE +#define UART_DEFAULT_PARITY UART0_CONFIG_PARITY + +// expected the macro from mbed configuration system +#ifndef MBED_CONF_NORDIC_UART_HWFC + #define MBED_CONF_NORDIC_UART_HWFC 1 + #warning None of UART flow control configuration (expected macro MBED_CONF_NORDIC_UART_HWFC). The RTSCTS flow control is used by default . +#endif + +#if MBED_CONF_NORDIC_UART_HWFC == 1 + #define UART_DEFAULT_HWFC UART0_CONFIG_HWFC +#else + #define UART_DEFAULT_HWFC NRF_UART_HWFC_DISABLED +#endif + +#define UART_DEFAULT_CTS UART0_CONFIG_PSEL_CTS +#define UART_DEFAULT_RTS UART0_CONFIG_PSEL_RTS + +// Required by "retarget.cpp". +int stdio_uart_inited = 0; +serial_t stdio_uart; + +typedef struct { + bool initialized; + uint32_t irq_context; + uart_irq_handler irq_handler; + + uint32_t pselrxd; + uint32_t pseltxd; + uint32_t pselcts; + uint32_t pselrts; + nrf_uart_hwfc_t hwfc; + nrf_uart_parity_t parity; + nrf_uart_baudrate_t baudrate; + +#if DEVICE_SERIAL_ASYNCH + bool volatile rx_active; + uint8_t *rx_buffer; + size_t rx_length; + size_t rx_pos; + void (*rx_asynch_handler)(); + uint8_t char_match; + + bool volatile tx_active; + const uint8_t *tx_buffer; + size_t tx_length; + size_t tx_pos; + void (*tx_asynch_handler)(); + + uint32_t events_wanted; + uint32_t events_occured; + + #define UART_IRQ_TX 1 + #define UART_IRQ_RX 2 + uint8_t irq_enabled; +#endif // DEVICE_SERIAL_ASYNCH +} uart_ctlblock_t; + +static uart_ctlblock_t uart_cb[UART_INSTANCE_COUNT]; + + +#if DEVICE_SERIAL_ASYNCH +static void end_asynch_rx(void) +{ + // If RX interrupt is activated for synchronous operations, + // don't disable it, just stop handling it here. + if (!(UART_CB.irq_enabled & UART_IRQ_RX)) { + nrf_uart_int_disable(UART_INSTANCE, NRF_UART_INT_MASK_RXDRDY); + } + UART_CB.rx_active = false; +} +static void end_asynch_tx(void) +{ + // If TX interrupt is activated for synchronous operations, + // don't disable it, just stop handling it here. + if (!(UART_CB.irq_enabled & UART_IRQ_TX)) { + nrf_uart_int_disable(UART_INSTANCE, NRF_UART_INT_MASK_TXDRDY); + } + UART_CB.tx_active = false; +} +#endif // DEVICE_SERIAL_ASYNCH + +void UART_IRQ_HANDLER(void) +{ + if (nrf_uart_int_enable_check(UART_INSTANCE, NRF_UART_INT_MASK_RXDRDY) && + nrf_uart_event_check(UART_INSTANCE, NRF_UART_EVENT_RXDRDY)) { + + #if DEVICE_SERIAL_ASYNCH + if (UART_CB.rx_active) { + nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_RXDRDY); + + uint8_t rx_data = nrf_uart_rxd_get(UART_INSTANCE); + UART_CB.rx_buffer[UART_CB.rx_pos] = rx_data; + + bool end_rx = false; + // If character matching should be performed, check if the current + // data matches the given one. + if (UART_CB.char_match != SERIAL_RESERVED_CHAR_MATCH && + rx_data == UART_CB.char_match) { + // If it does, report the match and abort further receiving. + UART_CB.events_occured |= SERIAL_EVENT_RX_CHARACTER_MATCH; + if (UART_CB.events_wanted & SERIAL_EVENT_RX_CHARACTER_MATCH) { + end_rx = true; + } + } + if (++UART_CB.rx_pos >= UART_CB.rx_length) { + UART_CB.events_occured |= SERIAL_EVENT_RX_COMPLETE; + end_rx = true; + } + if (end_rx) { + end_asynch_rx(); + + if (UART_CB.rx_asynch_handler) { + // Use local variable to make it possible to start a next + // transfer from callback routine. + void (*handler)() = UART_CB.rx_asynch_handler; + UART_CB.rx_asynch_handler = NULL; + handler(); + } + } + } + else + #endif + + if (UART_CB.irq_handler) { + UART_CB.irq_handler(UART_CB.irq_context, RxIrq); + } + } + + if (nrf_uart_int_enable_check(UART_INSTANCE, NRF_UART_INT_MASK_TXDRDY) && + nrf_uart_event_check(UART_INSTANCE, NRF_UART_EVENT_TXDRDY)) { + + #if DEVICE_SERIAL_ASYNCH + if (UART_CB.tx_active) { + if (++UART_CB.tx_pos <= UART_CB.tx_length) { + // When there is still something to send, clear the TXDRDY event + // and put next byte to transmitter. + nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_TXDRDY); + nrf_uart_txd_set(UART_INSTANCE, + UART_CB.tx_buffer[UART_CB.tx_pos]); + } + else { + // When the TXDRDY event is set after the last byte to be sent + // has been passed to the transmitter, the job is done and TX + // complete can be indicated. + // Don't clear the TXDRDY event, it needs to remain set for the + // 'serial_writable' function to work properly. + end_asynch_tx(); + + UART_CB.events_occured |= SERIAL_EVENT_TX_COMPLETE; + if (UART_CB.tx_asynch_handler) { + // Use local variable to make it possible to start a next + // transfer from callback routine. + void (*handler)() = UART_CB.tx_asynch_handler; + UART_CB.tx_asynch_handler = NULL; + handler(); + } + } + } + else + #endif + + if (UART_CB.irq_handler) { + UART_CB.irq_handler(UART_CB.irq_context, TxIrq); + } + } + +#if DEVICE_SERIAL_ASYNCH + if (nrf_uart_event_check(UART_INSTANCE, NRF_UART_EVENT_ERROR)) { + nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_ERROR); + + uint8_t errorsrc = nrf_uart_errorsrc_get_and_clear(UART_INSTANCE); + if (UART_CB.rx_asynch_handler) { + UART_CB.events_occured |= SERIAL_EVENT_ERROR; + if (errorsrc & NRF_UART_ERROR_PARITY_MASK) { + UART_CB.events_occured |= SERIAL_EVENT_RX_PARITY_ERROR; + } + if (errorsrc & NRF_UART_ERROR_FRAMING_MASK) { + UART_CB.events_occured |= SERIAL_EVENT_RX_FRAMING_ERROR; + } + if (errorsrc & NRF_UART_ERROR_OVERRUN_MASK) { + UART_CB.events_occured |= SERIAL_EVENT_RX_OVERRUN_ERROR; + } + UART_CB.rx_asynch_handler(); + } + } +#endif // DEVICE_SERIAL_ASYNCH +} + +void serial_init(serial_t *obj, PinName tx, PinName rx) { + UART_CB.pseltxd = + (tx == NC) ? NRF_UART_PSEL_DISCONNECTED : (uint32_t)tx; + UART_CB.pselrxd = + (rx == NC) ? NRF_UART_PSEL_DISCONNECTED : (uint32_t)rx; + if (UART_CB.pseltxd != NRF_UART_PSEL_DISCONNECTED) { + nrf_gpio_pin_set(UART_CB.pseltxd); + nrf_gpio_cfg_output(UART_CB.pseltxd); + } + if (UART_CB.pselrxd != NRF_UART_PSEL_DISCONNECTED) { + nrf_gpio_cfg_input(UART_CB.pselrxd, NRF_GPIO_PIN_NOPULL); + } + + if (UART_CB.initialized) { + // For already initialized peripheral it is sufficient to reconfigure + // RX/TX pins only. + + // Ensure that there is no unfinished TX transfer. + while (!serial_writable(obj)) { + } + // UART pins can be configured only when the peripheral is disabled. + nrf_uart_disable(UART_INSTANCE); + nrf_uart_txrx_pins_set(UART_INSTANCE, UART_CB.pseltxd, UART_CB.pselrxd); + nrf_uart_enable(UART_INSTANCE); + } + else { + UART_CB.baudrate = UART_DEFAULT_BAUDRATE; + UART_CB.parity = UART_DEFAULT_PARITY; + UART_CB.hwfc = UART_DEFAULT_HWFC; + UART_CB.pselcts = UART_DEFAULT_CTS; + UART_CB.pselrts = UART_DEFAULT_RTS; + + nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_RXDRDY); + nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_TXDRDY); + nrf_uart_task_trigger(UART_INSTANCE, NRF_UART_TASK_STARTRX); + nrf_uart_task_trigger(UART_INSTANCE, NRF_UART_TASK_STARTTX); + + nrf_uart_int_disable(UART_INSTANCE, NRF_UART_INT_MASK_RXDRDY | + NRF_UART_INT_MASK_TXDRDY); + #if DEVICE_SERIAL_ASYNCH + nrf_uart_int_enable(UART_INSTANCE, NRF_UART_INT_MASK_ERROR); + #endif + nrf_drv_common_irq_enable(UART_IRQn, APP_IRQ_PRIORITY_LOW); + + // TX interrupt needs to be signaled when transmitter buffer is empty, + // so a dummy transmission is needed to get the TXDRDY event initially + // set. + nrf_uart_configure(UART_INSTANCE, + NRF_UART_PARITY_EXCLUDED, NRF_UART_HWFC_DISABLED); + // Use maximum baud rate, so this dummy transmission takes as little + // time as possible. + nrf_uart_baudrate_set(UART_INSTANCE, NRF_UART_BAUDRATE_1000000); + // Perform it with disconnected TX pin, so nothing actually comes out + // of the device. + nrf_uart_txrx_pins_disconnect(UART_INSTANCE); + nrf_uart_hwfc_pins_disconnect(UART_INSTANCE); + nrf_uart_enable(UART_INSTANCE); + nrf_uart_txd_set(UART_INSTANCE, 0); + while (!nrf_uart_event_check(UART_INSTANCE, NRF_UART_EVENT_TXDRDY)) { + } + nrf_uart_disable(UART_INSTANCE); + + // Now everything is prepared to set the default configuration and + // connect the peripheral to actual pins. + nrf_uart_txrx_pins_set(UART_INSTANCE, UART_CB.pseltxd, UART_CB.pselrxd); + nrf_uart_baudrate_set(UART_INSTANCE, UART_CB.baudrate); + nrf_uart_configure(UART_INSTANCE, UART_CB.parity, UART_CB.hwfc); + if (UART_CB.hwfc == NRF_UART_HWFC_ENABLED) { + serial_set_flow_control(obj, FlowControlRTSCTS, + (PinName) UART_CB.pselrts, (PinName) UART_CB.pselcts); + } + nrf_uart_enable(UART_INSTANCE); + + UART_CB.initialized = true; + } + + if (tx == STDIO_UART_TX && rx == STDIO_UART_RX) { + stdio_uart_inited = 1; + memcpy(&stdio_uart, obj, sizeof(serial_t)); + } + else { + stdio_uart_inited = 0; + } +} + +void serial_free(serial_t *obj) +{ + (void)obj; + + if (UART_CB.initialized) { + nrf_uart_disable(UART_INSTANCE); + nrf_uart_int_disable(UART_INSTANCE, NRF_UART_INT_MASK_RXDRDY | + NRF_UART_INT_MASK_TXDRDY | + NRF_UART_INT_MASK_ERROR); + nrf_drv_common_irq_disable(UART_IRQn); + UART_CB.initialized = false; + + // There is only one UART instance, thus at this point the stdio UART + // can no longer be initialized. + stdio_uart_inited = 0; + } +} + +void serial_baud(serial_t *obj, int baudrate) +{ + // nrf_uart_baudrate_set() is not used here (registers are accessed + // directly) to make it possible to set special baud rates like 56000 + // or 31250. + + static uint32_t const acceptedSpeeds[][2] = { + { 1200, UART_BAUDRATE_BAUDRATE_Baud1200 }, + { 2400, UART_BAUDRATE_BAUDRATE_Baud2400 }, + { 4800, UART_BAUDRATE_BAUDRATE_Baud4800 }, + { 9600, UART_BAUDRATE_BAUDRATE_Baud9600 }, + { 14400, UART_BAUDRATE_BAUDRATE_Baud14400 }, + { 19200, UART_BAUDRATE_BAUDRATE_Baud19200 }, + { 28800, UART_BAUDRATE_BAUDRATE_Baud28800 }, + { 31250, (0x00800000UL) /* 31250 baud */ }, + { 38400, UART_BAUDRATE_BAUDRATE_Baud38400 }, + { 56000, (0x00E51000UL) /* 56000 baud */ }, + { 57600, UART_BAUDRATE_BAUDRATE_Baud57600 }, + { 76800, UART_BAUDRATE_BAUDRATE_Baud76800 }, + { 115200, UART_BAUDRATE_BAUDRATE_Baud115200 }, + { 230400, UART_BAUDRATE_BAUDRATE_Baud230400 }, + { 250000, UART_BAUDRATE_BAUDRATE_Baud250000 }, + { 460800, UART_BAUDRATE_BAUDRATE_Baud460800 }, + { 921600, UART_BAUDRATE_BAUDRATE_Baud921600 }, + { 1000000, UART_BAUDRATE_BAUDRATE_Baud1M } + }; + + if (baudrate <= 1200) { + UART_INSTANCE->BAUDRATE = UART_BAUDRATE_BAUDRATE_Baud1200; + return; + } + + int const item_cnt = sizeof(acceptedSpeeds)/sizeof(acceptedSpeeds[0]); + for (int i = 1; i < item_cnt; i++) { + if ((uint32_t)baudrate < acceptedSpeeds[i][0]) { + UART_INSTANCE->BAUDRATE = acceptedSpeeds[i - 1][1]; + return; + } + } + + UART_INSTANCE->BAUDRATE = UART_BAUDRATE_BAUDRATE_Baud1M; +} + +void serial_format(serial_t *obj, + int data_bits, SerialParity parity, int stop_bits) +{ + (void)obj; + + if (data_bits != 8) { + error("UART supports only 8 data bits.\r\n"); + } + if (stop_bits != 1) { + error("UART supports only 1 stop bits.\r\n"); + } + if (parity == ParityNone) { + UART_CB.parity = NRF_UART_PARITY_EXCLUDED; + } else if (parity == ParityEven) { + UART_CB.parity = NRF_UART_PARITY_INCLUDED; + } else { + error("UART supports only even parity.\r\n"); + } + + // Reconfigure UART peripheral. + nrf_uart_configure(UART_INSTANCE, UART_CB.parity, UART_CB.hwfc); +} + +void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) +{ + (void)obj; + UART_CB.irq_handler = handler; + UART_CB.irq_context = id; +} + +void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) +{ + (void)obj; + if (enable) { + switch (irq) { + case RxIrq: + #if DEVICE_SERIAL_ASYNCH + UART_CB.irq_enabled |= UART_IRQ_RX; + #endif + nrf_uart_int_enable(UART_INSTANCE, NRF_UART_INT_MASK_RXDRDY); + break; + + case TxIrq: + #if DEVICE_SERIAL_ASYNCH + UART_CB.irq_enabled |= UART_IRQ_TX; + #endif + nrf_uart_int_enable(UART_INSTANCE, NRF_UART_INT_MASK_TXDRDY); + break; + } + } else { + switch (irq) { + case RxIrq: + #if DEVICE_SERIAL_ASYNCH + UART_CB.irq_enabled &= ~UART_IRQ_RX; + if (!UART_CB.rx_active) + #endif + { + nrf_uart_int_disable(UART_INSTANCE, + NRF_UART_INT_MASK_RXDRDY); + } + break; + + case TxIrq: + #if DEVICE_SERIAL_ASYNCH + UART_CB.irq_enabled &= ~UART_IRQ_TX; + if (!UART_CB.tx_active) + #endif + { + nrf_uart_int_disable(UART_INSTANCE, + NRF_UART_INT_MASK_TXDRDY); + } + break; + } + } +} + +int serial_getc(serial_t *obj) +{ + while (!serial_readable(obj)) { + } + + nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_RXDRDY); + return nrf_uart_rxd_get(UART_INSTANCE); +} + +void serial_putc(serial_t *obj, int c) +{ + while (!serial_writable(obj)) { + } + + nrf_uart_event_clear(UART_INSTANCE, NRF_UART_EVENT_TXDRDY); + nrf_uart_txd_set(UART_INSTANCE, (uint8_t)c); +} + +int serial_readable(serial_t *obj) +{ + (void)obj; +#if DEVICE_SERIAL_ASYNCH + if (UART_CB.rx_active) { + return 0; + } +#endif + return (nrf_uart_event_check(UART_INSTANCE, NRF_UART_EVENT_RXDRDY)); +} + +int serial_writable(serial_t *obj) +{ + (void)obj; +#if DEVICE_SERIAL_ASYNCH + if (UART_CB.tx_active) { + return 0; + } +#endif + return (nrf_uart_event_check(UART_INSTANCE, NRF_UART_EVENT_TXDRDY)); +} + +void serial_break_set(serial_t *obj) +{ + (void)obj; + nrf_uart_task_trigger(UART_INSTANCE, NRF_UART_TASK_SUSPEND); + nrf_uart_txrx_pins_disconnect(UART_INSTANCE); + nrf_gpio_pin_clear(UART_CB.pseltxd); +} + +void serial_break_clear(serial_t *obj) +{ + (void)obj; + nrf_gpio_pin_set(UART_CB.pseltxd); + nrf_uart_txrx_pins_set(UART_INSTANCE, UART_CB.pseltxd, UART_CB.pselrxd); + nrf_uart_task_trigger(UART_INSTANCE, NRF_UART_TASK_STARTRX); + nrf_uart_task_trigger(UART_INSTANCE, NRF_UART_TASK_STARTTX); +} + +void serial_set_flow_control(serial_t *obj, FlowControl type, + PinName rxflow, PinName txflow) +{ + (void)obj; + + UART_CB.pselrts = + (rxflow == NC) ? NRF_UART_PSEL_DISCONNECTED : (uint32_t)rxflow; + UART_CB.pselcts = + (txflow == NC) ? NRF_UART_PSEL_DISCONNECTED : (uint32_t)txflow; + + if (UART_CB.pselrts != NRF_UART_PSEL_DISCONNECTED) { + nrf_gpio_pin_set(UART_CB.pselrts); + nrf_gpio_cfg_output(UART_CB.pselrts); + } + if (UART_CB.pselcts != NRF_UART_PSEL_DISCONNECTED) { + nrf_gpio_cfg_input(UART_CB.pselcts, NRF_GPIO_PIN_NOPULL); + } + nrf_uart_disable(UART_INSTANCE); + nrf_uart_hwfc_pins_set(UART_INSTANCE, UART_CB.pselrts, UART_CB.pselcts); + nrf_uart_enable(UART_INSTANCE); +} + +void serial_clear(serial_t *obj) { + (void)obj; +} + +#if DEVICE_SERIAL_ASYNCH + +int serial_tx_asynch(serial_t *obj, const void *tx, size_t tx_length, + uint8_t tx_width, uint32_t handler, uint32_t event, + DMAUsage hint) +{ + (void)obj; + (void)tx_width; + (void)hint; + if (UART_CB.tx_active || !tx_length) { + return 0; + } + + UART_CB.tx_buffer = tx; + UART_CB.tx_length = tx_length; + UART_CB.tx_pos = 0; + UART_CB.tx_asynch_handler = (void(*)())handler; + UART_CB.events_wanted &= ~SERIAL_EVENT_TX_ALL; + UART_CB.events_wanted |= event; + + UART_CB.tx_active = true; + nrf_uart_int_enable(UART_INSTANCE, NRF_UART_INT_MASK_TXDRDY); + + return 0; +} + +void serial_rx_asynch(serial_t *obj, void *rx, size_t rx_length, + uint8_t rx_width, uint32_t handler, uint32_t event, + uint8_t char_match, DMAUsage hint) +{ + (void)obj; + (void)rx_width; + (void)hint; + if (UART_CB.rx_active || !rx_length) { + return; + } + + UART_CB.rx_buffer = rx; + UART_CB.rx_length = rx_length; + UART_CB.rx_pos = 0; + UART_CB.rx_asynch_handler = (void(*)())handler; + UART_CB.events_wanted &= ~SERIAL_EVENT_RX_ALL; + UART_CB.events_wanted |= event; + UART_CB.char_match = char_match; + + UART_CB.rx_active = true; + nrf_uart_int_enable(UART_INSTANCE, NRF_UART_INT_MASK_RXDRDY); +} + +uint8_t serial_tx_active(serial_t *obj) +{ + (void)obj; + return UART_CB.tx_active; +} + +uint8_t serial_rx_active(serial_t *obj) +{ + (void)obj; + return UART_CB.rx_active; +} + +int serial_irq_handler_asynch(serial_t *obj) +{ + (void)obj; + uint32_t events_to_report = UART_CB.events_wanted & UART_CB.events_occured; + UART_CB.events_occured &= (~events_to_report); + return events_to_report; +} + +void serial_tx_abort_asynch(serial_t *obj) +{ + (void)obj; + end_asynch_tx(); + UART_CB.tx_asynch_handler = NULL; +} + +void serial_rx_abort_asynch(serial_t *obj) +{ + (void)obj; + end_asynch_rx(); + UART_CB.rx_asynch_handler = NULL; +} + +#endif // DEVICE_SERIAL_ASYNCH + +#endif // DEVICE_SERIAL