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258 lines
6.4 KiB
C
258 lines
6.4 KiB
C
4 years ago
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/*
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ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file hal_can_lld.c
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* @brief PLATFORM CAN subsystem low level driver source.
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*
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* @addtogroup CAN
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* @{
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*/
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#include "hal.h"
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#if (HAL_USE_CAN == TRUE) || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/**
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* @brief CAN1 driver identifier.
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*/
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#if (PLATFORM_CAN_USE_CAN1 == TRUE) || defined(__DOXYGEN__)
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CANDriver CAND1;
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#endif
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/*===========================================================================*/
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/* Driver local variables and types. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver interrupt handlers. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief Low level CAN driver initialization.
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*
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* @notapi
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*/
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void can_lld_init(void) {
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#if PLATFORM_CAN_USE_CAN1 == TRUE
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/* Driver initialization.*/
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canObjectInit(&CAND1);
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#endif
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}
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/**
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* @brief Configures and activates the CAN peripheral.
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*
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* @param[in] canp pointer to the @p CANDriver object
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*
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* @notapi
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*/
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void can_lld_start(CANDriver *canp) {
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if (canp->state == CAN_STOP) {
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/* Enables the peripheral.*/
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#if PLATFORM_CAN_USE_CAN1 == TRUE
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if (&CAND1 == canp) {
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}
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#endif
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}
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/* Configures the peripheral.*/
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}
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/**
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* @brief Deactivates the CAN peripheral.
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*
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* @param[in] canp pointer to the @p CANDriver object
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*
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* @notapi
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*/
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void can_lld_stop(CANDriver *canp) {
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if (canp->state == CAN_READY) {
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/* Resets the peripheral.*/
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/* Disables the peripheral.*/
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#if PLATFORM_CAN_USE_CAN1 == TRUE
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if (&CAND1 == canp) {
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}
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#endif
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}
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}
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/**
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* @brief Determines whether a frame can be transmitted.
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*
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* @param[in] canp pointer to the @p CANDriver object
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* @param[in] mailbox mailbox number, @p CAN_ANY_MAILBOX for any mailbox
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*
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* @return The queue space availability.
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* @retval false no space in the transmit queue.
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* @retval true transmit slot available.
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*
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* @notapi
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*/
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bool can_lld_is_tx_empty(CANDriver *canp, canmbx_t mailbox) {
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(void)canp;
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switch (mailbox) {
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case CAN_ANY_MAILBOX:
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return false;
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case 1:
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return false;
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case 2:
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return false;
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case 3:
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return false;
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default:
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return false;
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}
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}
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/**
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* @brief Inserts a frame into the transmit queue.
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*
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* @param[in] canp pointer to the @p CANDriver object
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* @param[in] ctfp pointer to the CAN frame to be transmitted
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* @param[in] mailbox mailbox number, @p CAN_ANY_MAILBOX for any mailbox
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*
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* @notapi
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*/
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void can_lld_transmit(CANDriver *canp,
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canmbx_t mailbox,
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const CANTxFrame *ctfp) {
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(void)canp;
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(void)mailbox;
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(void)ctfp;
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}
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/**
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* @brief Determines whether a frame has been received.
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*
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* @param[in] canp pointer to the @p CANDriver object
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* @param[in] mailbox mailbox number, @p CAN_ANY_MAILBOX for any mailbox
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*
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* @return The queue space availability.
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* @retval false no space in the transmit queue.
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* @retval true transmit slot available.
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*
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* @notapi
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*/
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bool can_lld_is_rx_nonempty(CANDriver *canp, canmbx_t mailbox) {
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(void)canp;
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(void)mailbox;
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switch (mailbox) {
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case CAN_ANY_MAILBOX:
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return false;
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case 1:
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return false;
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case 2:
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return false;
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default:
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return false;
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}
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}
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/**
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* @brief Receives a frame from the input queue.
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*
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* @param[in] canp pointer to the @p CANDriver object
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* @param[in] mailbox mailbox number, @p CAN_ANY_MAILBOX for any mailbox
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* @param[out] crfp pointer to the buffer where the CAN frame is copied
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*
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* @notapi
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*/
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void can_lld_receive(CANDriver *canp,
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canmbx_t mailbox,
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CANRxFrame *crfp) {
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(void)canp;
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(void)mailbox;
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(void)crfp;
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}
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/**
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* @brief Tries to abort an ongoing transmission.
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*
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* @param[in] canp pointer to the @p CANDriver object
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* @param[in] mailbox mailbox number
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*
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* @notapi
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*/
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void can_lld_abort(CANDriver *canp,
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canmbx_t mailbox) {
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(void)canp;
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(void)mailbox;
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}
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#if (CAN_USE_SLEEP_MODE == TRUE) || defined(__DOXYGEN__)
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/**
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* @brief Enters the sleep mode.
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*
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* @param[in] canp pointer to the @p CANDriver object
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*
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* @notapi
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*/
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void can_lld_sleep(CANDriver *canp) {
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(void)canp;
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}
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/**
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* @brief Enforces leaving the sleep mode.
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*
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* @param[in] canp pointer to the @p CANDriver object
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*
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* @notapi
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*/
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void can_lld_wakeup(CANDriver *canp) {
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(void)canp;
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}
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#endif /* CAN_USE_SLEEP_MOD == TRUEE */
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#endif /* HAL_USE_CAN == TRUE */
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/** @} */
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