126 lines
3.9 KiB
C
126 lines
3.9 KiB
C
/****************************************************************************
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* arch/arm/src/stm32l4/stm32l4_can.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __ARCH_ARM_SRC_STM32L4_STM32L4_CAN_H
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#define __ARCH_ARM_SRC_STM32L4_STM32L4_CAN_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include "chip.h"
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#include "hardware/stm32l4_can.h"
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#include <nuttx/can/can.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* Up to 1 CAN interfaces are supported */
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#if STM32L4_NCAN < 1
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# undef CONFIG_STM32L4_CAN1
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#endif
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#if defined(CONFIG_CAN) && defined(CONFIG_STM32L4_CAN1)
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/* CAN BAUD */
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#if defined(CONFIG_STM32L4_CAN1) && !defined(CONFIG_STM32L4_CAN1_BAUD)
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# error "CONFIG_STM32L4_CAN1_BAUD is not defined"
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#endif
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/* User-defined TSEG1 and TSEG2 settings may be used.
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*
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* CONFIG_STM32L4_CAN_TSEG1 = the number of CAN time quanta in segment 1
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* CONFIG_STM32L4_CAN_TSEG2 = the number of CAN time quanta in segment 2
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* CAN_BIT_QUANTA = The number of CAN time quanta in on bit time
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*/
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#ifndef CONFIG_STM32L4_CAN_TSEG1
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# define CONFIG_STM32L4_CAN_TSEG1 6
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#endif
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#if CONFIG_STM32L4_CAN_TSEG1 < 1 || CONFIG_STM32L4_CAN_TSEG1 > CAN_BTR_TSEG1_MAX
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# error "CONFIG_STM32L4_CAN_TSEG1 is out of range"
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#endif
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#ifndef CONFIG_STM32L4_CAN_TSEG2
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# define CONFIG_STM32L4_CAN_TSEG2 7
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#endif
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#if CONFIG_STM32L4_CAN_TSEG2 < 1 || CONFIG_STM32L4_CAN_TSEG2 > CAN_BTR_TSEG2_MAX
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# error "CONFIG_STM32L4_CAN_TSEG2 is out of range"
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#endif
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/****************************************************************************
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* Public Types
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****************************************************************************/
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#ifndef __ASSEMBLY__
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Public Functions Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: stm32l4can_initialize
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*
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* Description:
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* Initialize the selected CAN port
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*
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* Input Parameters:
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* Port number (for hardware that has multiple CAN interfaces)
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*
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* Returned Value:
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* Valid CAN device structure reference on success; a NULL on failure
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*
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****************************************************************************/
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struct can_dev_s;
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FAR struct can_dev_s *stm32l4can_initialize(int port);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* CONFIG_CAN && CONFIG_STM32L4_CAN1 */
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#endif /* __ARCH_ARM_SRC_STM32L4_STM32L4_CAN_H */
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