101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/****************************************************************************
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* boards/arm/stm32/stm3220g-eval/src/stm32_can.c
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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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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/can/can.h>
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#include <arch/board/board.h>
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#include "chip.h"
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#include "arm_internal.h"
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#include "stm32.h"
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#include "stm32_can.h"
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#include "stm3220g-eval.h"
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#ifdef CONFIG_CAN
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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#if defined(CONFIG_STM32_CAN1) && defined(CONFIG_STM32_CAN2)
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# warning "Both CAN1 and CAN2 are enabled. Assuming only CAN1."
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# undef CONFIG_STM32_CAN2
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#endif
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#ifdef CONFIG_STM32_CAN1
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# define CAN_PORT 1
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#else
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# define CAN_PORT 2
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: stm32_can_setup
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*
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* Description:
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* Initialize CAN and register the CAN device
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*
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****************************************************************************/
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int stm32_can_setup(void)
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{
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#if defined(CONFIG_STM32_CAN1) || defined(CONFIG_STM32_CAN2)
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struct can_dev_s *can;
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int ret;
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/* Call stm32_caninitialize() to get an instance of the CAN interface */
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can = stm32_caninitialize(CAN_PORT);
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if (can == NULL)
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{
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canerr("ERROR: Failed to get CAN interface\n");
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return -ENODEV;
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}
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/* Register the CAN driver at "/dev/can0" */
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ret = can_register("/dev/can0", can);
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if (ret < 0)
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{
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canerr("ERROR: can_register failed: %d\n", ret);
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return ret;
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}
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return OK;
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#else
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return -ENODEV;
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#endif
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}
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#endif /* CONFIG_CAN */
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