93 lines
2.7 KiB
C
93 lines
2.7 KiB
C
/****************************************************************************
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* boards/xtensa/esp32/esp32-devkitc/src/esp32_twai.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 "esp32_twai.h"
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#include "esp32-devkitc.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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#define TWAI_PORT0 0
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: esp32_twai_setup
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*
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* Description:
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* Initialize TWAI and register the TWAI device
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*
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****************************************************************************/
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int esp32_twai_setup(void)
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{
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#ifdef CONFIG_ESP32_TWAI0
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struct can_dev_s *twai;
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int ret;
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/* Call esp32_twaiinitialize() to get an instance of the TWAI0
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* interface
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* */
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twai = esp32_twaiinitialize(TWAI_PORT0);
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if (twai == NULL)
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{
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canerr("ERROR: Failed to get TWAI0 interface\n");
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return -ENODEV;
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}
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/* Register the TWAI0 driver at "/dev/can0" */
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ret = can_register("/dev/can0", twai);
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if (ret < 0)
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{
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canerr("ERROR: TWAI1 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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