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141 lines
4.4 KiB
141 lines
4.4 KiB
/**************************************************************************** |
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* |
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* Copyright (C) 2012 PX4 Development Team. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name PX4 nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************/ |
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/** |
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* @file px4fmu_can.c |
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* |
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* Board-specific CAN functions. |
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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.h> |
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#include <arch/board/board.h> |
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#include "chip.h" |
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#include "up_arch.h" |
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#include "stm32.h" |
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#include "stm32_can.h" |
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#include "px4fmu_internal.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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#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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/* Debug ***************************************************************************/ |
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/* Non-standard debug that may be enabled just for testing CAN */ |
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#ifdef CONFIG_DEBUG_CAN |
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# define candbg dbg |
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# define canvdbg vdbg |
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# define canlldbg lldbg |
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# define canllvdbg llvdbg |
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#else |
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# define candbg(x...) |
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# define canvdbg(x...) |
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# define canlldbg(x...) |
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# define canllvdbg(x...) |
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#endif |
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/************************************************************************************ |
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* Private Functions |
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************************************************************************************/ |
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/************************************************************************************ |
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* Public Functions |
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************************************************************************************/ |
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/************************************************************************************ |
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* Name: can_devinit |
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* |
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* Description: |
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* All STM32 architectures must provide the following interface to work with |
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* examples/can. |
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* |
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************************************************************************************/ |
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int can_devinit(void) |
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{ |
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static bool initialized = false; |
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struct can_dev_s *can; |
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int ret; |
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/* Check if we have already initialized */ |
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if (!initialized) { |
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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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candbg("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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candbg("ERROR: can_register failed: %d\n", ret); |
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return ret; |
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} |
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/* Now we are initialized */ |
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initialized = true; |
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} |
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return OK; |
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}
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