146 lines
4.9 KiB
C
146 lines
4.9 KiB
C
/************************************************************************************
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* arch/arm/src/stm32/stm32_can.h
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*
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* Copyright (C) 2009, 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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 NuttX 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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#ifndef __ARCH_ARM_SRC_STM32_STM32_CAN_H
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#define __ARCH_ARM_SRC_STM32_STM32_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 "chip/stm32_can.h"
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#include <nuttx/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 2 CAN interfaces are supported */
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#if STM32_NCAN < 2
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# undef CONFIG_STM32_CAN2
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#endif
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#if STM32_NCAN < 1
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# undef CONFIG_STM32_CAN1
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#endif
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#if defined(CONFIG_CAN) && (defined(CONFIG_STM32_CAN1) || defined(CONFIG_STM32_CAN2))
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/* CAN BAUD */
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#if defined(CONFIG_STM32_CAN1) && !defined(CONFIG_CAN1_BAUD)
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# error "CONFIG_CAN1_BAUD is not defined"
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#endif
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#if defined(CONFIG_STM32_CAN2) && !defined(CONFIG_CAN2_BAUD)
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# error "CONFIG_CAN2_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_CAN_TSEG1 = the number of CAN time quanta in segment 1
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* CONFIG_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_CAN_TSEG1
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# define CONFIG_CAN_TSEG1 6
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#endif
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#if CONFIG_CAN_TSEG1 < 1 || CONFIG_CAN_TSEG1 > CAN_BTR_TSEG1_MAX
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# errror "CONFIG_CAN_TSEG1 is out of range"
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#endif
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#ifndef CONFIG_CAN_TSEG2
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# define CONFIG_CAN_TSEG2 7
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#endif
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#if CONFIG_CAN_TSEG2 < 1 || CONFIG_CAN_TSEG2 > CAN_BTR_TSEG2_MAX
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# errror "CONFIG_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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#else
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#define EXTERN extern
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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_caninitialize
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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 Parameter:
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* Port number (for hardware that has mutiple CAN interfaces)
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*
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* Returned Value:
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* Valid CAN device structure reference on succcess; a NULL on failure
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*
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****************************************************************************/
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struct can_dev_s;
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EXTERN FAR struct can_dev_s *stm32_caninitialize(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_STM32_CAN1 || CONFIG_STM32_CAN2) */
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#endif /* __ARCH_ARM_SRC_STM32_STM32_CAN_H */
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