247 lines
7.4 KiB
C
247 lines
7.4 KiB
C
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/**********************************************************************
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* $Id$ lpc43xx_can.h 2011-06-02
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*//**
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* @file lpc43xx_can.h
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* @brief Contains all macro definitions and function prototypes
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* support for CAN firmware library on lpc43xx
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* @version 1.0
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* @date 02. June. 2011
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* @author NXP MCU SW Application Team
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*
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* Copyright(C) 2011, NXP Semiconductor
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* All rights reserved.
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*
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***********************************************************************
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* Software that is described herein is for illustrative purposes only
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* which provides customers with programming information regarding the
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* products. This software is supplied "AS IS" without any warranties.
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* NXP Semiconductors assumes no responsibility or liability for the
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* use of the software, conveys no license or title under any patent,
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* copyright, or mask work right to the product. NXP Semiconductors
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* reserves the right to make changes in the software without
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* notification. NXP Semiconductors also make no representation or
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* warranty that such application will be suitable for the specified
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* use without further testing or modification.
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* Permission to use, copy, modify, and distribute this software and its
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* documentation is hereby granted, under NXP Semiconductors<EFBFBD>
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* relevant copyright in the software, without fee, provided that it
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* is used in conjunction with NXP Semiconductors microcontrollers. This
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* copyright, permission, and disclaimer notice must appear in all copies of
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* this code.
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**********************************************************************/
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/* Peripheral group ----------------------------------------------------------- */
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/** @defgroup C_CAN C_CAN (Controller Area Network)
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* @ingroup LPC4300CMSIS_FwLib_Drivers
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* @{
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*/
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#ifndef __lpc43xx_CAN_H
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#define __lpc43xx_CAN_H
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/* Includes ------------------------------------------------------------------- */
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#include "LPC43xx.h"
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#include "lpc_types.h"
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/* Public Macros -------------------------------------------------------------- */
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/** @defgroup C_CAN_Public_Macros C_CAN Public Macros
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* @{
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*/
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/** In BASIC_MODE IF1 registers are used directly as TX buffer, IF2 registers are used as RX buffer.
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* If not BASIC_MODE use message objects and IF registers to communicate with message buffers
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*/
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#define BASIC_MODE 0
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/** In Silent Mode, the CAN controller is able to receive valid data frames and valid remote
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* frames, but it sends only recessive bits on the CAN bus, and it cannot start a transmission
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*/
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#define SILENT_MODE 0
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/** In Loop-back Mode, the CAN Core treats its own transmitted messages as received messages
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* and stores them (if they pass acceptance filtering) into a Receive Buffer.
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*/
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#define LOOPBACK_MODE 0
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/** Enables receiving remote frame requests */
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#define REMOTE_ENABLE 1
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/**
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* @}
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*/
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/* Private Macros -------------------------------------------------------------- */
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/** @defgroup C_CAN_Private_Macros C_CAN Private Macros
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* @{
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*/
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/** MAX CAN message obj */
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#define CAN_MSG_OBJ_MAX 0x0020
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/** MAX data length */
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#define CAN_DLC_MAX 8
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/********************************************************************//**
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* BRP+1 = Fpclk/(CANBitRate * QUANTAValue)
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* QUANTAValue = 1 + (Tseg1+1) + (Tseg2+1)
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* QUANTA value varies based on the Fpclk and sample point
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* e.g. (1) sample point is 87.5%, Fpclk is 48Mhz
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* the QUANTA should be 16
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* (2) sample point is 90%, Fpclk is 12.5Mhz
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* the QUANTA should be 10
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* Fpclk = Fclk /APBDIV
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* or
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* BitRate = Fcclk/(APBDIV * (BRP+1) * ((Tseg1+1)+(Tseg2+1)+1))
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*/
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/*********************************************************************//**
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* @brief CAN Bit Timing Values definitions at 8Mhz
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**********************************************************************/
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/** Bitrate: 100K */
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#define CAN_BITRATE100K12MHZ 0x00004509
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/** Bitrate: 125K */
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#define CAN_BITRATE125K12MHZ 0x00004507
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/** Bitrate: 250K */
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#define CAN_BITRATE250K12MHZ 0x00004503
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/** Bitrate: 500K */
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#define CAN_BITRATE500K12MHZ 0x00004501
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/** Bitrate: 1000K */
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#define CAN_BITRATE1000K12MHZ 0x00004500
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/*********************************************************************//**
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* @brief CAN Bit Timing Values definitions at 16Mhz
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**********************************************************************/
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/** Bitrate: 100K */
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#define CAN_BITRATE100K16MHZ 0x00005809
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/** Bitrate: 125K */
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#define CAN_BITRATE125K16MHZ 0x00005807
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/** Bitrate: 250K */
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#define CAN_BITRATE250K16MHZ 0x00005803
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/** Bitrate: 500K */
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#define CAN_BITRATE500K16MHZ 0x00005801
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/*********************************************************************//**
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* @brief CAN Bit Timing Values definitions at 24Mhz
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**********************************************************************/
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/** Bitrate: 100K */
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#define CAN_BITRATE100K24MHZ 0x00007E09
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/** Bitrate: 125K */
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#define CAN_BITRATE125K24MHZ 0x0000450F
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/** Bitrate: 250K */
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#define CAN_BITRATE250K24MHZ 0x00004507
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/** Bitrate: 500K */
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#define CAN_BITRATE500K24MHZ 0x00004503
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/** Bitrate: 1000K */
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#define CAN_BITRATE1000K24MHZ 0x00004501
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/**
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* @}
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*/
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/* Public Types --------------------------------------------------------------- */
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/** @defgroup CAN_Public_Types CAN Public Types
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* @{
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*/
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/*********************************************************************//**
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* @brief CAN enumeration
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**********************************************************************/
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/**
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* @brief CAN interface register type definition
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*/
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typedef enum CCAN_IFREG
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{
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CMDREQ = 0, /**< Command request */
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CMDMSK = 1, /**< Command mask */
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MSK1 = 2, /**< Mask 1 */
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MSK2 = 3, /**< Mask 2 */
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ARB1 = 4, /**< Arbitration 1 */
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ARB2 = 5, /**< Arbitration 2 */
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MCTRL = 6, /**< Message control */
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DA1 = 7, /**< Data A1 */
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DA2 = 8, /**< Data A2 */
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DB1 = 9, /**< Data B1 */
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DB2 = 10 /**< Data B2 */
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}CCAN_IFREG_Type;
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/**
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* @brief CAN Clock division rate type definition
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*/
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typedef enum CCAN_CLKDIV
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{
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CLKDIV1 = 0,
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CLKDIV2 = 1,
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CLKDIV3 = 2,
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CLKDIV5 = 3,
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CLKDIV9 = 4,
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CLKDIV17 = 5,
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CLKDIV33 = 6,
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CLKDIV65 = 7
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}CCAN_CLKDIV_Type;
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/********************************************************************//**
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* @brief Data structure definition for a CAN message
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**********************************************************************/
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/**
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* @brief CAN message object structure
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*/
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typedef struct
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{
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uint32_t id; /**< ID of message, if bit 30 is set then this is extended frame */
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uint32_t dlc; /**< Message data length */
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uint8_t data[8]; /**< Message data */
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} message_object;
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/**
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* @brief CAN call-back function
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*/
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typedef void (*MSG_CB)(uint32_t msg_no);
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/**
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* @}
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*/
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/* Public Functions ----------------------------------------------------------- */
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/** @defgroup CAN_Public_Functions CAN Public Functions
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* @{
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*/
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void CAN_IRQHandler (void);
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void CAN_Init( uint32_t BitClk, CCAN_CLKDIV_Type ClkDiv , MSG_CB Tx_cb, MSG_CB Rx_cb);
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void CAN_ConfigureRxMessageObjects( void );
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void CAN_RxInt_MessageProcess( uint8_t MsgObjNo );
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void CAN_TxInt_MessageProcess( uint8_t MsgObjNo );
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void CAN_Send(uint8_t msg_no, uint32_t *msg_ptr );
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void CAN_Recv(uint8_t msg_no, uint32_t *msg_ptr, Bool RemoteEnable);
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void CAN_ReadMsg(uint32_t msg_no, message_object* buff);
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/**
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* @}
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*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* __lpc43xx_CAN_H */
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/**
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* @}
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*/
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/*****************************************************************************
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** End Of File
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******************************************************************************/
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