master.cfg

飞思卡尔车身控制技术研讨会资料 里面有LIN的主从节点源程序

#ifndef LINCFG_H
#define LINCFG_H

/******************************************************************************
*                                                                     
*       Copyright (C) 2005 Freescale Semiconductor, Inc.              
*       All Rights Reserved								              
*														              
* Filename:     master.cfg                
*														              
* Revision:      										              
*														              
* Functions:    LIN Driver static configuration file for LINS08 LINKits Master sample
*         
* Description:	Example file that can be modified by the user.
*
* Notes:        
*
******************************************************************************/

/* CPU bus freq  = 8 MHz */
/* SCI (LIN) freq = 9.6 Kbit */

/*
    This definition set the number of user-defined timer clocks
    (LIN_IdleClock service calls), recognized as "no-bus-activity" 
    condition.
    This number shall not be greater than 0xFFFF.
*/
#define LIN_IDLETIMEOUT         100u

/*
	This definition configures the LIN bus baud rate. 
	This value shall be set according to target MCU 
	SCI register usage.
	LIN_BAUDRATE = BUSCLK / ( Baud Rate*16)
	52 = 8 MHz /(9600 * 16)
*/
#define LIN_BAUDRATE			52u		 /*(8MHz bus clock = SCI Modul clock; 9600 baudrate -> 1/9600 = Tbit = 104us*/


/* 
This definition configures the timer clock source.
Only for Master node.
Possible values are:
LIN_TIMERCLK_BUSCLK     Bus rate clock
LIN_TIMERCLK_XCLK       Fixed system clock
LIN_TIMERCLK_TPMxCLK    external source
*/
#define LIN_TIMERCLK_BUSCLK     0x08        /* do not change */
#define LIN_TIMERCLK_XCLK       0x10        /* do not change */
#define LIN_TIMERCLK_TPMxCLK    0x18        /* do not change */

#define LIN_TIMERCLK	 LIN_TIMERCLK_BUSCLK

/* 
This definition configures the timer clock rate.
Only for Master node.
This value shall be set according to target MCU 
timer prescaler register usage.
*/
#define LIN_TIMERPRESCALER		3u	  /*divide bus clock by 8 - timer clock 1MHz -> 1us*/


/*
	This definition set the length of one bit transmission 
	period on the target MCU.
    Only for Master node.
	Due to 16-bit counters on target MCU this value 
	shall not be greater than 0xFFFF.
    For correct timeouts computation this value
    shall have qualificator 'l'.
*/
#define LIN_BITTIME				104ul   /*LIN_BITTIME *timer clock = Tbit -> 52 * 1us = 52us */

/* 
   This definition configures the time of the wake up  delimiter.
   The LIN specification v.1.2 specify this time min 4 Tbit and max 64 Tbit */

#define LIN_TO_WAKEUPDEL 10

#endif /* !define (LINCFG_H) */