bsp.h

移植到freescale 9s12系列单片机的uCOSII

/*
*********************************************************************************************************
*                                               uC/OS-II
*                                         The Real-Time Kernel
*
*                                (c) Copyright 2004, Micrium, Weston, FL
*                                          All Rights Reserved
*
*
*                                      BOARD SUPPORT PACKAGE (BSP)
*                                         Freescale MC9S12
*
* File : BSP.H
* By   : Eric Shufro
*********************************************************************************************************
*/

#ifndef BSP_H
#define BSP_H


/*
*********************************************************************************************************
*                                           FUNCTION PROTOTYPES
*********************************************************************************************************
*/

static   void BSP_SetECT_Prescaler(INT8U prescaler);

void     BSP_Init (void);

void     LED_Off(INT8U led);
void     LED_On(INT8U led);
void     LED_Toggle(INT8U led);
void     BSP_DlyMS(INT8U ms);

INT32U   BSP_CPU_ClkFreq(void);

/*
*********************************************************************************************************
*                                         PROCESSOR SPECIFICS
*********************************************************************************************************
*/

/*-----------------------------------------------------*/
/*                   OS TICKER SETUP                   */
/*-----------------------------------------------------*/                    
								   
#define  OS_TICK_OC                  7        /* Output comp. channel # used to generate a tick Int (5-7)*/
                                              /* The NE64 has 4-7, but 4 is reserved for ECT based PWM   */


/*-----------------------------------------------------*/
/*                   SYSTEM CLOCK SETUP                */
/*-----------------------------------------------------*/                    

#define  OSCFREQ             25000000L		    /* Define the system crystal (oscillator) speed as 25MHZ   */
                                              /* Since this is the xtal on the Demo MC9S12NE64  EVB      */

#define  PLL_EN                      0        /* Select whether the PLL should be enabled. 0=No, 1=Yes   */
#define  PLL_CLK_MUL                 0        /* For MC9S12NE64, this value MUST never be > 0 when using */
                                              /* a crystal >= 25MHZ. 50MHZ is CPU's MAXIMUM SPD and the  */
                                              /* PLL multiplies (OSCFREQ * 2) when switched on.          */
#define  PLL_CLK_DIV                 0        /* Set the PLL Divider. Can be 0-15. Setting 0 has value=1 */
		                                              
#if PLL_EN == 0                              
#define  SYSCLK                OSCFREQ	      /* If PLL disabled, then SYSCLOCK = OSCCLK                 */ 
#define  BUS_CLK_FREQ         (SYSCLK  / 2)   /* BUSCLK = SYSCLK / 2                                     */
#else				    
#define  PLLCLK              ((OSCFREQ * 2) * (PLL_CLK_MUL + 1) / (PLL_CLK_DIV + 1))	     
#define  BUS_CLK_FREQ         (PLLCLK  / 2)   /* BUSCLK = PLLCLK / 2                                     */
#endif


/*
*********************************************************************************************************
*                                           ERROR CHECKING
*********************************************************************************************************
*/

#ifndef PLL_EN 
#error "PLL_EN must be defined in bsp.h. 0 = PLL Disabled, 1 = PLL Enabled"
#endif

#if PLL_EN == 1
#ifndef PLL_CLK_MUL
#error "PLL_CLK_MUL must be defined in bsp.h. if PLL_EN is 0 for 25mhz crystal"
#endif
#ifndef PLL_CLK_DIV
#error "PLL_CLK_DIV must be defined in bsp.h. if PLL_EN is 0 for 25mhz crystal"
#endif
#if     PLL_CLK_MUL > 63
#error "PLL_CLK_MUL must must have a value between 0 and 63"
#endif
#if     PLL_CLK_DIV > 15
#error "PLL_CLK_DIV must have a value between 0 and 15"
#endif
#endif

#ifndef OSCFREQ 
#error "OSCFREQ must be defined in bsp.h"
#endif

#ifndef BUS_CLK_FREQ  
#error "BUS_CLK_FREQ must be defined in bsp.h."
#endif

#if     BUS_CLK_FREQ > 25000000L 
#error "BUS_CLK_FREQ configuration error in bsp.h (WARNING: BUS_CLK_FREQ > 24 MHZ!)"
#endif

#if    (OS_TICK_OC < 5) && (OS_TICK_OC > 7)
#error "OS_TICK_OC is illegally defined in bsp.h. Expected valued between 4-7."
#endif





#endif