m54451evb.h

Freescale MCF5445evb 参考测试代码

/*! 
 * \file    m54451evb.h
 * \brief   Platform specific C defines
 * 
 * This file contains all platform specific routines necessary for 
 * hardware startup and useful platform dependent routines.
 *
 * \author  Michael Norman
 * \version $Revision: 1.1 $
 */

#ifndef __M54451EVB_H__
#define __M54451EVB_H__

/********************************************************************/

/* 
 * System Clock Settings
 */
#ifndef FREF
#define FREF            24000000
#endif
#ifndef FSYS
#define FSYS            240000000       /*!< Core clock freq (Hz) */
#endif
#define FSYS_KHZ        (FSYS/1000)     /*!< Core clock freq (KHz) */
#define FSYS_MHZ        (FSYS_KHZ/1000) /*!< Core clock freq (MHz) */
#define TSYS_NS         (1000/FSYS_MHZ) /*!< Core clock period (ns) */
#define FBUS            (FSYS/2)        /*!< Internal bus clock freq (Hz) */
#define FBUS_KHZ        (FSYS_KHZ/2)    /*!< Internal bus clock freq (KHz) */
#define FBUS_MHZ        (FSYS_MHZ/2)    /*!< Internal bus clock freq (MHz) */
#define TBUS_NS         (1000/FBUS_MHZ) /*!< Internal bus clock period (ns) */

/*
 * Serial Port Info
 */
#define TERM_PORT           0       /*!< UART channel used as terminal */
#define TERM_BAUD           115200  /*!< Default UART baud rate */

/*
 * Flash Info
 */
//TBD
#define ATMEL_FLASH_AT49BV040A      /*!< Flash device */
#define FLASH_MAX_ACCESS       90  /*!< Flash maximum access time */

/*
 * SDRAM Timing Parameters from DDR2 Specs
 */
#define SDRAM_CL    3               /*!< DDR2 CAS Latency */
#define SDRAM_AL    1               /*!< DDR2 Additive Latency */
#define SDRAM_TRCD  (15/TBUS_NS)    /*!< DDR2 RAS to CAS delay (ns) */
#define SDRAM_TRP   (15/TBUS_NS)    /*!< DDR2 Precharge commadn period (ns) */
#define SDRAM_TWR   (15/TBUS_NS)    /*!< DDR2 Write recovery time */
#define SDRAM_TRFC  105             /*!< DDR2 Refresh to Active interval (ns) */
#define SDRAM_TREFI 7800            /*!< DDR2 Average refresh interval (ns) */

/* 
 * SDRAM timing calculations
 */
#if (FSYS_KHZ == 240000)
#define SDRAM_SWT2RWP       5   /* SDRAM_CL + SDRAM_AL + SDRAM_TWR */
#define SDRAM_ACT2RW        1   /* SDRAM_TRCD */
#define SDRAM_PRE2ACT       1   /* SDRAM_TRP */
#define SDRAM_REF2ACT       8   /* SDRAM_TRFC/(TBUS_NS * 2) + 1 */
#define SDRAM_BWT2RWP       9   /* SDRAM_CL + SDRAM_AL + 8/2 + SDRAM_TWR */
#define SDRAM_REFCNT        15  /* SDRAM_TREFI/(TBUS_NS*64) - 1 */
#define SDRAM_WR            1   /* SDRAM_TWR */
#elif (FSYS_KHZ == 200000)
#define SDRAM_SWT2RWP       5   /* SDRAM_CL + SDRAM_AL + SDRAM_TWR */
#define SDRAM_ACT2RW        1   /* SDRAM_TRCD */
#define SDRAM_PRE2ACT       1   /* SDRAM_TRP */
#define SDRAM_REF2ACT       6   /* SDRAM_TRFC/(TBUS_NS * 2) + 1 */
#define SDRAM_BWT2RWP       9   /* SDRAM_CL + SDRAM_AL + 8/2 + SDRAM_TWR */
#define SDRAM_REFCNT        11  /* SDRAM_TREFI/(TBUS_NS*64) - 1 */
#define SDRAM_WR            1   /* SDRAM_TWR */
#elif (FSYS_KHZ == 160000)
#define SDRAM_SWT2RWP       5   /* SDRAM_CL + SDRAM_AL + SDRAM_TWR */
#define SDRAM_ACT2RW        1   /* SDRAM_TRCD */
#define SDRAM_PRE2ACT       1   /* SDRAM_TRP */
#define SDRAM_REF2ACT       5   /* SDRAM_TRFC/(TBUS_NS * 2) + 1 */
#define SDRAM_BWT2RWP       9   /* SDRAM_CL + SDRAM_AL + 8/2 + SDRAM_TWR */
#define SDRAM_REFCNT        10  /* SDRAM_TREFI/(TBUS_NS*64) - 1 */
#define SDRAM_WR            1   /* SDRAM_TWR */
#else
#error "What should I do?"
#endif

/*
 * Memory map definitions from linker command files
 */
extern uint8 __FLASH[];
extern uint8 __FLASH_SIZE[];
extern uint8 __SDRAM[];
extern uint8 __SDRAM_SIZE[];
extern uint8 __SRAM[];
extern uint8 __SRAM_SIZE[];

/*
 * Memory Map Info
 */
#define FLASH_ADDRESS       (uint32)__FLASH     
#define FLASH_SIZE          (uint32)__FLASH_SIZE
#define SDRAM_ADDRESS       (uint32)__SDRAM
#define SDRAM_SIZE          (uint32)__SDRAM_SIZE
#define SRAM_ADDRESS        (uint32)__SRAM
#define SRAM_SIZE           (uint32)__SRAM_SIZE

/*
 * Board specific function prototypes
 */
void platform_startup (void);
void platform_handle_interrupt (int);
void platform_enable_interrupts (void);
void platform_led_display (int);
void platform_gpio_config(int);

/********************************************************************/

#endif /* __M54451EVB_H__ */