nand2k_x_hw.c

这是ucfs文件系统源代码

/*
**********************************************************************
*                          Micrium, Inc.
*                      949 Crestview Circle
*                     Weston,  FL 33327-1848
*
*                            uC/FS
*
*             (c) Copyright 2001 - 2006, Micrium, Inc.
*                      All rights reserved.
*
***********************************************************************

----------------------------------------------------------------------
File        : NAND2k_X_HW.c
Purpose     : Hardware layer sample for the large page NAND flash  driver
----------------------------------------------------------------------
Known problems or limitations with current version
----------------------------------------------------------------------
None.
---------------------------END-OF-HEADER------------------------------
*/

/*********************************************************************
*
*             #include Section
*
**********************************************************************
*/
#include "FS_ConfDefaults.h"

#if FS_USE_NAND2K_DRIVER
#include "NAND_2k_X_HW.h"
#include "NAND.h"

/*********************************************************************
*
*        #define Macros
*
**********************************************************************
*/

/*********************************************************************
*
*        Macros for setting the pin to configure card
*
*    Please define here the sfr (special function register)
*    of your processor.
*
*
**********************************************************************
*/
/* Port direction registers */

#define SET_DATA2INPUT()     
#define SET_DATA2OUTPUT()    


/*********************************************************************
*
*        defines
*
**********************************************************************
*/
#define NAND_GET_DATA(Data)       
#define NAND_SET_DATA(Data)       

#define NAND_SET_ALE()            
#define NAND_CLR_ALE()            

#define NAND_SET_CE()             
#define NAND_CLR_CE()             

#define NAND_SET_CLE()            
#define NAND_CLR_CLE()            

#define NAND_SET_RE()             
#define NAND_CLR_RE()             

#define NAND_SET_WE()             
#define NAND_CLR_WE()             


#define NAND_GET_READY()

/*********************************************************************
*
*       Static code
*
**********************************************************************
*/

/*********************************************************************
*
*       Public code
*
**********************************************************************
*/


/*********************************************************************
*
*       FS_NAND_HW_X_SetData
*/
void FS_NAND_HW_X_SetData(FS_U8 Unit) {
  FS_USE_PARA(Unit);
  /* nCE low, CLE low, ALE low  */
  NAND_CLR_CE();
  NAND_CLR_CLE();
  NAND_CLR_ALE();
}


/*********************************************************************
*
*       FS_NAND_HW_X_SetCmd
*/
void FS_NAND_HW_X_SetCmd(FS_U8 Unit) {
  FS_USE_PARA(Unit);
  /* nCE low, CLE high, ALE low  */
  NAND_CLR_CE();
  NAND_SET_CLE();
  NAND_CLR_ALE();
}

/*********************************************************************
*
*       FS_NAND_HW_X_SetAddr
*/
void FS_NAND_HW_X_SetAddr(FS_U8 Unit) {
  FS_USE_PARA(Unit);
  /* nCE low, CLE low, ALE high */
  NAND_CLR_CE();
  NAND_CLR_CLE();
  NAND_SET_ALE();
}


/*********************************************************************
*
*       FS_NAND_HW_X_SetStandby
*/
void FS_NAND_HW_X_SetStandby(FS_U8 Unit) {
  /* nCE high, CLE low, ALE low  */
  NAND_SET_CE();
  NAND_CLR_CLE();
  NAND_CLR_ALE();
}

/*********************************************************************
*
*       FS_NAND_HW_X_Read
*/
void FS_NAND_HW_X_Read(FS_U8 Unit, FS_U8 * pBuffer, unsigned NumBytes) {
  SET_DATA2INPUT();
  do {
    NAND_CLR_RE();     /*  RE is active low */
    NAND_GET_DATA(*pBuffer);
    pBuffer++;
    NAND_SET_RE();    /* disable RE */
  } while (--NumBytes);
}


/*********************************************************************
*
*       FS_NAND_HW_X_Write
*/
void FS_NAND_HW_X_Write(FS_U8 Unit, const FS_U8 * pData, unsigned NumBytes) {
  SET_DATA2OUTPUT();
  do {
    NAND_CLR_WE();     /*  WE is active low */
    NAND_SET_DATA(*pData);
    pData++;
    NAND_SET_WE();    /* disable WE */
  } while (--NumBytes);
}

/*********************************************************************
*
*       FS_NAND_HW_X_IsWriteProtected
*/
int FS_NAND_HW_X_IsWriteProtected(FS_U8 Unit) {
  FS_USE_PARA(Unit);
  return 0;  /* Nand flash is not write protected*/
}

/*********************************************************************
*
*       FS_NAND_HW_X_IsBusy
*/
int FS_NAND_HW_X_IsBusy(FS_U8 Unit) {
/* If hardware does not support checking RDY/BSY,
 *  we check status by asking the card.
 */
#if FS_NAND2K_SUPPORT_BUSYLINE_CHECK == 0
  {
    FS_U8 Cmd;
    FS_U8 Busy;

    Cmd = NAND_CMD_READ_STATUS;
    FS_NAND_HW_X_SetCmd(Unit);
    FS_NAND_HW_X_Write(Unit, &Cmd, 1);
    FS_NAND_HW_X_SetData(Unit);
    FS_NAND_HW_X_Read(Unit, &Busy, 1);
    FS_NAND_HW_X_SetStandby(Unit);
    if (Busy & 0x40) {
      return 0;
    }
    return 1;
  }
#else
  /* Ready = high -> return 0
   * Busy  = low  -> return 1
   */
   ;
  return NAND_GET_READY() ? 0 : 1;
#endif
}
/*********************************************************************
*
*       FS_NAND_HW_X_BusyLedOn
*/
void FS_NAND_HW_X_BusyLedOn(FS_U8 Unit) {
}


/*********************************************************************
*
*       FS_NAND_HW_X_BusyLedOff
*/
void FS_NAND_HW_X_BusyLedOff(FS_U8 Unit) {
}

/*********************************************************************
*
*       FS_NAND_HW_X_Init
*/
void FS_NAND_HW_X_Init(FS_U8 Unit) {
}

/*********************************************************************
*
*             FS_NAND_HW_X_WaitTimer
*/

void FS_NAND_HW_X_Delayus(unsigned  Period) {

}

#else
void NAND_2K_HW_c(void);
void NAND_2K_HW_c(void) {}
#endif

/**************************** end of file ***************************/