rx2flash.c

mifarea卡程序mifarea卡程序mifarea卡程序

/* rx2flash.c */

//#include<reg51rd2.h>
#include"types.h"
#include"c51rx2.h"
#include"reg52.h"
#include"stimer.h"

#ifdef WATCHDOG
//#define CLRWDT
#endif

#define _pusha()  ;
#define _popa()   ;

#ifndef     _pusha
void _pusha(void);
void _popa(void);
#endif

/********************************************
* FlashFlex51 MCU SFR Memory Addresses
*********************************************/
sfr SFCF = 0xB1; /*SuperFlash Configuration*/
sfr SFCM = 0xB2; /*SuperFlash Command*/
sfr SFAL = 0xB3; /*SuperFlash Address Low*/
sfr SFAH = 0xB4; /*SuperFlash Address High*/
sfr SFDT = 0xB5; /*SuperFlash Data*/
sfr SFST = 0xB6; /*SuperFlash Status*/
/********************************************
* FlashFlex51 MCU IAP Commands
*********************************************/
#define SFCM_SE 0x0B; /*Sector-Erase IAP cmd*/
#define SFCM_VB 0x0C; /*Byte-Verify IAP cmd*/
#define SFCM_PB 0x0E; /*Byte-Program IAP cmd*/
/********************************************
* Global Variable Definition
*********************************************/
const unsigned short int BLK1_DST_ADDR = 0x1000;
/*SST89x564RD destination address (in the other on-chip flash memory block)
where data will be written to, which is above BSL code space.*/

const unsigned char SECT_SIZE = 0x80; /*number of bytes in a sector*/

// test if operation is ready
bool ready()
{
    unsigned long int TimeOut = 0;
    
    while (TimeOut < 100000)
    {
        if ((SFST&4) == 0)      /* Check if IAP is done */
        {                       /* IAP is done */
            SFCF = SFCF & 0xBF; /* turn off IAP*/
            SFDT = 0;           /* any value other than 0x55 */
            return true;           /* IAP operation is completed*/
        }
        GetTickCount();
    }
    SFCF = SFCF & 0xBF;         /*turn off IAP*/
    SFDT = 0;                   /*any value other than 0x55*/
    return false;               /*IAP operation is NOT completed before time out*/
}

// write a byte to flash
bool FlashWrByte(uint addr, uchar ch)
{
    disable();
    SFCF = SFCF | 0x40;     /*enable IAP */
    SFAH = addr>>8;         /*load high order address byte*/
    SFAL = addr & 0xff;     /*load low order address byte */
    SFDT = ch;              /*load data to be programmed */
    SFCM = SFCM_PB;         /*issue byte program command */

    if(!ready())
    {
        enable();
        return false;
    }
        
    enable();
    return true;
}

// erase sector
// addr: 00h, 80h
bool FlashErSector(uint addr)
{
    disable();
    SFCF = SFCF | 0x40;     /*enable IAP */
    SFAH = addr>>8;         /*load high order address byte*/
    SFAL = addr & 0xff;     /*load low order address byte */
    SFCM = SFCM_SE;         /*issue sector erase command */

    if(!ready())
    {
        enable();
        return false;
    }

    enable();
    return true;
}

// read device data
uchar FlashRdByte(uint addr)
{
    unsigned char readByte;
    disable();
    SFCF = SFCF | 0x40;     /*enable IAP */
    SFAH = addr>>8;         /*load high order address byte*/
    SFAL = addr & 0xff;     /*load low order address byte */
    SFCM = SFCM_VB;         /*issue byte verify command */
    readByte = SFDT;
    SFCF = SFCF & 0xBF;     /*turn off IAP*/
    SFDT = 0;
    enable();
    return readByte;
}

#if 0
void ErBlock0(void)
{
    SFCF = SFCF | 0x40;
    SFAH = 
    SFAL = 
    SFDT = 0x55;
    SFCM = 0x0d;
}
#endif