FLASH操作的工具函数,大家给点评价与意见,:)

只看该作者 · 2008-3-29 09:31

CPU 用的是2812,FLASH为AM29LV160DT(一片)

#define    WRITE_FLASH(addr,data)    *((volatile INT16U*)(addr)) = (INT16U)data

/* ---------------------------------------------------------------------
*   函数名:  waitForOperationEnd
*   函数描述: 等待操作结束
* ----------------------------------------------------------------------*/
BOOL waitForOperationEnd(void)
{
    INT32U addr;
    BOOL    finish** = FALSE;
    INT16U dq5Counter = 0;
    volatile INT16U oldStatus,newStatus;


    addr = 0x101000;

    /* 根据DQ6  和DQ5  判断操作是否完成*/
    oldStatus = *((volatile INT16U *)addr);
    while(1)
    {
        newStatus = *((volatile INT16U *)addr);
        if( (oldStatus & 0x40) == (newStatus & 0x40) )
        {
            finish** = TRUE;
            break;
        }
        else
        {
            if( (newStatus & 0x20) != 0)
            {
                if(dq5Counter ++ >= 1)
                {
                    finish** = FALSE;
                    break;
                }
            }
            oldStatus = newStatus;
        }
    }

    return(finish**);
}
/* ---------------------------------------------------------------------
*   函数名:  addrConvert
*   函数描述: 将0~1m的虚拟地址转化为实际地址
* ----------------------------------------------------------------------*/
INT32U    addrConvert(INT32U virtualAddr)
{
    INT32U realAddr;

    if(virtualAddr < 0x80000)
    {
        GpioDataRegs.GPFDAT.bit.GPIOF14 = 0;
        realAddr = virtualAddr + 0x100000;
    }
    else if(virtualAddr <0x100000)
    {
        GpioDataRegs.GPFDAT.bit.GPIOF14 = 1;
        realAddr = virtualAddr + 0x100000 - 0x80000;
    }
    /* 大于1m 则取1m 对应的实际地址*/
    else
    {
        GpioDataRegs.GPFDAT.bit.GPIOF14 = 1;
        realAddr = 0x17ffff;
    }

    return(realAddr);
}

/* ---------------------------------------------------------------------
*   函数名:  wordRead
*   函数描述: 从flash   指定地址中读字
* ----------------------------------------------------------------------*/
INT16U wordRead(INT32U  virtualAddr)
{
    INT32U    addr;
    addr = addrConvert(virtualAddr);
    return( *((volatile unsigned int *)(addr)) );
}
/* ---------------------------------------------------------------------
*   函数名:  wordWrite
*   函数描述: 向flash   指定地址中写字
* ----------------------------------------------------------------------*/
BOOL wordWrite ( INT32U virtualAddr, INT16U data)
{
    INT32U    addr;
    BOOL    finish** = FALSE;
    INT16U    a19Status = 0;

    addr = addrConvert(virtualAddr);

    a19Status = GpioDataRegs.GPFDAT.bit.GPIOF14 ;
    GpioDataRegs.GPFDAT.bit.GPIOF14 = 0;
    WRITE_FLASH(0x555+0x100000, 0xAA);
    WRITE_FLASH(0x2AA+0x100000, 0x55);
    WRITE_FLASH(0x555+0x100000, 0xA0);

    GpioDataRegs.GPFDAT.bit.GPIOF14 = a19Status;
    WRITE_FLASH(addr, data);
    finish** = waitForOperationEnd();

    return(finish**);
}
/* ---------------------------------------------------------------------
*   函数名:  sectorErase
*   函数描述: 擦除指定扇区
* ----------------------------------------------------------------------*/
BOOL sectorErase(INT32U virtualSectorAddr)
{
    INT32U    sectorAddr;
    INT16U    a19Status = 0;
    BOOL    finish** = FALSE;

    sectorAddr = addrConvert(virtualSectorAddr);

    a19Status = GpioDataRegs.GPFDAT.bit.GPIOF14 ;
    GpioDataRegs.GPFDAT.bit.GPIOF14 = 0;

    WRITE_FLASH(0x555+0x100000, 0xAA);
    WRITE_FLASH(0x2AA+0x100000, 0x55);
    WRITE_FLASH(0x555+0x100000, 0x80);
    WRITE_FLASH(0x555+0x100000, 0xAA);
    WRITE_FLASH(0x2AA+0x100000, 0x55);
    GpioDataRegs.GPFDAT.bit.GPIOF14 = a19Status;
    WRITE_FLASH(sectorAddr, 0x30);
    finish** = waitForOperationEnd();

    return(finish**);
}
/* ---------------------------------------------------------------------
*   函数名:  chipErase
*   函数描述: 擦除整片
* ----------------------------------------------------------------------*/
BOOL chipErase(void)
{
    BOOL    finish** = FALSE;

    GpioDataRegs.GPFDAT.bit.GPIOF14 = 0;
    WRITE_FLASH(0x555+0x100000, 0xAA);
    WRITE_FLASH(0x2AA+0x100000, 0x55);
    WRITE_FLASH(0x555+0x100000, 0x80);
    WRITE_FLASH(0x555+0x100000, 0xAA);
    WRITE_FLASH(0x2AA+0x100000, 0x55);
    WRITE_FLASH(0x555+0x100000, 0x10);

    finish** = waitForOperationEnd();
    return(finish**);
}
/* ---------------------------------------------------------------------
*   函数名:  pointSector
*   函数描述: 找到virtualAddr  所在的扇区地址
* ----------------------------------------------------------------------*/
INT32U pointSector(INT32U virtualAddr)
{
    INT32U sectorAddr = 0;

    if(virtualAddr < 0xF8000)
    {
        sectorAddr = (virtualAddr >> 15) << 15;
    }
    else if(virtualAddr < 0xFC000)
    {
        sectorAddr = 0xF8000;
    }
    else if(virtualAddr < 0xFD000)
    {
        sectorAddr = 0xFC000;
    }
    else if(virtualAddr < 0xFE000)
    {
        sectorAddr = 0xFD000;
    }
    else
    {
        sectorAddr = 0xFE000;
    }
    return(sectorAddr);
}

只看该作者 · 2008-3-29 09:34

GPIOF14连了最高地址线

FLASH操作的工具函数,大家给点评价与意见,:)

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