mx1611drv.c

M3355的源代码

#include <comsub.h>

#if ( _FLASH_TYPE==MX1611 )

#include <flash.h>
#define TimeOut     0x2100
#define CmdOffset1  0xDFC0AAAA
#define CmdOffset2  0xDFC05554
#define PageSize    64
extern void DisInt();
extern void EnInt();
BOOL Chip_Erase_Op(void)
{
    int loopCounter = 0;
    BOOL TimeOutFlag = 0;
    BOOL EraseOKFlag = 1; // clear the erase ok flag to be TRUE
    WORD *FlashAddr;
    BYTE statusReg;

    // write Chip_Erase_command ;
    FlashAddr = CmdOffset1; // write 6 commands to enter Chip Erase operation
    *FlashAddr = 0xAA;
    FlashAddr = CmdOffset2;
    *FlashAddr = 0x55;
    FlashAddr = CmdOffset1;
    *FlashAddr = 0x80;
    FlashAddr = CmdOffset1;
    *FlashAddr = 0xAA;
    FlashAddr = CmdOffset2;
    *FlashAddr = 0x55;
    FlashAddr = CmdOffset1;
    *FlashAddr = 0x10;

    while(1) // set a loop to check the flash's WSM till ready or system time out
    {
        FlashAddr = CmdOffset1; // Switch to read status mode
        *FlashAddr = 0xAA;
        FlashAddr = CmdOffset2;
        *FlashAddr = 0x55;
        FlashAddr = CmdOffset1;
        *FlashAddr = 0x70;
        statusReg = *FlashAddr; // read status from flash
        if((statusReg & 0x80) == 0x80) // Is the Q7(ready/busy bit) ready or not ?
        {
            if((statusReg & 0x20) == 0x00) // It is successfully erased if Q5(erase flag) is equal to ˉ 0ˇ
                break; // exit chip erase polling loop
            else
            {
                EraseOKFlag = FALSE; // if Q5 is ˉ1ˇ, then the chip erase was failed
                FlashAddr = CmdOffset1; // write Clear status command to clear status Reg.
                *FlashAddr = 0xAA;
                FlashAddr = CmdOffset2;
                *FlashAddr = 0x55;
                FlashAddr = CmdOffset1;
                *FlashAddr = 0x50;
                break;
            }
        }
        delay(1); // the delay time is adjustable and deponed on the system clock
        if(TimeOut < loopCounter++) // The number for timeout must be set bigger than Max. of the spec.
        { // Basically, this time out loop to prevent system hang up is no necessary,
            EraseOKFlag = FALSE; // since the flash already provides the Q7 ready/busy bit for that.
            FlashAddr = CmdOffset1; // write Clear status command to clear status Reg.
            *FlashAddr = 0xAA;
            FlashAddr = CmdOffset2;
            *FlashAddr = 0x55;
            FlashAddr = CmdOffset1;
            *FlashAddr = 0x50;
            break;
        }
    }
    FlashAddr = CmdOffset1; // RESET command to reset flash to read operation
    *FlashAddr = 0xAA;
    FlashAddr = CmdOffset2;
    *FlashAddr = 0x55;
    FlashAddr = CmdOffset1;
    *FlashAddr = 0xF0;
    return (EraseOKFlag); // report the final result to main program
} /* end of Chip_erase_Op */
//////

BOOL Page_Program_Op(int PageNum, WORD *PageData)
{
    int i;
    int loopCounter = 0;
    BOOL TimeOutFlag = 0;
    BOOL ProgramOKFlag = 1; // clear the program ok flag to be TRUE
    WORD *FlashAddr;
    //   WORD aaa;
    BYTE statusReg;

    DisInt(); // Disable system's Interrupt;
    // System interrupts might cause page data downloaded flow to be improperly
    // ended. Disable all system interrupts before going to page program operation.
    // write Program_command
    FlashAddr = CmdOffset1; // write 3 commands to enter program operation
    *FlashAddr = 0xAA;
    FlashAddr = CmdOffset2;
    *FlashAddr = 0x55;
    FlashAddr = CmdOffset1;
    *FlashAddr = 0xA0;

    for(i=0; i<PageSize; i++) // set a loop to down load whole page data into flashˇs buffer
    {
        /* Load whole page data into flash's buffer follow the write Program
           cmd and the successive data must be loaded within 30us from
           the rising edge of /WE to falling edge of /WE */
        FlashAddr = 0xDFC00000 + PageNum * 128 + i*2;
        //      PRINTF("Write to Flashaddr = %x \n",FlashAddr);
        *FlashAddr = *(PageData + i);
        //aaa= *(PageData + i);
        //PRINTF("PageData=%x \n",aaa);
    }
    EnInt(); // Enable system's Interrupt;
    // wait 100us for closing page data load window and entering Program operation
    for (i=0;i<10000;i++)
    {}
    while(1) // set a loop to check the flash's WSM till ready or system time out
    {
        FlashAddr = CmdOffset1; // Switch to read status mode
        *FlashAddr = 0xAA;
        FlashAddr = CmdOffset2;
        *FlashAddr = 0x55;
        FlashAddr = CmdOffset1;
        *FlashAddr = 0x70;
        statusReg = *FlashAddr; // read status from flash
        if((statusReg & 0x80) == 0x80) // Is the Q7(ready/busy-bit) ready ?
        {
            if((statusReg & 0x10) == 0x00) // It is successful to program if Q4(Program flag) is equal to ˉ 0ˇ
                break; // exit program polling loop
            else
            {
                ProgramOKFlag = FALSE; // if Q4 is ˉ1ˇ, then program was failed */
                FlashAddr = CmdOffset1; // write Clear status command to clear status Reg.
                *FlashAddr = 0xAA;
                FlashAddr = CmdOffset2;
                *FlashAddr = 0x55;
                FlashAddr = CmdOffset1;
                *FlashAddr = 0x50;
                break;
            }
        }
        delay(1); // the delay time is adjustable and deponed on the system clock
        if(TimeOut < loopCounter++) // The number for timeout must be set bigger than Max. of the spec.
        { // Basically, this time out loop to prevent system hang up is no necessary,
            ProgramOKFlag = FALSE; // since the flash already provides the Q7 Ready/busy bit for that.
            FlashAddr = CmdOffset1; // write Clear status command to clear status Reg.
            *FlashAddr = 0xAA;
            FlashAddr = CmdOffset2;
            *FlashAddr = 0x55;
            FlashAddr = CmdOffset1;
            *FlashAddr = 0x50;
            break;
        }
    }
    FlashAddr = CmdOffset1; // RESET command to reset flash to read operation
    *FlashAddr = 0xAA;
    FlashAddr = CmdOffset2;
    *FlashAddr = 0x55;
    FlashAddr = CmdOffset1;
    *FlashAddr = 0xF0;
    return (ProgramOKFlag); // report the final result to main program
} /* end of Page_Program_Op */


#if 0
BOOL Page_Program_Op(int PageNum, WORD *PageData)
{
    return 1 ;
} /* end of Page_Program_Op */
#endif

#endif /*#if ( _FLASH_TYPE==MX1611 )*/