Stopped run while erasing sector3

[Anonymous]

Dear sir

I use IC MB95F698K in codding. while i was erasing sector 3 , I found my code was stopped after erased sector address.  below my code. 

#define SA3 ((unsigned char *) 0x8000)

#define seq_8AAA ((volatile unsigned char *)0x8AAA)

#define seq_8554 ((volatile unsigned char *)0x8554)

void main(void){

LVDPW = 0xC8;

LVDCC_LVDEON = 0;

SYSC_RSTOE = 0;

SYSC_RSTEN = 0;

SYCC = 0xD8; // 4MHz

FSR_SSEN=1; //Swap SA3 2Kbytes top to SA1

erase_sector3(SA3);

/*................ task...........................*/

..........

.....

.....

....

}

int erase_sector3(unsigned char  *adr ){

unsigned int flag;

unsigned char data_ee_timeout;

flag=0;

data_ee_timeout = 20;

FSR_WRE = 1; // programming enable

SWRE0 = 0x0F;    

*seq_8AAA = 0xAA; // Send erase commands to SA3

*seq_8554 = 0x55;

*seq_8AAA = 0x80;

*seq_8AAA = 0xAA;

*seq_8554 = 0x55;

*adr= 0x30; // Erase !!!

while((flag==0)&&(data_ee_timeout))   // <<<<< Stop this point.

{

WDTC=0x35; //Clear watch dog timer

data_ee_timeout--;

if((*adr & DQ7) == DQ7)  // Check Data polling bit

{

flag = 1;     // Successfull Erase

}

if((*adr & DQ5) == DQ5) // Check Timeout bit

{

if((*adr & DQ7) == DQ7)

{

flag = 1; // Successfull Erase

}

else flag = 2; // Timeout error during erase

}

}

FSR_WRE = 0;

return(flag)

}

[Roy_Liu]

Are the code you posted is runing on another controller? which is to erase flash content of MB95F698K ?

I didnot figure out how the (flag==0)&&(data_ee_timeout) can =1 when it is reached the first time.

[Anonymous]

Thank you for your comment.

1.Are the code you posted is runing on another controller?

Ans >> I run on MB95F698K by debug of softune workbench.

2.which is to erase flash content of MB95F698K ?

Ans>> In loop main i call function erase_sector3(SA3) and i sent first address of sector 3 is 0x8000. I  did it following flash memory command sequence table.

int erase_sector3(unsigned char  *adr ){

unsigned int flag;

unsigned char data_ee_timeout;

flag=0;

data_ee_timeout = 20;

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////

///////////// This code erase sector 3 in flash memory of MB95F698K.////////////////////////////

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////

FSR_WRE = 1; // programming enable

SWRE0 = 0x0F;    // enable sector 0,1,2,3

*seq_8AAA = 0xAA; //

*seq_8554 = 0x55;

*seq_8AAA = 0x80;

*seq_8AAA = 0xAA;

*seq_8554 = 0x55;

*adr= 0x30; // Erase !!!

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////

////////////////////////////////////////////////////////////////////////////////////////////////////////////////

// To check erase completed and time out.

while((flag==0)&&(data_ee_timeout))

3.I didnot figure out how the (flag==0)&&(data_ee_timeout) can =1 when it is reached the first time.

Ans >>  (flag==0)&&(data_ee_timeout) // I define  flag=0 and data_ee_timeout =20 at first time. if this line flag==0 mean true and data_ee_timeout != 0  mean true. when it is reached at that line, it was stopped this line. Actually ,it should run continue.

Note. when i erased sector 0,1,2 . It wasn't stopped at that line. just sector 3 only.

[ChaoHaiM_11]

The flash size of MB95F698 is 60K which includes two bank:

upper bank: 32 Kbyte × 1 + 24 Kbyte × 1;

lower bank: 2 Kbyte × 2

Attention please:

From the user manual "Data can be updated by executing a program in RAM or by executing a program in the Flash

memory in dual operation. The erase/program operation and the read operation can be executed

in different banks (upper bank/lower bank) simultaneously".

The code of flash operation, you can also refer to the URL: MB95F718m

[Anonymous]

Thank for your suggestion

I did following for your suggestion but it still was stopped at the same point.

[ShipingW_81]

Sorry for late reply.

I'd like to confirm how could recognize the code stops at that line, code just gets stuck?

What are the values of flag and data_ee_timeout at the time code stops?