LPC1857, Chip_IAP_ErasePage(addr_start, addr_start) fail!

[KellyZou]

Hi Guys,

I want to use the internal flash for saving some data in BANK B with Sector_64KB.

I only succeeded in writing data to the fronter pages(1024B) of this sector a few times. 

But now it is no possible to erase the page anymore, the code is stucked in Chip_IAP_ErasePage().

Here is my steps:

1. Chip_IAP_PreSectorForReadWrite(sector, bankB)

    -- ret_code = IAP_CMD_SUCCESS;

2. Chip_IAP_ErasePage(addr_start, addr_start)

    -- stucked. (But it successed for a few times)

Please help what I can do.

Thanks.

[KellyZou]

Thank you Mr.Zhang

I did do the same step as you did, but it didn't work.

Is there any misunderstanding about the erase process?

__disable_irq();
ret_code = Chip_IAP_PreSectorForReadWrite(sector, sector, bank);
/* Error checking */
if (ret_code != IAP_CMD_SUCCESS) {
return ret_code;
}

/* Only erase a page */
ret_code = Chip_IAP_ErasePage(addr_page_start, addr_page_start);

/* Error checking */
if (ret_code != IAP_CMD_SUCCESS) {
}
__enable_irq();

[ZhangJennie]

Did you check the error code？

[KellyZou]

No, just stucked in the function Chip_IAP_ErasePage().

[ZhangJennie]

Can I reproduce your issue with NXP demo code? Please let me know the the demo link and name. Thanks.

[ZhangJennie]

Hi

In order to erase a page , please make sure you prepare that particular sector beforehand.
Following code will erase first page in Bank B.

/* Prepare sector 0 in Bank B*/

ret_code = Chip_IAP_PreSectorForReadWrite(0, 0, IAP_FLASH_BANK_B);
 

/* Error checking */

if (ret_code != IAP_CMD_SUCCESS) {

while(1);

DEBUGOUT("Command failed to execute, return code is: %x\r\n", ret_code);

}

/* Erase Page */

Chip_IAP_ErasePage(START_PAGE_ADDR,END_PAGE_ADDR);

Thanks,

Jun Zhang