Unable to erase flash using bootloader via UART command

[Anilkumar1011]

Hi All,

Part number: STM32G0B0

Flash : 512KBytes

This chip supporting only extended erase (0x44) command. Its working perfectly fine for Full chip erase(0xFFFF) , Bank-1(0xFFFE) and Bank-2(0xFFFD). But facing issue when try to erase specific memory/number of page.

Logs as following:

I (3137) : stm_pro_mode (resetSTM_to_enter_boot_mode:104) Enter boot mode
 I (3137) : stm_pro_mode (cmdSync:144) SYNC
  I (3137) : stm_pro_mode (sendBytes:267) 0x79
I (3147) : stm_pro_mode (sendBytes:271) Sync Success
I (3147) : stm_pro_mode (cmdGet:153) GET
I (3157) : stm_pro_mode (sendBytes:267) 0x79
I (3167) : stm_pro_mode (sendBytes:271) GET Success
I (3167) : stm_pro_mode (cmdVersion:162) GET VERSION 
I (3177) : stm_pro_mode (sendBytes:267) 0x79
I (3187) : stm_pro_mode (sendBytes:271) GET VERSION read command success
I (3187) : stm_pro_mode (cmdId:171) CHECK ID
I (3197) : stm_pro_mode (sendBytes:267) 0x79
I (3207) : stm_pro_mode (sendBytes:271) CHECK ID command Success

I (3227) : stm_pro_mode (cmdExtErase:196) EXTENDED ERASE MEMORY
I (3247) : stm_pro_mode (sendBytes:267) 0x79

Here Extended erase failed when send customize erase 

Page number to be erase : 10 pages

start address of page        : page -0 (0x8000000)

code :

int cmdExtErase(void)

{

     int i =0;

    char checksum = 0;

    uint8_t pg_byte  = 0;

    uint8_t pg_num = 0;

    char buf[23];   // 2+2*(pages)+1

    int resp = 1;

   int pages = 10;

  uint8_t spage = 0;

  char bytes[] = {0x44, 0xBB};

  logI(TAG_STM_PRO, "%s", "EXTENDED ERASE MEMORY");

  int status = sendBytes(bytes, sizeof(bytes), resp);

  if (status == 1)

 {

      // Specific range of memory erase

     logI(TAG_STM_PRO, "%d", pages);

      //MSB of page number

     pg_byte  = (pages -1 ) >> 8;

     buf[i++] = pg_byte;

    checksum ^= pg_byte;

    pg_byte = (pages - 1) & 0xFF;

   //LSB of page number

   buf[i++] = pg_byte;

   checksum ^= pg_byte;

   // page numbers (0 to 10)

   // page start from 0 

   for (pg_num = spage; pg_num <( spage + pages); pg_num++)

  {

      pg_byte = pg_num >> 8;

      checksum ^= pg_byte;

      buf[i++] = pg_byte;

      pg_byte = pg_num & 0xFF;

      checksum ^= pg_byte;

      buf[i++] = pg_byte;

  }

    buf[i++] = checksum;

    return sendBytes(buf, sizeof(buf), resp);

 }

return 0;

}

Kindly review and suggest.

Thanks,

Anil

[TDK]

Can you output the bytes you're sending and receiving? That's going to be a lot easier than interpreting code.

[Anilkumar1011]

Hi Guru,

For extended erase sending following data

Send part 1:

0x44 0xBB

output : 0x79   (Received  ACK)

Send part 2:

|total page count- to be erase | pages | checksum

00 04 00 00 00 01 00 02 00 04 00 05 06

output : time out 

for timeout error, tried different timeout 3/5/10 seconds but other command working perfectly fine.

Thanks,

Anil