How to programming ROP option byte via swim?

[yskim2]

Posted on March 17, 2011 at 04:09

How to programming ROP option byte via swim?

#programmer #stm8

[brazov22]

Posted on May 17, 2011 at 15:12

to write on option byte area you need to set7reset bit 7 of FLASH_CR2/FLASH_NCR2 register. Remenber to enter keys on FLASH_DUKR register before.

If ROP is activated, remove it writing 00h on 4800h then reprogram option bytes as you prefer. Note that removing ROP, whole program memory is erased.

brazov2

[yskim2]

Posted on May 17, 2011 at 15:12

Thanks Mr brazov.

I Solved this problem

STM8L15x devices are some different than others.

My code is below.

  swim_enter();

  delay_10xus(Time_us(10000));

  icp_eeprom_unlock();

  

  swim_write_register(STM8_FLASH_CR2, (STM8_FLASH_CR2_ERASE)); 

  swim_write_register(0x4800, 0x00);

  

  delay_10xus(Time_us(6000));

   

  swim_write_register(STM8_FLASH_CR2, (STM8_FLASH_CR2_OPT));

  swim_write_register(0x4800, 0xAA);

Thanks a lot..

[ajacobo]

Posted on May 17, 2011 at 15:12

Hi Kim yongsu,

Please could I have a copy of your code, I am trying to make my own programmer but I cannot make it yet, I would like to know if you can share your code to implement it in my programmer.

Thank you very much

[ncliv2001]

Posted on May 17, 2011 at 15:12

Hello,

Do you have any schematic for such a STM8 programmer? I'd like to build one for me.

Thanks

[pripoy08]

Posted on October 18, 2013 at 12:00

Hello!

Help please!

STM8S003F3

The sequence of operations Read out protection ENABLED

''

write_Byte(FLASH_DUKR,0xAE);

  write_Byte(FLASH_DUKR,0x56);

write_Byte(FLASH_CR2,0x80); 

    write_Byte(FLASH_NCR2,0x7F);

uint32_t time_set = 3000;

    while(time_set-- != 0)

    {

      if(read_Byte(FLASH_IAPSR)&(1<<3))

      {

        wait_time(2000);

        write_Byte(OPTION_BYTE,0xAA);

      }

    }

''

Upon reboot, the MC, reading OPTION_BYTE returns 0xAA,

after the restart, reading OPTION_BYTE and the Flash returns 0x71

The sequence of operations Read Out Protection DISABLED

''

write_Byte(FLASH_DUKR,0xAE);

  write_Byte(FLASH_DUKR,0x56);

write_Byte(FLASH_CR2,0x80); 

    write_Byte(FLASH_NCR2,0x7F);

uint32_t time_set = 3000;

    while(time_set-- != 0)

    {

      if(read_Byte(FLASH_IAPSR)&(1<<3))

      {

        wait_time(2000);

        write_Byte(OPTION_BYTE,0x00);

      }

    }

''

After recording OPTION_BYTE MC stop responding to any action. SWIM interface does not work.