How STM8 uses its own bootloader

1. First, confirm whether the STM8 you are using has its own bootloader. Refer to the table below

2. STM8 empty devices can directly use the built-in bootloader.

3. After STM8 is burned with SWIM, if you want to continue to use the built-in bootloader, you must set the optional byte to 0x55AA. As shown below:

The method of setting these two bytes can be modified using ST Visual Programmer, as shown below:

However, this software shows that only 487Eh can be modified to 0x55, 487Fh has not been changed. The official software, very strange. So, I take the next approach

Set in the program, and then download it once with SWIM, once is enough . Use library functions as follows:

/* Define FLASH programming time */
FLASH_SetProgrammingTime(FLASH_PROGRAMTIME_STANDARD);
/* Unlock EEPROM Data memory */
FLASH_Unlock(FLASH_MEMTYPE_DATA);
FLASH_ProgramByte(0x487E,0x55);
FLASH_ProgramByte(0x487F,0xAA);
FLASH_Lock(FLASH_MEMTYPE_DATA);

4. Finally, the Flashloader software of ST must be clicked within 1S after the device is reset. The settings are as follows:

The echo option can be unselected first. If the display fails, it prompts you to select echo, and then you select it.

 

Attached the original English description:

For the detailed bootloader process, please refer to UM0560. According to this manual, you can write the burning process into your own host computer software without using flashloader.