Program option bytes on STM32G4xx

[embitz]

What you have to do:

- Add at the end of the EBlink XML memory map the sector with the option base address and right length
- Give that sector a fake number e.g. 999 (something which is out of range of normal flash) 
- Give that sector a virtual attribute to exclude it from the EBlink caching algorithm (property sectype = virtual)
- In the EBlink erase function filter on sector number 999 to skip normal flash erase function
- In the EBlink flash write function filter on sector number 999 and jump to a new to create function e.g. "option_write"
- Create new "option_write" function with the right algorithm to program option bytes

Check the script code for the stm32h7 which supports option programming. e.g. Memory map H7:

Code:

const mem_template_H7 = @@" <?xml version=\"1.0\"?> <memory-map>     <snip...>       <!-- option byte area (virtual sector) -->     <memory type=\"flash\" start=\"0x1ff20000\" length=\"32\">         <property name=\"blocksize\">32</property>         <property name=\"secstart\">999</property>         <property name=\"sectype\">virtual</property>     </memory> </memory-map>"

H7 erase function:

Code:

function flash_erase(sector, address) {     local regbase = FLASH_REG_BASE_B0 // first flash bank     // Skip the virtual option sector     if(sector == 999)       return ERROR_OK          <snip...> }

H7 write function:

Code:

function flash_write(sector, address, buffer) {     local regbase = FLASH_REG_BASE_B0 // first flash bank     // If this is the virtual option sector, go to options write function     if(sector == 999)       return option_write(buffer)     <snip...> }

H7 option_write:

Code:

function option_write(buffer) {    <snip...> }

Last but not least, if everything works: share it.

P.s. It's not much work but currently I'm a bit busy.