My boadrd has a BF531 processor and STM flash (M29w). I want to wriet/flash my customized bootloader throught BF531 into the flash. BF531's onchip boot rom when jumps to 0x20000000 (bank0 of flash) how can it read without the flash driver?
Is it mandatory that I need a seperate flash programmer?
My next question is how to write into the empty flash through BF531 with just the existing onchip boot rom.