How to change the controller from IAP mode to ISP

[RK.10]

Hi,

I have a system that is packed entirely. I have only a USB port and reset pin for my access. Now, How can I move the controller from In-Application Programming mode to In-System Programming mode?

[TDK]

Not quite sure what you mean, but if the USB is a supported bootloader peripheral for your unknown chip, you could jump to the bootloader and use USB to program it.

[RK.10]

Hi,TDK

Thanks for the answer, I am using the STM32G070KB chip.USART1 bootloader is supported. As per the AN2606 note, 0x1FFF0000 is the address of the bootloader. I am moving to the bootloader section by Pattern 11(erasing the first page). Is there any other way to move to bootloader address( 0x1FFF0000) from the main code(Main flash memory code)? I am using C language in Keil Vision 5 .

[RK.10]

Hi,TDK <> Thanks for the answer, I am using the STM32G070KB chip.USART1 bootloader is supported. As per the AN2606 note, 0x1FFF0000 is the address of the bootloader. I am moving to the bootloader section by Pattern 11(erasing the first page). Is there any other way to move to bootloader address( 0x1FFF0000) from the main code(Main flash memory code)? I am using C language in Keil Vision 5 .

[TDK · Accepted solution]

See this for how to jump to the bootloader in software:

https://stm32f4-discovery.net/2017/04/tutorial-jump-system-memory-software-stm32/

Should be similar (probably identical) for the STM32G0 series. Note that the bootloader assumes the chip is in a reset state, so some periperphals/interrupts need disabled first.

You could also set the boot option bytes to jump to the bootloader on reset, then reset the device.

[RK.10]

Thanks TDK.