Hello, I manage to work with new S310 V2. I use S310 for hrm only. Saying so also not for DFU service. I have own proprietary method for transfering application images via serial port using bootloader. Now I want to replace the Softdevice. a) Which commands do I have to issue? probably : remove write protection for memory from SD vector table start (0x1000) upwards until App vector table start SD_MBR_COMMAND_COPY_SD ... establish write protection b) How does the MBR checks a propper, valid SD? c) What will the MBR do on reboot when the SD update failed? Regards, Adib

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proprietary bootloader to update Softdevice using S310 V2

Hello,

I manage to work with new S310 V2. I use S310 for hrm only. Saying so also not for DFU service. I have own proprietary method for transfering application images via serial port using bootloader.

Now I want to replace the Softdevice. a) Which commands do I have to issue? probably :

remove write protection for memory from SD vector table start (0x1000) upwards until App vector table start
SD_MBR_COMMAND_COPY_SD
...
establish write protection b) How does the MBR checks a propper, valid SD? c) What will the MBR do on reboot when the SD update failed?

Regards, Adib