nRF51 and nRF52 Firmware update with another MCU over UART

RE: nRF51 and nRF52 Firmware update with another MCU over UART

Mehdi — Wed, 24 Jun 2020 12:42:30 GMT

Thank you :)

RE: nRF51 and nRF52 Firmware update with another MCU over UART

Jørgen Holmefjord — Wed, 24 Jun 2020 11:37:58 GMT

Unfortunately, I'm not aware of any secure serial DFU bootloader for nRF51. Secure DFU was introduced in SDK 12.0.0, but only with BLE bootloader. Serial DFU bootloader was added to SDK 13.0.0, but nRF51 support was dropped from the SDK after SDK 12.3.0.

I checked with one of my colleagues, and he did not think there were major changes to the bootloader architecture in SDK 13, so the best option would be to port the secure BLE DFU bootloader in SDK 12.3.0 to serial transport. You can have a look at the serial bootloader in SDK 13.0.0 and try to imitate the code and port it back to SDK 12.3.0 BLE project for nRF51.

RE: nRF51 and nRF52 Firmware update with another MCU over UART

Mehdi — Wed, 24 Jun 2020 08:42:25 GMT

Hi Horgen,

Thank you for your quick reply, if I understood correctly, the given implementation is the unofficial DFU master example of secure DFU UART given in the SDK. But I see in SDK 17.0.0 and SDK 15.2.0 that there is no DFU UART secure implementation for nRF51.

Is there any official or unofficial UART DFU (slave side) implementation for nRF51?

If not, is it possible to migrate the given DFU UART (slave side) example to nRF51?

Best Regards,

Mehdi

RE: nRF51 and nRF52 Firmware update with another MCU over UART

Jørgen Holmefjord — Tue, 23 Jun 2020 12:42:56 GMT

Hi,

We do not have any solutions for STM32, but we have som unofficial DFU master examples implemented in C. You can find it in Appendix 6 in this blog post.

I suppose it should be possible for you to port this example code to the STM32 devices.

Best regards,
Jørgen