UART DFU MBR example

RE: UART DFU MBR example

Dinkin Uri — Thu, 18 Feb 2021 10:21:30 GMT

That what I did already. Thank you tried to help.

RE: UART DFU MBR example

Hung Bui — Thu, 18 Feb 2021 10:17:34 GMT

Hi Uri,
The nRF52805 is very similar to the NRF52810, with some differences in the peripherals, but not in the flash and RAM.
You can re-use the PCA10040E project (which is for NRF52810) for the nRF52805. You may need to switch the boards.h setting to choose nrf52805 instead of nRF52810.

RE: UART DFU MBR example

Dinkin Uri — Thu, 18 Feb 2021 09:47:19 GMT

Ok, thank you. Where can I find uart dfu project for 805?

RE: UART DFU MBR example

Hung Bui — Wed, 17 Feb 2021 10:46:25 GMT

Please try to setup a test bench, you can use a NRF52 DK to test receiving image.

What you are trying to build is quite complex and requires good understanding of the bootloader and the DFU protocol. I don't see any way of achieving that without good debug setup. I would suggest to get very familiar with the UART DFU process, by first testing it with the nrfutil on PC.

RE: UART DFU MBR example

Dinkin Uri — Wed, 17 Feb 2021 10:22:15 GMT

Hi, the problem is that 805 is not exposed to PC, the only way is via 840. Can I send you project and may be you discover the problem?

RE: UART DFU MBR example

Hung Bui — Tue, 16 Feb 2021 10:59:42 GMT

Hi Uri,
Have you tried to use nRFutil application on PC to send the same image ?
Have you done any successful DFU update to your NRF52805 chip ?

If you can do a DFU update using the nRFUtil you can capture a logic trace of the UART pins. And then do the same with your/my DFU bootloader and compare the two.

Which error code was thrown after you sent the init packet ?

RE: UART DFU MBR example

Dinkin Uri — Mon, 15 Feb 2021 16:08:40 GMT

Yes, I try send from nrf52840 that is my master send to nrf52805 via uart. I used your sample to send package and I have the same behavior, your program is stuck after it starts to send image because your code is blocking on uart transfer bit, but init packet is sent ok.

RE: UART DFU MBR example

Hung Bui — Mon, 15 Feb 2021 09:25:53 GMT

Hi Uri,
Could you clarify that you are planning to send image from a nRF52 to another nRF52 ?
Which example did you base your DFU master on ? Have you got a look at my example here ?
I would suggest to test doing DFU from PC or from my example with no modification , just to test and make sure the bootloader on the DFU target works fine. After that you can start to test on your own DFU master.

If it works with my example (or from PC) but not on your DFU master, you can try to record a logic trace on the UART pins and compare what is sent from my example or PC with what you send from your DFU master.

RE: UART DFU MBR example

Dinkin Uri — Mon, 15 Feb 2021 05:59:35 GMT

No I have not log from boot loader. I implemented protocol of boot loader in main processor that connected via uart with processor with boot loader. I send init packet and it is working fine, but when I start to send image boot loader crushes. I modified project to match it to 52805, because nordic does not provide boot loader for this processor, and modifications is not only for size, but I'm sure I implemented the protocol in right way. The problem in boot loader definitions. What can be a problem in boot loader writing firmware? What definitions in sdk_config.h I should to check?

RE: UART DFU MBR example

Dinkin Uri — Mon, 15 Feb 2021 05:59:15 GMT

RE: UART DFU MBR example

Hung Bui — Wed, 10 Feb 2021 11:04:37 GMT

Hi,

Do you have any log from the bootloader and from nrfutil ?

Have you done any modification to the bootloader ? Have you successfully tested with the stock bootloader example and managed to update for example the blinky example ?

RE: UART DFU MBR example

Dinkin Uri — Wed, 10 Feb 2021 09:57:27 GMT

Hi, I encountered in problem when I send fw image to boot loader, it is crushes after second write request, init packet sent ok, but when i start transfer fw image it boot loader is crushed. Do you know what can be a reason?

RE: UART DFU MBR example

Hung Bui — Thu, 14 Jan 2021 15:36:55 GMT

No, you need to edit the linker_section_placement_macros instead.
Please have a look at the blinky mbr example located at \examples\peripheral\blinky\pca10040\mbr\ses

It's made for the nRF52832 but you just need to adjust the size of flash to match with your nRF52805

RE: UART DFU MBR example

Dinkin Uri — Thu, 14 Jan 2021 13:56:20 GMT

I create project CortexM4 for device nrf52805. In main I create output gpio and timer0 with 500 ms frequency. Run it and it run great. Now I go to project and put linker_section_placements_segments="FLASH RX 0x00001000 0x00029000;RAM RWX 0x20000000 0x00006000" and run. What I see it does not run, it just stopped in address 0x2A0

RE: UART DFU MBR example

Hung Bui — Thu, 14 Jan 2021 13:06:16 GMT

Could you explain what exactly you did when you moved main application to address 0x1000h ?

Usually what you need to do is to configure the start flash address FLASH_START in the linker to the address 0x1000. This will also move the vector table to 0x1000

RE: UART DFU MBR example

Dinkin Uri — Thu, 14 Jan 2021 11:37:55 GMT

Hi, thank you for your help. I moved main application to address 1000h and it runs. I work with nrf52805, when I enable timer0 it application jumps to address that is unknown. Should I do something with vector table, move it to the same address (0x1000)? I make blinking with led and it works fine, but timer raise interrupt and program entering to address 0x2A0

RE: UART DFU MBR example

Dinkin Uri — Thu, 07 Jan 2021 21:02:07 GMT

Thank you. I will try

RE: UART DFU MBR example

Hung Bui — Wed, 06 Jan 2021 13:06:12 GMT

Hi Uri,

The MBR is needed for the bootloader to operate. If your application started from address 0, you would need to move it to MBR_SIZE (0x1000). You can refer to our blinky example made for MBR compatibility \examples\peripheral\blinky\pca10040\mbr.