I am trying to flash a nrf52 dongle w/ the rubble demo https://github.com/jonas-schievink/rubble/tree/044b5370c2b32a73ed47833ab96c1b0cb5a4b797/demos/nrf52-demo

Initially I had trouble with the nrfutil 6.1.0 which is used by dongle-flash from one of the ferrous systems workshops, and hence found this alternative.

So this works fine with debug builds where the elf info is present, I accidentally made a copy & paste mistake, that included

[profile.release.build-override]
codegen-units = 8
debug = false
debug-assertions = false
opt-level = 0
overflow-checks = false

which lead to

error: no loadable program segments found

which really should be

error: missing debug info, assure your binary is built with `debug=true`

which provides some information on what to do

( I ❤️ this tool and a lot of other things you do! )

When the final data object is sent, the CRC response from the bootloader does not include the contained data, and executing the data object results in an "operation not permitted in the current state" error.

Some observations:

• Generating an init packet from the [1,2,3] test-firmware and flashing that using Nordic's pc-nrfutil implementation results in the same behavior.
• Using Nordic's tool to generate the DFU package from the [1,2,3] firmware results in an init packet that specifies an image size of 4 Bytes instead of 3.

The debug output of Nordic's tool indicates that a 0xff byte is appended to the firmware data:

2021-05-03 17:39:27,515 Serial: Streaming Data: len:4 offset:0 crc:0x00000000
2021-05-03 17:39:27,515 SLIP: --> [8, 1, 2, 3, 255]
2021-05-03 17:39:27,516 SLIP: --> [3]
2021-05-03 17:39:27,517 SLIP: <-- [96, 3, 1, 4, 0, 0, 0, 89, 208, 83, 156]
2021-05-03 17:39:27,517 SLIP: --> [4]
2021-05-03 17:39:27,518 SLIP: <-- [96, 4, 1]
2021-05-03 17:39:27,518 Image sent in 0.18145108222961426s

I wasn't able to find how to flash the dongle without overriding the soft device. Is there a way I missed?

We've had a participant run into persistent timeouts when using nrfdfu.

I tried to address this in https://github.com/ferrous-systems/nrfdfu-rs/tree/try-forever, but this did not seem to help.

We should troubleshoot on Win10

Build the "blinky" example from https://github.com/nrf-rs/adafruit-nrf52-bluefruit-le

Ensured i got a elf file:
file target/thumbv7em-none-eabihf/release/examples/blinky
target/thumbv7em-none-eabihf/release/examples/blinky: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), statically linked, with debug_info, not stripped

Tried to use nrfdfu and got this error:
nrfdfu target/thumbv7em-none-eabihf/release/examples/blinky
error: no loadable program segments found; ensure that the linker is invoked correctly (passing the linker script)

Not sure where to go from here.