BOSSA flashing on Arduino Nano 33 BLE (NRF52840)

[dlktdr]

I've been working on a project and am trying to use the Arduino variant of BOSSA to automatically reset it into bootloader mode with a 1200 baud touch.

I've tried including

CONFIG_BOOTLOADER_BOSSA_ARDUINO=y
CONFIG_BOOTLOADER_BOSSA_DEVICE_NAME="CDC_ACM_0"

In the prj.conf file. But I can't seem to get it to work this way.

Also tried to manually do it with the code copied from bossa.c in \soc\arm\atmel_sam0\common but it complains of missing reference cdc_acm_dte_rate_callback_set. Does the NRF52840 usb cdc driver not support the callback or am I doing something wrong here

[stephanosio]

BOSSA is for Atmel (now Microchip) SAM family devices. nRF52840 is not a SAM family device.

[dlktdr]

Arduino did a modified version of Bossa for their Nano 33 BLE from what I understand.

So I take it there is no support for the cdc_acm_dte_rate_callback_set on the NRF device?

[stephanosio]

Arduino did a modified version of Bossa for their Nano 33 BLE from what I understand.

That's interesting. At least, it seems like that portion of code is not open source (couldn't find it anywhere online).

As for cdc_acm_dte_rate_callback_set, try setting CONFIG_USB_CDC_ACM=y and CONFIG_CDC_ACM_DTE_RATE_CALLBACK_SUPPORT=y.

[parasquid]

Sorry for the resurrect, but since this came up in my google search, just wanted to link the source of Arduino's BOSSA modification (not sure if this is everything and fully open source but the license does mention GPLv3)

https://github.com/arduino/BOSSA
shumatech/BOSSA@master...arduino:BOSSA:nrf