Rak2270 with STMCubeProgrammer

[jerteach (Jeremy Ellis)]

RAK2270 Sticker Tracker with the cube programmer

@carlrowan Getting there just have to figure out the connections.

[carlrowan]

Hi @jerteach ,

Common issues that I know of

1. Loose jumper wires
2. Boot0 pin not pulled-up
3. COM port selection mismatch
4. USB-Serial not supported (RAKDAP1 as USB-UART doesn’t work in my PC)

[carlrowan]

I did a quick test on RAK3172-SiP. It is detected fine.

[jerteach (Jeremy Ellis)]

Thanks @carlrowan interesting baudrate for you (230400) mine trys 115200.

Good ideas about renaming the main .hex file without periods and spaces, I will try that.

Reminder I am using the RAK2270 I assume everything is the same as the RAK3172-SiP.

One weird little thing, how do you pull BOOT0 high on the RAK2270 sticker Tracker Development board and stably keep it high for the .hex file upload?

[jerteach (Jeremy Ellis)]

I did some test but nothing really different. I can’t seem to see a setting to use the SWD connections with the stm32cubeProgrammer but that might be an option since on the other thread I am having some success.

Flashing the bootloader using the RACDAP1 with RAK2270

@carlrowan I am getting some kind of results using the pyocd and pulling the BOOT0 pin HIGH does that make any sense? I am also using one of my DIY 3D Printed clips to hold the BOOT0 to VCC pads together. Also slightly possible that drag and drop works using this same arraignment of the SWD connections and BOOT0 to VCC. My latest test I got uploading but forgot to blank the old installed program so not yet seeing any positives, other than uploading using pyocd seems to be working. I will test m…

[carlrowan]

Hi @jerteach ,

Making the baudrate slower is an option as well.

RAK2270 is based on RAK3172-SiP so the process is the same.

With regards to BOOT0, it is beside the VCC so it is not really difficult. Maybe solder a wire where you can short by twisting it.

[carlrowan]

The SWD connection to STM32CubeProgrammer will require you an ST-Link. I doubt that it can support the RAKDAP1.

[jerteach (Jeremy Ellis)]

Thanks @carlrowan not sure why but the st-link-v2 worked write away. Possibly even worked without the BOOT0 set HIGH. I will have to test that out. Anyway, I guess I can un-brick a RAK2270 now. I will test things out tomorrow and hopefully make a video. Thanks so much for your help.

Here is an image of my debuggers. I try not to use them.

RAKDAP1 → Particle-DAP-debugger → ST-Link-V2 -->J-link-Edu

[carlrowan]

That’s correct. STlink will work right off-the-bat. It depends on your setting if you need control on reset but swd pins is enough.

Boot pin is only needed for the UART bootloader.

[jerteach (Jeremy Ellis)]

@carlrowan I would still like to get the RakDap1 working for both drag and drop and pyocd but for now the ST-Link-V2 is working well.

Here is the video link here

It is easy to upload the firmware.hex file but also easy to upload an Arduino compiled binary (Arduino IDE → Sketch–>Export-Compiled-Binary). I saw the ArduinoIDE “sketch–>upload using programmer” but could not get it working.