Short time dfu issues

RE: Short time dfu issues

Hieu — Fri, 26 Apr 2024 13:15:19 GMT

Hi Alien,

If I understand the FT231X chip right, it is just a UART to USB bridge. If so, then as long as the nRF device DTR is raised high, it should also set DTR bit in the virtual COM port.

Best,

Hieu

RE: Short time dfu issues

alien — Fri, 26 Apr 2024 05:47:10 GMT

Hi Hieu,

What if I have an individual usb to seiral pcb board. The chip is FT231X, it connected nRF device through GPIO. How can I keep dtr pin always high on the individual board.

Best

Alien

RE: Short time dfu issues

Hieu — Thu, 25 Apr 2024 12:51:10 GMT

Hi Alien,

You are talking about keeping DTR high on the nRF device, right? As you don't have HWFC on the nRF end, your UART peripheral are not actually controlling any pin as DTR. You should be able to just set a pin as a GPIO output and control it as you wish.

Could I be misunderstanding you somehow here?

Hieu

RE: Short time dfu issues

alien — Thu, 18 Apr 2024 06:59:40 GMT

Hi Hieu,

Thanks for your reply!

Right now I may work it out by changing the nrfutil python script.

But I have met another problem:

I need to keep DTR always high when perform DFU.

Since I have disabled Flow Control.

The DTR will first stay high for a short time and stay low before the dfu is finished.

Can I keep DTR/RTS always high?

Alien

RE: Short time dfu issues

Hieu — Tue, 16 Apr 2024 12:34:54 GMT

Hi Alien,

You can run a comparison of the files between the pca10040 no-debug and with-debug project. Most of the differences are in sdk_config.h, and the memory region size in the project files.

By the way, what IDE are you using and at which version? Also, what version of the SDK are you using? Please remember to use the version listed in the release note of the SDK.

Hieu

RE: Short time dfu issues

alien — Mon, 15 Apr 2024 12:39:02 GMT

Hi Hieu,

Since there is no example for pca10100 uart bootloader.

So I changed relevant settings in pca10040 uart example.

Only none-debug version can be successfully modified.

Is there any other way I can provide information for you?

I may also made mistakes in pca10040 uart debug bootloader example modification that lead to unsuccessful.

Alien

RE: Short time dfu issues

Hieu — Mon, 15 Apr 2024 12:26:11 GMT

Hi Alien,

Can you use the debug project of the bootloader, enable the debug level logging, and acquire the log?

Hieu

RE: Short time dfu issues

alien — Mon, 15 Apr 2024 12:11:54 GMT

Hi Hieu,

I disabled HWFC in bootloder .

So DTR/RTS here is just used to simulate button press.

Like on PCA10056(nRF52840-dk), button 4 is used to enter dfu mode.

The voltage will be changed if you press it.

On my custom board. When serial is opened, DRT/RTS status can be easily changed through pyserial.

So no need to think about HWFC here. Thank you.

Alien

RE: Short time dfu issues

Hieu — Mon, 15 Apr 2024 12:01:45 GMT

Hi alien,

I am unfamiliar with Python, but does the serial functionality that you are using controls DTR/RTS by default? I don't see HWFC parameters in the serial.Serial() line.

Hieu