External MCU flashing over BLE using nRF52840

RE: External MCU flashing over BLE using nRF52840

flogui — Tue, 02 Jul 2019 12:08:46 GMT

Yes probably. Thanks you for your help !

RE: External MCU flashing over BLE using nRF52840

awneil — Tue, 02 Jul 2019 12:06:02 GMT

Again, you probably need some "flow control" or "pacing" to manage the data throughput...

RE: External MCU flashing over BLE using nRF52840

flogui — Tue, 02 Jul 2019 11:52:49 GMT

I looked at it, solved my error report but I still does not receive all of my data

RE: External MCU flashing over BLE using nRF52840

awneil — Tue, 02 Jul 2019 08:41:07 GMT

Did you look at the post I linked?

RE: External MCU flashing over BLE using nRF52840

flogui — Tue, 02 Jul 2019 08:34:08 GMT

I found why there is not the same lines (the debug buffer was too small because I printed all the data).

Here is what I get now, in the debug terminal:

<info> app: Debug logging for UART over RTT started.

<debug> nrf_ble_gatt: Requesting to update ATT MTU to 247 bytes on connection 0x0.

<debug> nrf_ble_gatt: Updating data length to 251 on connection 0x0.

<info> app: Connected

<debug> nrf_ble_gatt: ATT MTU updated to 247 bytes on connection 0x0 (response).

<info> app: Data len is set to 0xF4(244)

<debug> app: ATT MTU exchange completed. central 0xF7 peripheral 0xF7

<debug> nrf_ble_gatt: Data length updated to 251 on connection 0x0.

<debug> nrf_ble_gatt: max_rx_octets: 27

<debug> nrf_ble_gatt: max_tx_octets: 251

<debug> nrf_ble_gatt: max_rx_time: 328

<debug> nrf_ble_gatt: max_tx_time: 2120

<debug> app: ATT MTU exchange completed. central 0xF7 peripheral 0xF7

<debug> app: PHY update request.

<debug> app: Ready to send data over BLE NUS

<debug> app: Ready to send data over BLE NUS

<debug> app: Ready to send data over BLE NUS

<debug> app: Ready to send data over BLE NUS

<error> app: ERROR 1 [NRF_ERROR_SVC_HANDLER_MISSING] at C:\Users\FLO\Desktop\nRF5_SDK_15.3.0_59ac345\examples\ble_peripheral\ble_app_uart\main.c:560

PC at: 0x0002ED67

<error> app: End of error report

RE: External MCU flashing over BLE using nRF52840

flogui — Tue, 02 Jul 2019 08:27:08 GMT

I tried to remake the error to re-send you the code but I don't have the same lines in the debug terminal besides the fact that I changed nothing.

I did chopped off one part of the error report but in the next picture I highlighted the line (it's in the main file, line 560).

RE: External MCU flashing over BLE using nRF52840

awneil — Tue, 02 Jul 2019 08:19:57 GMT

[quote userid="81078" url="~/f/nordic-q-a/49197/external-mcu-flashing-over-ble-using-nrf52840/195849"]I guess it's because I send too much data and too fast to the UART.[/quote]

Or too much too fast for the BLE link.

BLE = "Bluetooth Low Energy": so its focus is on minimising energy consumption - which means it is specifically not designed for high-volume and/or high-speed data transfer ...

[quote userid="81078" url="~/f/nordic-q-a/49197/external-mcu-flashing-over-ble-using-nrf52840/195849"]How can I solve this[/quote]

You will need some sort of flow control - or "pacing" - to regulate your data transmission.

RE: External MCU flashing over BLE using nRF52840

awneil — Tue, 02 Jul 2019 08:16:23 GMT

You have chopped off the part of the error report which shows where, exactly, the error was detected!

But check this:

https://devzone.nordicsemi.com/f/nordic-q-a/41480/multiperipheral-nus-crashes/161677#161677

How to properly post source code:

You can also post logs that way - just keep the 'language' as 'text'

RE: External MCU flashing over BLE using nRF52840

flogui — Tue, 02 Jul 2019 08:08:43 GMT

I have some problems making the Nordic Uart Service working.

I am trying to send a 2ko file but I get an ERROR 4 :

The line making the error is in the main function :

So I guess it's because I send too much data and too fast to the UART. How can I solve this error ?

RE: External MCU flashing over BLE using nRF52840

awneil — Mon, 01 Jul 2019 15:00:13 GMT

As far as BLE is concerned, it's just a matter of transferring the data - it makes no difference what that data represents.

You might want to start by looking at the Nordic UART Service (NUS) - that's good for transferring arbitrary chunks of data ...

infocenter.nordicsemi.com/.../ble_sdk_app_nus_eval.html

Or the Device Firmware Update (DFU) BLE Service:

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.0.0/group__nrf__dfu__ble.html

RE: External MCU flashing over BLE using nRF52840

flogui — Mon, 01 Jul 2019 14:44:52 GMT

Thanks that is going to be usefull but the part I am more interested in is the BLE part.

RE: External MCU flashing over BLE using nRF52840

awneil — Mon, 01 Jul 2019 14:35:21 GMT

ST have application notes on how to do in-system programming of their microcontrollers.

You need to study them, and implement what they show you.