ble_uart and saadc merge config file messed up. Device not advertising

RE: ble_uart and saadc merge config file messed up. Device not advertising

Tormod123 — Fri, 06 Mar 2020 16:59:56 GMT

Thank you for the help Jørgen.

I will try this later. For now have a great weekend!

RE: ble_uart and saadc merge config file messed up. Device not advertising

Jørgen Holmefjord — Fri, 06 Mar 2020 16:45:15 GMT

Have you tried to set a breakpoint in the saadc_callback function, to see if this gets called? I ran your code, and it seems like this is called, but the RTT Viewer if filled with the same log-message over and over again. You can also try to replace the calls to NRF_LOG_INFO in saadc_callback with printf, to see if you get the SAADC samples output on the UART terminal.

RE: ble_uart and saadc merge config file messed up. Device not advertising

Tormod123 — Fri, 06 Mar 2020 16:25:51 GMT

Ok, thank you.

Do you have any tips where I should now continue to fix my code to read from the potentiometer? Bare in mind that the code from the SAADC have just been copied over into the ble_uart example.

RE: ble_uart and saadc merge config file messed up. Device not advertising

Jørgen Holmefjord — Fri, 06 Mar 2020 16:09:44 GMT

There is a branch for SDK 15.2.0 migration. I intended to link directly to that, but I forgot. I have now updated the link. There should not be much changes from SDK 15.2.0 to SDK 15.3.0, but there may be some changes up to SDK 16.0.0. Most likely you can proceed with the project you have created yourself now, since you most likely may face similar issues if you try to port the GitHub example.

RE: ble_uart and saadc merge config file messed up. Device not advertising

Tormod123 — Fri, 06 Mar 2020 16:06:44 GMT

Hi Jørgen,

Disabling the nrf_log_backend_uart seemed to work. The device now actually advertises, however the device does not read and print out values from the potentiometer.

I have seen that example you linked before but have steered away from using it exactly because it was not updated to the latest SDK version. How would I go about using the combined example considering its not updated?

RE: ble_uart and saadc merge config file messed up. Device not advertising

Jørgen Holmefjord — Fri, 06 Mar 2020 15:47:29 GMT

Hi,

First of all, you should not call printf() before you initialize UART. The printf-function is redirected to app_uart module to transfer strings over UART. If you call printf before app_uart is initialized, you may experience errors.

Secondly, you cannot initialize the UART backend for the logger module, after you have initialized app_uart. These will by default use the same UART instance, causing an error to be returned. You disable this in your sdk_config.h file like this:

// <e> NRF_LOG_BACKEND_UART_ENABLED - nrf_log_backend_uart - Log UART backend
//==========================================================
#ifndef NRF_LOG_BACKEND_UART_ENABLED
#define NRF_LOG_BACKEND_UART_ENABLED 0
#endif

If you are interested, there is already an example that combines ble_app_uart with SAADC on our GitHub, but this has not yet been updated to the latest SDK versions.

Best regards,
Jørgen

RE: ble_uart and saadc merge config file messed up. Device not advertising

Tormod123 — Fri, 06 Mar 2020 12:54:05 GMT

devzone.nordicsemi.com/.../8446.ble_5F00_app_5F00_uart.zip

Here is the project