Uart Issue about immigration from SDK14.2 to SDK15

[leejh]

Hello, Nordic

I have to immigrate from SDK14.2 to SDK15. I know that many things have changed in the process.

I'm referring to the Immigration guide but, There is UART issue,

For now, I have to configure communication with BLE device(nRF52840) and GPS module with UART.

In SDK 14.2, UART was able to receive GPS data in real time.

But, In SDK 15, when BLE device is connected GPS module, it return error message below.

I have tested both  ble_app_uart and peripheral/uart example.

In SDK 15, They return the same error.

But, In SDK 14.2, There are no errors.

I think only difference of SDK 14.2 and SDK 15 is nrfx_uart.

After setting a break point and testing, an error is returned like in the below.

[error message]

In which cases will these errors be returned?

Please let me know.

Thanks.

ps. currently using

• PCA10056 (nRF52840)
• SDK 15
• Segger Embedded Studio
• GPS module with UART

[Jørgen Holmefjord]

I can't see any error codes in your last image, and in your first image the error seems to originate from the uart_handler, not the init function. Can you please provide the correct error code causing the application to end up in the error handler?

[leejh]

This is Error code --> NRF_ERROR_NO_MEM (0x0004).

And main.c 409 --> err_code = nrf_sdh_ble_enable(&ram_start).

I have changed Ram Start but same issue was looped.

[leejh]

Hello, Jørgen Holmefjord.

I have changed both Ram Start and Ram Size. So, nrF_sdh_ble_enable error was solution.

But, Same Error (Error 0x0004 NO_MEM) was looped in the APP_UART_COMMUNICATION_ERROR : APP_ERROR_HANDLER (main.c 150)

[Jørgen Holmefjord]

The error you are receiving in the APP_UART callback, which is passed to the error handler, is not the same error codes as the global errors. The error code refer to the ERRORSRC register in the UART peripheral. 0x0004 means a FRAMING error is detected.

[leejh]

Thank you for your reply.

It's solved. The error a 0x0004 was solved by changing baudrate, Ram size and Ram start.

After then, Error code 0x0001 (SRV_HANDLE....Error) was appeared.

I don't know exactly error cause but, It was solved by removing the printf function. Thanks.

[Jørgen Holmefjord]

Great that you fixed it. If you solved it by removing printf, it could be some error with the uart functions, or with STDIO retarget functions.