ble_thread_dyn_mtd_coap_cli_pca10056_s140 with 2 UARTES

[Andre]

Hello

I would like to use both UARTES in the exemple "ble_thread_dyn_mtd_coap_cli_pca10056_s140". 

I tried to adapt this example using the example "nRF5_SDK_for_Thread_and_Zigbee_v4.0.0_dc7186b \ examples \ peripheral \ serial_uartes" but I have link problems with libraries that are in common between my program and the SoftDevice ...

How can I fix it?

Thank you

[Jørgen Holmefjord]

Hi,

The OpenThread libraries are by default built with support for UART (for NCP and CLI). If you want to use UART0 for another purpose, you need to build the libraries without UART. These steps should work:

1. Start with a fresh copy of the SDK, and make sure you place it as close to the ROOT of the hard drive as possible.
2. Modify the file in external\openthread\project\nrf52840\openthread_nrf52840\softdevice\uart\armgcc\Makefile and comment out/remove all lines involving UART:
   1. #  $(PROJ_DIR)/../openthread/examples/platforms/nrf528xx/src/uart.c \
   2. #CFLAGS += -DOPENTHREAD_CONFIG_NCP_UART_ENABLE=1
   3. #CFLAGS += -DUART_AS_SERIAL_TRANSPORT=1
   4. #ASMFLAGS += -DOPENTHREAD_CONFIG_NCP_UART_ENABLE=1
   5. #ASMFLAGS += -DUART_AS_SERIAL_TRANSPORT=1
3. Open command line and go to [nRF5 SDK for Thread and Zigbee v4.0.0 ROOT]\external\openthread\project.
4. Enter the following commands:
   

   git clone https://github.com/openthread/openthread.git
   cd openthread
   git checkout 8a1992e2e42fb707babe9491a6a1456e553490e8
   cd ..
   make -C nrf52840\openthread_nrf52840\softdevice\uart\armgcc

5. Open the SES project. Under directory 'OpenThread' in the project browser, remove the file named 'libopenthread-nrf52840-softdevice-sdk.a'.
6. Add the file external\openthread\project\nrf52840\openthread_nrf52840\softdevice\uart\armgcc\libopenthread-nrf52840-softdevice-sdk.a to the project.
7. Remove the following preprocessor symbols in the SES project settings:
   1. CFLAGS += -DNRFX_PRS_ENABLED=0
   2. CFLAGS += -DUART0_ENABLED=0
   3. CFLAGS += -DUART1_ENABLED=1

Best regards,
Jørgen

[Jørgen Holmefjord]

The error seems to come from the file you should remove in step 5. Did you remove it and add the newly built file?

[Jørgen Holmefjord]

Are you sure you get the same issue? I tested the solution with your project, and I do not get the hardfault when moving log_init() before uart_init(). However, I did get other errors from the UART initialization.

[Andre]

In reality, I rather have these errors:

[Andre]

If I use the DMA mode on UARTE1, I have no errors...

Now it's compile but I have an error if I write on UARTE1:

Do you explain me what is this error ?

Thank you

[Jørgen Holmefjord]

Are you trying to send a const buffer or a passing a text string directly to the function? When the peripheral uses EasyDMA, the data needs to be placed in RAM. Const buffers will be placed in the flash, making it not possible for the UARTE peripheral to access the data. Make sure you create a non-const buffer and pass a pointer to this to the transfer function.

[Andre]

You are right ^^

Everything works now :)

Thanks you very much for your help