Adding UART code to the 'light switch server' project

[Paul Mercer]

Hi,

I am evaluating the nRF52840-DK and wanted to add some debug code to the UART.

I have used the same libraries as the 'UART_PCA10056 (which works), but when the code is linked an error comes as follows:-

Please advise where to look at for this error.

[Hung Bui]

Hi Paul, 
It's complaining that the UART0 interrupt handler was defined twice. 
Could you do a full search (Ctrl+Shift+F) and look for "UARTE0_UART0_IRQHandler" ?
Note that in nrf51_to_nrf52.h file we have a define     #define UART0_IRQHandler        UARTE0_UART0_IRQHandler 
So if there is a define of UART0_IRQHandler function somewhere else then we will also have a multiple definition. 

Note that in mesh SDK we also have a serial library called serial_uart.c that you may use. 

[Paul Mercer]

I have done a search and there are 3 instances in the project and all in the same file. I have done a search for other IRQ's and they come back with 3 hits as well.

[Paul Mercer]

Do you have any example code of using the serial_uart.c and functions?

[Hung Bui]

You can find the usage of the serial_uart.c library in the serial example in mesh SDK. However the use of this module in the example is not for logging but for serialization of mesh stack. 

There must be a define of UARTE0_UART0_IRQHandler inside nrfx_irqs_nrf52832.h if the file was included. 

[Paul Mercer]

Thanks that has sorted that out.

One more question though. I am getting the serial information in the debug window, but want it to come out on the virtual serial port the same as project 'uart_pca10056'. What do I change to make this happen?

[Hung Bui]

You would need to modify the log.c to add log callback for uart instead of rtt. Then modify main.c to call __LOG_INIT with the callback to uart.