nrf52832 Serial UART input example

[Ivan]

Hello.

I use nrf52832 on Adafruit Feather board among with nrf5 SDK.
As a default I can log any info via NRF_LOG_DEBUG to my serial monitor.

But how can I use Serial input to send some data to app via same serial UART?
Are there any example in SDK to read from UART on app SDK level.
(I use ESB low-power TX/RX examples from Proprietary RF).

Kind regards.

Ivan.

[tBStar]

I am using printf() without any issues. Assuming you enabled all of the UART related macros in sdk_config file: (UART instances, UART peripheral driver, EasyDMA, UART Config Log, UART RX/TX Pins, etc...).

If you're having problem understanding, your best course of action is to open existing UART examples and play with them until you get it.

Now to answer your question, you'll probably have to enable RETARGET_ENABLED. If you go this route and you are successful in sending data through, then you might want to add this too you Makefile file to enable printing floats:

# Linker flags

LDFLAGS += $(OPT)

.

.

.

LDFLAGS += -u _printf_float

Hope this helps,

Cheers

[Ivan]

Output debug works no problem.

I only mean some terminal input parse (i need to input some commands via serial and get responce to them in main application of my ESB example).
like "app_uart_read" but to get access to it from ESB examples, cause app. can't find UART low level functions to read byte(couple of bytes).

I think I need reimplement this handler in my app, right?

uint8_t dataArray[MSG_LEN] = {0};

void uart_event_handle(app_uart_evt_t * p_event)
{
    static uint8_t index = 0;

    switch (p_event->evt_type)
    {
        case APP_UART_DATA_READY:
            app_uart_get(&dataArray[index]);
            index++;
            
            if (index == MSG_LEN) {
                index = 0;
                
                //data ready
            }
            
            break;

        default:
            break;
    }
}

//do smth with @dataArray

And what I need to include to get this work?

[tBStar]

I am not familiar with ESB examples but I suspect it will be trial and error. Try to add the app_uart header file to your project. Initialize the UART module and add your event handler. You'll have to play with it it as I believe it's possible since ESB and UART operate independently.

Hope this helps.