On RTT Viewer log value

[Inspectron]

I would like to log the adc value on the RTT Viewer.

uint16_t adc_result; This is the variable, which I would like to log.

So after the measuring I call:

SEGGER_RTT_WriteString(0, adc_value);

This will throw an error, because the second parameter has to be a string.

SEGGER_RTT_WriteString is not a standard function, so it wont be able to add more parameters for converting the int to string.

So how I have to set up the secon parameter, if I want log adc_value?

Ok, from the tutorial I know, that I have to use SEGGER_RTT_printf().

But when I remove retarget,c file and uncheck use MicroLIB then my program wont work anymore.

It will build with success. But when I load the program on the chip, it wont work. If I add retarget.c file and check use MicroLIB then it will work again.

[MartinBL]

Hi. Have a look at this tutorial: Debugging with Real Time Terminal. It shows you how to use SEGGER_RTT_printf() to print strings and various different parameters.

[Inspectron]

SEGGER_RTT_printf(0, "variable value: %d\n", variable);

where the first parameter specifies that the output should be printed to Terminal 0 in the J-Link RTT Viewer, second parameter is the string to print, and the value of "variable" is inserted for "%d"

I found it. Thank you

[Inspectron]

My application doesnt work anymore, since i removed retarget.c

[MartinBL]

More details please? "Doesn't work" doesn't tell us much. My application works fine without retarget.c and with RTT printf.

[Inspectron]

Well, I can build the project without any error or warnings. But the program will not run anymore. With not run, I mean the DK wont be visible anymore and the outputs wont be controled trough the switch. And debugging is also not possible.