How can i use printf() or System_printf() in cc2650 sensor tag to print the values on the console and debug sensor tag code

Hi Zaed, 

Yes, you can use Sysbem_printf() to print to the console in TI-RTOS applications.  I would recommend using SysMin as your system provider.  To do so, just add/update the following to the *.cfg file:

/* ================ System configuration ================ */
var SysMin = xdc.useModule('xdc.runtime.SysMin');
System.SupportProxy = SysMin;

Now you can add System_printf() calls to your code to print to an internal buffer and System_flush() to print out to the console.

Regards,

-- Emmanuel

Hello experts,

I'm trying to add debug logging with printf to the CC2650STK SensorTag default app and have followed instructions given by you.

I didn't get any log output.

Then I tried with the uartecho_CC2650STK_TI_CC2650F128 default project, and I get the printf messages from that in the CCS console. I've tried to figure out what the difference is and have concluded that I need to add/initialize the UART.

In main.c of the SensorTag default app, I added:

#include <xdc/std.h>
#include <xdc/runtime/System.h>
#include <ti/drivers/UART.h>

...and changed the main function like this (just added the UART_init(); call, see below)

int main()
{
PIN_init(BoardGpioInitTable);

#ifndef POWER_SAVING
/* Set constraints for Standby and Idle mode */
Power_setConstraint(Power_SB_DISALLOW);
Power_setConstraint(Power_IDLE_PD_DISALLOW);
#endif // POWER_SAVING

/* Initialize ICall module */
ICall_init();

/* Start tasks of external images - Priority 5 */
ICall_createRemoteTasks();

/* Kick off profile - Priority 3 */
GAPRole_createTask();

/* Kick off application - Priority 1 */
SensorTag_createTask();
SensorTagTmp_createTask();
SensorTagHum_createTask();
SensorTagBar_createTask();

//added by me:
UART_init();

BIOS_start(); /* enable interrupts and start SYS/BIOS */

System_printf("Hello World :)");
System_flush();

return 0;
}


The problem is that I get this linker error:

undefined first referenced
symbol in file
—------- —------------—
UART_init ./Startup/main.obj

error #10234-D: unresolved symbols remain
error #10010: errors encountered during linking; "SensorTag.out" not built

» Compilation failure
gmake: *** [SensorTag.out] Error 1
gmake: Target `all' not remade because of errors.

**** Build Finished ****

I'm I on the right path to get this working? What do I need to do to solve the problem?

Your help will be appreciated, cheers,

Florian

Can you start a new thread? Since this thread is marked as "Answered", it goes into a different bucket.

Thanks, Todd. That's what I did: e2e.ti.com/.../492622