Hy, I’m trying to implement FreeRTOS V9.0.0 example 13 from “161204MasteringtheFreeRTOSRealTimeKernel-AHands-OnTutorial_Guide”, I’ve modified it a little bit because my target environment is TMS570 on TMDX570LC43HDK board, this is my configuration regarding timers:

define configUSE_TIMERS 1

define configTIMERTASKPRIORITY ( 5 )

define configTIMERQUEUELENGTH 5

define configTIMERTASKSTACK_DEPTH ( 100 )

the problem is that during compiling I’ve the error:

 undefined              first referenced                     
  symbol                    in file                          
 ---------              ----------------                     
 MPU_xTimerCreate       ./source/Main.obj                    
 xTimerPendFunctionCall ./HalCoGen/source/os_mpu_wrappers.obj

how can I solve such kind of compilation problems? The main code is the following:

---

include “HL_sci.h”

include “HL_gio.h”

include “HLreghet.h”

include “FreeRTOS.h”

include “os_projdefs.h”

include “os_task.h”

include “string.h”

include “stdlib.h”

include “Misc.h”

include “os_queue.h”

include “os_timer.h”

/* The periods assigned to the one-shot and auto-reload timers respectively. */

define mainONESHOTTIMERPERIOD ( pdMSTO_TICKS( 3333UL ) )

define mainAUTORELOADTIMERPERIOD ( pdMSTO_TICKS( 500UL ) )

/———————————————————–/ /* * The callback functions used by the one-shot and auto-reload timers * respectively. */ static void prvOneShotTimerCallback( TimerHandle_t xTimer ); static void prvAutoReloadTimerCallback( TimerHandle_t xTimer ); void Main_Main() { sciInit(); gioInit();

TimerHandle_t xAutoReloadTimer, xOneShotTimer;
BaseType_t xTimer1Started, xTimer2Started;

xOneShotTimer = xTimerCreate( "OneShot",                    
                              mainONE_SHOT_TIMER_PERIOD,    
                              pdFALSE,                      
                              0,                            
                              prvOneShotTimerCallback );    

xAutoReloadTimer = xTimerCreate( "AutoReload",                  
                                 mainAUTO_RELOAD_TIMER_PERIOD,  
                                 pdTRUE,                        
                                 0,                             
                                 prvAutoReloadTimerCallback );  

/* Check the timers were created. */
if( ( xOneShotTimer != NULL ) && ( xAutoReloadTimer != NULL ) )
{
    xTimer1Started = xTimerStart( xOneShotTimer, 0 );
    xTimer2Started = xTimerStart( xAutoReloadTimer, 0 );
    if( ( xTimer1Started == pdPASS ) && ( xTimer2Started == pdPASS ) )
    {
        vTaskStartScheduler();
    }
}
for( ;; );
return 0;

} /———————————————————–/ static void prvOneShotTimerCallback( TimerHandlet xTimer ) { static TickTypet xTimeNow; xTimeNow = xTaskGetTickCount(); PutH32( xTimeNow ); } /———————————————————–/ static void prvAutoReloadTimerCallback( TimerHandlet xTimer ) { static TickTypet xTimeNow; xTimeNow = xTaskGetTickCount(); PutH32( xTimeNow ); } /———————————————————–/ Thanks for your help,
Antonio

osmpuwrappers is not a file we provide for the Cortex-R port, I think this is an extension provided by TI themselves, so I don’t know where the missing symbol MPU_xTimerCreate() will be. xTimerPendFunctionCall() is in FreeRTOS/source/timers.c. As can be seen on line 1057 here: https://sourceforge.net/p/freertos/code/HEAD/tree/tags/V9.0.0/FreeRTOS/Source/timers.c INCLUDE_xTimerPendFunctionCall must be set to 1 in FreeRTOSConfig.h for it to be available.

Hy, thanks for your answer, it solves one of the error, I’ve no more: xTimerPendFunctionCall ./HalCoGen/source/osmpuwrappers.obj but I’ve again the error:

 undefined              first referenced                     
  symbol                    in file                          
 ---------              ----------------                     
 MPU_xTimerCreate       ./source/Main.obj  

I’ve tried also to substitute timer.c and timer.h in ostimers.c and ostimers.h but it doesn’t solve the problem. Any idea about how to solve it? Thanks, Antonio

Like I said, that part is not our code, so other that stating the obvious and suggesting that you Greg the files to find where it is defined, I’m afraid I don’t know. If that is TI code, did you ask on the TI forum?