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debug_freertos [2016/01/29 11:18] – [Openocd rtos awareness] superstagedebug_freertos [2018/05/22 10:33] (current) – external edit 127.0.0.1
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 +====== Debug Freertos ======
 +===== vTaskList =====
  
 +To display the list of tasks states :
 +<code c>
 +//Approximately 40 bytes per task should be sufficient
 +char buffer[400];
 +vTaskList(buffer);
 +/* example of output */
 +
 +// Name     State  Priority  Stack  Num
 +//*************************************
 +// CANAPP   R      2         178    3
 +// DBG      R      1         42     1
 +// IDLE     R      0         116    5
 +// LED      B      1         238    4
 +// MCTRL    B      4         202    2
 +</code>
 +[[http://www.freertos.org/a00021.html#vTaskList|For more information]].
 +
 +===== configASSERT =====
 +Enable you to check your config with a debugger.
 +<code c>
 +/* Define configASSERT() to disable interrupts and sit in a loop. */
 +#define configASSERT(x)     if( ( x ) == 0 ) { taskDISABLE_INTERRUPTS(); for( ;; ); }
 +</code>
 +
 +[[http://www.freertos.org/a00110.html#configASSERT|For more information]].
 +===== Openocd rtos awareness =====
 +
 +Openocd is able to give you information about your system's tasks. For example, for the QuimDC we have added :
 +<code shell>
 +$_TARGETNAME configure -rtos auto
 +</code>
 +to "common/make/quimesis_stm32f10x.cfg".
 +
 +
 +
 +You must also add [[https://github.com/arduino/OpenOCD/blob/master/contrib/rtos-helpers/FreeRTOS-openocd.c|OpenOCD/contrib/rtos-helpers/FreeRTOS-openocd.c]] to your project and this line :
 +<code shell>
 +LDFLAGS += -Wl,--undefined=uxTopUsedPriority
 +</code>
 +when using gcc as specified in "common/lib/freertos/FreeRTOS-openocd.c"
 +
 +[[http://openocd.org/doc/html/GDB-and-OpenOCD.html|For more information]].
 +===== Hook Functions and Trace Hook Macros =====
 +  * [[http://www.freertos.org/a00016.html|Hook Functions Documentation]]
 +  * [[http://www.freertos.org/rtos-trace-macros.html|Trace Hook Macros Documentation]]
 +
 +
 +===== Remove compiler optimization =====
 +
 +To remove the compiler optimization step for debugging add **-O0** to all the compile commands. You can also add **virtual** to some variable to be able to see their value in the debugger.