Help with tasks

Posted by dthif1980 on March 12, 2009

Hi, I’m quite new to the FreeRTOS world and I’m trying to build a application using it. Platform: AVR32 (using AVR32 Studio) Framework: AT32UC3A-1.4.0 Language: GNUC++ At the moment, I’m just trying to make the tasks work. I double checked eveything with the Atmel EVK1100 ControlPanel application that uses FreeRTOS and everything seems fine, but I always end up having the same problem… My application is quite simple. Here is a code sample: Note that: configCPU_CLOCK_HZ == CP_CPU_SPEED == 48000000 and configPBA_CLOCK_HZ == CP_PBA_SPEED == 12000000 -——————————– Main.cpp File —————————————- //======================================================================================= // Main // Main function. Starts the different tasks and wait forever. //======================================================================================= int main(void) { int bRet = FALSE; CBDR29010 obj; /* Primary Initialization. ————————– */ // Switch the main clock to OSC0. pm_switch_to_osc0(&AVR32_PM, FOSC0, OSC0_STARTUP); // Initialize the delay driver. delay_init(CP_CPU_SPEED); // Init Clocks. LocalStartPLL66MHZ(); // Start the tasks. obj.Activate(); // Start the OS. It should never return from there. vTaskStartScheduler(); return 0; } -——————————– BDR29010.cpp File —————————————- // Constants ////////////////////////////////////////////////////////////////////////////// #define TASK_COMM_MANAGER_PRIORITY (tskIDLE_PRIORITY + 1) #define TASK_COMM_MANAGER_STACK_SIZE 1024 #define TASK_COMM_MANAGER_DELAY 10 // Prototypes ////////////////////////////////////////////////////////////////////////////// portTASK_FUNCTION_PROTO(CommManagerTask, pParams); //======================================================================================= // CBDR29010::Activate //======================================================================================= bool CBDR29010::Activate() { bool bRet = false; int taskCreateRet = pdFAIL; xTaskHandle createdTaskHdl = NULL; taskCreateRet = xTaskCreate(CommManagerTask, (const signed portCHAR*) "COMM_MGR", TASK_COMM_MANAGER_STACK_SIZE, (void*)this, TASK_COMM_MANAGER_PRIORITY, &createdTaskHdl); if(taskCreateRet == pdPASS) { bRet = true; } else { bRet = false; } return bRet; } //======================================================================================= // TASK: ManagerCommTask //======================================================================================= portTASK_FUNCTION_PROTO(CommManagerTask, pParams) { do { vTaskDelay(TASK_COMM_MANAGER_DELAY); int allo = 1; } while (1); } I trace the execution of the task. It enters correctly, calls the vTaskDelay(…) function but never returns from there. If I pause the execution, I get this "No source available for "_handle_Supervisor_Call() " " Checking the stack, it looks like it hangs just after the "portEXIT_CRITICAL();" call of the xTaskResumeAll() function in task.c. Here is a copy of my FreeRTOSConfig.h file: #define configUSE_MUTEXES 1 #define configUSE_PREEMPTION 1 #define configUSE_IDLE_HOOK 0 #define configUSE_TICK_HOOK 0 #define configCPU_CLOCK_HZ ( CP_CPU_SPEED ) /* Hz clk gen */ #define configPBA_CLOCK_HZ ( CP_PBA_SPEED ) #define configTICK_RATE_HZ ( ( portTickType ) 1000 ) #define configMAX_PRIORITIES ( ( unsigned portBASE_TYPE ) 8 ) #define configMINIMAL_STACK_SIZE ( ( unsigned portSHORT ) 256 ) /* configTOTAL_HEAP_SIZE is not used when heap_3.c is used. */ #define configTOTAL_HEAP_SIZE ( ( size_t ) ( 1024*25 ) ) #define configMAX_TASK_NAME_LEN ( 20 ) #define configUSE_TRACE_FACILITY 0 #define configUSE_16_BIT_TICKS 0 #define configIDLE_SHOULD_YIELD 1 #define configUSE_CO_ROUTINES 0 #define configMAX_CO_ROUTINE_PRIORITIES ( 0 ) #define INCLUDE_vTaskPrioritySet 1 #define INCLUDE_uxTaskPriorityGet 1 #define INCLUDE_vTaskDelete 1 #define INCLUDE_vTaskCleanUpResources 0 #define INCLUDE_vTaskSuspend 1 #define INCLUDE_vTaskDelayUntil 1 #define INCLUDE_vTaskDelay 1 #define INCLUDE_xTaskGetCurrentTaskHandle 1 #define INCLUDE_xTaskGetSchedulerState 0 #define configTICK_USE_TC 0 #define configTICK_TC_CHANNEL 2 #define configHEAP_INIT 1 I have no idea if those settings are ok, but I presume they are since I based myself on a working application of the Atmel framework. But I suspect that I am missing some configuration to make this work… Please, if you have any insight or suggestions, let me know. Best regards, Downy

Help with tasks

Posted by davedoors on March 13, 2009

Can you confirm that the tick interrupt is working? If the tick is not incrementing time then your block time will never time out after calling vTaskDelay() and the task will remain blocked.