Hi all, I am having trouble starting more than 3 tasks even if they’re absolute dummy tasks. I’ve built a project with STM32CubeMX which included freeRTOS as middleware. IDE: Atollic TrueSTUDIO with GCC MCU: STM32151LCBU6 main.c: xTaskCreate(DataHandlerTask,”Data Handler”, 280U, NULL, 4U, NULL); xTaskCreate(LightMeasureTask,”Light Measurement”, 100U, NULL, 4U, NULL); xTaskCreate(TemperatureMeasureTask,”Temp Measurement”, 100U, NULL, 4U, NULL); xTaskCreate(HumidityMeasureTask,”Humid Measurement”, 100U, NULL, 4U, NULL); xTaskCreate(PressureMeasureTask,”Pressure Measurement”, 100U, NULL, 4U, NULL); vTaskStartScheduler(); tasks (there are 5 identically simple tasks): void HumidityMeasureTask(void pvargs){ int32t humidityValue=0; for (;;) { osDelay(HUMIDITYTASKDELAYMS); } } xTaskCreate returns in every case 1. After it gets stuck in vTaskStartScheduler() and does nothing. If I create only 3 tasks everything works fine. However, if there are more than 3 tasks the scheduler is getting stuck. Is there a define for maximum tasks or something? Any suggestions on how to get this working would be greatly appreciated. Peter Maier

Please read the heap management page on the FreeRTOS web site – could it be you just need to increase configTOTALHEAPSIZE? Do you have a malloc failed hook defined? Do you have configASSERT() defined?

To increase configTOTALHEAPSIZE worked fine. You made my day, thank you