Hi, I find that heap3.c is used in the demo of AT91SAM9XE, but I can not successfully port FreeRTOS to AT91SAM9G20 with heap3.c in IAR. However, I have ported FreeRTOS to AT91SAM9G20 successfully with heap2.c. If I want to use heap3.c, what setting should I modify in IAR? Or what codes should I modify? Thanks for instructions! Regards

heap3 is the only heap option that does not use the configTOTALHEAP_SIZE configuration file setting, and instead uses the heap allocated by the IAR linker – which is set by editing the project options inside the Embedded Workbench IDE. If you are not sure how to set the heap size using the IAR tools then please refer to the compiler’s user guide/manual. http://www.freertos.org/a00111.html Regards.