Hi,

I try to run some basic example for stemwin with freertos but get hard faults. I took BasicHelloWorld example and added freertos to it (with cube wrapper for OS). I am able to run single task with stemwin: task initializes gui, lcd is configured correctly. Everything works if I simply display text on screen (i.e. I use GUI_DispDecAt()) - the task includes while(1) loop which increments counter which is displayed on screen - the display is updated correctly - I can see incremented values of the counter on screen. Now if I use some Window manager stuff the thing stops working:

hButton = BUTTON_CreateEx(10, 50, 219, 30, 0, WM_CF_SHOW, 0, GUI_ID_BUTTON0);

BUTTON_SetText(hButton, "EHLO");

BUTTON_SetFont(hButton, &GUI_Font8x15B_ASCII);


if(GUI_Exec() != 0) {

BSP_LED_Toggle(LED4);


here I added a button, it is displayed GUI_Exec returns != 0, but next time I call GUI_Delay() it never returns and the task hangs, last message from debugger is
101 in ..\..\..\..\..\Utilities\Third_Party\STemWin526_20150226\GUI\Core/GUI_Time.c

but unfortunatelly I have no access to source to debug it further. Could anyone comment on this?

Thank you for the response. The timing functions are OK. Just as feedback for someone who may search for similiar issue: it appears the stack size for the task was to small, after increasing the stack size gui thread works as expected.