add BearPi STemWin test demo

examples/stemwin_gui_demo/tos_stemwin_gui_test_demo.c

@@ -0,0 +1,62 @@
+#include "cmsis_os.h"
+#include "GUI.h"
+
+#define GUI_TASK_STK_SIZE          1500
+void gui_task(void *arg);
+osThreadDef(gui_task, osPriorityNormal, 1, GUI_TASK_STK_SIZE);
+
+void gui_test_demo(void)
+{
+    GUI_Init();
+    GUI_SetBkColor(GUI_BLUE);
+    GUI_Clear();
+    GUI_CURSOR_Show();
+    GUI_SetColor(GUI_WHITE);
+    GUI_SetFont(GUI_FONT_24B_1);
+    GUI_RECT rect ;
+    rect.x0 = 0 ;
+    rect.y0 = 0 ;
+    rect.x1 = 239 ;
+    rect.y1 = rect.y0 + 24 ;
+    GUI_DispStringInRectWrap("STemWin", &rect, GUI_TA_HCENTER | GUI_TA_VCENTER, GUI_WRAPMODE_NONE);
+
+    GUI_RECT rect1 ;
+    rect1.x0 = 0 ;
+    rect1.y0 = 30 ;
+    rect1.x1 = 239 ;
+    rect1.y1 = rect1.y0 + 24 ;
+    GUI_DispStringInRectWrap("Use TencentOS tiny", &rect1, GUI_TA_HCENTER | GUI_TA_VCENTER, GUI_WRAPMODE_NONE);
+
+    GUI_RECT rect2 ;
+    rect2.x0 = 0 ;
+    rect2.y0 = 60 ;
+    rect2.x1 = 239 ;
+    rect2.y1 = rect2.y0 + 24 ;
+    GUI_DispStringInRectWrap("STemWin Ver:", &rect2, GUI_TA_HCENTER | GUI_TA_VCENTER, GUI_WRAPMODE_NONE);
+
+    GUI_RECT rect3 ;
+    rect3.x0 = 0 ;
+    rect3.y0 = 90 ;
+    rect3.x1 = 239 ;
+    rect3.y1 = rect3.y0 + 24 ;
+    const char *str = GUI_GetVersionString();
+    GUI_DispStringInRectWrap(str, &rect3, GUI_TA_HCENTER | GUI_TA_VCENTER, GUI_WRAPMODE_NONE);
+}
+
+void gui_task(void *arg)
+{
+    __HAL_RCC_CRC_CLK_ENABLE();
+    gui_test_demo();
+
+    while (1)
+    {
+        GUI_Delay(100);
+    }
+}
+
+
+void application_entry(void *arg)
+{
+    printf("***create stemwin gui task\r\n");
+    osThreadCreate(osThread(gui_task), NULL); // Create task1
+}