GUI_SetBkColor(GUI_YELLOW);背景色总是默认的黑色而且不能显示字符，但是能画圈

int main(void){//===Ini tializationInitialization();//===Execute//LCD_Clear(YELLOW);GUI_SetBkColor(GUI_YELLOW);GUI_SetColor(GUI_WHITE);GUI_Clear();GUI_DrawCircle(100,100,120);GUI_DrawCircle(100,100,100);GUI_DrawCircle(100,100,0);//GUI_SetFont(&GUI_Font24B_ASCII);//GUI_DispStringAt("ABCD",100,100);//GUI_DispStringAt("caonimei",100,100);//===OS ExecuteOSInit();OSTaskCreate(start_task,(void *)0,(OS_STK *)&START_TASK_STK[START_STK_SIZE-1],START_TASK_PRIO );//???¨????????OSStart();}
void Initialization(void){delay_init(72);NVIC_Configuration(); uart_init(9600);LED_Init();
GUI_Init();//EBalance_Init();}