ucgui3.9移植用的原子哥的旗舰3.5寸屏开发板LCD背景不变的是为什么？

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//mian.c#include "delay.h"#include "sys.h"#include "gui.h"#include "lcduser.h"#include "usart.h" int main(void) { delay_init(); NVIC_Configura tion(); uart_init(9600); GUI_Init(); GUI_SetFont(&GUI_Font24B_ASCII);GUI_SetBkColor(GUI_BLUE);GUI_SetColor(GUI_YELLOW);GUI_Clear(); GUI_DispStringAt("ABCDefg",100,100);GUI_DispStringAt("aabbbbbb",200,200); while(1) ;}//LCDconf.h #ifndef LCDCONF_H#define LCDCONF_H#define LCD_XSIZE (320)/* 320 -> 400 */#define LCD_YSIZE (480)/* 240 */#define LCD_CONTROLLER (-1)/* 9320 -> 5420 */#define LCD_BITSPERPIXEL (16)#define LCD_FIXEDPALETTE (565)#define LCD_SWAP_RB (1) //#define LCD_SWAP_XY (1)//LCD_MIRROR_X#define LCD_INIT_CONTROLLER() LCDUSER_Init()#endif /* LCDCONF_H *///guiconf.h#ifndef GUICONF_H#define GUICONF_H#define GUI_OS (0) /* Compile with multitasking support */#define GUI_SUPPORT_TOUCH (0) /* Support a touch screen (req. win-manager) */#define GUI_SUPPORT_UNICODE (0) /* Support mixed ASCII/UNICODE strings */#define GUI_DEFAULT_FONT &GUI_Font6x8#define GUI_ALLOC_SIZE 1024*10 /* Size of dynamic memory ... For WM and memory devices*//*********************************************************************** Configuration of available packages*/#define GUI_WINSUPPORT 0 /* Window manager package available */#define GUI_SUPPORT_MEMDEV 0 /* Memory devices available */#define GUI_SUPPORT_AA 0 /* Anti aliasing available */#endif /* Avoid multiple inclusion *///LCDNull.cvoid LCD_L0_DrawHLine(int x0, int y, int x1) {LCD_DrawLine(x0, y, x1, y);}void LCD_L0_DrawVLine(int x, int y0, int y1) {LCD_DrawLine(x, y0, x, y0);}void LCD_L0_FillRect(int x0, int y0, int x1, int y1) { #if !LCD_SWAP_XY for (; y0 <= y1; y0++) { LCD_L0_DrawHLine(x0,y0, x1); }#else for (; x0 <= x1; x0++) { LCD_L0_DrawVLine(x0,y0, y1); }#endif}int LCD_L0_Init(void) {LCDUSER_Init(); return 0;}void LCD_L0_SetPixelIndex(int x, int y, int PixelIndex) {LCD_SetPoint(x,y,PixelIndex);}unsigned int LCD_L0_GetPixelIndex(int x, int y) //??????????{return LCD_ReadPoint(x,y); }