diff --git a/src/config/user_config.h b/src/config/user_config.h
index 3c5e950..c845c15 100644
--- a/src/config/user_config.h
+++ b/src/config/user_config.h
@@ -55,7 +55,7 @@
  ****************************************************************************************
  */
 
-#define EPD_VERSION 0xA50f0004
+#define EPD_VERSION 0xA50f0005
 
 
 /*
diff --git a/src/epd/epd.c b/src/epd/epd.c
index 56e79a8..0fa4d1f 100644
--- a/src/epd/epd.c
+++ b/src/epd/epd.c
@@ -11,6 +11,7 @@ int scr_h;
 int scr_mode;
 int line_bytes;
 int scr_padding;
+int update_mode;
 
 
 // 窗口参数
@@ -89,7 +90,7 @@ void epd_pos(int x, int y)
 	epd_data(y>>8);
 }
 
-u8 lut[80] = {
+u8 lut_fast[80] = {
 //  RP0   RP1   RP2   RP3   RP4   RP5   RP6
     0x80, 0x60, 0x40, 0x00, 0x00, 0x00, 0x00,  // LUT0
     0x10, 0x60, 0x20, 0x00, 0x00, 0x00, 0x00,  // LUT1
@@ -110,16 +111,19 @@ u8 lut[80] = {
     0x15, 0x41, 0xa8, 0x32, 0x30, 0x0a,
 };
 
-u8 lut_p[80] = {
+
+// 这里如果B-B和W->W不驱动的话，屏幕很快就会花掉。
+// 但如果驱动的话，这种黑白转换就没有意义了。
+u8 lut_fly[80] = {
 //  RP0   RP1   RP2   RP3   RP4   RP5   RP6
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // LUT0
-    0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // LUT1
-    0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // LUT2
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // LUT3
+    0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // LUT0  B->B
+    0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // LUT1  B->W
+    0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // LUT2  W->B
+    0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // LUT3  W->W
 
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // LUT4
 
-    0x0a, 0x00, 0x00, 0x00, 0x01,  // Group0
+    0x0f, 0x00, 0x00, 0x00, 0x01,  // Group0
     0x00, 0x00, 0x00, 0x00, 0x01,  // Group1
     0x00, 0x00, 0x00, 0x00, 0x01,  // Group2
     0x00, 0x00, 0x00, 0x00, 0x01,  // Group3
@@ -224,15 +228,18 @@ void epd_init(void)
 
 	printk("epd_init: %dx%d\n", scr_w, scr_h);
 
+	update_mode = UPDATE_FULL;
 	epd_power(1);
-	epd_reset();
+	epd_reset(1);
 
+#if 0
 	epd_wait();
 	epd_cmd(0x12);  // SWRESET
 	delay_ms(10);
 	epd_wait();
 
-	//epd_lut_size();
+//	epd_lut_size();
+#endif
 
 	epd_cmd1(0x74, 0x54);
 	epd_cmd1(0x7e, 0x3b);
@@ -245,50 +252,47 @@ void epd_init(void)
 	epd_cmd1(0x3c, 0x05);  // border wavefrom
 
 	epd_window(0, 0, scr_w-1, scr_h-1);
-	
+
 	epd_cmd1(0x18, 0x80);  // Read Built-in temperature sensor
+
 #if 0
-
-	epd_cmd1(0x18, 0x80);  // Read Built-in temperature sensor
-
 	epd_cmd1(0x22, 0xb1);
 	epd_cmd(0x20);
 	epd_wait();
 	epd_dump_lut();
-
 #endif
 }
 
 
-void epd_update(int mode)
+void epd_update_mode(int mode)
+{
+	update_mode = mode;
+}
+
+
+void epd_update(void)
 {
 	int seq;
 
-	if(mode==0){
+	if(update_mode==UPDATE_FULL){
 		seq = 0xf7;
 	}else{
-		seq = mode;
+		if(update_mode==UPDATE_FAST){
+			epd_load_lut(lut_fast);
+		}else{
+			epd_load_lut(lut_fly);
+		}
+		seq = 0xc7;
 	}
 
 	epd_cmd1(0x22, seq);
 	epd_cmd(0x20);
-	epd_wait();
-//	epd_dump_lut();
-}
-
-void epd_update_lut(u8 *lut)
-{
-	epd_load_lut(lut);
-	epd_cmd1(0x22, 0xc4);
-	epd_cmd(0x20);
-	epd_wait();
 }
 
 
 void epd_sleep(void)
 {
 	epd_cmd1(0x10, 01);
-	delay_ms(10);
 }
 
 
@@ -305,11 +309,8 @@ void epd_screen_update(void)
 	if(scr_mode&EPD_BWR){
 		epd_cmd(0x26);
 		for(i=0; i<win_h*line_bytes; i++){
-			//epd_data(fb_rr[i]);
-			epd_data(fb_bw[i]^0xff);
-			//epd_data(0xff);
+			epd_data(fb_rr[i]);
 		}
-		//memcpy(fb_rr, fb_bw, win_h*line_bytes);
 	}
 }
 
@@ -362,66 +363,39 @@ void epd_screen_clean(int mode)
 
 void epd_test(void)
 {
-//	epd_hw_init(0x23200700, 0x05210006);  // for 2.13 board BW
+	epd_hw_init(0x23200700, 0x05210006, 104, 212,         ROTATE_3);  // for 2.13 board BW
+//	epd_hw_init(0x23111000, 0x07210120, 122, 250, EPD_BWR|ROTATE_3);  // for 2.13 board BWR
+//	epd_hw_init(0x23200700, 0x05210006, 128, 296, EPD_BWR|ROTATE_3);  // for 2.90 board
 
-//	epd_hw_init(0x23111000, 0x07210120);  // for 2.13 board BWR
-//	epd_init(104, 212,         ROTATE_3);
-	epd_init(104, 212, EPD_BWR|ROTATE_3);
-
-//	epd_hw_init(0x23111000, 0x07210120);  // for 2.13 board BWR
-//	epd_init(122, 250, EPD_BWR|ROTATE_3);
-
-//	epd_hw_init(0x23200700, 0x05210006);  // for 2.90 board
-//	epd_init(128, 296, EPD_BWR|ROTATE_3);
+	epd_init();
 
 #if 0
 	epd_screen_clean(2);
 #else
 	fb_test();
 #endif
-	//epd_load_lut(lut);
-	//epd_cmd1(0x2c, 0x08);
-	//epd_update(0xc7);
-	epd_update(0xf4);
+	epd_update();
+	epd_wait();
 
-#if 0
-	epd_window(32, 16, 96, 80);
-	epd_screen_clean(1);
-	epd_update_lut(lut);
-	//epd_update(0);
-#endif
 
-#if 0
-	epd_load_lut(lut_p);
-	epd_cmd1(0x2c, 0x55);
-
-#if 0
-	epd_cmd(0x37);
-	epd_data(0x00);
-	epd_data(0x00);
-	epd_data(0x00);
-	epd_data(0x00);
-	epd_data(0x40);
-	epd_data(0x00);
-	epd_data(0x00);
-#endif
-
-	epd_update(0xc0);
+#if 1
+	epd_update_mode(UPDATE_FLY);
+//	epd_cmd1(0x2c, 0x55);
+//	epd_update(0xc0);
 
 	for(int i=0; i<10; i++)
 	{
+		printk("%d\n", i);
 		delay_ms(3000);
 		fb_test();
-		epd_update(0x04);
-		//epd_update(0xf7);
-		//scr_mode += 1;
-		//scr_mode &= 0xf3;
+		epd_update();
+		epd_wait();
 	}
 #endif
 
-	delay_ms(1000);
+	delay_ms(5000);
 	printk("\nepd_test done.\n");
-	epd_cmd1(0x10, 0x03);
+	epd_cmd1(0x10, 0x01);
 	epd_power(0);
 	epd_hw_close();
 	//epd_update(0x03);
diff --git a/src/epd/epd.h b/src/epd/epd.h
index 7929e56..e2da734 100644
--- a/src/epd/epd.h
+++ b/src/epd/epd.h
@@ -31,7 +31,7 @@ int selflash(int otp_boot);
 void epd_hw_init(u32 config0, u32 config1, int w, int h, int mode);
 void epd_hw_open(void);
 void epd_hw_close(void);
-void epd_reset(void);
+void epd_reset(int val);
 void epd_wait(void);
 int  epd_busy(void);
 void epd_power(int on);
@@ -48,8 +48,8 @@ void epd_cmd_read(int cmd, u8 *data, int len);
 
 // epd_xxx
 void epd_init(void);
-void epd_load_lut(u8 *lut);
-void epd_update(int mode);
+void epd_update_mode(int mode);
+void epd_update();
 void epd_sleep(void);
 void epd_window(int x1, int y1, int x2, int y2);
 void epd_screen_update(void);
@@ -84,11 +84,17 @@ void fb_test(void);
 #define RED       2
 
 
+#define UPDATE_FULL  0
+#define UPDATE_FAST  1
+#define UPDATE_FLY   2
+
+
 extern int scr_w;
 extern int scr_h;
 extern int scr_mode;
 extern int line_bytes;
 extern int scr_padding;
+extern int update_mode;
 
 extern int win_w;
 extern int win_h;
diff --git a/src/epd/epd_gui.c b/src/epd/epd_gui.c
index 3ed098f..eaf3cf6 100644
--- a/src/epd/epd_gui.c
+++ b/src/epd/epd_gui.c
@@ -43,16 +43,11 @@ void draw_pixel(int x, int y, int color)
 	int byte_pos = ny*line_bytes+(nx>>3);
 	int bit_mask = 0x80>>(nx&7);
 
-	if(color==RED){
+	if(color!=WHITE){
+		fb_bw[byte_pos] &= ~bit_mask;
+	}
+	if(scr_mode&EPD_BWR && color==RED){
 		fb_rr[byte_pos] |=  bit_mask;
-		fb_bw[byte_pos] |=  bit_mask;
-	}else{
-		fb_rr[byte_pos] &= ~bit_mask;
-		if(color==WHITE){
-			fb_bw[byte_pos] |=  bit_mask;
-		}else{
-			fb_bw[byte_pos] &= ~bit_mask;
-		}
 	}
 }
 
@@ -224,11 +219,14 @@ char *wday_str[] = {
 	"日",
 };
 
+
 static int wday = 0;
 void fb_test(void)
 {
 	memset(fb_bw, 0xff, scr_h*line_bytes);
-	memset(fb_rr, 0x00, scr_h*line_bytes);
+	if(scr_mode&EPD_BWR){
+		memset(fb_rr, 0x00, scr_h*line_bytes);
+	}
 
 	draw_rect(0, 0, fb_w-1, fb_h-1, BLACK);
 	draw_rect(1, 1, fb_w-2, fb_h-2, BLACK);
@@ -246,9 +244,7 @@ void fb_test(void)
 	select_font(0);
 
 	char tbuf[64];
-//	sprintf(tbuf, "%4d年%2d月%2d日 星期%s", 2025, 4, 29, wday_str[wday]);
-	sprintf(tbuf, "2025年 4月29日 星期%s", wday_str[wday]);
-	printk("tbuf: %s\n", tbuf);
+	sprintk(tbuf, "%4d年%2d月%2d日 星期%s", 2025, 4, 29, wday_str[wday]);
 	draw_text(15, 85, tbuf, BLACK);
 	
 	wday += 1;
@@ -256,7 +252,8 @@ void fb_test(void)
 		wday = 0;
 
 	select_font(1);
-	draw_text(12, 20, "02:34", BLACK);
+	sprintk(tbuf, "%02d:%02d", 2+wday, 30+wday);
+	draw_text(12, 20, tbuf, BLACK);
 
 	epd_screen_update();
 }
diff --git a/src/epd/epd_hw.c b/src/epd/epd_hw.c
index 014dd42..0416c2b 100644
--- a/src/epd/epd_hw.c
+++ b/src/epd/epd_hw.c
@@ -80,7 +80,7 @@ void epd_hw_init(u32 config0, u32 config1, int w, int h, int mode)
 	epio_cs   = (config1>>16)&0xff;
 	epio_clk  = (config1>> 8)&0xff;
 	epio_sdi  = (config1>> 0)&0xff;
-	
+
 	scr_w = w;
 	scr_h = h;
 	scr_mode = mode;
@@ -138,12 +138,9 @@ static int epd_spi_read(void)
 }
 
 
-void epd_reset(void)
+void epd_reset(int val)
 {
-	EPD_RST(0);
-	delay_ms(20);
-	EPD_RST(1);
-	delay_ms(20);
+	EPD_RST(val);
 }
 
 
diff --git a/src/user_custs1_impl.c b/src/user_custs1_impl.c
index 52a6bbe..617c55e 100644
--- a/src/user_custs1_impl.c
+++ b/src/user_custs1_impl.c
@@ -247,14 +247,14 @@ void clock_draw(int full)
 	epd_screen_update();
 	
 	if(full){
-		epd_update(0xf4);
+		epd_update_mode(UPDATE_FULL);
 	}else{
-		epd_load_lut(lut_p);
-		epd_cmd1(0x2c, 0x55);
-		epd_update(0xc0);
-		epd_update(0x04);
+		epd_update_mode(UPDATE_FLY);
 	}
-	epd_cmd1(0x10, 0x03);
+	epd_update();
+	epd_wait();
+
+	epd_cmd1(0x10, 0x01);
 	epd_power(0);
 	epd_hw_close();
 }
diff --git a/src/user_peripheral.c b/src/user_peripheral.c
index 1682f1d..e01ca0b 100644
--- a/src/user_peripheral.c
+++ b/src/user_peripheral.c
@@ -183,7 +183,7 @@ void user_app_init(void)
 
 	adv_count = 0;
 	fspi_config(0x00030605);
-	epd_hw_init(0x23200700, 0x05210006, 104, 212, EPD_BWR|ROTATE_3);  // for 2.13 board BW
+	epd_hw_init(0x23200700, 0x05210006, 104, 212, ROTATE_3);  // for 2.13 board BW
 
 	selflash(otp_boot);