diff --git a/platform/stm32f429/init_lcd.c b/platform/stm32f429/init_lcd.c
index 235c37d91..e3058e4db 100644
--- a/platform/stm32f429/init_lcd.c
+++ b/platform/stm32f429/init_lcd.c
@@ -208,15 +208,13 @@ static void init_rgb_timings() {
     LTDC_AVBP(lcd_panel_vsync+lcd_panel_vbp-1) |
     LTDC_AHBP(lcd_panel_hsync+lcd_panel_hbp-1);
 
-#if 0
   /*– Active Width and Active Height: The Active Width and Active Height are configured by
       programming the accumulated value HSYNC Width + HBP + Active Width - 1 and the accumulated
       value VSYNC Width + VBP + Active Height - 1 in the LTDC_AWCR register (only up to 1024x768 is supported). */
 
-  long * LTDC_AWCR = (long *)(LCD_TFT_BASE + 0x10);
-  set_ltdc_register(LTDC_AWCR,
-      lcd_panel_hsync+lcd_panel_hbp+lcd_panel_hadr-1,
-      lcd_panel_vsync+lcd_panel_vbp+lcd_panel_vadr-1);
+  LTDC_AWCR =
+    LTDC_AAH(lcd_panel_vsync+lcd_panel_vbp+lcd_panel_vadr-1) |
+    LTDC_AAW(lcd_panel_hsync+lcd_panel_hbp+lcd_panel_hadr-1);
 
   /*– Total Width: The Total width is configured by programming the accumulated
       value HSYNC Width + HBP + Active Width + HFP - 1 in the LTDC_TWCR register.
@@ -225,12 +223,12 @@ static void init_rgb_timings() {
       value VSYNC Height + VBP + Active Height + VFP - 1 in the LTDC_TWCR register.
       The VFP is the Vertical front porch period
     */
-  long * LTDC_TWCR = (long *)(LCD_TFT_BASE + 0x14);
-  set_ltdc_register(LTDC_TWCR,
-      lcd_panel_hsync+lcd_panel_hbp+lcd_panel_hadr+lcd_panel_hfp-1,
-      lcd_panel_vsync+lcd_panel_vbp+lcd_panel_vadr+lcd_panel_vfp-1);
 
+  LTDC_TWCR =
+    LTDC_TOTALH(lcd_panel_vsync+lcd_panel_vbp+lcd_panel_vadr+lcd_panel_vfp-1) |
+    LTDC_TOTALW(lcd_panel_hsync+lcd_panel_hbp+lcd_panel_hadr+lcd_panel_hfp-1);
 
+#if 0
 
   /* STEP 4 : Configure the synchronous signals and clock polarity in the LTDC_GCR register */
 
diff --git a/platform/stm32f429/registers/ltdc.h b/platform/stm32f429/registers/ltdc.h
index fd9b42a60..875e44266 100644
--- a/platform/stm32f429/registers/ltdc.h
+++ b/platform/stm32f429/registers/ltdc.h
@@ -7,48 +7,51 @@
 
 #define LTDC_REGISTER_AT(offset) (*(volatile uint32_t *)(LTDC_BASE+offset))
 
-// LTDC Synchronization size configuration register
+// LTDC synchronization size configuration register
 
 #define LTDC_SSCR LTDC_REGISTER_AT(0x08)
 
 #define LOW_BIT_VSH 0
 #define HIGH_BIT_VSH 10
 #define LTDC_VSH(v) REGISTER_FIELD_VALUE(VSH, v)
-#define LOW_BIT_HSW 15
+#define LOW_BIT_HSW 16
 #define HIGH_BIT_HSW 27
 #define LTDC_HSW(v) REGISTER_FIELD_VALUE(HSW, v)
 
-// LTDC Back porch configuration register
+// LTDC back porch configuration register
 
 #define LTDC_BPCR LTDC_REGISTER_AT(0x0C)
 
 #define LOW_BIT_AVBP 0
 #define HIGH_BIT_AVBP 10
 #define LTDC_AVBP(v) REGISTER_FIELD_VALUE(AVBP, v)
-#define LOW_BIT_AHBP 15
+#define LOW_BIT_AHBP 16
 #define HIGH_BIT_AHBP 27
 #define LTDC_AHBP(v) REGISTER_FIELD_VALUE(AHBP, v)
 
+// LTDC active width configuration register
+
+#define LTDC_AWCR LTDC_REGISTER_AT(0x10)
+
+#define LOW_BIT_AAH 0
+#define HIGH_BIT_AAH 10
+#define LTDC_AAH(v) REGISTER_FIELD_VALUE(AAH, v)
+#define LOW_BIT_AAW 16
+#define HIGH_BIT_AAW 27
+#define LTDC_AAW(v) REGISTER_FIELD_VALUE(AAW, v)
+
+// LTDC total width configuration register
+
+#define LTDC_TWCR LTDC_REGISTER_AT(0x14)
+
+#define LOW_BIT_TOTALH 0
+#define HIGH_BIT_TOTALH 10
+#define LTDC_TOTALH(v) REGISTER_FIELD_VALUE(TOTALH, v)
+#define LOW_BIT_TOTALW 16
+#define HIGH_BIT_TOTALW 27
+#define LTDC_TOTALW(v) REGISTER_FIELD_VALUE(TOTALW, v)
+
 #if 0
-extern LTDC_BPCR_t * LTDC_BPCR;
-
-typedef struct {
-  unsigned int AAH:11;
-  unsigned int :5;
-  unsigned int AAW:12;
-  unsigned int :4;
-} LTDC_AWCR_t;
-
-extern LTDC_AWCR_t * LTDC_AWCR;
-
-typedef struct {
-  unsigned int TOTALH:11;
-  unsigned int :5;
-  unsigned int TOTALW:12;
-  unsigned int :4;
-} LTDC_TWCR_t;
-
-extern LTDC_TWCR_t * LTDC_TWCR;
 
 typedef struct {
   unsigned int LTDCEN:1;