From fe7b378a7b850b893e236975ca2f9532c2114113 Mon Sep 17 00:00:00 2001
From: Joel Bodenmann <joel@seriouslyembedded.com>
Date: Sun, 21 Jun 2015 09:51:05 +0200
Subject: [PATCH] Adding 'flipHorizontally' and 'flipVertically^optiony to
 SSD1963

---
 .../gdisp/SSD1963/board_SSD1963_template.h    |  4 ++-
 drivers/gdisp/SSD1963/gdisp_lld_SSD1963.c     | 25 +++++++++++++------
 drivers/gdisp/SSD1963/ssd1963.h               |  4 +--
 3 files changed, 23 insertions(+), 10 deletions(-)

diff --git a/drivers/gdisp/SSD1963/board_SSD1963_template.h b/drivers/gdisp/SSD1963/board_SSD1963_template.h
index f9f248e7..9f214604 100644
--- a/drivers/gdisp/SSD1963/board_SSD1963_template.h
+++ b/drivers/gdisp/SSD1963/board_SSD1963_template.h
@@ -16,7 +16,9 @@ static const LCD_Parameters	DisplayTimings[] = {
 		CALC_PERIOD(480,2,2,41),				// Total Horizontal Period (calculated from above line)
 		2, 2, 10,								// Vertical Timings (back porch, front porch, pulse)
 		CALC_PERIOD(272,2,2,10),				// Total Vertical Period (calculated from above line)
-		CALC_FPR(480,272,2,2,41,2,2,10,60ULL)	// FPR - the 60ULL is the frames per second. Note the ULL!
+		CALC_FPR(480,272,2,2,41,2,2,10,60ULL),	// FPR - the 60ULL is the frames per second. Note the ULL!
+		FALSE,									// Flip horizontally
+		FALSE									// Flip vertically
 	},
 };
 
diff --git a/drivers/gdisp/SSD1963/gdisp_lld_SSD1963.c b/drivers/gdisp/SSD1963/gdisp_lld_SSD1963.c
index af2d907e..d3cd9d2a 100644
--- a/drivers/gdisp/SSD1963/gdisp_lld_SSD1963.c
+++ b/drivers/gdisp/SSD1963/gdisp_lld_SSD1963.c
@@ -27,7 +27,7 @@ typedef struct LCD_Parameters {
 	uint16_t	vpulse;							// Vertical Pulse
 	uint16_t	vperiod;						// Vertical Period (Total)
 	uint32_t	fpr;							// Calculated FPR
-	uint16_t	flags;							// For command "SSD1963_SET_GDISP_MODE"
+	uint16_t	mode;							// For command "SSD1963_SET_LCD_MODE"
 		/* Set the pannel data width */
 		#define LCD_PANEL_DATA_WIDTH_24BIT 				(1<<5)						// 18bit default
 		/* Set the color deeph enhancement */
@@ -44,6 +44,9 @@ typedef struct LCD_Parameters {
 		/* Set the lcd panel interface type */										// default TFT mode
 		#define LCD_PANEL_TYPE_SERIAL_RGB_MODE			((1<<6) << 8)				// Serial RGB mode
 		#define LCD_PANEL_TYPE_SERIAL_RGB_DUMMY_MODE	(((1<<5) | (1<<6)) << 8)	// Serial RGB+dummy mode
+
+	bool_t		flipHorz;						// Flipping the display horizontally
+	bool_t		flipVert;						// Flipping the display vertically
 } LCD_Parameters;
 
 #include "board_SSD1963.h"
@@ -190,9 +193,9 @@ LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
 		write_reg(g, SSD1963_SET_PLL, 0x03);			// Use PLL
 
 		/* LCD panel parameters */
-		write_index(g, SSD1963_SET_GDISP_MODE);
-		write_data(g, lcdp->flags & 0xFF);
-		write_data(g, (lcdp->flags >> 8) & 0xFF);
+		write_index(g, SSD1963_SET_LCD_MODE);
+		write_data(g, lcdp->mode & 0xFF);
+		write_data(g, (lcdp->mode >> 8) & 0xFF);
 		//**	write_data(g, 0x18);					//Enabled dithering
 		//**	write_data(g, 0x00);
 		write_data16(g, lcdp->width-1);
@@ -200,9 +203,17 @@ LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
 		write_data(g, 0x00);							// RGB - line sequences for serial TFT
 	#endif
 
-	// From Displaytech example - for larger horizontal resolutions - not sure if display-specific
-	if (lcdp->width >= 640)
-		write_reg(g, SSD1963_SET_ADDRESS_MODE, 2);		// Flip horizontal direction
+	
+	// Display flipping
+	if (lcdp->flipHorz)	{
+		write_reg(g, SSD1963_SET_ADDRESS_MODE, SSD1963_ADDR_MODE_FLIP_HORZ);
+	} else if (lcdp->flipVert) {
+		write_reg(g, SSD1963_SET_ADDRESS_MODE, SSD1963_ADDR_MODE_FLIP_VERT);
+	} else if (lcdp->flipHorz && lcdp->flipVert) {
+		write_reg(g, SSD1963_SET_ADDRESS_MODE, SSD1963_ADDR_MODE_FLIP_VERT | SSD1963_ADDR_MODE_FLIP_HORZ);
+	} else {
+		write_reg(g, SSD1963_SET_ADDRESS_MODE, 0x00);
+	}
 
 	write_reg(g, SSD1963_SET_PIXEL_DATA_INTERFACE, SSD1963_PDI_16BIT565);
 	write_reg(g, SSD1963_SET_PIXEL_FORMAT, 0x50);
diff --git a/drivers/gdisp/SSD1963/ssd1963.h b/drivers/gdisp/SSD1963/ssd1963.h
index eec2ae99..c392b827 100644
--- a/drivers/gdisp/SSD1963/ssd1963.h
+++ b/drivers/gdisp/SSD1963/ssd1963.h
@@ -42,8 +42,8 @@
 #define SSD1963_SET_TEAR_SCANLINE		0x0044
 #define SSD1963_GET_SCANLINE			0x0045
 #define SSD1963_READ_DDB				0x00A1
-#define SSD1963_SET_GDISP_MODE			0x00B0
-#define SSD1963_GET_GDISP_MODE			0x00B1
+#define SSD1963_SET_LCD_MODE			0x00B0
+#define SSD1963_GET_LCD_MODE			0x00B1
 #define SSD1963_SET_HORI_PERIOD			0x00B4
 #define SSD1963_GET_HORI_PERIOD			0x00B5
 #define SSD1963_SET_VERT_PERIOD			0x00B6