Merged in ambihelical/ugfx/ssd1306 (pull request #16)

Further SSD1306 driver improvements

drivers/gdisp/SSD1306/SSD1306.h

@@ -33,10 +33,11 @@
 #define SSD1306_HV_PAGE_ADDRESS			0x22
 #define SSD1306_PAM_PAGE_START			0xB0
 
-#define SSD1306_COMSCANINC 				0xC0
+#define SSD1306_ROWSCANINC 				0xC0
-#define SSD1306_COMSCANDEC 				0xC8
+#define SSD1306_ROWSCANDEC 				0xC8
 
-#define SSD1306_SEGREMAP 				0xA0
+#define SSD1306_COLSCANINC 				0xA0
+#define SSD1306_COLSCANDEC 				0xA1
 
 #define SSD1306_CHARGEPUMP 				0x8D
 

drivers/gdisp/SSD1306/gdisp_lld_SSD1306.c

@@ -105,8 +105,8 @@ LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
 	write_cmd(g, SSD1306_SETSTARTLINE | 0);
 	write_cmd2(g, SSD1306_ENABLE_CHARGE_PUMP, 0x14);
 	write_cmd2(g, SSD1306_MEMORYMODE, 0);
-	write_cmd(g, SSD1306_SEGREMAP+1);
+	write_cmd(g, SSD1306_COLSCANDEC);
-	write_cmd(g, SSD1306_COMSCANDEC);
+	write_cmd(g, SSD1306_ROWSCANDEC);
 	#if GDISP_SCREEN_HEIGHT == 64
 		write_cmd2(g, SSD1306_SETCOMPINS, 0x12);
 	#else
@@ -159,35 +159,60 @@ LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
 
 #if GDISP_HARDWARE_CLEARS
 	LLDSPEC void gdisp_lld_clear(GDisplay *g) {
-		uint8_t fill = (g->p.color == Black) ? 0 : 0xff;
+		uint8_t fill = (gdispColor2Native(g->p.color) == Black) ? 0 : 0xff;
 		int bytes = GDISP_SCREEN_WIDTH * GDISP_SCREEN_HEIGHT/8;
 		memset(RAM(g), fill, bytes);
 		g->flags |= GDISP_FLG_NEEDFLUSH;
 	}
 #endif
 
+#if GDISP_HARDWARE_FILLS
+	LLDSPEC void gdisp_lld_fill_area(GDisplay *g) {
+		coord_t sy = g->p.y;
+		coord_t ey = sy + g->p.cy - 1;
+		coord_t sx = g->p.x;
+		coord_t ex = g->p.x + g->p.cx - 1;
+		if (g->g.Orientation == GDISP_ROTATE_90 || g->g.Orientation == GDISP_ROTATE_270) {
+			coord_t tmp; 
+			tmp = sx; sx = sy; sy = tmp;
+			tmp = ex; ex = ey; ey = tmp;
+		}
+		unsigned spage = sy / 8; 
+		uint8_t * base = RAM(g) + GDISP_SCREEN_WIDTH * spage;
+		uint8_t mask = 0xff << (sy&7);
+		unsigned zpages = (ey / 8) - spage;
+		coord_t col;
+		if (gdispColor2Native(g->p.color)==Black) {
+			while (zpages--) {
+				for (col = sx; col <= ex; col++)
+					base[col] &= ~mask;
+				mask = 0xff;
+				base += GDISP_SCREEN_WIDTH;
+			}
+			mask &= (0xff >> (7 - (ey&7)));
+			for (col = sx; col <= ex; col++)
+				base[col] &= ~mask;
+		} else {
+			while (zpages--) {
+				for (col = sx; col <= ex; col++)
+					base[col] |= mask;
+				mask = 0xff;
+				base += GDISP_SCREEN_WIDTH;
+			}
+			mask &= (0xff >> (7 - (ey&7)));
+			for (col = sx; col <= ex; col++)
+				base[col] |= mask;
+		}
+	}
+#endif
+
 #if GDISP_HARDWARE_DRAWPIXEL
 	LLDSPEC void gdisp_lld_draw_pixel(GDisplay *g) {
-		coord_t		x, y;
+		coord_t x = g->p.x;
-
+		coord_t y = g->p.y;
-		switch(g->g.Orientation) {
+		if (g->g.Orientation == GDISP_ROTATE_90 || g->g.Orientation == GDISP_ROTATE_270) {
-		default:
+			coord_t tmp; 
-		case GDISP_ROTATE_0:
+			tmp = x; x = y; y = tmp;
-			x = g->p.x;
-			y = g->p.y;
-			break;
-		case GDISP_ROTATE_90:
-			x = g->p.y;
-			y = GDISP_SCREEN_HEIGHT-1 - g->p.x;
-			break;
-		case GDISP_ROTATE_180:
-			x = GDISP_SCREEN_WIDTH-1 - g->p.x;
-			y = GDISP_SCREEN_HEIGHT-1 - g->p.y;
-			break;
-		case GDISP_ROTATE_270:
-			x = GDISP_SCREEN_WIDTH-1 - g->p.y;
-			y = g->p.x;
-			break;
 		}
 		if (gdispColor2Native(g->p.color) != Black)
 			RAM(g)[xyaddr(x, y)] |= xybit(y);
@@ -199,26 +224,11 @@ LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
 
 #if GDISP_HARDWARE_PIXELREAD
 	LLDSPEC color_t gdisp_lld_get_pixel_color(GDisplay *g) {
-		coord_t		x, y;
+		coord_t x = g->p.x;
-
+		coord_t y = g->p.y;
-		switch(g->g.Orientation) {
+		if (g->g.Orientation == GDISP_ROTATE_90 || g->g.Orientation == GDISP_ROTATE_270) {
-		default:
+			coord_t tmp; 
-		case GDISP_ROTATE_0:
+			tmp = x; x = y; y = tmp;
-			x = g->p.x;
-			y = g->p.y;
-			break;
-		case GDISP_ROTATE_90:
-			x = g->p.y;
-			y = GDISP_SCREEN_HEIGHT-1 - g->p.x;
-			break;
-		case GDISP_ROTATE_180:
-			x = GDISP_SCREEN_WIDTH-1 - g->p.x;
-			y = GDISP_SCREEN_HEIGHT-1 - g->p.y;
-			break;
-		case GDISP_ROTATE_270:
-			x = GDISP_SCREEN_WIDTH-1 - g->p.y;
-			y = g->p.x;
-			break;
 		}
 		return (RAM(g)[xyaddr(x, y)] & xybit(y)) ? White : Black;
 	}
@@ -252,8 +262,8 @@ LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
 		case GDISP_CONTROL_ORIENTATION:
 			if (g->g.Orientation == (orientation_t)g->p.ptr)
 				return;
-			switch((orientation_t)g->p.ptr) {
+			orientation_t orient = (orientation_t)g->p.ptr;
-			/* Rotation is handled by the drawing routines */
+			switch(orient) {
 			case GDISP_ROTATE_0:
 			case GDISP_ROTATE_180:
 				g->g.Height = GDISP_SCREEN_HEIGHT;
@@ -267,7 +277,33 @@ LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
 			default:
 				return;
 			}
-			g->g.Orientation = (orientation_t)g->p.ptr;
+			// Remap the rows and columns according to orientation.  This just
+			// eliminates the need to reverse x or y directions in the drawing
+			// routines.  There is still the need to swap x and y for 90 and 270.
+			// However, without these, the hardware fill routine would be much
+			// more complicated. 
+			acquire_bus(g);
+			switch(orient) {
+			default:
+			case GDISP_ROTATE_0:
+				write_cmd(g, SSD1306_COLSCANDEC);
+				write_cmd(g, SSD1306_ROWSCANDEC);
+				break;
+			case GDISP_ROTATE_180:
+				write_cmd(g, SSD1306_COLSCANINC);
+				write_cmd(g, SSD1306_ROWSCANINC);
+				break;
+			case GDISP_ROTATE_90:
+				write_cmd(g, SSD1306_COLSCANDEC);
+				write_cmd(g, SSD1306_ROWSCANINC);
+				break;
+			case GDISP_ROTATE_270:
+				write_cmd(g, SSD1306_COLSCANINC);
+				write_cmd(g, SSD1306_ROWSCANDEC);
+				break;
+			}
+			release_bus(g);
+			g->g.Orientation = orient;
 			return;
 
 		case GDISP_CONTROL_CONTRAST:

drivers/gdisp/SSD1306/gdisp_lld_config.h

@@ -19,6 +19,7 @@
 #define GDISP_HARDWARE_PIXELREAD		TRUE
 #define GDISP_HARDWARE_CONTROL      TRUE
 #define GDISP_HARDWARE_CLEARS       TRUE
+#define GDISP_HARDWARE_FILLS        TRUE
 
 #define GDISP_LLD_PIXELFORMAT			GDISP_PIXELFORMAT_MONO