Add framebuffer board file to interface with the eCos framebuffer device.

2014-07-02 11:52:08 +10:00 · 2014-07-02 11:52:08 +10:00 · 8a3da5a2a3
commit 8a3da5a2a3
parent 8a11eb71aa
1 changed files with 94 additions and 0 deletions
--- a/boards/addons/gdisp/board_framebuffer_eCos.h
+++ b/boards/addons/gdisp/board_framebuffer_eCos.h
@ -0,0 +1,94 @@
+/*
+ * This file is subject to the terms of the GFX License. If a copy of
+ * the license was not distributed with this file, you can obtain one at:
+ *
+ *              http://ugfx.org/license.html
+ */
+
+/**
+ * Note: this implementation makes a number of design choices...
+ *  1/ We are using the macro definitions for eCos framebuffer driver. If you want to use the
+ *  	function's instead you could use the g->board variable to store your cyg_fb pointer.
+ *  2/ We assume the initialisation succeeds. It is probably a fatal error if it doesn't.
+ *  3/ We hard-code in this file the pixel format, whether flushing is required and the FRAMEBUF device.
+ *  	Please adjust them for your hardware.
+ */
+
+// Set this to your frame buffer pixel format.
+#ifndef GDISP_LLD_PIXELFORMAT
+	#define GDISP_LLD_PIXELFORMAT		GDISP_PIXELFORMAT_RGB565
+#endif
+
+// Uncomment this if your frame buffer device requires flushing ("Synch" in eCos speak)
+//#define GDISP_HARDWARE_FLUSH		TRUE
+
+#ifdef GDISP_DRIVER_VMT
+
+	#include <cyg/io/framebuf.h>
+
+	// SET THIS HERE!!!
+	// This must also match the pixel format above
+	#define FRAMEBUF		640x480x16
+
+	static void board_init(GDisplay *g, fbInfo *fbi) {
+		// Initialize the frame buffer device - we assume everything is going to succeed.
+		CYG_FB_ON(FRAMEBUF);
+		#if (CYG_FB_FLAGS0(FRAMEBUF) & CYG_FB_FLAGS0_MUST_BE_ON)
+			CYG_FB_FILL_BLOCK(FRAMEBUF, 0, 0, CYG_FB_WIDTH(FRAMEBUF), CYG_FB_HEIGHT(FRAMEBUF), CYG_FB_MAKE_COLOUR(FRAMEBUF, 0, 0, 0));
+		#endif
+
+		// Set the details of the frame buffer
+		#ifdef CYGHWR_IO_FRAMEBUF_FUNCTIONALITY_VIEWPORT
+			g->g.Width = CYG_FB_VIEWPORT_WIDTH(FRAMEBUF);
+			g->g.Height = CYG_FB_VIEWPORT_HEIGHT(FRAMEBUF);
+		#else
+			g->g.Width = CYG_FB_WIDTH(FRAMEBUF);
+			g->g.Height = CYG_FB_HEIGHT(FRAMEBUF);
+		#endif
+		g->g.Backlight = 100;
+		g->g.Contrast = 50;
+		fbi->linelen = CYG_FB_STRIDE(FRAMEBUF);							// bytes per row
+		fbi->pixels = CYG_FB_BASE(FRAMEBUF);							// pointer to the memory frame buffer
+	}
+
+	#if GDISP_HARDWARE_FLUSH
+		static void board_flush(GDisplay *g) {
+			(void) g;
+
+			// You might want to replace CYG_FB_UPDATE_NOW with CYG_FB_UPDATE_VERTICAL_RETRACE
+			// if you are not using uGFX's auto flush or timer flush mechanisms and frame synchronisation
+			// is important for your display.
+			CYG_FB_SYNCH(FRAMEBUF, CYG_FB_UPDATE_NOW);
+		}
+	#endif
+
+	#if GDISP_NEED_CONTROL
+		static void board_backlight(GDisplay *g, uint8_t percent) {
+			(void) g;
+			#if (CYG_FB_FLAGS0(FRAMEBUF) & CYG_FB_FLAGS0_BACKLIGHT)
+				cyg_fb_ioctl_backlight backlight;
+				size_t len = sizeof(cyg_fb_ioctl_backlight);
+
+				if (CYG_FB_IOCTL(FRAMEBUF, CYG_FB_IOCTL_BACKLIGHT_GET, &backlight, &len) || !backlight.fbbl_max)
+					return;
+				if (backlight.fbbl_max == 1)
+					backlight.fbbl_current = percent ? 1 : 0;
+				else
+					backlight.fbbl_current = (((uint32_t)percent)*backlight.fbbl_max)/100;
+				CYG_FB_IOCTL(FRAMEBUF, CYG_FB_IOCTL_BACKLIGHT_SET, &backlight, &len);
+			#endif
+		}
+
+		static void board_contrast(GDisplay *g, uint8_t percent) {
+			(void) g;
+			(void) percent;
+		}
+
+		static void board_power(GDisplay *g, powermode_t pwr) {
+			// Not implemented yet.
+			(void) g;
+			(void) pwr;
+		}
+	#endif
+
+#endif /* GDISP_DRIVER_VMT */