From 3b12678e6ed14c7e78aae141cbc31994559e73ce Mon Sep 17 00:00:00 2001
From: ergosys <ergosys@gmail.com>
Date: Thu, 11 Dec 2014 22:54:19 -0800
Subject: add hardware clear

---
 drivers/gdisp/SSD1306/gdisp_lld_SSD1306.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'drivers/gdisp/SSD1306/gdisp_lld_SSD1306.c')

diff --git a/drivers/gdisp/SSD1306/gdisp_lld_SSD1306.c b/drivers/gdisp/SSD1306/gdisp_lld_SSD1306.c
index f241270e..9670d2d0 100644
--- a/drivers/gdisp/SSD1306/gdisp_lld_SSD1306.c
+++ b/drivers/gdisp/SSD1306/gdisp_lld_SSD1306.c
@@ -151,6 +151,16 @@ LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
 	}
 #endif
 
+#if GDISP_HARDWARE_CLEARS
+	LLDSPEC void gdisp_lld_clear(GDisplay *g) {
+		uint8_t fill = (g->p.color == Black) ? 0 : 0xff;
+		int bytes = GDISP_SCREEN_WIDTH * GDISP_SCREEN_HEIGHT/8;
+		int off;
+		for (off = 0; off < bytes; off++)
+			RAM(g)[off] = fill;
+	}
+#endif
+
 #if GDISP_HARDWARE_DRAWPIXEL
 	LLDSPEC void gdisp_lld_draw_pixel(GDisplay *g) {
 		coord_t		x, y;
-- 
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