From 130d84ec16a8566cd80c83e00d0cbfdcdd6ce072 Mon Sep 17 00:00:00 2001
From: Joel Bodenmann <joel@unormal.org>
Date: Sat, 22 Dec 2012 20:45:11 +0100
Subject: benchmark demo update

---
 demos/benchmarks/main.c | 146 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100644 demos/benchmarks/main.c

(limited to 'demos/benchmarks/main.c')

diff --git a/demos/benchmarks/main.c b/demos/benchmarks/main.c
new file mode 100644
index 00000000..9bd3cef3
--- /dev/null
+++ b/demos/benchmarks/main.c
@@ -0,0 +1,146 @@
+/*
+    ChibiOS/GFX - Copyright (C) 2012
+                 Joel Bodenmann aka Tectu <joel@unormal.org>
+
+    This file is part of ChibiOS/GFX.
+
+    ChibiOS/GFX is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    ChibiOS/GFX is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "ch.h"
+#include "hal.h"
+#include "chprintf.h"
+#include "stdlib.h"
+#include "string.h"
+#include "gfx.h"
+
+#define SCB_DEMCR (*(volatile unsigned *)0xE000EDFC)
+#define CPU_RESET_CYCLECOUNTER do { SCB_DEMCR = SCB_DEMCR | 0x01000000; \
+DWT_CYCCNT = 0; \
+DWT_CTRL = DWT_CTRL | 1 ; } while(0)
+
+static int uitoa(unsigned int value, char * buf, int max) {
+    int n = 0;
+    int i = 0;
+    unsigned int tmp = 0;
+
+    if (NULL == buf)
+        return -3;
+
+    if (2 > max)
+        return -4;
+
+    i=1;
+    tmp = value;
+    if (0 > tmp) {
+        tmp *= -1;
+        i++;
+    }
+    for (;;) {
+        tmp /= 10;
+        if (0 >= tmp)
+            break;
+        i++;
+    }
+    if (i >= max) {
+        buf[0] = '?';
+        buf[1] = 0x0;
+        return 2;
+    }
+
+    n = i;
+    tmp = value;
+    if (0 > tmp) {
+        tmp *= -1;
+    }
+    buf[i--] = 0x0;
+    for (;;) {
+        buf[i--] = (tmp % 10) + '0';
+        tmp /= 10;
+        if (0 >= tmp) {
+            break;
+        }
+    }
+    if (-1 != i) {
+        buf[i--] = '-';
+    }
+
+    return n;
+}
+
+void benchmark(void) {
+    uint32_t i, pixels, ms, pps;
+    char pps_str[25];
+	coord_t height, width, rx, ry, rcx, rcy;
+    color_t random_color;
+	font_t font;
+
+    gdispSetOrientation(GDISP_ROTATE_90);
+    gdispClear(Black);
+
+	width = gdispGetWidth();
+	height = gdispGetHeight();
+    font = gdispOpenFont("UI2 Double");
+
+	gdispDrawStringBox(0, 0, width, 30, "ChibiOS/GFX - Benchmark", font, White, justifyCenter);
+
+	font = gdispOpenFont("UI2");
+	gdispDrawStringBox(0, height/2, width, 30, "5000 random rectangles", font, White, justifyCenter);
+	
+	chThdSleepMilliseconds(3000);
+	
+	/* seed for the rand() */
+	srand(DWT_CYCCNT);
+	pixels = 0;
+
+	CPU_RESET_CYCLECOUNTER;
+
+	for (i = 0; i < 5000; i++) {
+		random_color = (rand() % 65535);
+		rx = (rand() % (width-10));
+		ry = (rand() % (height-10));
+		rcx = (rand() % ((width-rx)-10))+10;
+		rcy = (rand() % ((height-ry)-10))+10;
+
+		gdispFillArea(rx, ry, rcx, rcy, random_color);
+		pixels += (rcx+1)*(rcy+1);
+	}
+
+	ms = DWT_CYCCNT / 168000;
+	pps = (float)pixels/((float)ms/1000.0f);
+
+	memset (pps_str, 0, sizeof(pps_str));
+	uitoa(pps, pps_str, sizeof(pps_str));
+	strcat(pps_str, " Pixels/s");
+
+	font = gdispOpenFont("UI2 Double");
+	gdispClear(Black);
+	gdispDrawStringBox(0, 0, width, 30, "ChibiOS/GFX - Benchmark", font, White, justifyCenter);
+	gdispDrawStringBox(0, height/2, width, 30, pps_str, font, White, justifyCenter);
+	//gdispDrawString(20, height/2, pps_str, font, White);
+}
+
+int main(void) {
+    halInit();
+    chSysInit();
+	gdispInit();
+	
+	benchmark();
+    
+	while(TRUE) {
+        chThdSleepMilliseconds(500);
+	}
+
+	return 0;
+}
-- 
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