WiringPi V2.0 for Python2 & Python3

2026-02-07 04:10:25 +09:00 · 2013-03-27 22:22:00 +00:00
parent 98bcb20d93
commit 567ee0027e
89 changed files with 10178 additions and 1302 deletions
--- a/WiringPi/examples/speed.c
+++ b/WiringPi/examples/speed.c
@@ -0,0 +1,123 @@
+/*
+ * speed.c:
+ *	Simple program to measure the speed of the various GPIO
+ *	access mechanisms.
+ *
+ * Copyright (c) 2012-2013 Gordon Henderson. <projects@drogon.net>
+ ***********************************************************************
+ * This file is part of wiringPi:
+ *	https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ *    wiringPi is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU Lesser General Public License as published by
+ *    the Free Software Foundation, either version 3 of the License, or
+ *    (at your option) any later version.
+ *
+ *    wiringPi 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 Lesser General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Lesser General Public License
+ *    along with wiringPi.  If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+#include <wiringPi.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#define	FAST_COUNT	10000000
+#define	SLOW_COUNT	 1000000
+
+
+int main (void)
+{
+  int i ;
+  uint32_t start, end, count, sum, perSec ;
+
+  printf ("Raspberry Pi wiringPi speed test program\n") ;
+
+// Start the standard way
+
+  if (wiringPiSetup () == -1)
+    exit (1) ;
+
+  printf ("Native wiringPi method: (%8d iterations)\n", FAST_COUNT) ;
+
+  pinMode (0, OUTPUT) ;
+
+  sum = 0 ;
+  for (i = 0 ; i < 3 ; ++i)
+  {
+    printf ("  Pass: %d: ", i) ;
+    fflush (stdout) ;
+
+    start = millis () ;
+    for (count = 0 ; count < FAST_COUNT ; ++count)
+      digitalWrite (0, 1) ;
+    end = millis () ;
+    printf (" %8dmS\n", end - start) ;
+    sum += (end - start) ;
+  }
+  digitalWrite (0, 0) ;
+  printf ("   Average: %8dmS", sum / 3) ;
+  perSec = (int)(double)FAST_COUNT / (double)((double)sum / 3.0) * 1000.0 ;
+  printf (": %6d/sec\n", perSec) ;
+
+
+  printf ("Native GPIO method: (%8d iterations)\n", FAST_COUNT) ;
+
+  if (wiringPiSetupGpio () == -1)
+    exit (1) ;
+
+  pinMode (17, OUTPUT) ;
+
+  sum = 0 ;
+  for (i = 0 ; i < 3 ; ++i)
+  {
+    printf ("  Pass: %d: ", i) ;
+    fflush (stdout) ;
+
+    start = millis () ;
+    for (count = 0 ; count < 10000000 ; ++count)
+      digitalWrite (17, 1) ;
+    end = millis () ;
+    printf (" %8dmS\n", end - start) ;
+    sum += (end - start) ;
+  }
+  digitalWrite (17, 0) ;
+  printf ("   Average: %8dmS", sum / 3) ;
+  perSec = (int)(double)FAST_COUNT / (double)((double)sum / 3.0) * 1000.0 ;
+  printf (": %6d/sec\n", perSec) ;
+
+
+// Switch to SYS mode:
+
+  if (wiringPiSetupSys () == -1)
+    exit (1) ;
+
+  printf ("/sys/class/gpio method: (%8d iterations)\n", SLOW_COUNT) ;
+
+  sum = 0 ;
+  for (i = 0 ; i < 3 ; ++i)
+  {
+    printf ("  Pass: %d: ", i) ;
+    fflush (stdout) ;
+
+    start = millis () ;
+    for (count = 0 ; count < SLOW_COUNT ; ++count)
+      digitalWrite (17, 1) ;
+    end = millis () ;
+    printf (" %8dmS\n", end - start) ;
+    sum += (end - start) ;
+  }
+  digitalWrite (17, 0) ;
+  printf ("   Average: %8dmS", sum / 3) ;
+  perSec = (int)(double)SLOW_COUNT / (double)((double)sum / 3.0) * 1000.0 ;
+  printf (": %6d/sec\n", perSec) ;
+
+  return 0 ;
+}