Minor changes to the PiGlow code - got the orange & yellow the right way

round at last..

Updated for the 0x0012 board revision on the new A+

examples/Makefile

@@ -43,6 +43,7 @@ SRC	=	blink.c blink8.c blink12.c					\
 		nes.c								\
 		softPwm.c softTone.c 						\
 		delayTest.c serialRead.c serialTest.c okLed.c ds1302.c		\
+		lowPower.c							\
 		rht03.c piglow.c
 
 OBJ	=	$(SRC:.c=.o)

examples/lowPower.c

@@ -0,0 +1,68 @@
+/*
+ * lowPower.c:
+ *	Check the Pi's LOW-Power signal.
+ *
+ *	This is a demonstration program that could be turned into some sort
+ *	of logger via e.g. syslog - however it's also probably something
+ *	that might be better handled by a future kernel - who knows.
+ *
+ * Copyright (c) 2014 Gordon Henderson.
+ ***********************************************************************
+ * 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 <stdio.h>
+#include <time.h>
+#include <wiringPi.h>
+
+
+#define	LOW_POWER	35
+
+/*
+ * lowPower:
+ *	This is an ISR that waits for the low-power signal going low and
+ *	prints the result.
+ *********************************************************************************
+ */
+
+void lowPower (void)
+{
+  time_t t ;
+
+  time (&t) ;
+  printf ("%s: LOW POWER DETECTED\n", ctime (&t)) ;
+}
+
+
+/*
+ *********************************************************************************
+ * main
+ *********************************************************************************
+ */
+
+int main (void)
+{
+  wiringPiSetupGpio () ;	// GPIO mode as it's an internal pin
+
+  wiringPiISR (LOW_POWER, INT_EDGE_FALLING, &lowPower) ;
+
+  for (;;)
+    delay (1000) ;
+
+  return 0 ;
+}

examples/spiSpeed.c

@@ -0,0 +1,118 @@
+/*
+ * spiSpeed.c:
+ *	Code to measure the SPI speed/latency.
+ *	Copyright (c) 2014 Gordon Henderson
+ ***********************************************************************
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <string.h>
+#include <errno.h>
+//#include <fcntl.h>
+//#include <sys/ioctl.h>
+//#include <linux/spi/spidev.h>
+
+#include <wiringPi.h>
+#include <wiringPiSPI.h>
+
+#define	TRUE	(1==1)
+#define	FALSE	(!TRUE)
+
+#define	SPI_CHAN		0
+#define	NUM_TIMES		100
+#define	MAX_SIZE		(1024*1024)
+
+static int myFd ;
+
+
+void spiSetup (int speed)
+{
+  if ((myFd = wiringPiSPISetup (SPI_CHAN, speed)) < 0)
+  {
+    fprintf (stderr, "Can't open the SPI bus: %s\n", strerror (errno)) ;
+    exit (EXIT_FAILURE) ;
+  }
+}
+
+
+int main (void)
+{
+  int speed, times, size ;
+  unsigned int start, end ;
+  int spiFail ;
+  unsigned char *myData ;
+  double timePerTransaction, perfectTimePerTransaction, dataSpeed ;
+
+  if ((myData = malloc (MAX_SIZE)) == NULL)
+  {
+    fprintf (stderr, "Unable to allocate buffer: %s\n", strerror (errno)) ;
+    exit (EXIT_FAILURE) ;
+  }
+
+  wiringPiSetup () ;
+
+  for (speed = 1 ; speed <= 32 ; speed *= 2)
+  {
+    printf ("+-------+--------+----------+----------+-----------+------------+\n") ;
+    printf ("|   MHz |   Size | mS/Trans |      TpS |    Mb/Sec | Latency mS |\n") ;
+    printf ("+-------+--------+----------+----------+-----------+------------+\n") ;
+
+    spiFail = FALSE ;
+    spiSetup (speed * 1000000) ;
+    for (size = 1 ; size <= MAX_SIZE ; size *= 2)
+    {
+      printf ("| %5d | %6d ", speed, size) ;
+
+      start = millis () ;
+      for (times = 0 ; times < NUM_TIMES ; ++times)
+	if (wiringPiSPIDataRW (SPI_CHAN, myData, size) == -1)
+	{
+	  printf ("SPI failure: %s\n", strerror (errno)) ;
+	  spiFail = TRUE ;
+	  break ;
+	}
+      end = millis () ;
+
+      if (spiFail)
+	break ;
+
+      timePerTransaction        = ((double)(end - start) / (double)NUM_TIMES) / 1000.0 ;
+      dataSpeed                 =  (double)(size * 8)    / (1024.0 * 1024.0) / timePerTransaction  ;
+      perfectTimePerTransaction = ((double)(size * 8))   / ((double)(speed * 1000000)) ;
+
+      printf ("| %8.3f ", timePerTransaction * 1000.0) ;
+      printf ("| %8.1f ", 1.0 / timePerTransaction) ;
+      printf ("| %9.5f ", dataSpeed) ;
+      printf ("|   %8.5f ", (timePerTransaction - perfectTimePerTransaction) * 1000.0) ;
+      printf ("|\n") ;
+
+    }
+
+    close (myFd) ;
+    printf ("+-------+--------+----------+----------+-----------+------------+\n") ;
+    printf ("\n") ;
+  }
+
+  return 0 ;
+}