Changed the build system to drop I2C for now. Seems to cause too many issues

on non Raspbian systems (and even on some Raspbian systems it would appear ):

fixed a timing issue on softTone
fixed some issues in wiringPisetup introduced when optimising the mmap calls.

wiringPi/Makefile

@@ -46,7 +46,7 @@ SRC	=	wiringPi.c wiringPiFace.c wiringSerial.c wiringShift.c	\
 		gertboard.c						\
 		piNes.c							\
 		lcd.c piHiPri.c piThread.c				\
-		wiringPiSPI.c wiringPiI2C.c 				\
+		wiringPiSPI.c 						\
 		softPwm.c softServo.c softTone.c
 
 OBJ	=	$(SRC:.c=.o)

wiringPi/softServo.c

@@ -54,6 +54,15 @@
 //	the multipexing, but it does need to be at least 10mS, and preferably 16
 //	from what I've been able to determine.
 
+// WARNING:
+//	This code is really experimental. It was written in response to some people
+//	asking for a servo driver, however while it works, there is too much
+//	jitter to successfully drive a small servo - I have tried it with a micro
+//	servo and it worked, but the servo ran hot due to the jitter in the signal
+//	being sent to it.
+//
+//	If you want servo control for the Pi, then use the servoblaster kernel
+//	module.
 
 #define	MAX_SERVOS	8
 

wiringPi/softTone.c

@@ -59,7 +59,9 @@ static PI_THREAD (softToneThread)
   for (;;)
   {
     frewq = frewqs [pin] ;
-    if (frewq != 0)
+    if (frewq == 0)
+      delay (1) ;
+    else
     {
       halfPeriod = 500000 / frewq ;
 

wiringPi/wiringPi.c

@@ -1204,7 +1204,11 @@ int wiringPiSetup (void)
   if ((fd = open ("/dev/mem", O_RDWR | O_SYNC) ) < 0)
   {
     if (wiringPiDebug)
-      fprintf (stderr, "wiringPiSetup: Unable to open /dev/mem: %s\n", strerror (errno)) ;
+    {
+      int serr = errno ;
+	fprintf (stderr, "wiringPiSetup: Unable to open /dev/mem: %s\n", strerror (errno)) ;
+      errno = serr ;
+    }
     return -1 ;
   }
 
@@ -1214,7 +1218,11 @@ int wiringPiSetup (void)
   if ((int32_t)gpio == -1)
   {
     if (wiringPiDebug)
-      fprintf (stderr, "wiringPiSetup: mmap failed: %s\n", strerror (errno)) ;
+    {
+      int serr = errno ;
+	fprintf (stderr, "wiringPiSetup: mmap failed: %s\n", strerror (errno)) ;
+      errno = serr ;
+    }
     return -1 ;
   }
 
@@ -1224,27 +1232,39 @@ int wiringPiSetup (void)
   if ((int32_t)pwm == -1)
   {
     if (wiringPiDebug)
-      fprintf (stderr, "wiringPiSetup: mmap failed (pwm): %s\n", strerror (errno)) ;
+    {
+      int serr = errno ;
+	fprintf (stderr, "wiringPiSetup: mmap failed (pwm): %s\n", strerror (errno)) ;
+      errno = serr ;
+    }
     return -1 ;
   }
  
 // Clock control (needed for PWM)
 
   clk = (uint32_t *)mmap(0, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED, fd, CLOCK_BASE) ;
-  if ((int32_t)clk < 0)
+  if ((int32_t)clk == -1)
   {
     if (wiringPiDebug)
-      fprintf (stderr, "wiringPiSetup: mmap failed (clk): %s\n", strerror (errno)) ;
+    {
+      int serr = errno ;
+	fprintf (stderr, "wiringPiSetup: mmap failed (clk): %s\n", strerror (errno)) ;
+      errno = serr ;
+    }
     return -1 ;
   }
  
 // The drive pads
 
   pads = (uint32_t *)mmap(0, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED, fd, GPIO_PADS) ;
-  if ((int32_t)pads < 0)
+  if ((int32_t)pads == -1)
   {
     if (wiringPiDebug)
-      fprintf (stderr, "wiringPiSetup: mmap failed (pads): %s\n", strerror (errno)) ;
+    {
+      int serr = errno ;
+	fprintf (stderr, "wiringPiSetup: mmap failed (pads): %s\n", strerror (errno)) ;
+      errno = serr ;
+    }
     return -1 ;
   }
 
@@ -1256,10 +1276,14 @@ int wiringPiSetup (void)
 // The system timer
 
   timer = (uint32_t *)mmap(0, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED, fd, GPIO_TIMER) ;
-  if ((int32_t)timer < 0)
+  if ((int32_t)timer == -1)
   {
     if (wiringPiDebug)
-      fprintf (stderr, "wiringPiSetup: mmap failed (timer): %s\n", strerror (errno)) ;
+    {
+      int serr = errno ;
+	fprintf (stderr, "wiringPiSetup: mmap failed (timer): %s\n", strerror (errno)) ;
+      errno = serr ;
+    }
     return -1 ;
   }
 

wiringPi/wiringPi.h

@@ -53,6 +53,7 @@
 #define	INT_EDGE_SETUP		0
 #define	INT_EDGE_FALLING	1
 #define	INT_EDGE_RISING		2
+#define	INT_EDGE_BOTH		3
 
 // Threads