Bumped the version to 2.40 - correctly this time, I hope.

Added fixed for a few minor things. pin driver for rht03/dht type
sensors. Network stuff is experimental - for now.

gpio/Makefile

@@ -37,7 +37,7 @@ INCLUDE	= -I$(DESTDIR)$(PREFIX)/include
 CFLAGS	= $(DEBUG) -Wall -Wextra $(INCLUDE) -Winline -pipe
 
 LDFLAGS	= -L$(DESTDIR)$(PREFIX)/lib
-LIBS    = -lwiringPi -lwiringPiDev -lpthread -lrt -lm
+LIBS    = -lwiringPi -lwiringPiDev -lpthread -lrt -lm -lcrypt
 
 # May not need to  alter anything below this line
 ###############################################################################

gpio/gpio.1

@@ -9,15 +9,15 @@ gpio \- Command-line access to Raspberry Pi's GPIO
 .PP
 .B gpio
 .B [ \-g | \-1 ]
-.B mode/read/write/aread/awrite/wb/pwm/clock ...
+.B mode/read/write/aread/awrite/wb/pwm/clock/toggle/blink ...
 .PP
 .B gpio
 .B [ \-x extension:params ]
-.B mode/read/write/aread/awrite/pwm/pwmTone ...
+.B mode/read/write/aread/awrite/pwm/toggle/blink ...
 .PP
 .B gpio
 .B [ \-p ]
-.B read/write/toggle/wb
+.B read/write/toggle/blink
 .B ...
 .PP
 .B gpio
@@ -118,11 +118,23 @@ respective logic levels.
 Write the given value (0 or 1) to the pin. You need to set the pin
 to output mode first.
 
+.TP
+.B toggle <pin> 
+Changes the state of a GPIO pin; 0 to 1, or 1 to 0.
+
+Note unlike the blink command, the pin must be in output mode first.
+
+.TP
+.B blink <pin> 
+Blinks the given pin on/off. Press Control-C to exit.
+
+Note: This command explicitly sets the pin to output mode.
+
 .TP
 .B aread <pin>
-Read the analog value of the given pin. This needs to be uses in
+Read the analog value of the given pin. This needs to be used in
 conjunction with a -x flag to add in an extension that handles analog
-inputs.  respective logic levels.
+inputs.
 
 e.g. gpio -x mcp3002:200:0 aread 200
 
@@ -132,7 +144,7 @@ will read the first analog input on an mcp3002 SPI ADC chip.
 .B awrite <pin> <value>
 Write the analog value to the given pin. This needs to be used in
 conjunction with a -x flag to add in an extension that handles analog
-inputs.  respective logic levels.
+inputs. 
 
 e.g. gpio -x mcp4802:200:0 awrite 200 128
 
@@ -234,7 +246,7 @@ absolutely sure you know what you're doing.
 high | low
 
 Change the USB current limiter to high (1.2 amps) or low (the default, 600mA)
-This is only applicable to the model B+
+This is only applicable to the Model B+ and the Model B, v2.
 
 .TP
 .B pwm-bal/pwm-ms 
@@ -253,7 +265,6 @@ them. Optionally it will set the I2C baudrate to that supplied in Kb/sec
 
 Note: On recent kernels with the device tree enabled you should use the
 raspi-config program to load/unload the I2C device at boot time.
-(or disable the device tree to continue to use this method)
 
 .TP
 .B load spi
@@ -268,7 +279,6 @@ e.g. 8192 bytes then reboot.
 
 Note: On recent kernels with the device tree enabled you should use the
 raspi-config program to load/unload the SPI device at boot time.
-(or disable the device tree to continue to use this method)
 
 .TP
 .B gbr

gpio/gpio.c

@@ -1443,6 +1443,16 @@ int main (int argc, char *argv [])
     wpMode = WPI_MODE_PIFACE ;
   }
 
+// Check for -z argument so we don't actually initialise wiringPi
+
+  else if (strcasecmp (argv [1], "-z") == 0)
+  {
+    for (i = 2 ; i < argc ; ++i)
+      argv [i - 1] = argv [i] ;
+    --argc ;
+    wpMode = WPI_MODE_UNINITIALISED ;
+  }
+
 // Default to wiringPi mode
 
   else
@@ -1460,12 +1470,15 @@ int main (int argc, char *argv [])
   {
     if (argc < 3)
     {
-      fprintf (stderr, "%s: -x missing extension specification.\n", argv [0]) ;
+      fprintf (stderr, "%s: -x missing extension command.\n", argv [0]) ;
       exit (EXIT_FAILURE) ;
     }
 
-    if (!loadWPiExtension (argv [0], argv [2], TRUE))	// Prints its own error messages
+    if (!loadWPiExtension (argv [0], argv [2], TRUE))
+    {
+      fprintf (stderr, "%s: Extension load failed: %s\n", argv [0], strerror (errno)) ;
       exit (EXIT_FAILURE) ;
+    }
 
 // Shift args down by 2