Fixed delayMicroseconds for more than 1 second.

Added new code for max31855

gpio/extensions.c

@@ -43,6 +43,7 @@
 #include <sr595.h>
 #include <pcf8591.h>
 #include <pcf8574.h>
+#include <max31855.h>
 #include <mcp3002.h>
 #include <mcp3004.h>
 #include <mcp4802.h>
@@ -334,6 +335,32 @@ static int doExtensionPcf8591 (char *progName, int pinBase, char *params)
 }
 
 
+/*
+ * doExtensionMax31855:
+ *	Analog IO
+ *	max31855:base:spiChan
+ *********************************************************************************
+ */
+
+static int doExtensionMax31855 (char *progName, int pinBase, char *params)
+{
+  int spi ;
+
+  if ((params = extractInt (progName, params, &spi)) == NULL)
+    return FALSE ;
+
+  if ((spi < 0) || (spi > 1))
+  {
+    fprintf (stderr, "%s: SPI channel (%d) out of range\n", progName, spi) ;
+    return FALSE ;
+  }
+
+  max31855Setup (pinBase, spi) ;
+
+  return TRUE ;
+}
+
+
 /*
  * doExtensionMcp3002:
  *	Analog IO
@@ -475,6 +502,7 @@ struct extensionFunctionStruct extensionFunctions [] =
   { "mcp3004",		&doExtensionMcp3004	},
   { "mcp4802",		&doExtensionMcp4802	},
   { "mcp3422",		&doExtensionMcp3422	},
+  { "max31855",		&doExtensionMax31855	},
   { NULL,		NULL		 	},
 } ;