Fix #3: wrong port for limit switches

Author: tbfleming

README.md

@@ -20,7 +20,6 @@ Usage notes:
   * Laser mode: ON ($32)
   * Minimum S value: 0.0 ($31)
   * Maximum S value: 1.0 ($30)
-* Homing not tested
 * Hard limits not yet ported
 * Control inputs not yet ported (e.g. Cycle Start and Safety Door switches)
 

grbl/config.h

@@ -660,9 +660,9 @@
 
 // Define homing/hard limit switch input pins and limit interrupt vectors.
 // NOTE: All limit bit pins must be on the same port, but not on a port with other input pins (CONTROL).
-#define LIMIT_DDR         LPC_GPIO0->FIODIR
-#define LIMIT_PIN         LPC_GPIO0->FIOPIN
-#define LIMIT_PORT        LPC_GPIO0->FIOPIN
+#define LIMIT_DDR         LPC_GPIO1->FIODIR
+#define LIMIT_PIN         LPC_GPIO1->FIOPIN
+#define LIMIT_PORT        LPC_GPIO1->FIOPIN
 #define X_LIMIT_BIT       25  // X-MIN=24, X-MAX=25
 #define Y_LIMIT_BIT       27  // Y-MIN=26, Y-MAX=27
 #define Z_LIMIT_BIT	      29  // Z-MIN=28, Z-MAX=29