diff --git a/cores/arduino/wiring.c b/cores/arduino/wiring.c
index 4264bb9..b693b14 100644
--- a/cores/arduino/wiring.c
+++ b/cores/arduino/wiring.c
@@ -12,6 +12,11 @@ void delay(uint64_t dwMs){
     msleep(dwMs);
     return;
 }
+void delayMicroseconds(uint64_t dwUs){
+    usleep(dwUs);
+    return;
+}
+
 void pll_init(){
     sysctl_pll_set_freq(SYSCTL_PLL0, 800000000UL);
     sysctl_pll_set_freq(SYSCTL_PLL1, 300000000UL);
diff --git a/cores/arduino/wiring.h b/cores/arduino/wiring.h
index 33cc8a7..f4be69c 100644
--- a/cores/arduino/wiring.h
+++ b/cores/arduino/wiring.h
@@ -25,6 +25,8 @@ extern uint64_t micros(void);
  */
 extern void delay(uint64_t dwMs);
 
+extern void delayMicroseconds(uint64_t dwUs);
+
 void pll_init(void);
 
 
diff --git a/cores/arduino/wiring_digital.h b/cores/arduino/wiring_digital.h
index ca1f354..b5a515b 100644
--- a/cores/arduino/wiring_digital.h
+++ b/cores/arduino/wiring_digital.h
@@ -3,6 +3,7 @@
 
 #include "Arduino.h"
 #include <stdint.h>
+#include "platform.h"
 
 #ifdef __cplusplus
 extern "C"{
@@ -12,11 +13,11 @@ extern "C"{
 #define PortAddr_t uint32_t
 #define PortRegister_t volatile uint32_t *
 
-#define digitalPinToPort(pin)    ((PortAddr_t)     GPIO_CTRL_ADDR)
-#define digitalPinToPortIn(pin)  ((PortAddr_t)     GPIO_CTRL_ADDR)
-#define digitalPinToBitMask(pin) ((PortValue_t)    (1<<variant_pin_map[pin].bit_pos))
-#define portOutputRegister(port) ((PortRegister_t) (GPIO_CTRL_ADDR + GPIO_OUTPUT_VAL))
-#define portInputRegister(port)  ((PortRegister_t) (GPIO_CTRL_ADDR + GPIO_INPUT_VAL))
+#define digitalPinToPort(pin)    ((PortAddr_t)     GPIOHS_BASE_ADDR)
+#define digitalPinToPortIn(pin)  ((PortAddr_t)     GPIOHS_BASE_ADDR)
+#define digitalPinToBitMask(pin) ((PortValue_t)    (1<<pin))
+#define portOutputRegister(port) ((PortRegister_t) (GPIOHS_BASE_ADDR + GPIOHS_OUTPUT_VAL))
+#define portInputRegister(port)  ((PortRegister_t) (GPIOHS_BASE_ADDR + GPIOHS_INPUT_VAL))
 
 /**
  * \brief Configures the specified pin to behave either as an input or an output. See the description of digital pins for details.