Implement interrupts and noInterrupts

- Using irq_lock and irq_unlock zephyr apis.

Signed-off-by: Ayush Singh <[email protected]>

cores/arduino/zephyrCommon.cpp

@@ -175,6 +175,22 @@ size_t analog_pin_index(pin_size_t pinNumber) {
 
 #endif //CONFIG_ADC
 
+static unsigned int irq_key;
+static bool interrupts_disabled = false;
+
+void interrupts(void) {
+  if (interrupts_disabled) {
+    irq_unlock(irq_key);
+    interrupts_disabled = false;
+  }
+}
+
+void noInterrupts(void) {
+  if (!interrupts_disabled) {
+    irq_key = irq_lock();
+    interrupts_disabled = true;
+  }
+}
 }
 
 void yield(void) {