bugfix IRQ masking

include/irqhandler.h

@@ -17,8 +17,8 @@
 #include "timekeeper.h"
 
 void irqHandler(void *pvParameters);
-int mask_user_IRQ();
-int unmask_user_IRQ();
+bool mask_user_IRQ();
+bool unmask_user_IRQ();
 
 #ifdef HAS_DISPLAY
 void IRAM_ATTR DisplayIRQ();

src/irqhandler.cpp

@@ -119,18 +119,18 @@ void IRAM_ATTR GpsIRQ() {
 }
 #endif
 
-int mask_user_IRQ() {
+bool mask_user_IRQ() {
   // begin of time critical section: lock I2C bus to ensure accurate timing
   if (I2C_MUTEX_LOCK()) {
     xTaskNotify(irqHandlerTask, MASK_IRQ, eSetBits);
-    return 0;
+    return true;
   } else
-    return 1; // failure
+    return false; // failure
 }
 
-int unmask_user_IRQ() {
+bool unmask_user_IRQ() {
   // end of time critical section: release I2C bus
   I2C_MUTEX_UNLOCK();
   xTaskNotify(irqHandlerTask, UNMASK_IRQ, eSetBits);
-  return 0;
+  return true;
 }

src/main.cpp

@@ -116,8 +116,7 @@ void setup() {
 
   // create some semaphores for syncing / mutexing tasks
   I2Caccess = xSemaphoreCreateMutex(); // for access management of i2c bus
-  if (I2Caccess)
-    xSemaphoreGive(I2Caccess); // Flag the i2c bus available for use
+  assert(I2Caccess != NULL);
 
   // disable brownout detection
 #ifdef DISABLE_BROWNOUT