Update HardwareSerial.cpp

Jason2866 · web-flow · commit 2b058919eef7 · 2022-03-02T13:29:32.000+01:00
diff --git a/cores/esp32/HardwareSerial.cpp b/cores/esp32/HardwareSerial.cpp
@@ -119,6 +119,9 @@ void serialEventRun(void)
 #if !CONFIG_DISABLE_HAL_LOCKS
 #define HSERIAL_MUTEX_LOCK()    do {} while (xSemaphoreTake(_lock, portMAX_DELAY) != pdPASS)
 #define HSERIAL_MUTEX_UNLOCK()  xSemaphoreGive(_lock)
+#else
+#define HSERIAL_MUTEX_LOCK()    
+#define HSERIAL_MUTEX_UNLOCK()  
 #endif
 
 HardwareSerial::HardwareSerial(int uart_nr) : 
