Serial pass-through

radio/src/targets/common/arm/CMakeLists.txt

@@ -1,6 +1,7 @@
 set(TIMERS 3 CACHE STRING "Timers count (2 or 3)")
 set_property(CACHE TIMERS PROPERTY STRINGS 2 3)
 option(CLI "Command Line Interface" OFF)
+option(ENABLE_SERIAL_PASSTHROUGH "Enable serial passthrough" OFF)
 option(DEBUG "Debug mode" OFF)
 option(LOG_TELEMETRY "Telemetry Logs on SD card" OFF)
 option(LOG_BLUETOOTH "Bluetooth Logs on SD card" OFF)
@@ -101,6 +102,10 @@ if(CLI OR DEBUG)
   set(SRC ${SRC} dump.cpp)
 endif()
 
+if(ENABLE_SERIAL_PASSTHROUGH)
+  add_definitions(-DENABLE_SERIAL_PASSTHROUGH)
+endif()
+
 if(DEBUG)
   add_definitions(-DDEBUG)
 endif()

radio/src/targets/common/arm/stm32/intmodule_serial_driver.cpp

@@ -205,3 +205,15 @@ void intmoduleSendNextFrame()
 #endif
   }
 }
+
+void intmoduleWaitForTxCompleted()
+{
+#if defined(INTMODULE_DMA_STREAM)
+  if (DMA_GetCmdStatus(INTMODULE_DMA_STREAM) == ENABLE) {
+    while(DMA_GetFlagStatus(INTMODULE_DMA_STREAM, INTMODULE_DMA_FLAG_TC) == RESET);
+    DMA_ClearFlag(INTMODULE_DMA_STREAM, INTMODULE_DMA_FLAG_TC);
+  }
+#else
+  #error "intmoduleWaitForTC() not implemented for IRQ based transfer"
+#endif
+}