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
+}

radio/src/targets/horus/CMakeLists.txt

@@ -106,6 +106,7 @@ if (PCB STREQUAL X10)
       set(AUX2_SERIAL ON)
     endif()
     set(INTERNAL_GPS_BAUDRATE "9600" CACHE STRING "Baud rate for internal GPS")
+    set(ENABLE_SERIAL_PASSTHROUGH ON CACHE BOOL "Enable serial passthrough")
     set(CLI ON CACHE BOOL "Enable CLI")
   elseif (PCBREV STREQUAL T18)
     set(FLAVOUR t18)

radio/src/targets/horus/board.h

@@ -202,6 +202,7 @@ void intmoduleSerialStart(uint32_t baudrate, uint8_t rxEnable, uint16_t parity,
 void intmoduleSendByte(uint8_t byte);
 void intmoduleSendBuffer(const uint8_t * data, uint8_t size);
 void intmoduleSendNextFrame();
+void intmoduleWaitForTxCompleted();
 
 void extmoduleSerialStart();
 void extmoduleInvertedSerialStart(uint32_t baudrate);

radio/src/targets/horus/hal.h

@@ -817,7 +817,7 @@
 #define INTMODULE_DMA_STREAM            DMA2_Stream7
 #define INTMODULE_DMA_STREAM_IRQ        DMA2_Stream7_IRQn
 #define INTMODULE_DMA_STREAM_IRQHandler DMA2_Stream7_IRQHandler
-#define INTMODULE_DMA_FLAG_TC           DMA_IT_TCIF7
+#define INTMODULE_DMA_FLAG_TC           DMA_FLAG_TCIF7
 #define INTMODULE_DMA_CHANNEL           DMA_Channel_4
 #if defined(PCBX12S)
   #define INTMODULE_BOOTCMD_GPIO        GPIOC