diff --git a/STM32F1/libraries/Adafruit_ILI9341_STM/Adafruit_ILI9341_STM.cpp b/STM32F1/libraries/Adafruit_ILI9341_STM/Adafruit_ILI9341_STM.cpp
index 914e4d153..fe2433f8f 100644
--- a/STM32F1/libraries/Adafruit_ILI9341_STM/Adafruit_ILI9341_STM.cpp
+++ b/STM32F1/libraries/Adafruit_ILI9341_STM/Adafruit_ILI9341_STM.cpp
@@ -215,6 +215,16 @@ void Adafruit_ILI9341_STM::begin(SPIClass & spi, uint32_t freq)
 
 }
 
+void Adafruit_ILI9341_STM::beginTransaction()
+{
+  mSPI.beginTransaction(SPISettings(_freq, MSBFIRST, SPI_MODE0, DATA_SIZE_16BIT));
+}
+
+void Adafruit_ILI9341_STM::endTransaction()
+{
+  mSPI.endTransaction();
+}
+
 
 void Adafruit_ILI9341_STM::setAddrWindow(uint16_t x0, uint16_t y0,
                                          uint16_t x1, uint16_t y1)
diff --git a/STM32F1/libraries/Adafruit_ILI9341_STM/Adafruit_ILI9341_STM.h b/STM32F1/libraries/Adafruit_ILI9341_STM/Adafruit_ILI9341_STM.h
index b77b3562f..458ac2c53 100644
--- a/STM32F1/libraries/Adafruit_ILI9341_STM/Adafruit_ILI9341_STM.h
+++ b/STM32F1/libraries/Adafruit_ILI9341_STM/Adafruit_ILI9341_STM.h
@@ -102,12 +102,21 @@ class Adafruit_ILI9341_STM : public Adafruit_GFX {
   Adafruit_ILI9341_STM(int8_t _CS, int8_t _DC, int8_t _RST = -1);
 
   void     begin(SPIClass & spi, uint32_t freq=48000000);
-  void     begin(void) { begin(SPI); }
-  void     setAddrWindow(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1),
+  void     begin(void) { begin(SPI); };
+           /** If the ILI9341 shares the SPI bus with another device, you should call this function
+            *  whenever that other device has been active, and you want to switch back to drawing
+            *  (and endTransaction(), when done). It will set the SPI mode and clock speed to values
+            *  appropriate for the ILI9341. It is @em not a replacement for begin().
+            *
+            *  If the ILI9341 is the only device on the SPI bus, you do not have to call this function. */
+  void     beginTransaction(),
+           /** @see endTransaction */
+           endTransaction(),
+           setAddrWindow(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1),
            pushColor(uint16_t color),
            pushColors(void * colorBuffer, uint16_t nr_pixels, uint8_t async=0),
            fillScreen(uint16_t color),
-		   drawLine(int16_t x0, int16_t y0,int16_t x1, int16_t y1, uint16_t color),
+           drawLine(int16_t x0, int16_t y0,int16_t x1, int16_t y1, uint16_t color),
            drawPixel(int16_t x, int16_t y, uint16_t color),
            drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color),
            drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color),