Merge pull request #127 from lukkass222/DisplayST7789_dev_invert

added invertMode and normalMode

Author: lexus2k

src/v2/lcd/st7789/lcd_st7789.h

@@ -120,6 +120,20 @@ template <class I> class InterfaceST7789: public I
      */
     void setOffset(lcdint_t ox, lcdint_t oy);
 
+    /**
+     * @brief Set invert mode off
+     * 
+     * Switches display to normal the colors of the display
+     */
+    void normalMode();
+
+    /**
+     * @brief Set invert mode on
+     * 
+     * Invert the colors of the display
+     */
+    void invertMode();
+
 private:
     const int8_t m_dc = -1;                      ///< data/command pin for SPI, -1 for i2c
     NanoDisplayBase<InterfaceST7789<I>> &m_base; ///< basic lcd display support interface

src/v2/lcd/st7789/lcd_st7789.inl

@@ -159,6 +159,20 @@ template <class I> void InterfaceST7789<I>::setOffset(lcdint_t ox, lcdint_t oy)
     }
 }
 
+template <class I> void InterfaceST7789<I>::normalMode()
+{
+    commandStart();
+    this->send(0x20); // Normal display
+    this->stop();
+}
+
+template <class I> void InterfaceST7789<I>::invertMode()
+{
+    commandStart();
+    this->send(0x21); // Invert display
+    this->stop();
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 //             ST7789 basic 16-bit implementation
 ////////////////////////////////////////////////////////////////////////////////