Spi dynamic speed (#432)

src/internal/P9813GenericMethod.h

@@ -37,6 +37,8 @@ License along with NeoPixel.  If not, see
 template<typename T_TWOWIRE> class P9813MethodBase
 {
 public:
+    typedef typename T_TWOWIRE::SettingsObject SettingsObject;
+
     P9813MethodBase(uint8_t pinClock, uint8_t pinData, uint16_t pixelCount, size_t elementSize, size_t settingsSize) :
         _sizeData(pixelCount * elementSize + settingsSize),
         _sizeEndFrame((pixelCount + 15) / 16), // 16 = div 2 (bit for every two pixels) div 8 (bits to bytes)
@@ -104,6 +106,11 @@ public:
         return _sizeData;
     };
 
+    void applySettings(const SettingsObject& settings)
+    {
+        _wire.applySettings(settings);
+    }
+
 private:
     const size_t   _sizeData;   // Size of '_data' buffer below
     const size_t   _sizeEndFrame;