Support for user access to SSD1306 commands longer than one byte

Author: mzero

Adafruit_SSD1306.cpp

@@ -453,11 +453,32 @@ void Adafruit_SSD1306::Transaction::data(uint8_t byte) {
             Command to issue (0x00 to 0xFF, see datasheet).
     @return None (void).
 */
-void Adafruit_SSD1306::ssd1306_command(uint8_t c) {
+void Adafruit_SSD1306::ssd1306_command(uint8_t cmd) {
   Transaction trans(*this);
-  trans.command(c);
+  trans.command(cmd);
 }
 
+void Adafruit_SSD1306::ssd1306_command(uint8_t cmd, uint8_t a) {
+  Transaction trans(*this);
+  trans.command(cmd, a);
+}
+
+void Adafruit_SSD1306::ssd1306_command(uint8_t cmd, uint8_t a, uint8_t b) {
+  Transaction trans(*this);
+  trans.command(cmd, a, b);
+}
+
+void Adafruit_SSD1306::ssd1306_command(const uint8_t *cmd, uint8_t n) {
+  Transaction trans(*this);
+  while (n--)
+    trans.command(pgm_read_byte(cmd++));
+}
+
+
+
+
+
+
 // ALLOCATE & INIT DISPLAY -------------------------------------------------
 
 /*!

Adafruit_SSD1306.h

@@ -154,10 +154,15 @@ class Adafruit_SSD1306 : public Adafruit_GFX {
   void         startscrolldiagright(uint8_t start, uint8_t stop);
   void         startscrolldiagleft(uint8_t start, uint8_t stop);
   void         stopscroll(void);
-  void         ssd1306_command(uint8_t c);
   boolean      getPixel(int16_t x, int16_t y);
   uint8_t     *getBuffer(void);
 
+  // low level access to SSD1306 commands
+  void         ssd1306_command(uint8_t cmd);
+  void         ssd1306_command(uint8_t cmd, uint8_t a);
+  void         ssd1306_command(uint8_t cmd, uint8_t a, uint8_t b);
+  void         ssd1306_command(const uint8_t* cmd, uint8_t n);
+
  private:
   inline void  SPIwrite(uint8_t d) __attribute__((always_inline));
   void         drawFastHLineInternal(int16_t x, int16_t y, int16_t w,