SH1106 port initial.

extras/ssd1306/ssd1306.h

@@ -26,6 +26,17 @@ extern "C"
 {
 #endif
 
+/**
+ * SH1106 pump voltage value
+ */
+typedef enum
+{
+    SH1106_VOLTAGE_74 = 0, // 7.4 Volt
+    SH1106_VOLTAGE_80,     // 8.0 Volt
+    SH1106_VOLTAGE_84,     // 8.4 Volt
+    SH1106_VOLTAGE_90      // 9.0 Volt
+} sh1106_voltage_t;
+
 /**
  * I/O protocols
  */
@@ -36,12 +47,22 @@ typedef enum
     SSD1306_PROTO_SPI3     //!< SPI 9 bits
 } ssd1306_protocol_t;
 
+/**
+ * Screen type
+ */
+typedef enum
+{
+    SSD1306_SCREEN = 0,
+    SH1106_SCREEN
+} ssd1306_screen_t;
+
 /**
  * Device descriptor
  */
 typedef struct
 {
     ssd1306_protocol_t protocol;
+    ssd1306_screen_t screen ;
     union {
 #if (SSD1306_I2C_SUPPORT)
         uint8_t addr ;          //!< I2C address, used by SSD1306_PROTO_I2C
@@ -134,6 +155,14 @@ int ssd1306_set_display_start_line(const ssd1306_t *dev, uint8_t start);
  */
 int ssd1306_set_display_offset(const ssd1306_t *dev, uint8_t offset);
 
+/**
+ * Select charge pump voltage. See value in datasheet.
+ * @param dev Pointer to device descriptor
+ * @param select Select charge pump voltage value
+ * @return Non-zero if error occured
+ */
+int sh1106_set_charge_pump_voltage(const ssd1306_t *dev, sh1106_voltage_t select);
+
 /**
  * Enable or disable the charge pump. See application note in datasheet.
  * @param dev Pointer to device descriptor