Tiny OLED I2C + RADDS 1.5 + Marlin4Due

#if ENABLED(SERVO_ENDSTOPS) || ENABLED(Z_PROBE_ALLEN_KEY) || ENABLED(Z_PROBE_SLED)

#if defined(SERVO_ENDSTOPS) || ENABLED(Z_PROBE_ALLEN_KEY) || ENABLED(Z_PROBE_SLED)

#define U8GLIB_SSD1306

oled.PNG

#ifdef ULTRA_LCD

	// RADDS LCD panel
	#ifdef NEWPANEL

		#ifdef RADDS_DISPLAY
			#define LCD_PINS_RS 		42
	  	  	#define LCD_PINS_ENABLE 	43
	  	  	#define LCD_PINS_D4 		44
	  	  	#define LCD_PINS_D5 		45
	  	  	#define LCD_PINS_D6 		46
	  	  	#define LCD_PINS_D7 		47

		  	#define BEEPER 41

		  	#define BTN_EN1 50
		  	#define BTN_EN2 52
		  	#define BTN_ENC 48
			
		  	#define BTN_BACK 71

		  	#undef SDSS
		 	#define SDSS  10
          	#define SDCARDDETECT 14
          
		#elif defined(SSD1306_OLED_I2C_CONTROLLER)
      		#define BTN_EN1 50
          	#define BTN_EN2 52
          	#define BTN_ENC 48
          	#define BEEPER 41
          	#define LCD_SDSS 10
          	#define SDCARDDETECT 14
			#define KILL_PIN -1

		// Sparklabs Full Graphic Display for RADDS
		#elif defined(SPARK_FULL_GRAPHICS)
			#define LCD_PINS_D4 29
			#define LCD_PINS_ENABLE 27
			#define LCD_PINS_RS 25

			#define BTN_EN1 35
			#define BTN_EN2 33
			#define BTN_ENC 37

			#define KILL_PIN -1
    		#undef BEEPER
			#define BEEPER -1
		#endif // SPARK_FULL_GRAPHICS

	#endif

#endif //ULTRA_LCD

#if defined(U8GLIB_SSD1306)
    #define ULTRA_LCD  //general LCD support, also 16x2
    #define DOGLCD  // Support for I2C LCD 128x64 (Controller SSD1306 graphic Display Family)
#endif

    #define NEWPANEL
    #define SSD1306_OLED_I2C_CONTROLLER

schaltung.jpg

#define ENCODER_PULSES_PER_STEP 2
#define ENCODER_STEPS_PER_MENU_ITEM 1 
#define ULTIPANEL 
#define LCD_FEEDBACK_FREQUENCY_DURATION_MS 100
#define LCD_FEEDBACK_FREQUENCY_HZ 1000

Quote
Enif
As for the I2C problem on the Arduino Due that caused some conflict when activating simultaneously the I2C OLED (using the U8glib I2C routines) and the I2C EEPROM (using Arduino's Wire.h), I have made some progress:

I removed the '//' from the (3 each) commented out statements "//u8g->pin_list[U8G_PI_SET_A0] = 1;" and "// u8g_i2c_stop();" in file U8glib/utility/u8g_com_arduino_ssd_i2c.c :

$diff u8g_com_arduino_ssd_i2c.c.ori u8g_com_arduino_ssd_i2c.c
125c125
<       //u8g->pin_list[U8G_PI_SET_A0] = 1;
---
>       u8g->pin_list[U8G_PI_SET_A0] = 1;
130c130
<       // u8g_i2c_stop();
---
>       u8g_i2c_stop();
134c134
<       //u8g->pin_list[U8G_PI_SET_A0] = 1;
---
>       u8g->pin_list[U8G_PI_SET_A0] = 1;
146c146
<       // u8g_i2c_stop();
---
>       u8g_i2c_stop();
150c150
<       //u8g->pin_list[U8G_PI_SET_A0] = 1;
---
>       u8g->pin_list[U8G_PI_SET_A0] = 1;
163c163
<       // u8g_i2c_stop();
---
>       u8g_i2c_stop();

Quote
Enif
Essentially I had just to add some Wire.begin() statements to reinitialize the I2C lines in ConfigurationStore.cpp where the EEPROM is read and written

void _EEPROM_writeData(int &pos, uint8_t* value, uint8_t size) {
  uint8_t c;
  while(size--) {
    eeprom_write_byte((unsigned char*)pos, *value);
    _delay_ms(2);
    c = eeprom_read_byte((unsigned char*)pos);
    if (c != *value) {
      SERIAL_ECHO_START;
      SERIAL_ECHOLNPGM(MSG_ERR_EEPROM_WRITE);
    }
    pos++;
    value++;
  };
}
void _EEPROM_readData(int &pos, uint8_t* value, uint8_t size) {
  do {
    *value = eeprom_read_byte((unsigned char*)pos);
    pos++;
    value++;
  } while (--size);
}

--- ConfigurationStore.cpp.ori  2015-04-24 14:44:41.000000000 +0200
+++ ConfigurationStore.cpp      2016-01-14 11:29:17.421633493 +0100
@@ -99,6 +99,9 @@
    #include "mesh_bed_leveling.h"
 #endif  // MESH_BED_LEVELING
 
+
+#include  < Wire.h>                          // I2C library (
+
 void _EEPROM_writeData(int &pos, uint8_t* value, uint8_t size) {
   uint8_t c;
   while(size--) {
@@ -120,6 +123,7 @@
     value++;
   } while (--size);
 }
+
 #define EEPROM_WRITE_VAR(pos, value) _EEPROM_writeData(pos, (uint8_t*)&value, sizeof(value))
 #define EEPROM_READ_VAR(pos, value) _EEPROM_readData(pos, (uint8_t*)&value, sizeof(value))
 
@@ -135,6 +139,7 @@
   float dummy = 0.0f;
   char ver[4] = "000";
   int i = EEPROM_OFFSET;
+  Wire.begin();
   EEPROM_WRITE_VAR(i, ver); // invalidate data first
   EEPROM_WRITE_VAR(i, axis_steps_per_unit);
   EEPROM_WRITE_VAR(i, max_feedrate);
@@ -289,6 +294,7 @@
 
 void Config_RetrieveSettings() {
 
+  Wire.begin();
   int i = EEPROM_OFFSET;
   char stored_ver[4];
   char ver[4] = EEPROM_VERSION;

// SH1106 OLED generic display support
// ==> REMEMBER TO INSTALL U8glib to your ARDUINO library folder: [code.google.com]
//#define U8GLIB_SH1106

// SSD1306 OLED generic display support
// ==> REMEMBER TO INSTALL U8glib to your ARDUINO library folder: [code.google.com]
//#define U8GLIB_SSD1306