#include "stm32l100c_discovery.h"

#include "ssd1306.h"

// Write command to OLED

void WriteCommand(unsigned char command)

{

  SSD_A0_Low();

  SPI_SendByte(command);

  SPI_Wait();

}

// Write data to OLED

void WriteData(unsigned char data)

{

  SSD_A0_High();

  SPI_SendByte(data);

  SPI_Wait();

}

// Initialize OLED

void ssd1306_Init(void)

{

  /* Generate a reset */

  SSD_Reset_Low();

  uint32_t i;

  for(i=5000; i>1; i--) 

  SSD_Reset_High();

  WriteCommand(0xAE);

  WriteCommand(0xD5);

  WriteCommand(0x80);

  WriteCommand(0xA8);

  WriteCommand(0x1F);

  WriteCommand(0xD3);

  WriteCommand(0x00);

  WriteCommand(0x40 | 0x00); // line #0

  WriteCommand(0x8D);

  WriteCommand(0x14); //10 or 14 if not externalvcc

  WriteCommand(0x20);

  WriteCommand(0x00);

  WriteCommand(0xA0 | 0x1); // segremap

  WriteCommand(0xC8); // comscandep

  WriteCommand(0xDA); // setcompins 

  WriteCommand(0x02);

  WriteCommand(0x81); // contrast

  WriteCommand(0x0F); // contrast value. 8f is a good one.

  WriteCommand(0xD9);

  WriteCommand(0xF1); //22 or F1 if not externalvcc