private static void WriteData(byte data)
{
//set D/C pin 7 high for data
GPIOCmd.digitalWrite(4, 1);
WriteByte(data);
}
private static void WriteCommand(byte command)
{
//set D/C pin 7 low for command
GPIOCmd.digitalWrite(4, 0);
WriteByte(command);
ShortDelay();
}
private static bool InitDisplay()
{
bool result = false;
//Reset first!!
GPIOCmd.digitalWrite(17, 0);
ShortDelay();
GPIOCmd.digitalWrite(17, 1); //release reset
ShortDelay();
// Init sequence for 128x64 OLED module
WriteCommand(SSD1306_DISPLAYOFF); // 0xAE
WriteCommand(SSD1306_SETDISPLAYCLOCKDIV); // 0xD5
WriteCommand(0x80); // the suggested ratio 0x80
WriteCommand(SSD1306_SETMULTIPLEX); // 0xA8
WriteCommand(0x3F);
WriteCommand(SSD1306_SETDISPLAYOFFSET); // 0xD3
WriteCommand(0x0); // no offset
WriteCommand(SSD1306_SETSTARTLINE | 0x0); // line #0
WriteCommand(SSD1306_CHARGEPUMP); // 0x8D
WriteCommand(0x14); //I always use the onboard switcher
WriteCommand(SSD1306_MEMORYMODE); // 0x20
WriteCommand(0x00); // 0x0 act like ks0108
WriteCommand(SSD1306_SEGREMAP | 0x1);
WriteCommand(SSD1306_COMSCANDEC);
WriteCommand(SSD1306_SETCOMPINS); // 0xDA
WriteCommand(0x12);
WriteCommand(SSD1306_SETCONTRAST); // 0x81
WriteCommand(0xCF); //I always use the onboard switcher
WriteCommand(SSD1306_SETPRECHARGE); // 0xd9
WriteCommand(0xF1); //I always use the onboard switcher
WriteCommand(SSD1306_SETVCOMDETECT); // 0xDB
WriteCommand(0x40);
WriteCommand(SSD1306_DISPLAYALLON_RESUME); // 0xA4
WriteCommand(SSD1306_NORMALDISPLAY); // 0xA6
//Finally turn on the display
WriteCommand(SSD1306_DISPLAYON);
//WriteCommand(SSD1306_DISPLAYALLON); //Screen should be white here!!
return(result);
}
public static int RunTest()
{
//Init PiIO library
int result = Init.Setup();
if (result == -1)
{
Console.WriteLine("PiIO init failed!");
return(result);
}
//Init PiIO SPI library
result = SPICmd.Setup(0, 20000000);;
if (result == -1)
{
Console.WriteLine("SPI init failed!");
return(result);
}
Console.WriteLine("SPI init completed, using channel 0 at 20MHz for OLED Display");
//Now initialise the OLED device and write a hello world message on it!
//GPIO4 is used for data/~command in 4 wire spi mode
GPIOCmd.pinMode(4, (int)GPIOCmd.GPIOpinmode.Output);
GPIOCmd.pinMode(17, (int)GPIOCmd.GPIOpinmode.Output);
InitDisplay();
WriteCommand(SSD1306_INVERTDISPLAY);
ShortDelay();
WriteCommand(SSD1306_NORMALDISPLAY);
ClearScreen();
WriteScreen();
ShortDelay();
ShortDelay();
SetScreen();
WriteScreen();
ShortDelay();
ShortDelay();
ClearScreen();
WriteScreen();
while (true)
{
//Write Hello World on display
ShortDelay();
ShortDelay();
WriteText(" " + System.DateTime.Now.ToLongTimeString());
ShortDelay();
ShortDelay();
WriteScreen();
ShortDelay();
ShortDelay();
ShortDelay();
ShortDelay();
InitDisplay();
}
}
