private async void InitI2C() {
byte[] i2CWriteBuffer;
byte[] i2CReadBuffer;
byte bitMask;
// Inicjalizacja I2C - urządzenie z RPI2
string deviceSelector = I2cDevice.GetDeviceSelector();
var i2cDeviceControllers = await DeviceInformation.FindAllAsync(deviceSelector);
if (i2cDeviceControllers.Count == 0) {
return;
}
//Ustawienia dla MCP230008
var i2cSettings = new I2cConnectionSettings(I2C_ADDR_MCP23008);
i2cSettings.BusSpeed = I2cBusSpeed.FastMode;
i2cMCP23008 = await I2cDevice.FromIdAsync(i2cDeviceControllers[0].Id, i2cSettings);
if (i2cMCP23008 == null) {
return;
}
//Ustawienia dla PCF8591
i2cSettings.SlaveAddress = I2C_ADDR_PCF8591;
i2cPCF8591 = await I2cDevice.FromIdAsync(i2cDeviceControllers[0].Id, i2cSettings);
if (i2cPCF8591 == null) {
return;
}
//Ustawienia dla Arduino
i2cSettings.SlaveAddress = I2C_ADDR_ARDUINO;
i2cArduino = await I2cDevice.FromIdAsync(i2cDeviceControllers[0].Id, i2cSettings);
if (i2cArduino == null) {
return;
}
// Inicjalizacja port Expander
// Za: https://ms-iot.github.io/content/en-US/win10/samples/I2CPortExpander.htm
try {
i2CReadBuffer = new byte[1];
i2cMCP23008.WriteRead(new byte[] { MCP23008_IODIR }, i2CReadBuffer);
iodirRegister = i2CReadBuffer[0];
i2cMCP23008.WriteRead(new byte[] { MCP23008_GPIO }, i2CReadBuffer);
gpioRegister = i2CReadBuffer[0];
i2cMCP23008.WriteRead(new byte[] { MCP23008_OLAT }, i2CReadBuffer);
olatRegister = i2CReadBuffer[0];
// Konfiguracja PIN-a z laserem na 1; reszta bez zmian
olatRegister |= LED_GPIO_PIN;
i2CWriteBuffer = new byte[] { MCP23008_OLAT, olatRegister };
i2cMCP23008.Write(i2CWriteBuffer);
bitMask = (byte)(0xFF ^ LED_GPIO_PIN); // Tylko nasz PIN będzie miał maskę 0 - reszta będzie równa 1, co spowoduje że nie zmienią wartości
iodirRegister &= bitMask;
i2CWriteBuffer = new byte[] { MCP23008_IODIR, iodirRegister };
i2cMCP23008.Write(i2CWriteBuffer);
} catch (Exception e) {
return;
}
//Komunikacja z Arduino
byte[] wbuffer = new byte[] { 1, 2, 3, 4, 5, 6 };
byte[] rbuffer = new byte[2];
//Wysłanie liczb do dodania
i2cArduino.Write(wbuffer);
await Task.Delay(1000);
//Odczytanie wyniku
var result = i2cArduino.ReadPartial(rbuffer);
//Wyświetlenie
int sum = (((int)rbuffer[1]) << 8) + (int)rbuffer[0];
Debug.WriteLine($"Suma:{sum}");
//Błyskanie laserem co sekundę
m_timer = new DispatcherTimer();
m_timer.Interval = TimeSpan.FromMilliseconds(1000);
m_timer.Tick += timer_Tick;
m_timer.Start();
//Zapis "trójkąta" do PCF8591 (w pętli, nieskończonej)
await WritePCF8591();
}
// set the PWM frequency for the servos on the specified servo controll board
private static void setPWMFreq(I2cDevice board, int freq)
{
double preScale = 25000000.0;
preScale /= 4096;
preScale /= (float)freq;
preScale -= 1.0;
preScale = Math.Floor(preScale + .5);
var oldMode = board.ReadPartial(new byte[] { (byte)(PCA9685_REG_MODE1) });
var newMode = (oldMode.BytesTransferred & 0x7F) | 0x10;
board.Write(new byte[] { (byte)PCA9685_REG_MODE1, (byte)(newMode) });
board.Write(new byte[] { (byte)PCA9685_REG_PRESCALE, (byte)(Math.Floor(preScale)) });
board.Write(new byte[] { (byte)PCA9685_REG_MODE1, (byte)(oldMode.BytesTransferred) });
board.Write(new byte[] { (byte)PCA9685_REG_MODE1, (byte)(oldMode.BytesTransferred | 0x80) });
}
