//This loop polls the aio value set by the trimpot to determine the duty cycle which
// determines the amplitude on the sin curve of a given itteration.
private void SinLEDLoop(AnalogInput pot, PWM led, OutputPort relay, LCD_Display display)
{
double startValue = 0;
bool laststate = false;
double potValue = 0.0;
TimeSpan lastPeak = Utility.GetMachineTime();
while (true)
{
potValue = pot.Read();
startValue += .5 * potValue;
if (startValue > 2 * System.Math.PI)
{
startValue = 0;
laststate = !laststate;
//relay.Write(laststate);
if (display != null)
{
display.writeValue("Frequency: " + getFreq(lastPeak) + " Hz");
}
lastPeak = Utility.GetMachineTime();
}
Thread.Sleep(5);
led.DutyCycle = System.Math.Max(0, System.Math.Sin(startValue));
}
}
public PWM_AIO_Demo_Main()
{
//AIO pin connected to arbitrary range potentiometer.
AnalogInput pot = new AnalogInput(AnalogChannels.ANALOG_PIN_A0);
pot.Scale = 1; //sets range value that is returned by aio read()
/*
* Spawn task to poll DHT11 temp/humid sensor.
* This polling takes time and the quality of the hardware/driver mean the
* polling takes inconsistent amounts of time. Also, the read operation is
* subject to timeouts which should not be allowed to suspend other tasks.
*/
Thread analogReadTask = new Thread(new ThreadStart(new AnalogReadClass().PollTempHumidity));
analogReadTask.Start();
//Spin untill task spawn completes
while (!analogReadTask.IsAlive)
{
;
}
//initialize PWM properties before handoff to forever loop
double freq = 1000;
double duty = .5;
OutputPort onboardLed = new OutputPort(Pins.ONBOARD_LED, false);
PWM led = new PWM(PWMChannels.PWM_PIN_D5, freq, duty, false);
//Another output port to drive transistor, which drives coil of relay.
OutputPort relay = new OutputPort(Pins.GPIO_PIN_D0, false);
//Starts pwm channel at initialized rate/duty
//Will be modified by pollwrite loop
led.Start();
LCD_Display Display = new LCD_Display(0x27, 20, 4);
Display.writeValue("Good");
//loop forever to get AIO value and set led pwm
PollAndWriteLoop(pot, led, relay);
}
public AnalogReadClass(LCD_Display display, int period)
{
this.display = display;
this.period = period;
}
public PWM_AIO_Demo_Main()
{
//AIO pin connected to arbitrary range potentiometer.
AnalogInput pot = new AnalogInput(AnalogChannels.ANALOG_PIN_A0);
pot.Scale = 1; //sets range value that is returned by aio read()
/*
* Spawn task to poll DHT11 temp/humid sensor.
* This polling takes time and the quality of the hardware/driver mean the
* polling takes inconsistent amounts of time. Also, the read operation is
* subject to timeouts which should not be allowed to suspend other tasks.
*/
Thread analogReadTask = new Thread(new ThreadStart(new AnalogReadClass().PollTempHumidity));
analogReadTask.Start();
//Spin untill task spawn completes
while (!analogReadTask.IsAlive) ;
//initialize PWM properties before handoff to forever loop
double freq = 1000;
double duty = .5;
OutputPort onboardLed = new OutputPort(Pins.ONBOARD_LED, false);
PWM led = new PWM(PWMChannels.PWM_PIN_D5, freq, duty, false);
//Another output port to drive transistor, which drives coil of relay.
OutputPort relay = new OutputPort(Pins.GPIO_PIN_D0, false);
//Starts pwm channel at initialized rate/duty
//Will be modified by pollwrite loop
led.Start();
LCD_Display Display = new LCD_Display(0x27, 20, 4);
Display.writeValue("Good");
//loop forever to get AIO value and set led pwm
PollAndWriteLoop(pot, led, relay);
}
public AnalogReadClass(LCD_Display display, int period)
{
this.display = display;
this.period = period;
}
//This loop polls the aio value set by the trimpot to determine the duty cycle which
// determines the amplitude on the sin curve of a given itteration.
private void SinLEDLoop(AnalogInput pot, PWM led, OutputPort relay, LCD_Display display )
{
double startValue = 0;
bool laststate = false;
double potValue = 0.0;
TimeSpan lastPeak = Utility.GetMachineTime();
while (true)
{
potValue = pot.Read();
startValue += .5 * potValue;
if (startValue > 2 * System.Math.PI)
{
startValue = 0;
laststate = !laststate;
//relay.Write(laststate);
if (display != null)
display.writeValue("Frequency: " + getFreq(lastPeak) + " Hz");
lastPeak = Utility.GetMachineTime();
}
Thread.Sleep(5);
led.DutyCycle = System.Math.Max(0, System.Math.Sin(startValue));
}
}
