void Idle(object sender, ElapsedEventArgs e)
{
lock (this)
{
timerExpired = true;
pwm.Disable();
}
}
static void RunKeyboard()
{
WriteLine($"Pulse Width Modulation Test on GPIO 18");
WriteLine($"Using keyboard input parameters");
string s;
double p = 0.1;
double d = 0.5;
using (var pwm = new PwmChannel(0, 0))
{
while (true)
{
WriteLine($"Running PWM period {p}ms and duty cycle {d}.");
pwm.Disable();
pwm.Period = (ulong)(p * 1_000_000d);
pwm.DutyCycle = d;
Pi.Wait(1);
pwm.Enable();
WriteLine($"Enter pulse period in milliseconds ({p}ms):");
s = ReadLine();
if (string.IsNullOrWhiteSpace(s))
{
s = p.ToString();
}
if (!double.TryParse(s, out p) || p <= 0)
{
break;
}
WriteLine($"Enter duty cycle in percent ({d}):");
s = ReadLine();
if (string.IsNullOrWhiteSpace(s))
{
s = d.ToString();
}
if (!double.TryParse(s, out d) || d <= 0 || d >= 1)
{
break;
}
}
pwm.Disable();
}
}
static void RunEncoder()
{
WriteLine($"Pulse Width Modulation Test on GPIO 18");
WriteLine($"Using rotary encoder");
var running = true;
var pwm = new PwmChannel(0, 0);
var period = 0.1d;
WriteLine($"Running PWM with period of {period}ms.");
pwm.Period = (ulong)(period * 1_000_000d);
pwm.DutyCycle = 0.5d;
pwm.Enable();
var button = Pi.Gpio.Pin(25, PinKind.InputPullUp);
button.OnRisingEdge += (sender, args) =>
{
if (args.Bounced)
{
return;
}
running = false;
};
var left = Pi.Gpio.Pin(23, PinKind.InputPullUp);
var right = Pi.Gpio.Pin(24, PinKind.InputPullUp);
left.OnRisingEdge += (sender, args) =>
{
if (args.Bounced)
{
return;
}
if (left.Value == right.Value)
{
period *= 0.9d;
}
else
{
period *= 1d / 0.9d;
}
pwm.Period = (ulong)(period * 1_000_000d);
WriteLine($"Changed PWM period to {period}ms.");
};
try
{
while (running)
{
Pi.Wait(50);
}
}
finally
{
button.RemoveEvents();
button.Dispose();
left.RemoveEvents();
left.Dispose();
pwm.Disable();
pwm.Dispose();
}
}