public static bool DelcomLEDAction(uint hUSB, LightColors color, LightStates action)
{
bool success = false;
//lock here so multiple threads don't try to toggle LEDs at once
//(though presently only one instance of the program works with the light at a time anyway)
lock (DelcomLightWrapper.CurrentLEDStates)
{
LightStates dictVal;
if (DelcomLightWrapper.CurrentLEDStates.TryGetValue(color, out dictVal) && dictVal == action)
{
//that LED is already in appropriate state
success = true;
}
else
{
for (int i = 0; i < LEDMaxFailures; i++)
{
if (Delcom.DelcomLEDControl(hUSB, (byte)color, (byte)action) == 0)
{
DelcomLightWrapper.CurrentLEDStates[color] = action;
success = true;
break;
}
else
{
System.Threading.Thread.Sleep(LEDWaitTime);
}
}
}
}
return(success);
}
/// <summary>
/// Internal method to set a single color of light.
/// </summary>
private bool SetSingleLight(DelcomLightColor color, DelcomLightState newState)
{
bool result = false;
lock (this.lightStates)
{
DelcomLightState currentState;
if (this.lightStates.TryGetValue(color, out currentState) && currentState == newState)
{
// This color is already in appropriate state.
result = true;
}
else
{
for (int i = 0; i < DelcomLightWrapper.MaxLightRetries; i++)
{
if (Delcom.DelcomLEDControl(this.deviceHandle, (byte)color, (byte)newState) == 0)
{
this.lightStates[color] = newState;
result = true;
break;
}
else
{
// Not to log each failure because a) API does not provide any error detail and
// b) caller will make an error log if all retries fail.
System.Threading.Thread.Sleep(DelcomLightWrapper.LightRetryInterval);
}
}
}
}
return(result);
}
public static bool DelcomLEDAllAction(uint hUSB, LightStates action)
{
bool success = false;
List <LightColors> lightsRemaining = new List <LightColors>();
//lock here so multiple threads don't try to toggle LEDs at once
//(though presently only one instance of the program works with the light at a time anyway)
lock (DelcomLightWrapper.CurrentLEDStates)
{
foreach (KeyValuePair <LightColors, LightStates> lightAndState in DelcomLightWrapper.CurrentLEDStates)
{
if (lightAndState.Value != action)
{
lightsRemaining.Add(lightAndState.Key);
}
}
if (lightsRemaining.Count == 0)
{
//all LEDs already in appropriate state
success = true;
}
else
{
for (int i = 0; i < LEDMaxFailures; i++)
{
List <LightColors> lightsFailed = new List <LightColors>();
foreach (LightColors remainingLight in lightsRemaining)
{
if (Delcom.DelcomLEDControl(hUSB, (byte)remainingLight, (byte)action) == 0)
{
DelcomLightWrapper.CurrentLEDStates[remainingLight] = action;
}
else
{
lightsFailed.Add(remainingLight);
}
}
if (lightsFailed.Count == 0)
{
success = true;
break;
}
lightsRemaining = lightsFailed;
System.Threading.Thread.Sleep(LEDWaitTime);
}
}
}
return(success);
}
/// <summary>
/// Helper method to set the light value to the currently managed states upon reconnection.
/// This is inteneded after the reconnection and we do not make retry opertaion.
/// In the worst case, the light state becomes bad state, but next regular request will fix it.
/// </summary>
private bool ResyncLights()
{
bool result = true;
var colors = new List <DelcomLightColor>(this.lightStates.Keys);
foreach (var lightColorState in lightStates)
{
Delcom.DelcomLEDControl(this.deviceHandle, (byte)lightColorState.Key, (byte)lightColorState.Value);
}
return(result);
}
internal override void TurnOff()
{
Delcom.DelcomLEDControl(_device, Delcom.BLUELED, Delcom.LEDOFF);
}
internal override void ChangeColourToAmber()
{
Delcom.DelcomLEDControl(_device, Delcom.YELLOWLED, Delcom.LEDON);
}
internal override void ChangeColourToGreen()
{
Delcom.DelcomLEDControl(_device, Delcom.GREENLED, Delcom.LEDON);
}
internal override void ChangeColourToRed()
{
Delcom.DelcomLEDControl(_device, Delcom.REDLED, Delcom.LEDON);
}
