Functions
uint16_t	halBulbPwmDriverFrequencyCallback (void)
	A callback used to configure the frequency of the PWM driver. This is called by the bulb-pwm driver upon initialization to determine the frequency at which the PWM driver should be driven. It should return either the frequency, in Hz, or USE_DEFAULT_FREQUENCY to indicate that the plugin should use the default value. The default value is 1000 Hz, but can be overridden by a macro in the board header if a user wishes.

void	halBulbPwmDriverInitCompleteCallback (void)
	Function to indicate that the PWM driver has been initialized and the bulb should drive the initial LED PWM values at this time.

void	halBulbPwmDriverBlinkOnCallback (void)
	This callback is generated during blinking behavior when it is time to turn the bulb on. While the plugin will determine when to blink the bulb on or off, it is up to this callback to determine how to turn the bulb on.

void	halBulbPwmDriverBlinkOffCallback (void)
	This callback is generated during blinking behavior when it is time to turn the bulb off. While the plugin will determine when to blink the bulb on or off, it is up to this callback to determine how to turn the bulb off.

void	halBulbPwmDriverBlinkStartCallback (void)
	This callback is generated when the application layer makes a call to initiate blinking behavior. It warns the application layer PWM code to not attempt to drive the LEDs directly and interfere with the blinking behavior.

void	halBulbPwmDriverBlinkStopCallback (void)
	This callback is generated when the current blinking command finishes. The application layer PWM code must then determine what the bulb drive should be, based on the current appliation layer attributes (i.e. level, on/off, color XY, etc.)