MY9221 Class Reference

Public Member Functions
	MY9221 (int dataPin, int clockPin, int instances=1)
virtual	~MY9221 ()
void	setAutoRefresh (bool enable)
void	setLED (int led, bool on)
void	setLowIntensityValue (int intensity)
void	setHighIntensityValue (int intensity)
void	setAll ()
void	clearAll ()
void	refresh ()

Protected Attributes
my9221_context	m_my9221

Constructor & Destructor Documentation

MY9221	(	int	dataPin,
		int	clockPin,
		int	instances = 1
	)

Instantiates an MY9221 object

Parameters

dataPin	Data pin
clockPin	Clock pin
instances	Number of daisy-chained my9221s, default 1

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~MY9221 ( )

virtual

MY9221 destructor

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Member Function Documentation

void setAutoRefresh ( bool  enable )

inline

Enable or disable auto refresh. When auto refresh is enabled, update the LED display as soon as the internal state changes. When false, the display(s) will not be updated until the refresh() method is called.

Parameters

enable

true to enable auto refresh, false otherwise

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void setLED	(	int	led,
		bool	on
	)

Set an LED to a specific on (high intensity) or off (low intensity) value.

Parameters

led	The LED whose state you wish to change
on	true to turn on the LED, false to turn the LED off

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void setLowIntensityValue

(

int

intensity

)

Set the greyscale intensity of an LED in the OFF state. The intensity is a value from 0 (fully off) to 255 (fully on). This will take effect on any future LED set or clear operations.

Parameters

intensity

a value from 0 (fully off) to 255 (fully on)

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void setHighIntensityValue

(

int

intensity

)

Set the greyscale intensity of an LED in the ON state. The intensity is a value from 0 (fully off) to 255 (fully on). This will take effect on any future LED set or clear operations.

Parameters

intensity

a value from 0 (fully off) to 255 (fully on)

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void setAll

(

)

Set all of the LEDS to the ON (high intensity value) state.

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void clearAll

(

)

Set all of the LEDS to the OFF (low intensity value) state.

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void refresh

(

)

Set the LED states to match the internal stored states. This is useful when auto refresh (setAutoRefresh()) is false to update the display.

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Inheritance diagram for MY9221:

Collaboration diagram for MY9221:

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The documentation for this class was generated from the following files:

• src/my9221/my9221.hpp
• src/my9221/my9221.cxx