LCD Name, Value, Units

LCD Name, Value, Units

 

 

Functional Description

Driver Properties

Driver Specifications

Interface Schematic

 

Functional Description

This LCD driver supports a two or four line by 16-character Hitachi HD44780 based LCD (or functional equivalent).  The driver displays a signed 16 bit value with a units string and associated label.  The label string is displayed on the upper line with the signed value and units string displayed on the line beneath it.  The value can be displayed as a decimal or hexadecimal number.

 

A two line display will support one instance of this driver.  A four line display will support two instances of this driver, one using rows 0 and 1 and the other using rows 2 and 3.  When using multiple LCD drivers within a project, the position properties must be selected such that driver display regions do not conflict.

 

Hardware Interface: Control of the LCD driver chip uses seven I/O pins.  These pins must be on the same PSoC port.  The driver uses a 4-bit communications interface.

 

Software Interface: The driver display value is provided as a 16-bit signed value.

 

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Driver Properties

User Configurable Properties:

 

·        Row Location:  Selects which lines of the LCD display the data value and associated bar graph. The displayed data occupies two lines of the display.  The location can be specified as “Rows 0- or “Rows 2-. Set the property to “Rows 0- for a two line display.

 

·         Label:  Text string associated with the value. Limited to 16 characters. An underscore character (‘_’) will be replaced by a space in the displayed text.

 

·        Units:  Text string indicating the units for the displayed value. Limited to eight characters. An underscore character (‘_’) will be replaced by a space in the displayed text.

 

·        Base: Selects the base or radix to be used to display the value: decimal or hexadecimal.

 

   Non-Configurable Properties:

 

·        BarGraph : Disable

 

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Driver Specifications

            This driver has no specifications.

 

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Interface Schematic

 

 

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