Component: LCD SPI (MiniClick) (Alphanumeric): Difference between revisions

Latest revision as of 14:37, 13 July 2026

Author	Matrix Ltd
Version	1.0
Category	Alphanumeric

LCD SPI (MiniClick) component

Generic alphanumeric LCD display based on the standard Hitachi HD44780 controller IC. Connected using an SPI based MCP23S17 SPI IO Expander IC as used on the LCD Mini Click.

Detailed description

No detailed description exists yet for this component

Examples

No additional examples

Macro reference

Clear

	Clear
Clears the entire contents of the display.
- VOID	Return

ClearLine

	ClearLine
Clears a single line on the display and then moves the cursor to the start of the line to allow you to start populating the line with data.
- BYTE	Line
The line to clear, zero being the first (top) line of the display
- VOID	Return

Command

	Command
Use this method/macro to send a specific command to the LCD. Refer to the Matrix Multimedia EB006 datasheet for a list of supported instructions. For Non-Matrix LCD's refer to the manufacturers datasheet.
- BYTE	instruction
Send a defined command to the LCD Screen. See datasheet for supported commands.
- VOID	Return

Cursor

	Cursor
Moves the cursor on the LCD Display
- BYTE	x
Set the cursor position in the X plane, 0 is the left most cell
- BYTE	y
Set the cursor position in the Y plane, 0 is the top most cell
- VOID	Return

PrintAscii

	PrintAscii
Takes the ascii value for a character and prints the character
- BYTE	character
Holds an ascii value.
- VOID	Return

PrintFloat

	PrintFloat
Print a Float number rounded up to a specified amount of decimal places.
- FLOAT	Number
Enter the number or variable to print to the LCD
- BYTE	DecimalPlaces
Enter how many decimal places to round up to (1 - 6)
- VOID	Return

PrintFormattedNumber

	PrintFormattedNumber
Will allow you to print a number up to 32-bits with signed or unsigned formatting. Signed = -2147483648 to 2147483647 Unsigned = 0 to 4294967295
- ULONG	Number
Enter the number or variable to print to the LCD
- BOOL	Format
0=Signed, 1=Unsigned
- VOID	Return

PrintNumber

	PrintNumber
Based on v5 macro, will allow you to print a number. This is limited to a signed-INT, -32768 to 32767
- INT	Number
Enter the number or variable to print to the LCD
- VOID	Return

PrintString

	PrintString
Breaks down a string of text and sends it to the LCD via the private RawSend(byte, mask) macro
- STRING	Text
Enter the text or variable to print to the LCD
- VOID	Return

RAMWrite

	RAMWrite
Modifies the internal memory of the LCD to allow for up to 8 customised characters to be created and stored in the device memory
- BYTE	Index
Values 0 to 7
- BYTE	d0

- BYTE	d1

- BYTE	d2

- BYTE	d3

- BYTE	d4

- BYTE	d5

- BYTE	d6

- BYTE	d7

- VOID	Return

RawSend

	RawSend
Sends data to the LCD display
- BYTE	data
The data byte to send to the LCD
- BOOL	type
A boolean to indicate command type: true to write data, false to write a command
- VOID	Return

RemapCharacter

	RemapCharacter
Assigns a remap character allowing the PrintString function to automatically swap between pre-defined characters. The characters can be custom (in the range 0-9) or can point to an existing character in the LCD character map.
- BYTE	RemapIdx
Remap Index, Range: 0 to (Remap Characters - 1)
- BYTE	SearchCharacter
Character to look for a replace
- BYTE	ReplacementCharacter
New character value to use in place of the search character.
- VOID	Return

ScrollDisplay

	ScrollDisplay
Scrolls the display left or right by a number of given positions.
- BYTE	Position
Holds the number of positions to shift the display
- BYTE	Direction
0 = left, 1 = right
- VOID	Return

Start

	Start
Startup routine required by the hardware device. Automatically clears the display after initialising.
- VOID	Return

Property reference

	Properties
	Connections
	External Address
Selects the value of the three address pins for the MCP23S17.
	Channel
SPI Channel selector
	Prescale
Prescale option selector
	MOSI
SPI Data Out Pin SDO - Also Known as Master Out Slave In (MOSI) when used in Master mode.
	MOSI Remap Pin
Select which the target pin to assign the MOSI hardware pin functionality.
	MISO
SPI Data In Pin SDI - Also Known as Master In Slave Out (MISO) when used in Master mode.
	MISO Remap Pin
Select which the target pin to assign the MISO hardware pin functionality.
	CLK
SPI Clock Pin CLK - The Clock signal is driven by the SPI master.
	CLK Remap Pin
Select which the target pin to assign the CLK hardware pin functionality.
	CS / SS
Chip Select / Slave Select Pin Master Mode: General purpose output pin used to select the remote SPI device. Slave Mode: Hardware chip select pin input used to select the SPI device.
	Display Settings
	Rows
Number of lines of characters the LCD can display.
	Columns
Number of characters the LCD can display on a single line.
	Remap Characters
Used to allow characters to be replaced with alternate characters. Custom characters or characters from the LCD memory map can be used as replacements. Each replacement consumes two bytes of RAM memory and is applied automatically when printing strings.
	Delay Timings
Delay in microseconds used in the display send function. Most displays will work with the default value of 100us. Some displays may need a slightly longer delay, 166us is known to work well.
	Simulation
	Component Label

	User Label Text
Text to display
	Component Label Scale
The label scale can be change if the amout of text is too wide for the display
	Text Colour
Colour of the font characters drawn on the display
	Text Background
Colour surrounding the font characters drawn on the display
	Display Background
Colour of the background of the display
	Scope Traces
Selects if the scope traces are automatically generated or not
	Console Data
Selects if the console data is automatically generated or not
	API

	Connections
	Channel
SPI Channel selector
	Use Auto CS
Allow the SPI component to manage the CS pin for us in Master mode. On initialise the CS pin is automatically set high to disable the remote SPI device. Set to No if you want to create a component with multiple CS pins or if you want to manage the CS pin yourself.
	CS Polarity