Matrix-orbital VFD2041 User Manual download pdf (Page 32)

Syntax

Hexadecimal 0xFE 0x4E [refID] [data]

Decimal 254 78 [refID] [data]

ASCII 254 “N” [refID] [data]

Parameters

Parameter Length Description

refID 1 Character reference ID (0-7).

data 8 Character data.

Description The VFD2041 allows for upta to eight custom deﬁned characters to be

added onto the the character set. A custom character is a ﬁve by eight

pixel matrix with each row represented by a byte value. For example:

Custom Character ’h’ Decimal Hex

1 0 0 0 0 16 0x10

1 0 1 1 0 22 0x16

1 1 0 0 1 25 0x19

1 0 0 0 1 17 0x11

Each bit value of one, in the table, represents an onpixel, whereas a value

of zero represents a pixel that is turned off. Therefore in order to deﬁne

custom character ’h’ you would send the command byte preﬁx 254 fol-

lowed by the command 78. Next, you will have to select the memory

location in which you wish to save the character in. The available mem-

ory locations for this command are zero through to seven. After sending

the memorylocation, or [refID],you may then send the eight byte custom

character data in sequence from the top to the bottom.

Once you have deﬁned a custom character you may display it by sending

the display module the [refID]. For example if a custom character was

saved in position one, the command to display the custom character, at

the current cursor position, would be simply to send the number one to

the display module without quotes.

Remembered No

6.3 Saving Custom Characters

Syntax

Hexadecimal 0xFE 0xC1 [Bank] [ID] [Data]

Decimal 254 193 [Bank] [ID] [Data]

Parameters

Parameter Length Description

Bank 1 Memory bank to save to (0-4).

ID 1 Character ID (0-7)

Data 8 Character Deﬁnition

Matrix Orbital VFD2041 28

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 52 53

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Matrix-orbital VFD2041 User Manual Page 32