mirror of
https://github.com/Klagarge/Cursor.git
synced 2024-11-30 04:43:26 +00:00
188 lines
11 KiB
Plaintext
188 lines
11 KiB
Plaintext
-- filename: LCD_usage.vhd
|
|
-- kind: txt file
|
|
--------------------------------------------------------------------------------
|
|
-- History:
|
|
-- v1.0 : zas 22.08.2013 -- Initial Version
|
|
--------------------------------------------------------------------------------
|
|
-- Description:
|
|
-- Explanation about the usage and the functionalities of the LCD Driver.
|
|
--------------------------------------------------------------------------------
|
|
|
|
--------------------------------------------------------------------------------
|
|
-- Overview
|
|
--
|
|
The Lcd and Lcd_test library is intended to use with the HEB_LCD_V2_0, see
|
|
http://wiki.hevs.ch/uit/index.php5/Hardware/Parallelport/heb_lcd.
|
|
|
|
The HEB_LCD_V2_0 features a EADOGM132-5 LCD. Its a 4 Line and 132 column black-
|
|
light display. The font created for it uses 6 columns per character which allows
|
|
to have 4 lines with 22 characters each.
|
|
|
|
The connection is I2C based and some initial configuration needs to be done. The
|
|
bloc lcdController has everything needed to use the LCD. See the vague toplevel
|
|
overview below.
|
|
|
|
+--------------------------------------------------------------------------+
|
|
| +---------------------+ +----------------+ +---------------+ |
|
|
| | lcdCharacterEncoder |---->| lcdInitialiser |------>| lcdSerialiser | |
|
|
| +---------------------+ +----------------+ +---------------+ |
|
|
| ^ |
|
|
| | +-------------+ |
|
|
| +--------| bramMemory | |
|
|
| lcdController +-------------+ |
|
|
+--------------------------------------------------------------------------+
|
|
|
|
--------------------------------------------------------------------------------
|
|
-- Bloc description
|
|
--
|
|
lcdController -- Main bloc containing all needed subblocs
|
|
lcdCharacterEncoder -- This bloc receives the ASCII data to display and
|
|
and converts it to display data or display commands
|
|
bramMemory -- Contains the command for command chars (<0x20) and
|
|
the display (pixel) data for a the symbol chars
|
|
(>=0x20).
|
|
All the data of this ram are stored inthe font.txt file
|
|
lcdInitialiser -- This bloc lets send predefined commands for 2
|
|
features. One is for initialising the display in the
|
|
beginning, and the other is for clear all data from
|
|
the display
|
|
lcdSerialiser -- This bloc takes the parallised data and sends them
|
|
over the I2C bus.
|
|
|
|
--------------------------------------------------------------------------------
|
|
-- Supported Characters
|
|
--
|
|
In VHDL the characters can be written with the following command:
|
|
character'pos("VHDL")
|
|
where VHDL is inidicated in the table below.
|
|
|
|
Hex VHDL Value Description Function
|
|
-----------------------------------------------------------
|
|
0x00 "nul" Null Not supported
|
|
0x01 "soh" Start of Header Not supported
|
|
0x02 "stx" Start of Text (0,0) Goto pos line 0 character 0
|
|
0x03 "etx" End of Text (3,21) Goto pos line 3 character 21
|
|
0x04 "eot" End of Transmission Not supported
|
|
0x05 "enq" Enquiry Not supported
|
|
0x06 "ack" Acknowledgment Not supported
|
|
0x07 "bel" Bell Not supported
|
|
0x08 "bs" Backspace (y,x-1) Jump one char back
|
|
0x09 "ht" Horizontal Tab Not supported
|
|
0x0A "lf" Line Feed (y+1,x)Goto next line
|
|
0x0B "vt" Vertical Tab (y-1,x) Goto previous line
|
|
0x0C "ff" Form Feed Not supported
|
|
0x0D "cr" Carriage Return (y,0) Goto beginning of line
|
|
0x0E "so" Shift Out Not supported
|
|
0x0F "si" Shift In Not supported
|
|
0x10 "dle" Data Link Escape Not supported
|
|
0x11 "dc1" XON Device Control 1 Not supported
|
|
0x12 "dc2" Device Control 2 Not supported
|
|
0x13 "dc3" XOFFDevice Control 3 Not supported
|
|
0x14 "dc4" Device Control 4 Not supported
|
|
0x15 "nak" Negativ Acknowledgemnt Not supported
|
|
0x16 "syn" Synchronous Idle Not supported
|
|
0x17 "etb" End of Trans. Block Not supported
|
|
0x18 "can" Cancel Clear entire display
|
|
0x19 "em" End of Medium Not supported
|
|
0x1A "sub" Substitute Not supported
|
|
0x1B "esc" Escape Not supported
|
|
0x1C "fsp" File Separator Not supported
|
|
0x1D "gsp" Group Separator Not supported
|
|
0x1E "rsp" Reqst to SendRec. Sep. Not supported
|
|
0x1F "usp" Unit Separator Not supported
|
|
0x20 " " Space Print char
|
|
0x21 "!" exclamation mark Print char
|
|
0x22 """ double quote Print char
|
|
0x23 "#" number sign Print char
|
|
0x24 "$" dollar sign Print char
|
|
0x25 "%" percent Print char
|
|
0x26 "&" ampersand Print char
|
|
0x27 "'" single quote Print char
|
|
0x28 "(" left/open parenthesis Print char
|
|
0x29 ")" right/closing parenth. Print char
|
|
0x2A "*" asterisk Print char
|
|
0x2B "+" plus Print char
|
|
0x2C "," comma Print char
|
|
0x2D "-" minus or dash Print char
|
|
0x2E "." dot Print char
|
|
0x2F "/" forward slash Print char
|
|
0x30 "0" Print char
|
|
0x31 "1" Print char
|
|
0x32 "2" Print char
|
|
0x33 "3" Print char
|
|
0x34 "4" Print char
|
|
0x35 "5" Print char
|
|
0x36 "6" Print char
|
|
0x37 "7" Print char
|
|
0x38 "8" Print char
|
|
0x39 "9" Print char
|
|
0x3A ":" colon Print char
|
|
0x3B ";" semi-colon Print char
|
|
0x3C "<" less than Print char
|
|
0x3D "=" equal sign Print char
|
|
0x3E ">" greater than Print char
|
|
0x3F "?" question mark Print char
|
|
0x40 "@" AT symbol Print char
|
|
0x41 "A" Print char
|
|
0x42 "B" Print char
|
|
0x43 "C" Print char
|
|
0x44 "D" Print char
|
|
0x45 "E" Print char
|
|
0x46 "F" Print char
|
|
0x47 "G" Print char
|
|
0x48 "H" Print char
|
|
0x49 "I" Print char
|
|
0x4A "J" Print char
|
|
0x4B "K" Print char
|
|
0x4C "L" Print char
|
|
0x4D "M" Print char
|
|
0x4E "N" Print char
|
|
0x4F "O" Print char
|
|
0x50 "P" Print char
|
|
0x51 "Q" Print char
|
|
0x52 "R" Print char
|
|
0x53 "S" Print char
|
|
0x54 "T" Print char
|
|
0x55 "U" Print char
|
|
0x56 "V" Print char
|
|
0x57 "W" Print char
|
|
0x58 "X" Print char
|
|
0x59 "Y" Print char
|
|
0x5A "Z" Print char
|
|
0x5B "[" left/opening bracket Print char
|
|
0x5C "\" back slash Print char
|
|
0x5D "]" right/closing bracket Print char
|
|
0x5E "^" caret/circumflex Print char
|
|
0x5F "_" underscore Print char
|
|
0x60 "`" Print char
|
|
0x61 "a" Print char
|
|
0x62 "b" Print char
|
|
0x63 "c" Print char
|
|
0x64 "d" Print char
|
|
0x65 "e" Print char
|
|
0x66 "f" Print char
|
|
0x67 "g" Print char
|
|
0x68 "h" Print char
|
|
0x69 "i" Print char
|
|
0x6A "j" Print char
|
|
0x6B "k" Print char
|
|
0x6C "l" Print char
|
|
0x6D "m" Print char
|
|
0x6E "n" Print char
|
|
0x6F "o" Print char
|
|
0x70 "p" Print char
|
|
0x71 "q" Print char
|
|
0x72 "r" Print char
|
|
0x73 "s" Print char
|
|
0x74 "t" Print char
|
|
0x75 "u" Print char
|
|
0x76 "v" Print char
|
|
0x77 "w" Print char
|
|
0x78 "x" Print char
|
|
0x79 "y" Print char
|
|
0x7A "z" Print char
|
|
0x7B "{" left/opening brace Print char
|
|
0x7C "|" vertical bar Print char
|
|
0x7D "}" right/closing brace Print char
|
|
0x7E "~" tilde Print char
|
|
0x7F "del" arrow to the left Print char |