Altera Embedded Peripherals IP - Manual (Page 121)

Sequence Meaning
CR (\r)
Moves the cursor to the start of the current
line.
LF (\n)
Moves the cursor to the start of the line and
move it down one line.
ESC ( (\x1B)
Starts a VT100 control sequence.
ESC [ ;
H
Moves the cursor to the y, x position
specified – positions are counted from the
top left which is 1;1.
ESC [ K
Clears from current cursor position to end of
line.
ESC [ 2 J
Clears the whole screen.
The LCD controller is an output-only device. Therefore, attempts to read from it returns immediately
indicating that no characters have been received.
The LCD controller drivers are not included in the system library when the Reduced device drivers
option is enabled for the system library. If you want to use the LCD controller while using small drivers
for other devices, add the preprocessor option—
DALT_USE_LCD_16207
to the preprocessor options.
Software Files
The LCD controller is accompanied by the following software files. These files define the low-level
interface to the hardware and provide the HAL drivers. Application developers should not modify these
files.
•
altera_avalon_lcd_16207_regs.h — This file defines the core's register map, providing symbolic constants
to access the low-level hardware.
• altera_avalon_lcd_16207.h , altera_avalon_lcd_16207.c — These files implement the LCD controller device
drivers for the HAL system library.
Register Map
The HAL device drivers make it unnecessary for you to access the registers directly. Therefore, Altera does
not publish details about the register map. For more information, the altera_avalon_lcd_16207_regs.h file
describes the register map, and the Dot Matrix Character LCD Module User's Manual from Optrex
describes the register usage.
Interrupt Behavior
The LCD controller does not generate interrupts. However, the LCD driver's text scrolling feature relies
on the HAL system clock driver, which uses interrupts for timing purposes.
UG-01085
2014.24.07
Software Files 11-3
Optrex 16207 LCD Controller Core Altera Corporation
Send Feedback