Author | Richard Zengerink, Copyright © 2008..2011, all rights reserved. |
Adapted-by | Joep Suijs, Rob Hamerling |
Compiler | 2.4n |
Common API for HD44780 based LCD
No dependency found
const LCD_DISPLAY_SHIFT_LEFT = 0b_0001_1000
var volatile byte lcd_pos = 0
const LCD_DISPLAY_SHIFT_RIGHT = 0b_0001_1100
const LCD_RETURN_HOME = 0b_0000_0010
const LCD_CURSOR_SHIFT_R_VAL = 0b_0001_0100
const LCD_SET_DDRAM_ADDRESS = 0b_1000_0000
const LCD_SET_CGRAM_ADDRESS = 0b_0100_0000
const LCD_CLEAR_DISPLAY = 0b_0000_0001
const LCD_DISPLAY_ONOFF = 0b_0000_1000
const LCD_CURSOR_SHIFT_L_VAL = 0b_0001_0000
lcd_clear_screen()
lcd_clear_line(byte in line)
lcd_writechar(byte in data)
lcd_shift_right(byte in nr)
lcd_define(byte in pos, byte in str[])
lcd_cursor_blink_display(bit in cursor, bit in blink, bit in display)
lcd_cursor_shift_right(byte in nr)
lcd_shift_left(byte in nr)
lcd_clearscreen()
lcd_home()
lcd_write_char(byte in data)
lcd_cursor_position(byte in line, byte in pos)
lcd'put(byte in data)
lcd_cursor_shift_left(byte in nr)
lcd_progress(byte in line, byte in amount, byte in pattern)
const LCD_DISPLAY_SHIFT_LEFT = 0b_0001_1000
No documentation found
var volatile byte lcd_pos = 0
No documentation found
const LCD_DISPLAY_SHIFT_RIGHT = 0b_0001_1100
No documentation found
const LCD_RETURN_HOME = 0b_0000_0010
No documentation found
const LCD_CURSOR_SHIFT_R_VAL = 0b_0001_0100
No documentation found
const LCD_SET_DDRAM_ADDRESS = 0b_1000_0000
No documentation found
const LCD_SET_CGRAM_ADDRESS = 0b_0100_0000
No documentation found
const LCD_CLEAR_DISPLAY = 0b_0000_0001
constants to control the lcd
const LCD_DISPLAY_ONOFF = 0b_0000_1000
No documentation found
const LCD_CURSOR_SHIFT_L_VAL = 0b_0001_0000
No documentation found
lcd_clear_screen()
lcd_clear_screen - clears the LCD
lcd_clear_line(byte in line)
lcd_clear_line - clears the line "line" of the LCD
lcd_writechar(byte in data)
Deprecated
lcd_shift_right(byte in nr)
lcd_shift_right - shifts the complete display one position to the right
lcd_define(byte in pos, byte in str[])
lcd_define - Create a custom character The characters can be placed on position 0-7 of the character ram . pos: position of the character str[]: array containing the custom character . (0xFF is a common pattern)
lcd_cursor_blink_display(bit in cursor, bit in blink, bit in display)
lcd_cursor_blink_display - (re)sets cursor blink and puts display on/off . params: cursor: enable or disable the fixed underline cursor blink: enable or disable blinking of the block-cursor (so block blinking or off) display: enable or disable the whole display
lcd_cursor_shift_right(byte in nr)
lcd_cursor_shift_right - shifts cursor one position to the right
lcd_shift_left(byte in nr)
lcd_shift_left - shifts the complete display one position to the left
lcd_clearscreen()
Deprecated
lcd_home()
lcd_home - cursor returns home(line 0, position 0)
lcd_write_char(byte in data)
lcd_write_char - write one char to LCD
lcd_cursor_position(byte in line, byte in pos)
lcd_cursor_position - Specify row and column (0-based) . About cursor positions: the LCDs are internally 2x40 char devices. The first line starts at offset 0, the second line at offset 64 (0x40). With 4 line devices the third and fourth line are addressed as extensions of the first and second line by adding an offset. For a 4x20 line device the offset is 20, for a 4x16 line display the offset is 16 or 20. Declare the constant LCD_CHARS as appropriate for your screen (you may have to specify 20 even if your display has only 16 chars!). . Note: Some 1x16 LCDs are implemented as 2x8 line LCDs, which means that the second half of the line has to be handled as the second line.
lcd'put(byte in data)
lcd'put - write one char to screen (pseudo var, enables streams)
lcd_cursor_shift_left(byte in nr)
lcd_cursor_shift_left - shifts cursor one position to the left
lcd_progress(byte in line, byte in amount, byte in pattern)
lcd_progress- Displays a progress bar The progress bar starts at position 0 of a line. line: line on which progress bar is displayed amount: number of bar chars that are displayed (0xFF is a common pattern)
_lcd_restore_cursor()
_lcd_restore_cursor - sets the cursor to the position in the shadow register (this routine is only used inside this file)
_lcd_line2index(byte in line) return byte
_lcd_line2index - internal function - calculate index from line number