Oliver Broad / Mbed 2 deprecated LCD_nonblocking_demo

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Dependencies:   mbed

Fork of LCD_nonblocking_demo by Oliver Broad

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TextLCD Class Reference
Public Types | Public Member Functions | Data Fields

TextLCD Class Reference

A TextLCD interface for driving 4-bit HD44780-based LCDs. More...

#include <LCD_nonblocking.h>

Public Types

enum  LCDType { LCD16x2, LCD16x2B, LCD20x2, LCD20x4 }
 

LCD panel format.

More...

Public Member Functions

 TextLCD (PinName rs, PinName e, PinName d4, PinName d5, PinName d6, PinName d7, LCDType type=LCD16x2)
 Create a TextLCD interface.
int putc (int c)
 Write a character to the LCD.
volatile int printf (const char *format,...)
 Write a formated string to the LCD.
void locate (int column, int row)
 Locate to a screen column and row.
void cls ()
 Clear the screen and locate to 0,0.

Data Fields

volatile int busy
 Status of display, wait for zero before writing.

Detailed Description

A TextLCD interface for driving 4-bit HD44780-based LCDs.

Currently supports 16x2, 20x2 and 20x4 panels

Implements a "Busy" flag to indicate when display is unavailable Busy is currently set by a timer and not by polling actual module

 #include "mbed.h"
 #include "TextLCD.h"

 TextLCD lcd(p10, p12, p15, p16, p29, p30); // rs, e, d4-d7

 int main() {
     lcd.printf("Hello World!\n");
 }

Definition at line 48 of file LCD_nonblocking.h.

Member Enumeration Documentation

enum LCDType

LCD panel format.

Enumerator:
LCD16x2 

16x2 LCD panel (default)

LCD16x2B 

16x2 LCD panel alternate addressing

LCD20x2 

20x2 LCD panel

LCD20x4 

20x4 LCD panel

Definition at line 53 of file LCD_nonblocking.h.

Constructor & Destructor Documentation

TextLCD ( PinName  rs,
PinName  e,
PinName  d4,
PinName  d5,
PinName  d6,
PinName  d7,
LCDType  type = LCD16x2 
)

Create a TextLCD interface.

Parameters:
rsInstruction/data control line
eEnable line (clock)
d4-d7Data lines for using as a 4-bit interface
typeSets the panel size/addressing mode (default = LCD16x2)

Definition at line 30 of file LCD_nonblocking.cpp.

Member Function Documentation

void cls (  )

Clear the screen and locate to 0,0.

Definition at line 111 of file LCD_nonblocking.cpp.

void locate ( int  column,
int  row 
)

Locate to a screen column and row.

Parameters:
columnThe horizontal position from the left, indexed from 0
rowThe vertical position from the top, indexed from 0

Definition at line 120 of file LCD_nonblocking.cpp.

volatile int printf ( const char *  format,
  ... 
)

Write a formated string to the LCD.

Parameters:
formatA printf-style format string, followed by the variables to use in formating the string.
int putc ( int  c )

Write a character to the LCD.

Parameters:
cThe character to write to the display

Field Documentation

volatile int busy

Status of display, wait for zero before writing.

Definition at line 100 of file LCD_nonblocking.h.

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