LCD
Contents
[hide]LCD
LCD_Init
{{#Widget:LibTable}}Defination | void LCD_Init ( uint8_t var_lcdMode_u8, uint8_t var_lcdNoOfLines_u8, uint8_t var_MaxCharsPerLine_u8) |
Input Arguments |
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Return Value | none |
Description | This function is used to initialize the lcd. It initializes the LCD for selected mode(4/8-bit) and Type(16x2/16x1 etc) |
Usage | LCD_Init(8,2,16) //Initialize 2x16 LCD in 8-bit Mode LCD_Init(4,2,16) //Initialize 2x16 LCD in 4-bit Mode LCD_Init(4,4,16) //Initialize 4x16 LCD in 8-bit Mode |
LCD_CmdWrite
{{#Widget:LibTable}}Defination | void LCD_CmdWrite( uint8_t var_lcdCmd_u8) |
Input Arguments | 8-bit command supported by LCD. |
Return Value | none |
Description | This function sends a command to LCD. Some of the commonly used commands are defined in lcd.h. For more commands refer the data sheet. The behaviour is undefined if unsupported commands are sent. |
Usage |
LCD_CmdWrite(0x0c); //Sets display On and Cursor Off |
LCD_Clear
{{#Widget:LibTable}}Defination | void LCD_Clear() |
Input Arguments | none. |
Return Value | none. |
Description | This function clears the LCD and moves the cursor to beginning of first line |
Usage |
LCD_Clear(); // Clears the lcd and sets the cursor to beginning of the first line. |
LCD_GoToLine
{{#Widget:LibTable}}Defination | void LCD_GoToLine(uint8_t var_lineNumber_u8) |
Input Arguments | uint8_t: Line number to move the cursor. |
Return Value | none |
Description | This function moves the Cursor to beginning of the specified line. If the requested line number is out of range, it will not move the cursor. Note: The line numbers run from 1 to Maxlines.
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Usage |
LCD_GoToLine(1); //Moves the cursor to beginning of first line LCD_GoToLine(E_LcdLineOne); //Recommended usage |
LCD_GoToNextline
{{#Widget:LibTable}}Defination | void LCD_GoToNextLine() |
Input Arguments | none |
Return Value | none |
Description | This function moves the Cursor to beginning of the next line. If the cursor is on last line and NextLine command is issued then it will move the cursor to first line. |
Usage |
LCD_GoToNextline(); //Moves the cursor to beginning of next line. |
LCD_SetCursor
{{#Widget:LibTable}}Defination | void LCD_SetCursor(char var_lineNumber_u8,char var_charNumber_u8) |
Input Arguments |
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Return Value | none |
Description | This function moves the Cursor to specified position.
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Usage |
LCD_SetCursor(1,10); //Moves the cursor to 1st line 11th char. LCD_SetCursor(5,10); //No action taken as line 5 is out of range |
LCD_DisplayChar
{{#Widget:LibTable}}Defination | void LCD_DisplayChar( char var_lcdData_u8) |
Input Arguments | uint8_t: ASCII value of the char to be displayed. |
Return Value | none |
Description | This function sends a character to be displayed on LCD. Any valid ascii value can be passed to display the respective character |
Usage |
LCD_DisplayChar(65); //Displays 'A' on LCD |
LCD_DisplayString
{{#Widget:LibTable}}Defination | void LCD_DisplayString(char *ptr_stringPointer_u8) |
Input Arguments | char*:String(Address of the string) to be displayed. |
Return Value | none |
Description | This function is used to display the ASCII string on the lcd. |
Usage |
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LCD_ScrollMessage
{{#Widget:LibTable}}Defination | void LCD_ScrollMessage(uint8_t var_lineNumber_u8, char *ptr_msgPointer_u8) |
Input Arguments |
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Return Value | none |
Description | This function scrolls the given message on the specified line. If the specified line number is out of range then the message will be scrolled on first line.
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Usage |
LCD_ScrollMessage(" Welcome to embedded programming "); |
LCD_DisplayNumber
{{#Widget:LibTable}}Defination | void LCD_DisplayNumber(NumericSystem_et e_typeOfNum_e8, uint32_t var_number_u32, uint8_t var_numOfDigitsToDisplay_u8) |
Input Arguments |
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Return Value | none |
Description |
This function is used to display a max of 10digit decimal/Hex number OR specified number of bits for binary number.
Decimal:
Hex:
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Usage |
uint32_t decNumber = 123456; |
LCD_Printf
{{#Widget:LibTable}}Defination | void LCD_Printf(const char *argList, ...) |
Input Arguments | variable length arguments similar to printf |
Return Value | none |
Description | This function is similar to printf function in C. It takes the arguments with specified format and displays accordingly .
The supported format specifiers are as below.
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Usage |
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Usage Guide
#include<lpc17xx.h> | |
#include "lcd.h" //User defined LCD library which contains the lcd routines | |
#include "delay.h" //User defined library which contains the delay routines | |
void main() | |
{ | |
SystemInit(); //Clock and PLL configuration | |
/* Setup/Map the controller pins for LCD operation | |
RS RW EN D0 D1 D2 D3 D4 D5 D6 D7 */ | |
LCD_SetUp(P2_0,P2_1,P2_2,P1_20,P1_21,P1_22,P1_23,P1_24,P1_25,P1_26,P1_27); | |
/* Specify the LCD type(2x16, 4x16 etc) for initialization*/ | |
LCD_Init(2,16); | |
while(1) | |
{ | |
/*scroll the message on line1 */ | |
LCD_Clear(); | |
LCD_ScrollMessage(1," Program to demonstrate the ExploreEmbedded Lib Usage"); | |
LCD_Clear(); | |
LCD_Printf("Hello, World \nGood Morning"); | |
DELAY_sec(3); | |
LCD_Clear(); | |
LCD_Printf("DecNum:%4d",1234); | |
LCD_Printf("\nHexNum:%4x",0xABCD); | |
DELAY_sec(3); | |
LCD_Clear(); | |
LCD_Printf("16-bit Bin:1234"); | |
LCD_GoToNextLine(); | |
LCD_Printf("%16b",0x1234); | |
DELAY_sec(3); | |
} | |
} |
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Delay
DELAY This library provides the functions to generate the required delays. Basically it does the looping for the specified count to generate the delay. If the compiler provides the inbuilt...
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ADC
ADC This library provides the functions for initializing the adc and to get the raw adc values. In case of AVR/PIC/ARM or other high end controllers the inbuilt adc is used. In case of 8051/8052...