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Selasa, 09 Oktober 2012

Displaying a Word or String in an 16x2 LCD with PIC16F877A and MPLAB X

Displaying a Word or String in an 16x2 LCD with PIC16F877A and MPLAB X - welcome to the blog Software Gadget the end of this much calm product information launcing, yes every day there are always products that are removed from various brands, both physical hardware products and software that need new knowledge to use it, well now we will discuss first about Displaying a Word or String in an 16x2 LCD with PIC16F877A and MPLAB X as you search we have collected a lot of data to make this information as complete as possible for you, please read:

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Displaying a Word or String in an 16x2 LCD with PIC16F877A and MPLAB X

We have seen how to interface an LCD with PIC16F877A  . In this we are printing only a letter in the  LCD , now we are going to Display a string on the LCD  for this following steps are followed


First Create a MPLAB X project as in the steps for  Blinking a LED using MPLAB X , PIC16F877A

And check the  Interfacing LCD with PIC16F877A in MPLAB X  to know how to interface a LCD

Components
1.PIC16F877A micro controller
2. 2x16 LCD Display



we are using the following functions 



  • void delay(unsigned int msec) // Time delay function

  • void lcd_cmd(unsigned char item) // Function to send command to LCD

  • void lcd_data(unsigned char item) // Function to send data to LCD

  • void lcd_data_string(unsigned char *str) // Function to send data to string

  • void lcd(unsigned char str[10])




To display the string in  LCD , just call the below lines in main function


 lcd_cmd(0x01);
  lcd_cmd(0x86);
  lcd("STRING TO DISPLAY");


The functions are defined below 




void delay(unsigned int msec) // Time delay function
{
int i,j ;
for(i=0;i<msec;i++)
for(j=0;j<1275;j++);
}
void lcd_cmd(unsigned char item) // Function to send command to LCD
{
dataport = item;
rs= 0;
rw=0;
en=1;
delay(1);
en=0;
return;
}
void lcd_data(unsigned char item) // Function to send data to LCD
{
dataport = item;
rs= 1;
rw=0;
en=1;
delay(1);
en=0;
return;
}
void lcd_data_string(unsigned char *str) // Function to send data to string
{
int i=0;
while(str[i]!='\0')
{
lcd_data(str[i]);
i++;
//delay(10);
}
return;
}
void lcd(unsigned char str[10])
{
lcd_cmd(0x38);
lcd_cmd(0x0e);
lcd_data_string(str);
}



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