LCD1602 character LCD blue screen input output expansion board LCD

LCD input output expansion board uses 2 lines and 16 characters LCD, which has a contrast adjustment and backlight. Use 1 analog port to complete the input of 5 keys, 1 reset button, and the unused IO ports are expanded to set aside, and make full use of it.IO port.Occupy digital port: PIN4 (DB4), 5 (DB5), 6 (DB6), 7 (DB7), 8 (RS), 9 (E), 10 (backlight control), simulation key port A0EssenceUse it with Arduino:

 

Point definition:

 

Debugging of the module:

       insert LCD keypad shield to the Arduino controller, and then downloadLCD4Bit_mod.h(Right-click another) library file to -0015 \ Hardware \ libraries, then compile a test program below and download it to Arduino. The LCD is for the first time.Correctly, you can use a word to adjust the RP1 (rotating clockwise), and you can adjust it to a clear character.

 

Professional anti -static packaging

Test renderings:

 

 

GP2D12 ranging code:

#include

LCD4Bit_mod lcd = LCD4Bit_mod(2);

char GP2D12;
char a,b;
char str1[]="Renge:";
char str2[]="   Renge Over  ";
char str3[]="cm";

void setup()
{
  lcd.init();
  lcd.clear();
  lcd.printIn("GP2D12 testing..."); 
}

void loop()
{
      GP2D12=read_gp2d12_range(1);
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if(GP2D12>80 GP2D12<10)
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lcd.cursorTo(2,0);&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lcd.printIn(str2);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; else
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; a=0x30+GP2D12/10;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; b=0x30+GP2D12%10;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lcd.cursorTo(2, 3);&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lcd.printIn(str1);&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lcd.print(a);&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lcd.print(b);
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; lcd.printIn(str3);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }&nbsp;&nbsp;&nbsp;&nbsp;
&nbsp;&nbsp;&nbsp; delay(50);
}

float read_gp2d12_range(byte pin)
{
&nbsp;int tmp;
&nbsp;tmp = analogRead(pin);
&nbsp;if (tmp< 3)return -1;&nbsp;
&nbsp; Return (6787.0 /((Float) TMP -3.0)) -4.0;
}