LCD Keypad Shield LCD 1602 Character LCD input and output expansion board for arduino raspberry pi uno mega 2560
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I / O expansion board LCDKeypad Shield
LCD Keypad shields input/output extended use 2 lines 16 characters LCD panel, with contrast adjustment and backlight, use a simulated input of mouth, completing five buttons, a reset button, the unused IO mouth extend out spare, make full use of I/o port. Take up the digital port: PIN4 (db3), 5 (DB5), 6 (DB6), 7 (DB7), 8 (RS), 9 (E), 10 (backlight control), A0 simulate keystrokes port. (LCD color is not specified, random delivery.)
Used with Roboduino:
Module debugging:
Will LCD Keypad shields inserted to the controller, then need to download the LCD4Bit_mod. H (right click save as) library files to the - 0015 \ \ hardware \ \ in the libraries, and then compile the following a test program to download to the , first use the LCD Keypad shields, did observe LCD display character first, if there is no contrast shows characters that may be incorrect, you can use a word screwdriver adjustment RP1 (clockwise), characters can be transferred to appear clearly.
The test renderings:
GP2D12Ranging 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);
if(GP2D12>80||GP2D12<10)
{
lcd.cursorTo(2,0);
lcd.printIn(str2);
}
else
{
a=0x30+GP2D12/10;
b=0x30+GP2D12%10;
lcd.cursorTo(2, 3);
lcd.printIn(str1);
lcd.print(a);
lcd.print(b);
lcd.printIn(str3);
}
delay(50);
}
float read_gp2d12_range(byte pin)
{
int tmp;
tmp = analogRead(pin);
if (tmp < 3)return -1;
return (6787.0 /((float)tmp - 3.0)) - 4.0;
}
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