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https://github.com/digistump/DigistumpArduino.git
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81 lines
2.0 KiB
C++
81 lines
2.0 KiB
C++
/* USB LCD */
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//#define DEBUG
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#include <TinyWireM.h> // I2C Master lib for ATTinys which use USI - comment this out to use with standard arduinos
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#include <LiquidCrystal_I2C.h> // for LCD w/ GPIO MODIFIED for the ATtiny85
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#include <DigiUSB.h>
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#define GPIO_ADDR 0x27 // (PCA8574A A0-A2 @5V) typ. A0-A3 Gnd 0x20 / 0x38 for A - 0x27 is the address of the Digispark LCD modules.
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int currentLine = 0;
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boolean clearOnNext = 0;
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boolean backlight = 1;
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LiquidCrystal_I2C lcd(GPIO_ADDR,16,2); // set address & 16 chars / 2 lines
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void setup(){
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DigiUSB.begin();
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TinyWireM.begin(); // initialize I2C lib - comment this out to use with standard arduinos
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lcd.init(); // initialize the lcd
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lcd.backlight(); // Print a message to the LCD.
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lcd.setCursor(0, currentLine);
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}
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void get_input() {
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int lastRead;
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// when there are no characters to read, or the character isn't a newline
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while (1==1) {
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if(DigiUSB.available()){
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//something to read
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lastRead = DigiUSB.read();
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if(lastRead == '\n'){
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if(currentLine > 0)
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currentLine = 0;
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else
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currentLine = 1;
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clearOnNext = 1;
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lcd.setCursor(0, currentLine);
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}
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else if(lastRead == 172){ //not sign "¬" send it with the send program to toggle the backlight
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if(backlight){
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lcd.noBacklight();
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backlight = 0;
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}
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else{
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lcd.backlight();
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backlight = 1;
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}
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DigiUSB.read(); //read to nothing to get rid of newline that should come after it
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}
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else{
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if(clearOnNext){
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lcd.print(" "); //clear a single line
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lcd.setCursor(0, currentLine);
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clearOnNext=0;
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}
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lcd.print(char(lastRead));
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}
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}
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// refresh the usb port
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DigiUSB.refresh();
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delay(10);
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}
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}
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void loop(){
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get_input();
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} |