Thursday, July 28, 2016
Arduino Mega read string from Serial display on 3 2 480 x 320 TFT LCD Shield
Arduino Mega read string from Serial display on 3 2 480 x 320 TFT LCD Shield
Arduino example run on Mega 2560, read string from Serial port, and display on 3.2" 480 x 320 TFT LCD Shield usin UTFT library. The sting is limited to 30 characters on each line.
Mega_UTFT_SerialRead.ino
/*
* Example run on Arduino Mega 2560 to read string from Serial,
* then display on 3.2" 480 x 320 TFT LCD Shield
*
* http://arduino-er.blogspot.com/search/label/3.2%22%20480%20x%20320%20TFT%20LCD%20Shield
*/
#include <UTFT.h>
extern uint8_t BigFont[];
UTFT myGLCD(CTE32HR,38,39,40,41);
const int NumOfRow = 20;
const int HeightOfRow = 16;
const int CharPerRow = 30;
String buffer[NumOfRow];
void setup()
{
Serial.begin(57600);
myGLCD.InitLCD();
myGLCD.clrScr();
myGLCD.setColor(255, 255, 255);
myGLCD.setBackColor(0, 0, 0);
myGLCD.setFont(BigFont);
myGLCD.print("Open Serial Monitor,", LEFT, 0);
myGLCD.print("to enter something.", LEFT, HeightOfRow);
initBuffer();
}
void loop()
{
String stringIn = Serial.readStringUntil( );
Serial.print(".");
if(!stringIn.equals("")){
Serial.print("*");
String stringToIns = stringIn.substring(0, CharPerRow);
insert(stringToIns);
Serial.println(stringToIns);
printBuffer();
}
}
void initBuffer(){
for(int i=0; i<NumOfRow; i++){
buffer[i] = "";
}
}
void insert(String ins){
for(int i=0; i<NumOfRow-1; i++){
buffer[i] = buffer[i+1];
}
buffer[NumOfRow-1] = ins;
}
void printBuffer(){
myGLCD.clrScr();
for(int i=0; i<NumOfRow; i++){
myGLCD.print(buffer[i], LEFT, i*HeightOfRow);
}
}
