I’m trying to print data from software serial port to 240x128 display. 9 rows prints fine but then something happens and next rows are not printed ok. Is this some kind of memory problem or is the problem in my code. I have verified with debug messages to native serial port that data comes correct to arduino. I cannot use u8g2log because it does not support UTF8.
If i send full 40 character rows it will fail printing but if i send only few characters at row it maybe print all correct.
Thank you in advance
-Janne
Here is my code:
#include <Arduino.h>
#include <U8g2lib.h>
#include <SoftwareSerial.h>
SoftwareSerial mySerial(16, 17); // RX, TX
#ifdef U8X8_HAVE_HW_SPI
#include <SPI.h>
#endif
#ifdef U8X8_HAVE_HW_I2C
#include <Wire.h>
#endif
U8G2_T6963_240X128_1_8080 u8g2(U8G2_R0, 5, 6, 7, 8, 9, 10, 11, 12, /*enable=*/ 4, /*cs=*/ 15, /*dc=*/ 2, /*reset=*/ 14); // Connect RD with +5V, FS0 and FS1 with GND
String inputString = ""; // a string for incoming data
String MinputString = "";
String rivi01 = "";
String rivi02 = "";
String rivi03 = "";
String rivi04 = "";
String rivi05 = "";
String rivi06 = "";
String rivi07 = "";
String rivi08 = "";
String rivi09 = "";
String rivi10 = "";
String rivi11 = "";
String rivi12 = "";
String rivi13 = "";
String rivi14 = "";
String rivi15 = "";
String rivi16 = "";
boolean stringComplete = false; // is string complete
void setup() {
// setup code
// initialize serial:
Serial.begin(9600);
pinMode(3, OUTPUT);
digitalWrite(3, HIGH); // /RD=HIGH
while (!Serial) {
// ; // wait native serial port connection
}
mySerial.begin(19200);
//mySerial.println("Hello, world?");
Serial.println("Hello, world?");
// reserve 40 bytes for the inputString:
inputString.reserve(40);
pinMode(13, OUTPUT);
digitalWrite(13, LOW); //Backlight ON
u8g2.begin();
}
void loop() {
mySerialEvent();
// tulosta kun uusrivi tulee
if (stringComplete) {
Serial.println(inputString);
mySerial.println(inputString);
MinputString=inputString;
// clear the string:
inputString = "";
stringComplete = false;
tulostus();
}
}
// receive string for certain rows
void tulostus() {
if (MinputString.startsWith("#ROW01")) {
rivi01=MinputString;
rivi01.remove(0, 6);
MinputString="";
}
if (MinputString.startsWith("#ROW02")) {
rivi02=MinputString;
rivi02.remove(0, 6);
MinputString="";
}
if (MinputString.startsWith("#ROW03")) {
rivi03=MinputString;
rivi03.remove(0, 6);
MinputString="";
}
if (MinputString.startsWith("#ROW04")) {
rivi04=MinputString;
rivi04.remove(0, 6);
MinputString="";
}
if (MinputString.startsWith("#ROW05")) {
rivi05=MinputString;
rivi05.remove(0, 6);
MinputString="";
}
if (MinputString.startsWith("#ROW06")) {
rivi06=MinputString;
rivi06.remove(0, 6);
MinputString="";
}
if (MinputString.startsWith("#ROW07")) {
rivi07=MinputString;
rivi07.remove(0, 6);
//mySerial.println("RIVI 7");
//mySerial.println(rivi07);
MinputString="";
}
if (MinputString.startsWith("#ROW08")) {
rivi08=MinputString;
rivi08.remove(0, 6);
MinputString="";
}
if (MinputString.startsWith("#ROW09")) {
rivi09=MinputString;
rivi09.remove(0, 6);
MinputString="";
}
if (MinputString.startsWith("#ROW10")) {
rivi10=MinputString;
rivi10.remove(0, 6);
MinputString="";
}
if (MinputString.startsWith("#ROW11")) {
rivi11=MinputString;
rivi11.remove(0, 6);
MinputString="";
}
if (MinputString.startsWith("#ROW12")) {
rivi12=MinputString;
rivi12.remove(0, 6);
MinputString="";
}
if (MinputString.startsWith("#ROW13")) {
rivi13=MinputString;
rivi13.remove(0, 6);
MinputString="";
}
if (MinputString.startsWith("#ROW14")) {
rivi14=MinputString;
rivi14.remove(0, 6);
MinputString="";
}
if (MinputString.startsWith("#OUT")) {
Serial.println("tulostus");
TULOSTUSLCD();
}
if (MinputString.startsWith("#L_ON")) {
digitalWrite(13, LOW); //Valo Päälle Backlight ON
}
if (MinputString.startsWith("#L_OFF")) {
digitalWrite(13, HIGH); // Valo Pois päältä Backlight OFF
}
}
void TULOSTUSLCD(){
u8g2.firstPage();
do {
u8g2.setFont(u8g2_font_6x12_t_symbols);
u8g2.enableUTF8Print(); // enable skandinavian fonts
u8g2.drawUTF8(0, 9, rivi01.c_str());
u8g2.drawUTF8(0, 18, rivi02.c_str());
u8g2.drawUTF8(0, 27, rivi03.c_str());
u8g2.drawUTF8(0, 36, rivi04.c_str());
u8g2.drawUTF8(0, 45, rivi05.c_str());
u8g2.drawUTF8(0, 54, rivi06.c_str());
u8g2.drawUTF8(0, 63, rivi07.c_str());
u8g2.drawUTF8(0, 72, rivi08.c_str());
u8g2.drawUTF8(0, 81, rivi09.c_str());
u8g2.drawUTF8(0, 90, rivi10.c_str());
u8g2.drawUTF8(0, 99, rivi11.c_str());
u8g2.drawUTF8(0, 108, rivi12.c_str());
u8g2.drawUTF8(0, 117, rivi13.c_str());
u8g2.drawUTF8(0, 126, rivi14.c_str());
// delay(1000);
} while ( u8g2.nextPage() );
//delay(1000);
}
void mySerialEvent() {
while (mySerial.available()) {
// ota vastaan uusi merkki
char inChar = (char)mySerial.read();
// lisää se tekstijonoon
inputString += inChar;
// jos uusrivi otetaan vastaan merkki päälle
if (inChar == '\n') {
stringComplete = true;
}
}
}