How to make that only the values ​​change when using the TFT screen, not the entire screen

[ucay99]

I have the following code

`#include <FastIMU.h>
#include <Wire.h>
#include <math.h>
#include <TFT_eSPI.h> // Hardware-specific library
#include <SPI.h>
#include "NotoSansBold15.h"
#include "NotoSansBold36.h"

// The font names are arrays references, thus must NOT be in quotes ""
#define AA_FONT_SMALL NotoSansBold15
#define AA_FONT_LARGE NotoSansBold36

#define IMU_ADDRESS 0x68 //Change to the address of the IMU
#define PERFORM_CALIBRATION //Comment to disable startup calibration
MPU6500 IMU; //Change to the name of any supported IMU!

calData calib = { 0 }; //Calibration data
AccelData accelData; //Sensor data
GyroData gyroData;
MagData magData;
TFT_eSPI tft = TFT_eSPI(); // Invoke custom library
TFT_eSprite spr = TFT_eSprite(&tft); // Sprite class needs to be invoked

void setup() {
tft.begin();
tft.setRotation(3);
tft.loadFont(AA_FONT_LARGE); // Load another different font

Wire.begin();
Serial.begin(115200);
while (!Serial) {
;
}

int err = IMU.init(calib, IMU_ADDRESS);
if (err != 0) {
Serial.print("Error initializing IMU: ");
Serial.println(err);
while (true) {
;
}
}

#ifdef PERFORM_CALIBRATION
Serial.println("FastIMU calibration & data example");
if (IMU.hasMagnetometer()) {
delay(1000);
Serial.println("Move IMU in figure 8 pattern until done.");
delay(3000);
IMU.calibrateMag(&calib);
Serial.println("Magnetic calibration done!");
}
else {
delay(100);
}

delay(2000);
Serial.println("Tolong jangan gerak-gerak.. IMU sedang dikalibrasi");
delay(2000);
IMU.calibrateAccelGyro(&calib);
IMU.init(calib, IMU_ADDRESS);
Serial.println("Kalibrasi Selesai!");
delay(3000);
#endif

if (err != 0) {
Serial.print("Error Setting range: ");
Serial.println(err);
while (true) {
;
}
}
}

void loop() {
IMU.update();
// Dapatkan data akselerometer dan giroskop
IMU.getAccel(&accelData);
IMU.getGyro(&gyroData);
delay(50);
// Hitung sudut kemiringan menggunakan arctan

float pitch = fabs(atan2(accelData.accelY, accelData.accelZ)- PI)* 180.0 / PI;
float roll = fabs(atan2(accelData.accelX, accelData.accelZ)- PI)* 180.0 / PI;

tft.fillScreen(TFT_BLACK);
tft.setTextColor(TFT_WHITE, TFT_BLACK); // Set the font colour AND the background colour

// Tampilkan data sudut kemiringan
Serial.print("Sudut X: ");
Serial.print(pitch);
Serial.print("\t Sudut Y: ");
Serial.println(roll);
tft.setTextColor(TFT_WHITE, TFT_BLACK, false);
tft.setCursor(50, 100);
tft.print(pitch, 1);
tft.setCursor(200, 100);
tft.print(roll, 1);
delay(500);
}`
How do I prevent the TFT screen from flashing when the value of the sensor changes

[zalexzperez]

I think what you need are Sprites. There are examples using them for quickly changing values.