LCD TFT : Membuat Digital Oscilloscope dengan Arduino Uno dan LCD TFT 2.4" Shield

Membuat DIY Digital Oscilloscope dengan Arduino Uno dan LCD TFT 2,4" Shield

Bahan yang dibutuhkan dalam Project ini :
1 unit Arduino Uno R3 (Ori / Clone gak ada masalah)
1 unit LCD TFT 2,4" 320x240pixel Adafruit / mcufriend
1 pc Kabel probe/jumper/kabel duppon

Wiring
-Pasang LCD TFT Shield diatas pin header Arduino Uno
-Pasang Probe/kabel jumper pad pin A5 dan GND sebagai Probe Oscilloscope

Data Pendukung

Library LCD TFT 2.4" SPFD5408 Rev by dani download disini
Sketch Coding Arduino Oscilloscope 2,4" Rev by dani download disini
Berikut Video Penampakan Arduino Oscilloscope nya :
Yang gagal download Codingnya silahkan Copy Paste Coding di bawah ini ke dalam Arduino IDE :
#include <SPFD5408_Adafruit_TFTLCD.h>

#define LCD_CS A3
#define LCD_CD A2
#define LCD_WR A1
#define LCD_RD A0
#define LCD_RESET A4

Adafruit_TFTLCD tft(LCD_CS, LCD_CD, LCD_WR, LCD_RD, LCD_RESET);

#define txtLINE0   0
#define txtLINE1   16
#define txtLINE2   30
#define txtLINE3   46

const int LCD_WIDTH = 320;  //Panjang/Lebar LCD dalam pixel
const int LCD_HEIGHT = 240; //Tinggi LCD dalam pixel
const int SAMPLES = 270; 
const int DOTS_DIV = 30;

const int ad_sw = 10;                   // Analog 3 pin for switches
const int ad_ch0 = 6;                   // Analog 6 pin for channel 0
const int ad_ch1 = 5;                   // Analog 5 pin for channel 1
const unsigned long VREF[] = {150, 300, 750, 1500, 3000}; // reference voltage 5.0V ->  150 :   1V/div range (100mV/dot)
                                        // It means 5.0 * DOTS_DIV = 150. Use 4.9 if reference voltage is 4.9[V]
                                        //                        -> 300 : 0.5V/div
                                        //                        -> 750 : 0.2V/div
                                        //                        ->1500 : 100mV/div
                                        //                       -> 3000 :  50mV/div
const int MILLIVOL_per_dot[] = {33, 17, 6, 3, 2}; // mV/dot
const int MODE_ON = 0;
const int MODE_INV = 1;
const int MODE_OFF = 2;
const char *Modes[] = {"NORMAL", "INVERT", "OFF"};
const int TRIG_AUTO = 0;
const int TRIG_NORM = 1;
const int TRIG_SCAN = 2;
const int TRIG_ONE  = 3;
const char *TRIG_Modes[] = {"Auto", "Norm", "Scan", "One"};
const int TRIG_E_UP = 0;
const int TRIG_E_DN = 1;
#define RATE_MIN 0
#define RATE_MAX 13
const char *Rates[] = {"F1-1", "F1-2 ", "F2  ", "5ms", "10ms", "20ms", "50ms", "0.1s", "0.2s", "0.5s", "1s", "2s", "5s", "10s"};
#define RANGE_MIN 0
#define RANGE_MAX 4
const char *Ranges[] = {" 1V ", "0.5V", "0.2V", "0.1V", "50mV"};
unsigned long startMillis;
byte data[4][SAMPLES];                   // keep twice of the number of channels to make it a double buffer
byte sample=0;                           // index for double buffer

///////////////////////////////////////////////////////////////////////////////////////////////
// Define colors here

//color address harus diberikan saat menggunakan lib SPFD5408_Adafruit_TFTLCD.h
#define BLACK   0x0000
#define BLUE    0x001F
#define RED     0xF800
#define GREEN   0x07E0
#define CYAN    0x07FF
#define MAGENTA 0xF81F
#define YELLOW  0xFFE0
#define WHITE   0xFFFF

#define BGCOLOR   BLACK    //Warna Background
#define GRIDCOLOR GREEN    //Warna Grid
#define CH1COLOR  RED      //Warna Gelombang Channel 1
#define CH2COLOR  MAGENTA  //Warna Gelombang Channel 2

// Declare variables and set defaults here
// Note: only ch1 is available with Aitendo's parallel 320x240 TFT LCD  
byte range0 = RANGE_MIN, ch0_mode = MODE_OFF;  // CH0
short ch0_off = 204;
byte range1 = RANGE_MIN, ch1_mode = MODE_ON;  // CH1
short ch1_off = 204;
byte rate = 3;                                // sampling rate
byte trig_mode = TRIG_AUTO, trig_lv = 30, trig_edge = TRIG_E_UP, trig_ch = 1; // trigger settings
byte Start = 1;  // Start sampling
byte menu = 0;  // Default menu
///////////////////////////////////////////////////////////////////////////////////////////////

void setup(){

  tft.reset();  //perlu saat menggunakan lib.SPFD5408_Adafruit_TFTLCD.h
  //tft.initDisplay(); //tidak perlu saat menggunakan lib.SPFD5408_Adafruit_TFTLCD.h
  tft.begin(0x9341); //perlu address ini saat menggunakan lib.SPFD5408_Adafruit_TFTLCD.h
  tft.setRotation(3);

  tft.fillScreen(BGCOLOR);

  tft.setTextColor(WHITE);
  tft.setTextSize(1);
  tft.setCursor(75, 100);
  tft.print("Arduino Uno Oscilloscope");
  tft.setCursor(75, 120);
  tft.print("with SPFD5408 TFT LCD (320x240)");
  tft.setCursor(75, 140);
  tft.print("(c)RJDuino 2016-2021");
  delay(2000);

  tft.fillScreen(BGCOLOR);
   
  Serial.begin(9600);
  DrawGrid();
  DrawText();
}

void CheckSW() {
  static unsigned short oain[2];
  static unsigned long Millis = 0, oMillis = 0;
  unsigned long ms;
  unsigned short ain = analogRead(ad_sw);
  
  return;
  
  ms = millis();
  if ((ms - Millis)<5)
    return;
  Millis = ms;
  
  if (!(abs(oain[0] - oain[1])>10 && abs(oain[1] - ain)<2)) {
    oain[0] = oain[1];
    oain[1] = ain;
    return;
  }
  oain[0] = oain[1];
  oain[1] = ain;
  
  if (ain > 950 || (Millis - oMillis)<200)
    return;
  oMillis = Millis;

  // Serial.println(ain);
  
  int sw;
  for (sw = 0; sw < 10; sw ++) {
    const int sw_lv[] = {889, 800, 700, 611, 514, 419, 338, 231, 132, 70};
    if (ain > sw_lv[sw])
      break;
  }
  // Serial.println(sw);
  
  switch (menu) {
  case 0:
  default:
    menu0_sw(sw); 
    break;
  case 1:
    menu1_sw(sw); 
    break;
  case 2:
    menu2_sw(sw); 
    break;
  }
  
  DrawText();
}

void menu0_sw(int sw) {  
  switch (sw) {
   case 0:
    // START/HOLD
    if (Start)
       Start = 0;
     else
       Start = 1;
    break;
   case 1:
    // CH0 RANGE -
    if (range0 < RANGE_MAX)
      range0 ++;
    break;
   case 2:
    // CH1 RANGE -
    if (range1 < RANGE_MAX)
      range1 ++;
    break;
   case 3:
    // RATE FAST
    if (rate > 0)
      rate --;
    break;
   case 4:
    // TRIG MODE
    if (trig_mode < TRIG_ONE)
      trig_mode ++;
    else
      trig_mode = 0;
    break;
   case 5:
    // SEND
    SendData();
    break;
   case 6:
    // TRIG MODE
    if (trig_mode > 0)
      trig_mode --;
    else
      trig_mode = TRIG_ONE;
    break;
   case 7:
    // RATE SLOW
    if (rate < RATE_MAX)
      rate ++;
    break;
   case 8:
    // CH1 RANGE +
    if (range1 > 0)
      range1 --;
    break;
   case 9:
    // CH0 RANGE +
    if (range0 > 0)
      range0 --;
    break;
   case 10:
   default:
    // MENU SW
    menu ++;
     break;
  }
}

void menu1_sw(int sw) {  
  switch (sw) {
   case 0:
    // START/HOLD
    if (Start)
       Start = 0;
     else
       Start = 1;
    break;
   case 1:
    // CH0 offset +
    if (ch0_off < 1023)
      ch0_off += 1024/VREF[range0];
    break;
   case 2:
    // CH1 offset +
    if (ch1_off < 1023)
      ch1_off += 1024/VREF[range1];
    break;
   case 3:
    // trigger level +
    if (trig_lv < 60)
      trig_lv ++;
    break;
   case 4:
   case 6:
    // TRIG EDGE
    if (trig_edge == TRIG_E_UP)
      trig_edge = TRIG_E_DN;
    else
      trig_edge = TRIG_E_UP;
    break;
   case 5:
    // SEND
    SendData();
    break;
   case 7:
    // trigger level -
    if (trig_lv > 0)
      trig_lv --;
    break;
   case 8:
    // CH1 OFF -
    if (ch1_off > -1023)
      ch1_off -= 1024/VREF[range1];
    break;
   case 9:
    // CH0 OFF -
    if (ch0_off > -1023)
      ch0_off -= 1024/VREF[range0];
    break;
   case 10:
   default:
    // MENU SW
    menu ++;
     break;
  }
}

void menu2_sw(int sw) {  
  switch (sw) {
   case 0:
    // START/HOLD
    if (Start)
       Start = 0;
     else
       Start = 1;
    break;
   case 1:
    if (ch0_mode < 2)
      ch0_mode ++;
    break;
   case 2:
    if (ch1_mode < 2)
      ch1_mode ++;
    break;
   case 3:
   case 7:
    // TRIG channel
    if (trig_ch == 0)
      trig_ch = 1;
    else
      trig_ch = 0;
    break;
   case 5:
    // SEND
    SendData();
    break;
   case 8:
    if (ch1_mode > 0)
      ch1_mode --;
    break;
   case 9:
    if (ch0_mode > 0)
      ch0_mode --;
    break;
   case 10:
    // MENU SW
    menu = 0;
     break;
   case 4:
   case 6:
   default:
    // none
    break;
  }
}

void SendData() {
  Serial.print(Rates[rate]);
  Serial.println("/div (30 samples)");
  for (int i=0; i<SAMPLES; i ++) {
      Serial.print(data[sample + 0][i]*MILLIVOL_per_dot[range0]);
      Serial.print(" ");
      Serial.println(data[sample + 1][i]*MILLIVOL_per_dot[range1]);
   } 
}

void DrawGrid() {
    for (int x=0; x<=SAMPLES; x += 2) { // Horizontal Line
      for (int y=0; y<=LCD_HEIGHT; y += DOTS_DIV) {
        tft.drawPixel(x, y, GRIDCOLOR);
        CheckSW();
      }
      if (LCD_HEIGHT == 240)
        tft.drawPixel(x, LCD_HEIGHT-1, GRIDCOLOR);
    }
    for (int x=0; x<=SAMPLES; x += DOTS_DIV ) { // Vertical Line
      for (int y=0; y<=LCD_HEIGHT; y += 2) {
        tft.drawPixel(x, y, GRIDCOLOR);
        CheckSW();
      }
    }
}

void DrawText() {
  //Status ukur Oscilloscop-> akan ditampilkan pada sebelah kanan layar
  tft.setTextColor(WHITE);
  tft.setTextSize(1);
  tft.setCursor(SAMPLES+13, 5);
  tft.print("MODE");
  tft.setTextColor(CYAN);  
  tft.setCursor(SAMPLES-3, 20);
  tft.print(Ranges[range1]);
  tft.println("/DIV");
  tft.setCursor(SAMPLES+3, 30);
  tft.print(Rates[rate]);
  tft.println("/DIV");
  tft.setTextColor(MAGENTA);
  tft.setCursor(SAMPLES+3, 40);
  tft.println(TRIG_Modes[trig_mode]);
  tft.setTextColor(BLUE);
  tft.setCursor(SAMPLES+3, 50);
  tft.println(trig_edge == TRIG_E_UP ? "UP" : "DN"); 
  tft.setTextColor(RED);
  tft.setCursor(SAMPLES+3, 60);
  tft.println(Modes[ch1_mode]);
  tft.setTextColor(YELLOW);
  tft.setCursor(SAMPLES+3, 70);
  tft.println(trig_ch == 0 ? "T:1" : "T:2");

  //Index skala ukur
  tft.setTextColor(WHITE);
  tft.setTextSize(1);
  tft.setCursor(5, 20);
  tft.println("6.0"); 
  tft.setCursor(5, 50);
  tft.println("5.0"); 
  tft.setCursor(5, 80);
  tft.println("4.0"); 
  tft.setCursor(5, 110);
  tft.println("3.0"); 
  tft.setCursor(5, 140);
  tft.println("2.0"); 
  tft.setCursor(5, 170);
  tft.println("1.0"); 
  tft.setCursor(5, 200);
  tft.println("0"); 
  tft.setCursor(5, 230);
  tft.println("-1"); 
 
#if 0
    GLCD.FillRect(101,txtLINE0,28,64, WHITE);  // clear text area that will be drawn below 
    
    switch (menu) {
      case 0:
        GLCD.GotoXY(SAMPLES + 1,txtLINE0);         // locate curser for printing text
        GLCD.Puts(Ranges[range0]); 
        GLCD.GotoXY(SAMPLES + 1,txtLINE1);         // locate curser for printing text
        GLCD.Puts(Ranges[range1]); 
        GLCD.GotoXY(SAMPLES + 1,txtLINE2);         // locate curser for printing text
        GLCD.Puts(Rates[rate]); 
        GLCD.GotoXY(SAMPLES + 1,txtLINE3);         // locate curser for printing text
        GLCD.Puts(TRIG_Modes[trig_mode]); 
        break;
      case 1:
        GLCD.GotoXY(SAMPLES + 1,txtLINE0);         // locate curser for printing text
        GLCD.Puts("OF1"); 
        GLCD.GotoXY(SAMPLES + 1,txtLINE1);         // locate curser for printing text
        GLCD.Puts("OF2");
        GLCD.GotoXY(SAMPLES + 1,txtLINE2);         // locate curser for printing text
        GLCD.Puts("Tlv"); 
        GLCD.GotoXY(SAMPLES + 1,txtLINE3);         // locate curser for printing text
        GLCD.Puts(trig_edge == TRIG_E_UP ? "UP" : "DN"); 
        break;
      case 2:
        GLCD.GotoXY(SAMPLES + 1,txtLINE0);         // locate curser for printing text
        GLCD.Puts(Modes[ch0_mode]); 
        GLCD.GotoXY(SAMPLES + 1,txtLINE1);         // locate curser for printing text
        GLCD.Puts(Modes[ch1_mode]);
        GLCD.GotoXY(SAMPLES + 1,txtLINE2);         // locate curser for printing text
        GLCD.Puts(trig_ch == 0 ? "T:1" : "T:2"); 
        break;
    }
#endif
}

void DrawGrid(int x) {
    if ((x % 2) == 0)
      for (int y=0; y<=LCD_HEIGHT; y += DOTS_DIV)
        tft.drawPixel(x, y, GRIDCOLOR);
    if ((x % DOTS_DIV) == 0)
      for (int y=0; y<=LCD_HEIGHT; y += 2)
        tft.drawPixel(x, y, GRIDCOLOR);
}

void ClearAndDrawGraph() {
  int clear = 0;
  
  if (sample == 0)
    clear = 2;
#if 0
   for (int x=0; x<SAMPLES; x++) {
     GLCD.SetDot(x, LCD_HEIGHT-data[clear+0][x], WHITE);
     GLCD.SetDot(x, LCD_HEIGHT-data[clear+1][x], WHITE);
     GLCD.SetDot(x, LCD_HEIGHT-data[sample+0][x], BLACK);
     GLCD.SetDot(x, LCD_HEIGHT-data[sample+1][x], BLACK);
  }
#else
   for (int x=0; x<(SAMPLES-1); x++) {
     tft.drawLine(x, LCD_HEIGHT-data[clear+0][x], x+1, LCD_HEIGHT-data[clear+0][x+1], BGCOLOR);
     tft.drawLine(x, LCD_HEIGHT-data[clear+1][x], x+1, LCD_HEIGHT-data[clear+1][x+1], BGCOLOR);
     if (ch0_mode != MODE_OFF)
       tft.drawLine(x, LCD_HEIGHT-data[sample+0][x], x+1, LCD_HEIGHT-data[sample+0][x+1], CH1COLOR);
     if (ch1_mode != MODE_OFF)
       tft.drawLine(x, LCD_HEIGHT-data[sample+1][x], x+1, LCD_HEIGHT-data[sample+1][x+1], CH2COLOR);
     CheckSW();
  }  
#endif
}

void ClearAndDrawDot(int i) {
  int clear = 0;

  if (i <= 1)
    return;
  if (sample == 0)
    clear = 2;
#if 0
   for (int x=0; x<SAMPLES; x++) {
     GLCD.SetDot(x, LCD_HEIGHT-data[clear+0][x], WHITE);
     GLCD.SetDot(x, LCD_HEIGHT-data[clear+1][x], WHITE);
     GLCD.SetDot(x, LCD_HEIGHT-data[sample+0][x], BLACK);
     GLCD.SetDot(x, LCD_HEIGHT-data[sample+1][x], BLACK);
  }
#else
  tft.drawLine(i-1, LCD_HEIGHT-data[clear+0][i-1], i, LCD_HEIGHT-data[clear+0][i], BGCOLOR);
  tft.drawLine(i-1, LCD_HEIGHT-data[clear+1][i-1], i, LCD_HEIGHT-data[clear+1][i], BGCOLOR);
  if (ch0_mode != MODE_OFF)
    tft.drawLine(i-1, LCD_HEIGHT-data[sample+0][i-1], i, LCD_HEIGHT-data[sample+0][i], CH1COLOR);
  if (ch1_mode != MODE_OFF)
    tft.drawLine(i-1, LCD_HEIGHT-data[sample+1][i-1], i, LCD_HEIGHT-data[sample+1][i], CH2COLOR);
#endif
  DrawGrid(i);
}

void DrawGraph() {
   for (int x=0; x<SAMPLES; x++) {
     tft.drawPixel(x, LCD_HEIGHT-data[sample+0][x], CH1COLOR);
     tft.drawPixel(x, LCD_HEIGHT-data[sample+1][x], CH2COLOR);
  }
}

void ClearGraph() {
  int clear = 0;
  
  if (sample == 0)
    clear = 2;
  for (int x=0; x<SAMPLES; x++) {
     tft.drawPixel(x, LCD_HEIGHT-data[clear+0][x], BGCOLOR);
     tft.drawPixel(x, LCD_HEIGHT-data[clear+1][x], BGCOLOR);
  }
}

inline unsigned long adRead(byte ch, byte mode, int off)
{
  unsigned long a = analogRead(ch);
  a = ((a+off)*VREF[ch == ad_ch0 ? range0 : range1]+512) >> 10;
  a = a>=(LCD_HEIGHT+1) ? LCD_HEIGHT : a;
  if (mode == MODE_INV)
    return LCD_HEIGHT - a;
  return a;
}

void  loop() {
 
  if (trig_mode != TRIG_SCAN) {
      unsigned long st = millis();
      byte oad;
      if (trig_ch == 0)
        oad = adRead(ad_ch0, ch0_mode, ch0_off);
      else
        oad = adRead(ad_ch1, ch1_mode, ch1_off);
      for (;;) {
        byte ad;
        if (trig_ch == 0)
          ad = adRead(ad_ch0, ch0_mode, ch0_off);
        else
          ad = adRead(ad_ch1, ch1_mode, ch1_off);

        if (trig_edge == TRIG_E_UP) {
           if (ad >= trig_lv && ad > oad)
            break; 
        } else {
           if (ad <= trig_lv && ad < oad)
            break; 
        }
        oad = ad;

        CheckSW();
        if (trig_mode == TRIG_SCAN)
          break;
        if (trig_mode == TRIG_AUTO && (millis() - st) > 100)
          break; 
      }
  }
  
  // sample and draw depending on the sampling rate
    if (rate <= 5 && Start) {
    // change the index for the double buffer
    if (sample == 0)
      sample = 2;
    else
      sample = 0;

    if (rate == 0) { // full speed, channel 0 only
      unsigned long st = millis();
      for (int i=0; i<SAMPLES; i ++) {
        data[sample+0][i] = adRead(ad_ch0, ch0_mode, ch0_off);
      }
      for (int i=0; i<SAMPLES; i ++)
        data[sample+1][i] = 0;
      // Serial.println(millis()-st);
    } else if (rate == 1) { // full speed, channel 1 only
      unsigned long st = millis();
      for (int i=0; i<SAMPLES; i ++) {
        data[sample+1][i] = adRead(ad_ch1, ch1_mode, ch1_off);
      }
      for (int i=0; i<SAMPLES; i ++)
        data[sample+0][i] = 0;
      // Serial.println(millis()-st);
    } else if (rate == 2) { // full speed, dual channel
      unsigned long st = millis();
      for (int i=0; i<SAMPLES; i ++) {
        data[sample+0][i] = adRead(ad_ch0, ch0_mode, ch0_off);
        data[sample+1][i] = adRead(ad_ch1, ch1_mode, ch1_off);
      }
      // Serial.println(millis()-st);
    } else if (rate >= 3 && rate <= 5) { // .5ms, 1ms or 2ms sampling
      const unsigned long r_[] = {5000/DOTS_DIV, 10000/DOTS_DIV, 20000/DOTS_DIV};
      unsigned long st0 = millis();
      unsigned long st = micros();
      unsigned long r = r_[rate - 3];
      for (int i=0; i<SAMPLES; i ++) {
        while((st - micros())<r) ;
        st += r;
        data[sample+0][i] = adRead(ad_ch0, ch0_mode, ch0_off);
        data[sample+1][i] = adRead(ad_ch1, ch1_mode, ch1_off);
      }
      // Serial.println(millis()-st0);
    }
    ClearAndDrawGraph();
    CheckSW();
    DrawGrid();
    DrawText();
    //SendData(); //kirim data ke serial
  
  
  } else if (Start) { // 5ms - 500ms sampling
  // copy currently showing data to another
    if (sample == 0) {
      for (int i=0; i<SAMPLES; i ++) {
        data[2][i] = data[0][i];
        data[3][i] = data[1][i];
      }
    } else {
      for (int i=0; i<SAMPLES; i ++) {
        data[0][i] = data[2][i];
        data[1][i] = data[3][i];
      }      
    }

    const unsigned long r_[] = {50000/DOTS_DIV, 100000/DOTS_DIV, 200000/DOTS_DIV,
                      500000/DOTS_DIV, 1000000/DOTS_DIV, 2000000/DOTS_DIV, 
                      5000000/DOTS_DIV, 10000000/DOTS_DIV};
    unsigned long st0 = millis();
    unsigned long st = micros();
    for (int i=0; i<SAMPLES; i ++) {
      while((st - micros())<r_[rate-6]) {
        CheckSW();
        if (rate<6)
          break;
      }
      if (rate<6) { // sampling rate has been changed
        tft.fillScreen(BGCOLOR);
        break;
      }
      st += r_[rate-6];
      if (st - micros()>r_[rate-6])
          st = micros(); // sampling rate has been changed to shorter interval
      if (!Start) {
         i --;
         continue;
      }
      data[sample+0][i] = adRead(ad_ch0, ch0_mode, ch0_off);
      data[sample+1][i] = adRead(ad_ch1, ch1_mode, ch1_off);
      ClearAndDrawDot(i);     
    }
    // Serial.println(millis()-st0);
    DrawGrid();
    DrawText();
    //SendData(); //kirim data ke serial
  } else {
    CheckSW();
  }
  if (trig_mode == TRIG_ONE)
    Start = 0;
}
Jika membutuhkan info lebih lanjut dapat menghubungi saya melaui FB/FB Messenger di :
https://www.facebook.com/dani.ardianto.98

Module dapat dibeli di :
https://www.tokopedia.com/rajacell/etalase/arduino-board-module

Semoga bermanfaat
IND2906

LCD TFT : Membuat Digital Oscilloscope dengan Arduino Uno dan LCD TFT 2.4" Shield

Membuat DIY Digital Oscilloscope dengan Arduino Uno dan LCD TFT 2,4" Shield

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