# Walking Figure rev_01

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    - Project: # Walking Figure
    - Source Code NOT compiled for: ESP32 DevKit V1
    - Source Code created on: 2026-01-09 03:42:24

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* I have a I2C Oled Display and I want to code it to */
    /* show The animation of walking in wokwi */
/****** END SYSTEM REQUIREMENTS *****/


/* START CODE */

/****** DEFINITION OF LIBRARIES *****/
#include <Wire.h>
#include <Adafruit_SSD1306.h>   //https://github.com/stblassitude/Adafruit_SSD1306_Wemos_OLED.git
#include <U8g2_for_Adafruit_GFX.h>  //https://github.com/olikraus/U8g2_for_Adafruit_GFX

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void initializeDisplay(void);
void drawWalkingAnimation(void);
void drawWalkingFigureFrame1(int16_t xPos);
void drawWalkingFigureFrame2(int16_t xPos);
void drawWalkingFigureFrame3(int16_t xPos);
void drawWalkingFigureFrame4(int16_t xPos);

/***** DEFINITION OF I2C PINS *****/
const uint8_t oledDisplay_SSD1306OledDisplay_I2C_PIN_SDA_D21        = 21;
const uint8_t oledDisplay_SSD1306OledDisplay_I2C_PIN_SCL_D22        = 22;
const uint8_t oledDisplay_SSD1306OledDisplay_I2C_SLAVE_ADDRESS      = 60;

/****** DEFINITION OF DISPLAY PARAMETERS *****/
const uint16_t SCREEN_WIDTH = 128;
const uint16_t SCREEN_HEIGHT = 64;
const uint8_t OLED_RESET_PIN = -1;
const uint16_t I2C_ADDRESS = 0x3C;

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET_PIN);
U8G2_FOR_ADAFRUIT_GFX u8g2Display;

/****** ANIMATION PARAMETERS *****/
const uint16_t ANIMATION_DELAY_MS = 500;
const uint16_t FIGURE_X_START = 0;
const uint16_t FIGURE_X_SPEED = 5;
int16_t figureCurrentXPos = FIGURE_X_START;
uint8_t animationFrameIndex = 0;

void setup(void)
{
    // Initialize Serial communication for debugging (optional)
    Serial.begin(115200);
    delay(100);

    // Initialize I2C communication with custom pins
    Wire.begin(oledDisplay_SSD1306OledDisplay_I2C_PIN_SDA_D21, oledDisplay_SSD1306OledDisplay_I2C_PIN_SCL_D22);
    delay(100);

    // Initialize the OLED display
    initializeDisplay();
}

void loop(void)
{
    // Clear the display buffer
    display.clearDisplay();

    // Draw the walking animation
    drawWalkingAnimation();

    // Update the display with the buffer contents
    display.display();

    // Delay between animation frames
    delay(ANIMATION_DELAY_MS);
}

void initializeDisplay(void)
{
    // Initialize display with I2C address
    if (!display.begin(SSD1306_SWITCHCAPVCC, I2C_ADDRESS))
    {
        Serial.println(F("SSD1306 allocation failed"));
        while (1);
    }

    // Initialize U8g2 for Adafruit GFX to enable advanced font rendering
    u8g2Display.begin(display);

    // Clear the display
    display.clearDisplay();
    display.display();

    Serial.println(F("Display initialized successfully"));
}

void drawWalkingAnimation(void)
{
    // Select the appropriate frame based on animation index
    switch (animationFrameIndex)
    {
        case 0:
            // Frame 1: Left leg forward
            drawWalkingFigureFrame1(figureCurrentXPos);
            break;

        case 1:
            // Frame 2: Both legs together
            drawWalkingFigureFrame2(figureCurrentXPos);
            break;

        case 2:
            // Frame 3: Right leg forward
            drawWalkingFigureFrame3(figureCurrentXPos);
            break;

        case 3:
            // Frame 4: Both legs together (stepping phase)
            drawWalkingFigureFrame4(figureCurrentXPos);
            break;

        default:
            animationFrameIndex = 0;
            break;
    }

    // Update animation frame index
    animationFrameIndex++;
    if (animationFrameIndex >= 4)
    {
        animationFrameIndex = 0;
    }

    // Update figure position for walking movement
    figureCurrentXPos += FIGURE_X_SPEED;

    // Reset position when figure reaches the right edge of the screen
    if (figureCurrentXPos > SCREEN_WIDTH)
    {
        figureCurrentXPos = FIGURE_X_START;
    }
}

void drawWalkingFigureFrame1(int16_t xPos)
{
    // Frame 1: Left leg forward, right leg back
    // Head (circle)
    display.fillCircle(xPos + 8, 20, 5, SSD1306_WHITE);

    // Body (vertical line)
    display.drawLine(xPos + 8, 25, xPos + 8, 40, SSD1306_WHITE);

    // Left arm (forward)
    display.drawLine(xPos + 8, 28, xPos + 2, 25, SSD1306_WHITE);

    // Right arm (back)
    display.drawLine(xPos + 8, 28, xPos + 14, 25, SSD1306_WHITE);

    // Left leg (forward)
    display.drawLine(xPos + 8, 40, xPos + 4, 55, SSD1306_WHITE);

    // Right leg (back)
    display.drawLine(xPos + 8, 40, xPos + 12, 55, SSD1306_WHITE);
}

void drawWalkingFigureFrame2(int16_t xPos)
{
    // Frame 2: Both legs in middle position (stepping transition)
    // Head (circle)
    display.fillCircle(xPos + 8, 20, 5, SSD1306_WHITE);

    // Body (vertical line)
    display.drawLine(xPos + 8, 25, xPos + 8, 40, SSD1306_WHITE);

    // Left arm (middle position)
    display.drawLine(xPos + 8, 28, xPos + 3, 28, SSD1306_WHITE);

    // Right arm (middle position)
    display.drawLine(xPos + 8, 28, xPos + 13, 28, SSD1306_WHITE);

    // Left leg (middle position)
    display.drawLine(xPos + 8, 40, xPos + 6, 55, SSD1306_WHITE);

    // Right leg (middle position)
    display.drawLine(xPos + 8, 40, xPos + 10, 55, SSD1306_WHITE);
}

void drawWalkingFigureFrame3(int16_t xPos)
{
    // Frame 3: Right leg forward, left leg back
    // Head (circle)
    display.fillCircle(xPos + 8, 20, 5, SSD1306_WHITE);

    // Body (vertical line)
    display.drawLine(xPos + 8, 25, xPos + 8, 40, SSD1306_WHITE);

    // Left arm (back)
    display.drawLine(xPos + 8, 28, xPos + 14, 25, SSD1306_WHITE);

    // Right arm (forward)
    display.drawLine(xPos + 8, 28, xPos + 2, 25, SSD1306_WHITE);

    // Left leg (back)
    display.drawLine(xPos + 8, 40, xPos + 12, 55, SSD1306_WHITE);

    // Right leg (forward)
    display.drawLine(xPos + 8, 40, xPos + 4, 55, SSD1306_WHITE);
}

void drawWalkingFigureFrame4(int16_t xPos)
{
    // Frame 4: Both legs in middle position (stepping transition)
    // Head (circle)
    display.fillCircle(xPos + 8, 20, 5, SSD1306_WHITE);

    // Body (vertical line)
    display.drawLine(xPos + 8, 25, xPos + 8, 40, SSD1306_WHITE);

    // Left arm (middle position)
    display.drawLine(xPos + 8, 28, xPos + 13, 28, SSD1306_WHITE);

    // Right arm (middle position)
    display.drawLine(xPos + 8, 28, xPos + 3, 28, SSD1306_WHITE);

    // Left leg (middle position)
    display.drawLine(xPos + 8, 40, xPos + 10, 55, SSD1306_WHITE);

    // Right leg (middle position)
    display.drawLine(xPos + 8, 40, xPos + 6, 55, SSD1306_WHITE);
}

/* END CODE */