RaspberryPi with OLED

IOT(Internet of Things)/Basic/RaspberryPi_OLED_Interface/Code/animation.py

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+import machine
+import ssd1306
+from time import sleep
+import math
+# Initialize the I2C communication
+i2c = machine.SoftI2C(scl=machine.Pin(5), sda=machine.Pin(4))
+# Reset the OLED display (optional)
+pin = machine.Pin(16, machine.Pin.OUT)
+pin.value(0)  # Set GPIO16 low to reset OLED
+pin.value(1)  # While OLED is running, set GPIO16 high
+# Create an instance of the SSD1306 OLED driver
+oled_width = 128
+oled_height = 64
+oled = ssd1306.SSD1306_I2C(oled_width, oled_height, i2c)
+# Function to clear the OLED screen
+def clear_screen():
+    oled.fill(0)
+    oled.show()
+# Animation parameters
+rocket_height = 20  # Make the rocket go higher
+rocket_x = oled_width // 2
+rocket_y = oled_height
+# Function to draw a circle at the given position
+def draw_circle(x, y, radius):
+    for i in range(radius * 2):
+        for j in range(radius * 2):
+            distance = math.sqrt((i - radius) ** 2 + (j - radius) ** 2)
+            if distance < radius:
+                oled.pixel(x - radius + i, y - radius + j, 1)
+# Function to display the bursting pattern
+def display_burst_pattern(x, y, radius, iterations):
+    for r in range(1, radius, max(1, int(radius/iterations))):
+        clear_screen()
+        draw_circle(x, y, r)
+        oled.show()
+        sleep(0.03)
+# Main animation loop
+try:
+    while True:
+        # Rocket animation: Move the rocket upwards
+        for y in range(oled_height, oled_height - rocket_height, -1):
+            clear_screen()
+            oled.rect(rocket_x - 2, y - rocket_height, 4, rocket_height, 1)
+            oled.show()
+            sleep(0.1)
+        # Burst animation: Display the bursting pattern
+        burst_x = rocket_x
+        burst_y = oled_height - rocket_height
+        burst_radius = 40  # Make the bursts 5 times bigger
+        burst_iterations = 20
+        display_burst_pattern(burst_x, burst_y, burst_radius, burst_iterations)
+except KeyboardInterrupt:
+    clear_screen()

IOT(Internet of Things)/Basic/RaspberryPi_OLED_Interface/Code/main.py

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+import machine
+from machine import Pin, SoftI2C
+import ssd1306
+from time import sleep
+i2c = machine.SoftI2C(scl=machine.Pin(5), sda=machine.Pin(4))
+pin = machine.Pin(16, machine.Pin.OUT)
+pin.value(0) 
+pin.value(1) 
+oled_width = 128
+oled_height = 64
+oled = ssd1306.SSD1306_I2C(oled_width, oled_height, i2c)
+oled.fill(0)
+oled.text('Hello, World!', 0, 10)
+oled.show()

IOT(Internet of Things)/Basic/RaspberryPi_OLED_Interface/Code/square.py

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+import machine
+import ssd1306
+from time import sleep
+# Initialize the I2C communication
+i2c = machine.SoftI2C(scl=machine.Pin(5), sda=machine.Pin(4))
+# Reset the OLED display (optional)
+pin = machine.Pin(16, machine.Pin.OUT)
+pin.value(0)  # Set GPIO16 low to reset OLED
+pin.value(1)  # While OLED is running, set GPIO16 high
+# Create an instance of the SSD1306 OLED driver
+oled_width = 128
+oled_height = 64
+oled = ssd1306.SSD1306_I2C(oled_width, oled_height, i2c)
+# Function to draw a square in the center
+def draw_square():
+    square_size = 20
+    center_x = oled_width // 2
+    center_y = oled_height // 2
+    x0 = center_x - square_size // 2
+    y0 = center_y - square_size // 2
+    x1 = center_x + square_size // 2
+    y1 = center_y + square_size // 2
+    oled.rect(x0, y0, square_size, square_size, 1)
+# Clear the OLED display
+oled.fill(0)
+# Draw a square in the center of the OLED
+draw_square()
+# Update the OLED display to show the text and square
+oled.show()

IOT(Internet of Things)/Basic/RaspberryPi_OLED_Interface/Code/ssd1306.py

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+from micropython import const
+import framebuf
+
+SET_CONTRAST = const(0x81)
+SET_ENTIRE_ON = const(0xA4)
+SET_NORM_INV = const(0xA6)
+SET_DISP = const(0xAE)
+SET_MEM_ADDR = const(0x20)
+SET_COL_ADDR = const(0x21)
+SET_PAGE_ADDR = const(0x22)
+SET_DISP_START_LINE = const(0x40)
+SET_SEG_REMAP = const(0xA0)
+SET_MUX_RATIO = const(0xA8)
+SET_COM_OUT_DIR = const(0xC0)
+SET_DISP_OFFSET = const(0xD3)
+SET_COM_PIN_CFG = const(0xDA)
+SET_DISP_CLK_DIV = const(0xD5)
+SET_PRECHARGE = const(0xD9)
+SET_VCOM_DESEL = const(0xDB)
+SET_CHARGE_PUMP = const(0x8D)
+
+
+class SSD1306(framebuf.FrameBuffer):
+    def __init__(self, width, height, external_vcc):
+        self.width = width
+        self.height = height
+        self.external_vcc = external_vcc
+        self.pages = self.height // 8
+        self.buffer = bytearray(self.pages * self.width)
+        super().__init__(self.buffer, self.width, self.height, framebuf.MONO_VLSB)
+        self.init_display()
+    def init_display(self):
+        for cmd in (
+            SET_DISP | 0x00,  # off
+            # address setting
+            SET_MEM_ADDR,
+            0x00,  # horizontal
+            # resolution and layout
+            SET_DISP_START_LINE | 0x00,
+            SET_SEG_REMAP | 0x01,  
+            SET_MUX_RATIO,
+            self.height - 1,
+            SET_COM_OUT_DIR | 0x08,  
+            SET_DISP_OFFSET,
+            0x00,
+            SET_COM_PIN_CFG,
+            0x02 if self.width > 2 * self.height else 0x12,
+            # timing and driving scheme
+            SET_DISP_CLK_DIV,
+            0x80,
+            SET_PRECHARGE,
+            0x22 if self.external_vcc else 0xF1,
+            SET_VCOM_DESEL,
+            0x30,  # 0.83*Vcc
+            # display
+            SET_CONTRAST,
+            0xFF,  # maximum
+            SET_ENTIRE_ON, 
+            SET_NORM_INV,  
+            # charge pump
+            SET_CHARGE_PUMP,
+            0x10 if self.external_vcc else 0x14,
+            SET_DISP | 0x01,
+        ):  
+            self.write_cmd(cmd)
+        self.fill(0)
+        self.show()
+    def poweroff(self):
+        self.write_cmd(SET_DISP | 0x00)
+    def poweron(self):
+        self.write_cmd(SET_DISP | 0x01)
+    def contrast(self, contrast):
+        self.write_cmd(SET_CONTRAST)
+        self.write_cmd(contrast)
+    def invert(self, invert):
+        self.write_cmd(SET_NORM_INV | (invert & 1))
+    def show(self):
+        x0 = 0
+        x1 = self.width - 1
+        if self.width == 64:
+            # displays with width of 64 pixels are shifted by 32
+            x0 += 32
+            x1 += 32
+        self.write_cmd(SET_COL_ADDR)
+        self.write_cmd(x0)
+        self.write_cmd(x1)
+        self.write_cmd(SET_PAGE_ADDR)
+        self.write_cmd(0)
+        self.write_cmd(self.pages - 1)
+        self.write_data(self.buffer)
+class SSD1306_I2C(SSD1306):
+    def __init__(self, width, height, i2c, addr=0x3C, external_vcc=False):
+        self.i2c = i2c
+        self.addr = addr
+        self.temp = bytearray(2)
+        self.write_list = [b"\x40", None]  
+        super().__init__(width, height, external_vcc)
+    def write_cmd(self, cmd):
+        self.temp[0] = 0x80  
+        self.temp[1] = cmd
+        self.i2c.writeto(self.addr, self.temp)
+    def write_data(self, buf):
+        self.write_list[1] = buf
+        self.i2c.writevto(self.addr, self.write_list)
+class SSD1306_SPI(SSD1306):
+    def __init__(self, width, height, spi, dc, res, cs, external_vcc=False):
+        self.rate = 10 * 1024 * 1024
+        dc.init(dc.OUT, value=0)
+        res.init(res.OUT, value=0)
+        cs.init(cs.OUT, value=1)
+        self.spi = spi
+        self.dc = dc
+        self.res = res
+        self.cs = cs
+        import time
+        self.res(1)
+        time.sleep_ms(1)
+        self.res(0)
+        time.sleep_ms(10)
+        self.res(1)
+        super().__init__(width, height, external_vcc)
+    def write_cmd(self, cmd):
+        self.spi.init(baudrate=self.rate, polarity=0, phase=0)
+        self.cs(1)
+        self.dc(0)
+        self.cs(0)
+        self.spi.write(bytearray([cmd]))
+        self.cs(1)
+    def write_data(self, buf):
+        self.spi.init(baudrate=self.rate, polarity=0, phase=0)
+        self.cs(1)
+        self.dc(1)
+        self.cs(0)
+        self.spi.write(buf)
+        self.cs(1)