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====== OLed ======

* [[https://randomnerdtutorials.com/micropython-oled-display-esp32-esp8266/|MicroPython: OLED Display with ESP32 and ESP8266]]
  * [[https://blog.martinfitzpatrick.com/displaying-images-oled-displays/|Displaying images on OLED screens]]
  * [[https://www.donskytech.com/micropython-interfacing-with-ssd1306-oled-display/|MicroPython: Interfacing with SSD1306 OLED display]]

**Thư viện:** [[https://github.com/1sitevn/esp32-micropython/blob/main/02.%20OLed/ssd1306.py|ssd1306.py]]

<file python boot.py>
import gc
import esp
from oled import OLed
from machine import Pin

esp.osdebug(None)
gc.collect()

oled21 = OLed(scl=22, sda=21)
</file>

<file python main.py>
import image_asset
from utime import sleep

while True:
  oled21.set_message("Test OLed...")

sleep(1)

oled21.display_menu(0, 5, 0)

sleep(1)

oled21.set_images(image_asset.girls)

sleep(1)
</file>

<file python oled.py>
import ssd1306
from machine import SoftI2C, Pin

class OLed:
    def __init__(self, scl, sda):
        self.scl = scl
        self.sda = sda
        
        self.i2c = SoftI2C(scl=Pin(scl), sda=Pin(sda))
        self.oled = ssd1306.SSD1306_I2C(128, 64, self.i2c)        
    
        self.menu_items = ["Option 1", "Option 2", "Option 3", "Option 4", "Option 5"]
        self.menu_selected_index = 0
        self.start_index = 0
        self.end_index = min(len(self.menu_items), 6)

def set_message(self, message, x = 0, y = 0, is_fill = True):
        if is_fill:
            self.oled.fill(0)

self.oled.text(message, x, y, 1)
        self.oled.show()

def set_images(self, image_pixels):
        self.oled.fill(0)
        
        line = 0
        for line_pixels in image_pixels:
            column = 0
            for pixel in line_pixels:
                self.oled.pixel(column, line, pixel)

column = column + 1
            
            line = line + 1
            
        self.oled.show()

def display_menu(self, start, end, selected):
        self.oled.fill(0)
        self.set_message("Setting:")
        
        for i in range(start, end):
            y = (i - start) * 10 + 16
            
            if i == selected:
                self.oled.text("-> " + self.menu_items[i], 0, y)
            else:
                self.oled.text(self.menu_items[i], 20, y)
        self.oled.show()
</file>

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