No picture appears on the ili9341 display

Phil-LJZ commented 3 months ago

I ran the following code but my display shows nothing, why is that? I am pretty sure my wiring is fine.

from machine import Pin, PWM
from ili9341 import ILI9341
from lcd_bus import SPIBus
from machine import SPI
import lcd_bus

import lvgl as lv

_BUFFER_SIZE = const(30720)

spi_bus = SPI.Bus(host=2, mosi=17, miso=7, sck=16)

display_bus = SPIBus(
    spi_bus = spi_bus,
    freq = 400000,
    dc = 18,
    cs = 9)

fb1 = display_bus.allocate_framebuffer(_BUFFER_SIZE, lcd_bus.MEMORY_INTERNAL | lcd_bus.MEMORY_DMA)
fb2 = display_bus.allocate_framebuffer(_BUFFER_SIZE, lcd_bus.MEMORY_INTERNAL | lcd_bus.MEMORY_DMA)

lv.init()

display = ILI9341(
    data_bus=display_bus,
    display_width=320,
    display_height=240,
    frame_buffer1=fb1,
    frame_buffer2=fb2,
    reset_pin=8,
    backlight_pin=15,
    backlight_on_state=0,
    color_space=lv.COLOR_FORMAT.RGB565)

# backlight = PWM(Pin(15))
# backlight.freq(4000)
# backlight.duty(1023)

display.init()
display.invert_colors()
display.set_backlight(100)

scrn = lv.obj()
scrn.set_style_bg_color(lv.color_hex(0xffb6c1), 0)

slider = lv.slider(scrn)
slider.set_size(300, 50)
slider.center()

label = lv.label(scrn)
label.set_text('HELLO WORLD!')
label.align(lv.ALIGN.CENTER, 0, -50)

straga commented 3 months ago

@Phil-CN what was wrong?

Phil-LJZ commented 2 months ago

@Phil-CN出了什么问题？

Hahaha thanks bro, no problem now

lvgl-micropython / lvgl_micropython

No picture appears on the ili9341 display #105