CircuitPython to download bmp images from web, and display on ILI9341 SPI TFT.

Last post show ESP32-S3 running CircuitPython 9.0.3 to display on ILI9341 SPI LCD, detect FT6336 Cap. Touch, and load bmp from SD card using adafruit_imageload.

The post show exercise to download bmp images from internet and display on ILI9341 SPI LCD. Basically, the network part follow the CircuitPython  adafruit_imageload example imageload_from_web.py.


In the original example, bmp file is downloaded from https://raw.githubusercontent.com/adafruit/Adafruit_CircuitPython_ImageLoad/main/examples/images/4bit.bmp. In this exercise, my own Python http server was setup on Raspberry Pi 5/64-bit Raspberry Pi OS (bookworm), to store my bmp images. Enter the command in Terminal: 
python3 -m http.server
Or save it in a executable shell script as shown in the video.

Exercise code:

cpyS3_ili9341_imageload_from_web.py 
"""
CircuitPython exercise run on ESP32-S3,
to load image from web and display on ILI9341 SPI LCD.

ref:
https://github.com/adafruit/Adafruit_CircuitPython_ImageLoad/blob/main/examples/imageload_from_web.py
---------------------------

Display Module:
3.2 inch IPS SPI Module ILI9341 with cap. touch FT6336U

Test on:
dev. board:     Espressif ESP32-S3-DevKitC-1
CircuitPython:  9.0.3

Libraries needed:
- adafruit_ili9341.mpy
- import adafruit_imageload folder
- adafruit_requests.mpy
- adafruit_connection_manager.py

"""
import os, sys
import board
import busio
import terminalio
import displayio
import fourwire
import adafruit_ili9341

import adafruit_imageload

import wifi
import socketpool
import adafruit_requests as requests
import ssl
from io import BytesIO

ILI9341_INVOFF = 0x20   #Display Inversion OFF
ILI9341_INVON  = 0x21   #Display Inversion ON

# Release any resources currently in use for the displays
displayio.release_displays()

#===init display ======================
#Connection to ILI9341/SD
DISP_CS  = board.IO17
DISP_RES = board.IO16
DISP_DC  = board.IO15
SPI_MOSI = board.IO7
SPI_SCL  = board.IO6
DISP_BL  = board.IO5
SPI_MISO = board.IO4
SD_CS    = board.IO43

spi = busio.SPI(clock=SPI_SCL,
                MOSI=SPI_MOSI,
                MISO=SPI_MISO)

#On CircuitPython 9  FourWire moved from displayio to fourwire
display_bus = fourwire.FourWire(spi, command=DISP_DC, chip_select=DISP_CS, reset=DISP_RES)

#--- Setup display ---
# for 3.2" 320x240 SPI ILI9341 TFT
disp_width = 320
disp_height = 240
display = adafruit_ili9341.ILI9341(display_bus,
                                   width=disp_width,
                                   height=disp_height,
                                   backlight_pin=DISP_BL,
                                   )

display_bus.send(int(ILI9341_INVON), "") #invert color
isInverted = True

sysinfo = sys.implementation[0] + " " + os.uname()[3] + "\nrun on " + os.uname()[4]
drv_info = adafruit_ili9341.__name__ + " " + adafruit_ili9341.__version__ + "\n" + \
           adafruit_imageload.__name__ + " " + adafruit_imageload.__version__
print("=============================================")
print("coXXect.blogspot.com")
print("---------------------------------------------")
print(sys.implementation[0], os.uname()[3],
      "\nrun on", os.uname()[4])
print("=============================================")
print(drv_info)
print()

# Make the display context
bgGroup = displayio.Group()
display.root_group = bgGroup

bg_bitmap = displayio.Bitmap(display.width, display.height, 1)  # with one color
bg_palette = displayio.Palette(1)
bg_palette[0] = 0x0000FF # Blue
bg_sprite = displayio.TileGrid(bg_bitmap, pixel_shader=bg_palette, x=0, y=0)
bgGroup.append(bg_sprite)

# Prepare WiFi connection
# To simplify, both ssd and password are hard coded here.
wifi.radio.connect("ssid", "password")

print("Connected -", wifi.radio.ap_info.ssid)
print("My IP address is", wifi.radio.ipv4_address)

socket = socketpool.SocketPool(wifi.radio)
https = requests.Session(socket, ssl.create_default_context())

# pylint: disable=line-too-long
# sample bitmap from Adafruit_CircuitPython_ImageLoad example
url = "https://raw.githubusercontent.com/adafruit/Adafruit_CircuitPython_ImageLoad/main/examples/images/4bit.bmp"
# load from my web sarver
#url = "http://192.168.67.140:8000/image_01.bmp"

print("Fetching text from %s" % url)
response = https.get(url)
print("GET complete")

bytes_img = BytesIO(response.content)
image, palette = adafruit_imageload.load(bytes_img)

print("========================")
print("image:")
print("image.width:", image.width)
print("image.height:", image.height)
print("image.bits_per_value:", image.bits_per_value)


img_sprite = displayio.TileGrid(image, pixel_shader=palette,
                                x=int((display.width-image.width)/2),
                                y=int((display.height-image.height)/2))
bgGroup.append(img_sprite)

print()
print("~ bye ~")

cpyS3_ili9341_imageload_from_web_loop.py, loop to download and display number of bmp repeatly. 
"""
CircuitPython exercise run on ESP32-S3,
to load image from web and display on ILI9341 SPI LCD, repeatly.

ref:
https://github.com/adafruit/Adafruit_CircuitPython_ImageLoad/blob/main/examples/imageload_from_web.py
---------------------------

Display Module:
3.2 inch IPS SPI Module ILI9341 with cap. touch FT6336U

Test on:
dev. board:     Espressif ESP32-S3-DevKitC-1
CircuitPython:  9.0.3

Libraries needed:
- adafruit_ili9341.mpy
- import adafruit_imageload folder
- adafruit_requests.mpy
- adafruit_connection_manager.py

"""
import os, sys
import board
import busio
import terminalio
import displayio
import fourwire
import adafruit_ili9341

import adafruit_imageload

import wifi
import socketpool
import adafruit_requests as requests
import ssl
from io import BytesIO

ILI9341_INVOFF = 0x20   #Display Inversion OFF
ILI9341_INVON  = 0x21   #Display Inversion ON

# Release any resources currently in use for the displays
displayio.release_displays()

#===init display ======================
#Connection to ILI9341/SD
DISP_CS  = board.IO17
DISP_RES = board.IO16
DISP_DC  = board.IO15
SPI_MOSI = board.IO7
SPI_SCL  = board.IO6
DISP_BL  = board.IO5
SPI_MISO = board.IO4
SD_CS    = board.IO43

spi = busio.SPI(clock=SPI_SCL,
                MOSI=SPI_MOSI,
                MISO=SPI_MISO)

#On CircuitPython 9  FourWire moved from displayio to fourwire
display_bus = fourwire.FourWire(spi, command=DISP_DC, chip_select=DISP_CS, reset=DISP_RES)

#--- Setup display ---
# for 3.2" 320x240 SPI ILI9341 TFT
disp_width = 320
disp_height = 240
display = adafruit_ili9341.ILI9341(display_bus,
                                   width=disp_width,
                                   height=disp_height,
                                   backlight_pin=DISP_BL,
                                   )

display_bus.send(int(ILI9341_INVON), "") #invert color
isInverted = True

sysinfo = sys.implementation[0] + " " + os.uname()[3] + "\nrun on " + os.uname()[4]
drv_info = adafruit_ili9341.__name__ + " " + adafruit_ili9341.__version__ + "\n" + \
           adafruit_imageload.__name__ + " " + adafruit_imageload.__version__
print("=============================================")
print("coXXect.blogspot.com")
print("---------------------------------------------")
print(sys.implementation[0], os.uname()[3],
      "\nrun on", os.uname()[4])
print("=============================================")
print(drv_info)
print()

# Make the display context
bgGroup = displayio.Group()
display.root_group = bgGroup

bg_bitmap = displayio.Bitmap(display.width, display.height, 1)  # with one color
bg_palette = displayio.Palette(1)
bg_palette[0] = 0x0000FF # Blue
bg_sprite = displayio.TileGrid(bg_bitmap, pixel_shader=bg_palette, x=0, y=0)
bgGroup.append(bg_sprite)

# Prepare WiFi connection
# To simplify, both ssd and password are hard coded here.
wifi.radio.connect("ssid", "password")

print("Connected -", wifi.radio.ap_info.ssid)
print("My IP address is", wifi.radio.ipv4_address)

socket = socketpool.SocketPool(wifi.radio)
https = requests.Session(socket, ssl.create_default_context())

images_url = "http://192.168.67.140:8000/"
bmpFiles = ["image_01.bmp", "image_02.bmp", "image_03.bmp", "image_04.bmp", "image_05.bmp"]
image_Tile = None

while True:
    for b in bmpFiles:
        url = images_url+b
        print("Fetching text from %s" % url)
        response = https.get(url)
        print("GET complete")
        
        bytes_img = BytesIO(response.content)
        image, palette = adafruit_imageload.load(bytes_img)
        
        if image_Tile is None:
            image_Tile = displayio.TileGrid(image, pixel_shader=palette, x=0, y=0)
            bgGroup.append(image_Tile)
        else:
            image_Tile.bitmap = image
            image_Tile.pixel_shader = palette

print()
print("~ bye ~")


Comments

Post a Comment

Popular posts from this blog

480x320 TFT/ILI9488 SPI wih EP32C3 (arduino-esp32) using Arduino_GFX Library

Image
Display on 3.5 inch 480x320 TFT with SPI ILI9488 (SKU:MSP3520) with XIAO EP32C3 (arduino-esp32) using Arduino_GFX Library. Install GFX Library for Arduino (Arduino_GFX) in Library Manager. Arduino_GFX is a Arduino graphics library supporting various displays with various data bus interfaces. This library start rewrite from Adafruit_GFX, LovyanGFX, TFT_eSPI, Ucglib, and more... Connection:      Connection between XIAO ESP32C3 and      3.5" 480x320 TFT with SPI ILI9488 (SKU:MSP3520)      XIAO ESP32C3                        +-------------+           +---------|GPIO2    5V      |          | +-----|GPIO3    GND    |-----------+ | +-|-----|GPIO4    3V3    |---------+ | | | | +---|GPIO5    GPIO10|-----...
Read more

my dev.tools - FNIRSI 2C23T 3-in-1 Dual Channel Oscilloscope/Multimeter/Signal Generator

Image
FNIRSI 2C23T 3-in-1 Dual Channel Oscilloscope/Multimeter/Signal Generator Steps to upgrade of FNIRSI 2C23T 3-in-1 : Remark@2024-03-23: Please check the comment by dmitriivanov5330 in the video. How to distinguish the hardware? please press menu , and if you can see the words in Setting: "Hardware version No.:XXXXX " then the device is made with latest hardware, it has the latest firmware, and now it doesn't need to upgrade.  If you can not see the words in Setting: "Hardware version No.:XXXXX ", then it is made with old hardware, and it can be upgraded with firmware 2.0.2, and if you confirm this, the firmware for the device with old hardware is attached.  By the way, the firmware 2.0.2 only fixes device with old hardware. The device with new hardware can not use this firmware to upgrade. - Download firmware from FNIRSI Official Web Site - Connect USB to PC - While 2C23T is OFF, press and hold MENU button, then press POWER button to power...
Read more