# W55RP20-EVB-PICO fast adc example
# Read 800 samples and display as svg
# Generates a Webserver and configures the PiPico W as accesspoint
#
# https://www.mikrocontroller.net/topic/574866?goto=7816655#7816655
#
# 25-01-24 mchris
#
# To test, you can use your webbrowser
# you have to find out the ip-address of the board first ( should be printed in the Micropython console on startup )
#
# example: http://192.168.178.48/
#
# 2025-03-11 mchris
#
# !! Use it at you own risk, no warraties, only for test purposes, no security implemented !!
#
from machine import Pin, WIZNET_PIO_SPI
import network
import socket
import time
import machine
import json
import fastadc
spi = WIZNET_PIO_SPI(baudrate=31_250_000, mosi=Pin(23), miso=Pin(22), sck=Pin(21)) # W55RP20 PIO_SPI
cs = machine.Pin(5, machine.Pin.OUT)
# Initialize Ethernet (W5500)
eth = network.WIZNET5K(spi, Pin(20), Pin(25)) # spi, cs, reset pin
eth.active(True)
# HTML content with the sine wave JavaScript logic (similar to your canvas)
html = """
pico w SVG oszi
W55RP20-EVB-PICO Oszi
adc0 gp26
"""
# Wait for IP address
while not eth.isconnected():
print("Waiting for Ethernet connection...")
time.sleep(1)
print("Connected! IP:", eth.ifconfig())
# Simple HTTP Server
def http_server():
server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server_socket.bind(('0.0.0.0', 80))
server_socket.listen(5)
print('Listening on port 80...')
adc = fastadc.FastADC(0, 800)
counter=0
while True:
conn, addr = server_socket.accept()
#print('Connection from', addr)
request = conn.recv(1024)
#print('Request:', request)
counter=counter+1
print(counter)
if 'GET / ' in request or 'GET /index.html' in request:
conn.send('HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n' + html)
elif 'GET /data' in request:
signal,dt = adc.get_samples()
conn.send('HTTP/1.1 200 OK\r\nContent-Type: application/json\r\n\r\n' + json.dumps(signal))
else:
conn.send('HTTP/1.1 404 NOT FOUND\r\n\r\n')
conn.close()
# Start the server
http_server()