Waveshare RP2040-One, 4MB Flash MCU Board Based On Raspberry Pi RP2040

#
#
# main.py
#
# RP2040-ONE led usage and Temperature Display
#

import time
from machine import Pin, ADC
import rp2

max_lum =100
r =0
g =0
b =0
rgb =0

tm = 100
stm = 5
flag = 1

temp_sensor = ADC(4)
points_per_volt = 3.3 / 65535

# set up 24 bit shift register on pin 16
@rp2.asm_pio(sideset_init=rp2.PIO.OUT_LOW, out_shiftdir=rp2.PIO.SHIFT_LEFT, autopull=True, pull_thresh=24)
def ws2812():
T1 = 2
T2 = 5
T3 = 3
wrap_target()
label("bitloop")
out(x, 1) .side(0) [T3 - 1]
jmp(not_x, "do_zero") .side(1) [T1 - 1]
jmp("bitloop") .side(1) [T2 - 1]
label("do_zero")
nop() .side(0) [T2 - 1]
wrap()

# Create the StateMachine with the ws2812 program,
# outputting to Pin(16) as 24 bit shift register.
sm = rp2.StateMachine(0, ws2812, freq=8_000_000, sideset_base=Pin(16))

# Start the StateMachine, it will wait for data on its FIFO.
sm.active(1)

# Get internal temperature
def read_temp_c():
reading = temp_sensor.read_u16() * points_per_volt
temp_c = 27 - (reading - 0.706)/0.01721
return temp_c

# Set color of Led and Display with 24 bit stream
def colorset():
rgb =(r<<24) | (g<<16) | (b<<8)
sm.put(rgb)


# Color change
def fade():
flag = 1
r=0
g=0
b=0
rgb = 0
while flag<3:
for i in range(0,max_lum):
r=i
b=max_lum-i
rgb =(r<<24) | (g<<16) | (b<<8)
sm.put(rgb)
time.sleep_ms(stm)
time.sleep_ms(tm)
for i in range(0,max_lum):
g=i
r=max_lum-i
rgb =(r<<24) | (g<<16) | (b<<8)
sm.put(rgb)
time.sleep_ms(stm)
time.sleep_ms(tm)
for i in range(0,max_lum):
b=i
g=max_lum-i
rgb =(r<<24) | (g<<16) | (b<<8)
sm.put(rgb)
time.sleep_ms(stm)
time.sleep_ms(tm)
flag = flag + 1

# fade in color and intensity
# demonstrating led usage in one way
fade()

stm = 700
#
# or... here is another way
#
# set up 24 bit led colors to send to ws2812
#
# Led off
r=0
g=0
b=0
LOFF =(r<<24) | (g<<16) | (b<<8)
# White
r=60
g=60
b=60
White =(r<<24) | (g<<16) | (b<<8)
# Red
r=80
g=0
b=0
Red =(r<<24) | (g<<16) | (b<<8)
# Green
r=0
g=80
b=0
Green =(r<<24) | (g<<16) | (b<<8)
# Blue
r=0
g=0
b=80
Blue =(r<<24) | (g<<16) | (b<<8)

sm.put(LOFF)
time.sleep_ms(stm)
sm.put(Red)
time.sleep_ms(stm)
sm.put(White)
time.sleep_ms(stm)
sm.put(Blue)
time.sleep_ms(stm)
sm.put(Green)
time.sleep_ms(stm)
sm.put(LOFF)
time.sleep_ms(stm)

# Colors do not seem to blend
# only white,red,blue,green,off
# but here is a way to try a blend
stm = 900
r=10
g=0
b=0
colorset()
time.sleep_ms(stm)
time.sleep_ms(stm)
time.sleep_ms(stm)
sm.put(LOFF)
time.sleep_ms(stm)

# Show internal temperature
print("-------------------")
temp_c = read_temp_c()
print(temp_c, "deg Celcius")
temp_f = ((9 * temp_c)/5) + 32
print(temp_f, "deg Farenheit")
print("-------------------")

# State machine used as shift register set to Off
sm.active(0)