電子工作コンテスト あと1日

概要

電子工作コンテスト、見つけたので、やってみる。

最終決定版プログラム

import array
import time
import rp2
from machine import ADC, Pin
vr_color = ADC(Pin(26))
vr_bright = ADC(Pin(27))
V_REF = 3.3
@rp2.asm_pio(sideset_init = rp2.PIO.OUT_LOW, autopull = True, pull_thresh = 24, out_shiftdir = rp2.PIO.SHIFT_LEFT)
def ws2812():
   label("loop")
   out(x, 1)
   nop().side(1)
   jmp(not_x, "tugi")
   nop()
   nop()
   nop().side(0)
   label("tugi")
   nop().side(0)
   nop()
   jmp("loop")

sm = rp2.StateMachine(0, ws2812, freq = 5_000_000, sideset_base = Pin(17))
sm.active(1)

def main():
   global sm
   NUM_LEDS = 7
   ar = array.array("I", [0 for _ in range(NUM_LEDS)])
   last_print_time = time.ticks_ms()
   print("start (Dual VR Mode - No Animation)")
   while True:
      raw_color = vr_color.read_u16()
      raw_bright = vr_bright.read_u16()
      mix = raw_color / 65535.0
      brightness = raw_bright / 65535.0
      current_time = time.ticks_ms()
      if time.ticks_diff(current_time, last_print_time) >= 1000:
         print(f"VR1(Color): {mix:.2f} | VR2(Bright): {brightness:.2f}")
         last_print_time = current_time
      pos = int(mix * 299)
      if pos < 100:
         g_base = 100 - pos
         b_base = pos
         r_base = 0
      elif pos < 200:
         pos_sub = pos - 100
         g_base = 0
         b_base = 100 - pos_sub
         r_base = pos_sub
      else:
         pos_sub = pos - 200
         g_base = pos_sub
         b_base = 0
         r_base = 100 - pos_sub
      r = int(r_base * brightness)
      g = int(g_base * brightness)
      b = int(b_base * brightness)
      r >>= 1
      g >>= 1
      b >>= 1
      led_value = (r << 16) | (g << 8) | b
      for j in range(NUM_LEDS):
         ar[j] = led_value
      sm.put(ar, 8)
      time.sleep_us(100)
      time.sleep_ms(30)

if __name__ == "__main__":
    main()

以上。