使用sprkfun的micro:bit底座測試neopixel WS2812b燈控的功能

sprkfun的micro:bit底座的資料：micro:bit Breakout Board Hookup Guide

micro:bit版本：V2

MakeCode測試：

擴展套件：Adafruit Neopixel Driver

積木程式：

修改上圖 Pin腳位，測試結果Pin 0, 1, 2, 5, 8, 9, 11, 12, 13, 14, 15, 16可以使用neopixel。

改採Python Editor：

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from microbit import * import neopixel from random import randint # Setup the Neopixel strip on pin0 with a length of 8 pixels np = neopixel.NeoPixel(pin0, 16) np.clear() while True: #Iterate over each LED in the strip for pixel_id in range(0, len(np)): red = randint(0, 255) green = randint(0, 255) blue = randint(0, 255) # Assign the current LED a random red, green and blue value between 0 and 60 np[pixel_id] = (red, green, blue) # Display the current pixel data on the Neopixel strip np.show() sleep(300)

測試結果Pin 0~16都可以使用neopixel，但Pin 3, 4,6, 7, 10會使5x5 矩陣LED，造成不正常顯示，其主要原因是這幾支腳位做為LED Col使用。

micro:bit -悟空板(WuKong)：NeoPixel測試 (Python版)

範例一：分別以紅色、綠色、藍色、白色點亮悟空板上的四顆燈 

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# Imports go at the top from microbit import * import neopixel np = neopixel.NeoPixel(pin16, 4) # Code in a 'while True:' loop repeats forever while True: np[0] = (255, 0, 0) np[1] = (0, 255, 0) np[2] = (0, 0, 255) np[3] = (255, 255, 255) np.show()

執行結果：

範例二：同範例一，顯示資料用串列變數來儲存

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# Imports go at the top from microbit import * import neopixel np = neopixel.NeoPixel(pin16, 4) leds=[(255,0,0), (0,255,0), (0,0,255), (255,255,255)] # Code in a 'while True:' loop repeats forever while True: np[0] = leds[0] np[1] = leds[1] np[2] = leds[2] np[3] = leds[3] np.show()

執行結果同上題

範列三：每隔0.5秒燈色旋轉

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# Imports go at the top from microbit import * import neopixel np = neopixel.NeoPixel(pin16, 4) i = 0 leds=[(255,0,0), (0,255,0), (0,0,255), (255,255,255)] # Code in a 'while True:' loop repeats forever while True: np[0] = leds[i] np[1] = leds[(i+1)%4] np[2] = leds[(i+2)%4] np[3] = leds[(i+3)%4] np.show() sleep(500) i=(i+1)%4

執行結果：

範例四、用迴圈改寫程式

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# Imports go at the top from microbit import * import neopixel np = neopixel.NeoPixel(pin16, 4) i = 0 leds=[(255,0,0), (0,255,0), (0,0,255), (255,255,255)] # Code in a 'while True:' loop repeats forever while True: for j in range(4): np[j] = leds[(i+j)%4] np.show() sleep(500) i=(i+1)%4

執行結果：

同範例三