【RPi PICO】Use SPI to drive WS2812

dcexpert

【RPi PICO】Use SPI to drive WS2812 [Copy link]

 

 

In addition to using PIO, you can also use SPI to drive WS2812. The usage is as follows:

First copy the following program to the development board:

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Then, you can drive WS2812. The usage is similar to that on ESP32.

from machine import SPI, Pin
from neopixel import NeoPixel
 
spi_sck=Pin(2)
spi_tx=Pin(3)
spi_rx=Pin(4)
 
spi = SPI(0, sck=spi_sck, mosi=spi_tx, miso=spi_rx)
 
np = NeoPixel(spi, 8)
for i in range(8):
    np = (0,i*4,  0)
np.show()

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zxy2266

Just bought PICO, let's study PYTHON

zxy2266

I just bought a board and I don't know how to use it. How do I copy the file to the board? What is the file name? I'm new to python. Please give me some guidance. I can't even light up 1602 today. How can I install the library on the board without guidance?

dcexpert

zxy2266 posted on 2021-5-11 22:50 I just bought a board and I don’t know how to use it. How do I copy the file to the board? What is the file name? I’m a novice, don’t laugh at me. I’m new to python, please give me more guidance, ...

Refer to previous posts:

https://bbs.eeworld.com.cn/thread-1156336-1-1.html

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WS2812.py: undefined name 'buf_bytes'
WS2812.py: undefined name 'buf_bytes'
WS2812.py: undefined name 'buf_bytes'
WS2812.py: undefined name 'buf_bytes'

This paragraph will report an error

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• np = NeoPixel(spi, 8)
• for i in range(8):
  • np = (0,i*4, 0)
• np.show()
• -------------------
• There is also a syntax error here. After executing np = (0,i*4, 0), np no longer inherits the NeoPixel class and the show method cannot be called.

dcexpert

Sports Hall published on 2021-8-26 17:38 np = NeoPixel(spi, 8) for i in range(8): np = (0,i*4, 0) np.show() ----------- ...

np = (0,i*4, 0)

This usage is incorrect. You can use

for i in range(8):

np = (10,0,0)

dcexpert

Sports Hall published on 2021-8-26 14:48 WS2812.py: undefined name 'buf_bytes' WS2812.py: undefined name 'buf_bytes' WS2812 ...

Need to post it in full

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