Hello

Ones again I need Your advice for steering RGB LED APA106.

I try to search for any program to control this Led but most of them is for RPI and it`s not work for My OPI.

 

Is this connection for DIN should by for any SPI1?:

 

Do You have idea how to for example set change color of led ?

 

Regards

 

 

 

1 hour ago, djmcg said:

Do You have idea how to for example set change color of led ?

You need some NeoPixel library ...

Here are some info extracted from https://gist.github.com/probonopd/97f6826cc5aa3c0c0950682b0bc266bc

WS2812B Neopixels driven by Python

Connect the data line of the WS2812B Neopixels to pin SPI1_MOSI/PA15. In /boot/armbianEnv.txt we need:

overlays=spi-spidev
param_spidev_spi_bus=1
param_spidev_max_freq=100000000

We can successfully compile the needed Python libraries on the device itself:

git clone https://github.com/doceme/py-spidev.git
cd py-spidev
make -j4
make install
cd ..
git clone https://github.com/joosteto/ws2812-spi.git
find ws2812-spi/ -type f -name '*.py' -exec sed -i -e 's|spi.open(0,0)|spi.open(1,0)|g' {} \;
find ws2812-spi/ -type f -name '*.py' -exec sed -i -e 's|tx=\[\]|tx=\[0x00\]|g' {} \;

Make sure to use spi.open(1,0); we need to use SPI bus 1 since the internal SPI Flash is connected to SPI bus 0.

# Make 16 LEDs red
./ws2812-spi/ws2812.py -c "[[0,255,0]]" -n 16

# Make 16 LEDs white
./ws2812-spi/ws2812.py -c "[[255,255,255]]" -n 16

# Switch 16 LEDs off
./ws2812-spi/ws2812.py -c "[[0,0,0]]" -n 16

 

Hello thank for reply:

16 hours ago, martinayotte said:

Connect the data line of the WS2812B Neopixels to pin SPI1_MOSI/PA15

I Have the OPI WIN not Zero so I connect to SPI1_MOSI/PD2 hope it`s good.

 

Next I edit the /boot/armbianEnv.txt file like below :

and saved.

Next steps like You wrote please check:

Unfortunately I have error:

 

Could You advice what I`m doing wrong?

 

 

 

4 hours ago, djmcg said:

Could You advice what I`m doing wrong?

It seems not finding the /dev/spi1.0 ...

Did you rebooted after having edited the /boot/armbianEnv.txt to add the overlay ?

Yes I`m reboot after save

What You mean "overlay"

Just now, djmcg said:

What You mean "overlay"

This is loading an overlay :

overlays=spi-spidev
param_spidev_spi_bus=1

It should make /dev/spi1.0 appearing ...

 

Which Armbian image are you using ?

 

The system image: https://dl.armbian.com/_old/orangepiwin/archive/Armbian_19.11.4_Orangepiwin_bionic_current_5.3.13_desktop.img.gz

Now I have problem with connection to internet

Dou you see the /dev/spi1.0 ?

I have "spidev1.0"

Hello

I just reinstall Armbian and RGB led start work

However after update

sudo apt install python-numpy

My LED colors is change now off is red and other colors is diffrent

Could You advice why?

?

 

 

 

I just uninstall python-numpy an color back to normal.

 

I would like to wrote some short code for change colors in python

Could You advice how to implement this

commands for code

On 12/31/2019 at 6:13 PM, martinayotte said:

# Make 16 LEDs red ./ws2812-spi/ws2812.py -c "[[0,255,0]]" -n 16 # Make 16 LEDs white ./ws2812-spi/ws2812.py -c "[[255,255,255]]" -n 16 # Switch 16 LEDs off ./ws2812-spi/ws2812.py -c "[[0,0,0]]" -n 16

 

1 hour ago, djmcg said:

Could You advice how to implement this

commands for code

What do you mean ?

Do you mean alternating colors within the same script ?

Simply add sleep command between each calls to ws2812.py ...

13 hours ago, martinayotte said:

What do you mean ?

Do you mean alternating colors within the same script ?

Simply add sleep command between each calls to ws2812.py ...

Yes I know how to generate colors

But won`t work

I don`t know where to paste this script of different colors.

 

4 hours ago, djmcg said:

But won`t work

You seems to add calls within the script itself, which is bad technique, resulting to such python error ...

Leave the script unmodified and use a bash script as the master script such as :

 

#!/bin/bash

while true; do
	./ws2812-spi/ws2812.py -c "[[255,0,0]]" -n 16
	sleep 0.5
	./ws2812-spi/ws2812.py -c "[[0,255,0]]" -n 16
	sleep 0.5
	./ws2812-spi/ws2812.py -c "[[0,0,255]]" -n 16
	sleep 0.5
done

 

I`m really need update script in Python

 

Do You have idea how to update this script for example to kept the same effect what You wrote ?

 

 

1 hour ago, djmcg said:

I`m really need update script in Python

 

Do You have idea how to update this script for example to kept the same effect what You wrote ?

Then delete all those lines :

    if color!=None:
        write2812(spi, eval(color)*nLED)
    elif doTest:
        test_fixed(spi, nLED)
    else:
        usage()

and add those ones :

    while 1:
        write2812(spi, [[255,0,0])
        time.sleep(0.5)	
        write2812(spi, [[0,255,0])
        time.sleep(0.5)	
        write2812(spi, [[0,0,255])
        time.sleep(0.5)	

Be careful about indentation, python is strict about line alignements ...

I paste the code what You wrote and perform some updates

 

Unfortunately it`s not work

However

I make some short script like You mentioned before and it`s work but it`s something wrong the RGB LED sometime when should be "off" [(black) (0,0,0)] sometimes shines as RED.

 

 

 

 

5 minutes ago, djmcg said:

Unfortunately it`s not work

You use parenthesis instead of brackets !!!

It should be "write2812(spi, [[0,0,255]])" instead of "write2812(spi, (0,0,255))"

Update, something work but colors is different that should be

 

back to you first script please check the video the colors is diifren than code (RED is note in Code)

 

 

 

 

Maybe due to the fact that you didn't provide color inside quotes ...

Try something like :

Green = "/root/Downloads/ws2812-spi/ws2812.py -c \"[[0,255,0]]\" -n 1"

 

Update code

But nothing chnage 

(however i just lern how to use "" twice   Thanks (\" did`t know\" )

import os
import time

White = "/root/Downloads/ws2812-spi/ws2812.py -c \"[[255,255,255]]\" -n 1"
Green = "/root/Downloads/ws2812-spi/ws2812.py -c \"[[0,255,0]]\" -n 1"
Blue =  "/root/Downloads/ws2812-spi/ws2812.py -c \"[[0,0,255]]\" -n 1"
Red = 	"/root/Downloads/ws2812-spi/ws2812.py -c \"[[255,0,0]]\" -n 1"
Off = 	"/root/Downloads/ws2812-spi/ws2812.py -c \"[[0,0,0]]\" -n 1"
y = 0.5

while True:
	
	os.system(White)
	print("white")
	time.sleep(y)
	os.system(Off)
	print("sleep")
	time.sleep(y)
	
	os.system(Blue)
	time.sleep(y)
	os.system(Off)
	time.sleep(y)
	
	os.system(Green)
	time.sleep(y)
	os.system(Off)
	time.sleep(y)

 

38 minutes ago, djmcg said:

But nothing chnage

But what are the color discripancies ?

White is white, right ?

Maybe bytes are swapped, for example, is red become blue ?

I`m observe that often [0,0,0] (turnoff) is RED.

 

3 hours ago, djmcg said:

I`m observe that often [0,0,0] (turnoff) is RED.

If you only send [0,0,0] frequently, does it becomes RED sometimes ?

If Yes, maybe it is SPI speed issue ...

20 hours ago, martinayotte said:

If you only send [0,0,0] frequently, does it becomes RED sometimes ?

 

Yes.

It`s any possible to rework that? any resistor help?

1 hour ago, djmcg said:

It`s any possible to rework that?

I don't know, maybe by lowering the SPI speed ...

Try to change those lines, replacing the 1.05 by 5.05 :

    #print [hex(v) for v in tx]
    spi.xfer(tx, int(4/1.05e-6))

1 hour ago, djmcg said:

any resistor help?

Issue has nothing to do with resistor ...