NeoPixel neo_16x16 to neo_10x10

[DHavron]

Hi!

Using your neo_16x16 code to customize neo_10x10 :
test.py

from machine import Pin
import time

from neo10x10 import neo10x10

np = neo10x10(Pin(5))

npdat=[
0x00, 0x66, 0x66, 0xe0, 0xe0, 0xe0, 0xe0, 0x66, 0x66, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
0x00, 0x00, 0x00, 0x00
] 

n = 0
while 1:
    np.show(npdat, n)
    n = (n-10)%10
    time.sleep_ms(100)

neo10x10.py

from machine import Pin
import neopixel

class neo10x10:
    def __init__(self, pin):
        self.np = neopixel.NeoPixel(pin, 100)
        self.color = (0,0,8)
    
    def clear(self):
        self.np.fill((0,0,0))
        self.np.write()

    def set(self, n, color=''):
        if color!='':
            self.np[n] = color
        else:
            self.np[n] = self.color
        self.np.write()

    def setcolor(self, color):
        self.color = color

    def show(self, dat, offset=0, clear = True, color=''):
        if color != '':
            self.color = color
        if clear:
            self.np.fill((0,0,0))
        num = 0
        for x in range(10):
            for y in range(10):
                if (x+offset)>=len(dat):
                    self.np[x*10+y]=(0,0,0)
                else:
                    if (1<<y)&dat[x+offset]:
                        if offset%2==0:
                            self.np[x*10 + y] = self.color
                        else:
                            self.np[x*10 + 9 - y] = self.color

        self.np.write()

trying to display an image smile
I get this output
what could be the problem?
tell me in which editor to convert the image into an array of data?

[shaoziyang]

In neo16x16, use 1bit for a ws2812 or one byte for 8 ws2812, so 10x10 matrix need 100/8=12.5 bytes. It is not an integer and will cause some trouble.

I suggest use neo16_x16_img, it use 4bit for one of ws2812 color (to save microbit memory), and and 10x10 matrix need 100*3=300 bytes.

And I have wrote a small program microbit_toolbox to convert images, it is for microbit but with few modify it will work for other device. Or delete redundant data after convert.