pi_i2c_nano_neomatrix_ex4.py

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# coding: utf-8
from PIL import Image
import smbus
import time
 
off_x=28
off_y=130
dx=8
dy=2
 
imax=75
jmax=16
 
img = Image.open("ex1.png")
 
i2c = smbus.SMBus(1) # 注:ラズパイのI2Cポート
#
# command:
#   clear... 0x00
#   show ... 0x01
#   set1 ix,iy,r,g,b
#         ... 0x02  *,*,  *,*,*
#   setn ix,iy,n, r0,g0,b0, ..r(n-1),g(n-1),b(n-1)   n<=8
#         ... 0x03 *,*, *, *,*,*, ..., *,*,*
#
pixels=[[(0,0,0) for j in range(jmax)] for i in range(imax)]
          
addrs = [0x30,0x31]
fourpix=[0x00, 0x00, 0x04, 0,0,0, 0,0,0, 0,0,0, 0,0,0]
for i in range(imax):
    for j in range(jmax):
        x=off_x+(j-1)*dx
        y=off_y+(i-1)*dy
        rgb=img.getpixel((x,y))
        pixels[i][j]=rgb
 
i2c.write_byte(0x30,0x00)
i2c.write_byte(0x31,0x00)
for i in range(imax):
  for j in range(2):
    for k in range(4):
      p=pixels[i][4*j+k]
      fourpix[3+k*3+0]=p[0]
      fourpix[3+k*3+1]=p[1]
      fourpix[3+k*3+2]=p[2]
    fourpix[0]=i;
    fourpix[1]=0;
    i2c_addr=addrs[j]
    i2c.write_i2c_block_data(i2c_addr,0x03,fourpix)
  time.sleep(0.005)
i2c.write_byte(addrs[0],0x01)
i2c.write_byte(addrs[1],0x01)