from machine import Pin,I2C
import time
import json
import matrix_fonts
from ht16k33_matrix import ht16k33_matrix
#制作点阵图像的工具 https://gurgleapps.com/tools/matrix
#i2c配置
clock_pin = 21
data_pin = 20
bus = 0
i2c_addr_left = 0x70
use_i2c = True

def scan_for_devices():
    i2c = machine.I2C(bus,sda=machine.Pin(data_pin),scl=machine.Pin(clock_pin))
    devices = i2c.scan()
    if devices:
        for d in devices:
            print(hex(d))
    else:
        print('no i2c devices')

if use_i2c:
    scan_for_devices()
    left_eye = ht16k33_matrix(data_pin, clock_pin, bus, i2c_addr_left)

def show_char(left):
    if use_i2c:
        left_eye.show_char(left)
        
def scroll_message(font,message='hello',delay=0.05): #滚动显示
    left_message = '   ' + message
    right_message = message + '   '
    length=len(right_message)
    char_range=range(length-1)
    for char_pos in char_range:
      right_left_char=font[right_message[char_pos]]
      right_right_char=font[right_message[char_pos+1]]
      left_left_char=font[left_message[char_pos]]
      left_right_char=font[left_message[char_pos+1]]
      for shift in range(8):
        left_bytes=[0,0,0,0,0,0,0,0]
        right_bytes=[0,0,0,0,0,0,0,0]
        for col in range(8):
          left_bytes[col]=left_bytes[col]|left_left_char[col]<<shift
          left_bytes[col]=left_bytes[col]|left_right_char[col]>>8-shift;
          right_bytes[col]=right_bytes[col]|right_left_char[col]<<shift
          right_bytes[col]=right_bytes[col]|right_right_char[col]>>8-shift;
        if use_i2c:
                left_eye.show_char(left_bytes)
        time.sleep(delay)


while True:
    show_char(matrix_fonts.textFont1['A']) #显示字母 A
    time.sleep(1)
    show_char(matrix_fonts.textFont1['B'])
    time.sleep(1)
    show_char(matrix_fonts.textFont1['C'])
    time.sleep(1)
    scroll_message(matrix_fonts.textFont1, ' Hello World ')