使用micropython编写max7219模块的控制程序行列互换

以下是使用micropython编写的max7219模块的控制程序，行列互换：

from machine import Pin, SPI
import time

spi = SPI(1, baudrate=10000000, polarity=0, phase=0)
ss = Pin(15, Pin.OUT)

def send_byte(addr, data):
    ss.value(0)
    spi.write(bytearray([addr, data]))
    ss.value(1)

def init():
    send_byte(0x09, 0x00)  # decode mode off
    send_byte(0x0a, 0x03)  # brightness
    send_byte(0x0b, 0x07)  # scan limit
    send_byte(0x0c, 0x01)  # power up
    send_byte(0x0f, 0x00)  # test mode off

def set_pixel(row, col, value):
    if row < 0 or row > 7 or col < 0 or col > 7:
        return
    if value:
        send_byte(row + 1, 1 << col)
    else:
        send_byte(row + 1, ~(1 << col))

def set_row(row, data):
    if row < 0 or row > 7:
        return
    send_byte(row + 1, data)

def set_col(col, data):
    if col < 0 or col > 7:
        return
    for i in range(8):
        set_pixel(i, col, (data >> i) & 1)

def transpose(matrix):
    return [[matrix[j][i] for j in range(len(matrix))] for i in range(len(matrix[0]))]

init()

# set all pixels to on
for row in range(8):
    for col in range(8):
        set_pixel(row, col, 1)

# wait for 1 second
time.sleep(1)

# set all pixels to off
for row in range(8):
    for col in range(8):
        set_pixel(row, col, 0)

# wait for 1 second
time.sleep(1)

# set rows and columns in a checkerboard pattern
for i in range(8):
    if i % 2 == 0:
        set_row(i, 0x55)
        set_col(i, 0xaa)
    else:
        set_row(i, 0xaa)
        set_col(i, 0x55)

# wait for 1 second
time.sleep(1)

# transpose the matrix and display it
matrix = [[0, 1, 0, 1, 0, 1, 0, 1],
          [1, 0, 1, 0, 1, 0, 1, 0],
          [0, 1, 0, 1, 0, 1, 0, 1],
          [1, 0, 1, 0, 1, 0, 1, 0],
          [0, 1, 0, 1, 0, 1, 0, 1],
          [1, 0, 1, 0, 1, 0, 1, 0],
          [0, 1, 0, 1, 0, 1, 0, 1],
          [1, 0, 1, 0, 1, 0, 1, 0]]

matrix = transpose(matrix)

for row in range(8):
    for col in range(8):
        set_pixel(row, col, matrix[row][col])

# wait for 1 second
time.sleep(1)

# set all pixels to on
for row in range(8):
    for col in range(8):
        set_pixel(row, col, 1)

# wait for 1 second
time.sleep(1)

# set all pixels to off
for row in range(8):
    for col in range(8):
        set_pixel(row, col, 0)
``