from machine import Pin, SoftSPI
from max7219 import Max7219
import time

print("=" * 40)
print("MAX7219 双屏滚动显示")
print("上方: hello  下方: world")
print("=" * 40)

# ========== 硬件初始化 ==========

# 上方矩阵 (matrix2) - 显示 "hello"
# CLK: GPIO12, DIN: GPIO11, CS: GPIO10
spi_top = SoftSPI(
    baudrate=10000000,
    polarity=0,
    phase=0,
    sck=Pin(12),
    mosi=Pin(11),
    miso=Pin(13)  # 不使用，但需要指定
)
display_top = Max7219(32, 8, spi_top, Pin(10))

# 下方矩阵 (matrix1) - 显示 "world"
# CLK: GPIO6, DIN: GPIO7, CS: GPIO5
spi_bottom = SoftSPI(
    baudrate=10000000,
    polarity=0,
    phase=0,
    sck=Pin(6),
    mosi=Pin(7),
    miso=Pin(8)  # 不使用，但需要指定
)
display_bottom = Max7219(32, 8, spi_bottom, Pin(5))

# 设置亮度 (0-15)
display_top.brightness(7)
display_bottom.brightness(7)

# ========== 显示配置 ==========

text_top = "hello"
text_bottom = "world"

# 滚动速度 (毫秒，越小越快)
SCROLL_DELAY = 60

# 字符宽度 (framebuf内置8x8字体)
CHAR_WIDTH = 8

# 屏幕宽度
SCREEN_WIDTH = 32

# ========== 启动动画 ==========

print("启动动画...")

# 全亮测试
display_top.fill(1)
display_bottom.fill(1)
display_top.show()
display_bottom.show()
time.sleep_ms(300)

# 清空
display_top.fill(0)
display_bottom.fill(0)
display_top.show()
display_bottom.show()
time.sleep_ms(200)

# ========== 滚动显示函数 ==========

def scroll_text(text_top, text_bottom, delay_ms):
    """同步滚动两行文字"""
    
    # 计算最长文字的像素宽度
    width_top = len(text_top) * CHAR_WIDTH
    width_bottom = len(text_bottom) * CHAR_WIDTH
    max_width = max(width_top, width_bottom)
    
    # 从右侧滚入，到左侧完全滚出
    # 起始: x = SCREEN_WIDTH (文字在屏幕右侧外)
    # 结束: x = -max_width (文字完全离开左侧)
    
    for x in range(SCREEN_WIDTH, -max_width - 1, -1):
        # 清除显示缓冲区
        display_top.fill(0)
        display_bottom.fill(0)
        
        # 绘制文字 (text方法: string, x, y, color)
        display_top.text(text_top, x, 0, 1)
        display_bottom.text(text_bottom, x, 0, 1)
        
        # 更新到LED矩阵
        display_top.show()
        display_bottom.show()
        
        # 控制滚动速度
        time.sleep_ms(delay_ms)

# ========== 主循环 ==========

print("开始滚动显示...")
print(f"  上方矩阵: '{text_top}'")
print(f"  下方矩阵: '{text_bottom}'")
print("-" * 40)

loop_count = 0

while True:
    loop_count += 1
    print(f"循环 #{loop_count}")
    
    # 执行滚动
    scroll_text(text_top, text_bottom, SCROLL_DELAY)
    
    # 循环间隔 (可选)
    time.sleep_ms(500)