71 lines
2.0 KiB
Python
71 lines
2.0 KiB
Python
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import wiringpi
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import time
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# LED灯的数量
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LED_N = 8
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# GPIO针脚，确保这是能够输出PWM信号的针脚，比如18
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GPIO_PIN = 12
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# 初始化WiringPi
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wiringpi.wiringPiSetupGpio()
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wiringpi.pinMode(GPIO_PIN, wiringpi.OUTPUT)
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# 发送单个bit
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def sendBit(value, isLastBit=False):
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HIGH_TIME_NS = 300 # 高电平时间，约为0.3us (300ns)，可能需要根据实际情况调整
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LOW_TIME_NS = 900 # 低电平时间，约为0.9us (900ns)，适用于大约1/3的时间为高电平的情况
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HALF_PERIOD_NS = HIGH_TIME_NS + LOW_TIME_NS
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if value:
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wiringpi.digitalWrite(GPIO_PIN, 1)
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time.sleep(HIGH_TIME_NS / 1000000)
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else:
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wiringpi.digitalWrite(GPIO_PIN, 0)
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time.sleep(HIGH_TIME_NS / 1000000)
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wiringpi.digitalWrite(GPIO_PIN, 0)
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if not isLastBit:
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time.sleep(LOW_TIME_NS / 1000000)
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# 发送颜色到指定的LED
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def sendColor(r, g, b):
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for _ in range(3):
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sendBit(True) # 开始位
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sendByte(r)
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sendByte(g)
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sendByte(b)
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for _ in range(2):
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sendBit(True) # 结束位
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def sendByte(value):
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for bit in range(8):
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sendBit((value >> (7 - bit)) & 1)
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def refreshLEDs():
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for led in range(LED_N):
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sendColor(0, 0, 0) # 先熄灭所有LED
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time.sleep(50/1000000) # 留一些时间间隔
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for led in range(LED_N):
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# 这里简化为只用红色演示，可根据需要修改为其他颜色
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sendColor(171, 31, 120) # 浅蓝色，亮度调低
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def chaseColor():
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global LED_N
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count = 0
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while True:
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count = (count + 1) % LED_N
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for i in range(LED_N):
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if i == count:
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sendColor(171, 31, 120) # 当前LED亮浅蓝色
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else:
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sendColor(0, 0, 0) # 其他LED熄灭
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time.sleep(0.1) # 等待一段时间再改变下一个LED
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try:
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chaseColor()
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except KeyboardInterrupt:
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print("程序中断，清理工作...")
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finally:
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wiringpi.digitalWrite(GPIO_PIN, 0) # 清理工作，确保GPIO输出为0
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wiringpi.pinMode(GPIO_PIN, wiringpi.INPUT)
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