Python实现数码显示屏
时间: 2024-05-16 14:10:00 浏览: 11
数码显示屏是一种数字显示装置,它可以用来显示数字、字母、符号等信息。Python可以通过GPIO库控制树莓派的GPIO引脚来实现数码管的控制。下面是一个简单的示例代码:
```python
import RPi.GPIO as GPIO
import time
# 定义数码管各个段的GPIO引脚
LED_A = 17
LED_B = 18
LED_C = 27
LED_D = 22
LED_E = 23
LED_F = 24
LED_G = 25
LED_DP = 12
# 定义数字对应的各个段的状态
NUMS = {
'0': [LED_A, LED_B, LED_C, LED_D, LED_E, LED_F],
'1': [LED_B, LED_C],
'2': [LED_A, LED_B, LED_D, LED_E, LED_G],
'3': [LED_A, LED_B, LED_C, LED_D, LED_G],
'4': [LED_B, LED_C, LED_F, LED_G],
'5': [LED_A, LED_C, LED_D, LED_F, LED_G],
'6': [LED_A, LED_C, LED_D, LED_E, LED_F, LED_G],
'7': [LED_A, LED_B, LED_C],
'8': [LED_A, LED_B, LED_C, LED_D, LED_E, LED_F, LED_G],
'9': [LED_A, LED_B, LED_C, LED_D, LED_F, LED_G]
}
# 初始化GPIO引脚状态
def init():
GPIO.setmode(GPIO.BCM)
GPIO.setup(LED_A, GPIO.OUT)
GPIO.setup(LED_B, GPIO.OUT)
GPIO.setup(LED_C, GPIO.OUT)
GPIO.setup(LED_D, GPIO.OUT)
GPIO.setup(LED_E, GPIO.OUT)
GPIO.setup(LED_F, GPIO.OUT)
GPIO.setup(LED_G, GPIO.OUT)
GPIO.setup(LED_DP, GPIO.OUT)
# 显示数字
def display(num):
for pin in NUMS[num]:
GPIO.output(pin, GPIO.HIGH)
time.sleep(1)
for pin in NUMS[num]:
GPIO.output(pin, GPIO.LOW)
# 主函数
if __name__ == '__main__':
init()
while True:
for num in NUMS:
display(num)
```
该代码通过GPIO库初始化引脚状态,并定义了数字对应的各个段的状态,最后通过循环控制数码管显示各个数字。你也可以根据具体的需求进行修改。
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