写一个检测按键单双击的函数
时间: 2024-05-01 08:16:42 浏览: 36
以下是一个检测按键单双击的函数的例子:
```python
import time
def check_click(button_pin):
"""Check if button was single or double clicked."""
click_count = 0
last_click_time = 0
while True:
# check button state
button_state = read_button(button_pin)
# check if button is pressed
if button_state == "pressed":
# measure time since last click
click_time = time.monotonic()
time_since_last_click = click_time - last_click_time
# check if time between clicks is within double click range
if time_since_last_click < 0.5:
click_count += 1
else:
click_count = 1
# update last click time
last_click_time = click_time
# check if button was double clicked
if click_count == 2:
return "double_click"
# check if button was released
if button_state == "released":
# check if button was single clicked
if click_count == 1:
return "single_click"
# reset click count
click_count = 0
last_click_time = 0
# wait a short time before checking button again
time.sleep(0.01)
```
这个函数使用了一个 `while` 循环来不断检测按键状态。当按键被按下时,它会记录按下的时间,并与上次按下时间比较,以判断是单击还是双击。如果两次点击之间的时间小于 0.5 秒,则被视为双击。如果按键被释放,则检查点击次数以确定是单击还是双击。函数返回值为 "single_click" 或 "double_click"。