Raspberry Pi button interrupt realizes camera photo

Install the Picamera module first using the Python interrupt function add_event_detect and define the callback function Call_back ().

• Add_event_detect (channel, GPIO.) RISING, Callback=test_callback, bouncetime=200)
• Rising edge detection, associated callbacks, bouncetime for keypad software stabilization

Calling the Picamera method

def catpure_img():    camera = PiCamera()    camera.resolution = (1024,768)    camera.start_preview() #预览2秒    # Camera warm-up time 2s,beacause it need 2‘s to ***    GPIO.output(22,GPIO.HIGH)     sleep(2)    camera.capture(‘img_catpure/two.jpg‘) #捕捉图片    camera.stop_preview() # 关闭预览    camera.close() #要关闭，不然第二次中断响应会报错    GPIO.output(22, GPIO.LOW)

Total generation?

#!coding:utf-8from Time Import sleepfrom picamera import picameraimport rpi.gpio as Gpiobtnpin = 11Gpin = 12Rpin = 13d EF catpure_img (): Camera = Picamera () camera.resolution = (1024,768) camera.start_preview () # Camera warm-up T IME 2s,beacause It need 2 ' to * * * gpio.output (22,gpio. High) Sleep (2) camera.capture (' img_catpure/two.jpg ') Camera.stop_preview () Camera.close () Gpio.output (G PIO. Low) def setup (): Gpio.setmode (GPIO). BOARD) # Numbers GPIOs by physical location Gpio.setup (Gpin, GPIO. # Set Green Led Pin mode to Output Gpio.setup (Rpin, GPIO). # Set Red Led Pin mode to Output Gpio.setup (GPIO). Out) Gpio.setup (Btnpin, GPIO. In, Pull_up_down=gpio. PUD_UP) # Set Btnpin ' s mode is input, and the pull-up-to-level (3.3V) Gpio.add_event_detect (Btnpin, GPIO.        BOTH, Callback=detect, bouncetime=200) def Led (x): if x = = 0:gpio.output (Rpin, 1) gpio.output (gpin, 0)      Catpure_img () if x = = 1:  Gpio.output (Rpin, 0) gpio.output (gpin, 1) def Print (x): if x = = 0:print (' *********************** ')   Print (' * Button pressed!  * ') print (' *********************** ') def Detect (CHN): Led (Gpio.input (Btnpin)) print (Gpio.input (btnpin)) def Loop (): While True:passdef destroy (): Gpio.output (Gpin, GPIO. High) # Green led off Gpio.output (Rpin, GPIO.  High) # Red led off Gpio.cleanup () # Release Resourceif __name__ = = ' __main__ ': # program Start from here Setup () Try:loop () except Keyboardinterrupt: # when ' CTRL + C ' is pressed, the child prog        Ram destroy () would be executed. Destroy ()

Raspberry Pi button interrupt for camera capture