我正在我的树莓派下面的python脚本:Python的树莓派GPIO错误
http://www.skpang.co.uk/dl/rfid.py
我修改剧本接近尾声访问GPIO引脚15和打开和关闭它。这是我在底部代码:
def example():
rfid = SL030()
fw = rfid.get_firmware()
print("RFID reader firmware:" + fw)
print()
GPIO.setmode(GPIO.BOARD)
GPIO.setup(15, GPIO.OUT)
GPIO.output(15,True)
while True:
rfid.wait_tag()
print("card present")
if rfid.select_mifare():
type = rfid.get_type()
print("type:" + rfid.get_typename(type))
id = rfid.get_uidstr()
try:
user = cards[id]
print(user)
#os.system("aplay " + user)
except KeyError:
print("Unknown card:" + id)
rfid.wait_notag()
print("card removed")
print()
问题我现在面临的是,虽然它的运作销15,脚本会出现以下错误:
Traceback (most recent call last):
File "./rfid.py", line 212, in <module>
example()
File "./rfid.py", line 182, in example
rfid.wait_tag()
File "./rfid.py", line 45, in wait_tag
while not self.tag_present():
File "./rfid.py", line 40, in tag_present
return GPIO.input(CFG_TAG_DETECT) == False
RPi.GPIO.InvalidChannelException: The channel sent is invalid on a Raspberry Pi
任何想法可能是错误的?
由于
UPDATE
如果我把GPIO代码略低于DEF例子():与RFID上述= SL030()之类的下方,然后它似乎没有错误工作:
def example():
GPIO.setmode(GPIO.BOARD)
GPIO.setup(15, GPIO.OUT)
GPIO.output(15,True)
rfid = SL030()
* 更新 - 解 *
由于安德烈,我改变:
GPIO.setmode(GPIO.BOARD)
到: GPIO.setmode(GPIO.BCM)
,然后改变该端口以匹配BCM端口这样的:
GPIO.setup(22, GPIO.OUT)
GPIO.output(22,True)
任何帮助任何人吗? – John