Raspberry pi 树莓皮皮皮射频识别rc522（微型蟒蛇）
我想使用我的RPi Pico从mfrc522（Iduino RFID-rc522）读卡器读取数据，但我不知道如何读取。我试图使用为此目的而设计的mfrc522.py MicroPython库。读卡器通过SPI与Pi通信，我将其连接到SPI0。 pi上的代码：Raspberry pi 树莓皮皮皮射频识别rc522（微型蟒蛇）,raspberry-pi,rfid,spi,micropython,Raspberry Pi,Rfid,Spi,Micropython,我想使用我的RPi Pico从mfrc522（Iduino RFID-rc522）读卡器读取数据，但我不知道如何读取。我试图使用为此目的而设计的mfrc522.py MicroPython库。读卡器通过SPI与Pi通信，我将其连接到SPI0。 pi上的代码： import time from machine import I2C, Pin, SPI from mfrc522 import MFRC522 sck = Pin(6, Pin.OUT) mosi = Pin(7, Pin.
import time
from machine import I2C, Pin, SPI
from mfrc522 import MFRC522
sck = Pin(6, Pin.OUT)
mosi = Pin(7, Pin.OUT)
miso = Pin(4, Pin.OUT)
spi = SPI(0, baudrate=100000, polarity=0, phase=0, sck=sck, mosi=mosi, miso=miso)
sda = Pin(5, Pin.OUT)
rst = Pin(22, Pin.OUT)
while True:
rdr = MFRC522(spi, sda, rst)
uid = ""
(stat, tag_type) = rdr.request(rdr.REQIDL)
if stat == rdr.OK:
(stat, raw_uid) = rdr.anticoll()
if stat == rdr.OK:
uid = ("0x%02x%02x%02x%02x" % (raw_uid[0], raw_uid[1], raw_uid[2], raw_uid[3]))
print(uid)
from machine import Pin, SPI
from os import uname
class MFRC522:
OK = 0
NOTAGERR = 1
ERR = 2
REQIDL = 0x26
REQALL = 0x52
AUTHENT1A = 0x60
AUTHENT1B = 0x61
def __init__(self, spi, cs, rst):
self.spi = spi
self.cs = cs
self.rst = rst
self.rst.value(0)
self.cs.value(1)
self.spi.init()
self.rst.value(1)
self.init()
def _wreg(self, reg, val):
self.cs.value(0)
self.spi.write(b'%c' % int(0xff & ((reg << 1) & 0x7e)))
self.spi.write(b'%c' % int(0xff & val))
self.cs.value(1)
def _rreg(self, reg):
self.cs.value(0)
self.spi.write(b'%c' % int(0xff & (((reg << 1) & 0x7e) | 0x80)))
val = self.spi.read(1)
self.cs.value(1)
return val[0]
def _sflags(self, reg, mask):
self._wreg(reg, self._rreg(reg) | mask)
def _cflags(self, reg, mask):
self._wreg(reg, self._rreg(reg) & (~mask))
def _tocard(self, cmd, send):
recv = []
bits = irq_en = wait_irq = n = 0
stat = self.ERR
if cmd == 0x0E:
irq_en = 0x12
wait_irq = 0x10
elif cmd == 0x0C:
irq_en = 0x77
wait_irq = 0x30
self._wreg(0x02, irq_en | 0x80)
self._cflags(0x04, 0x80)
self._sflags(0x0A, 0x80)
self._wreg(0x01, 0x00)
for c in send:
self._wreg(0x09, c)
self._wreg(0x01, cmd)
if cmd == 0x0C:
self._sflags(0x0D, 0x80)
i = 2000
while True:
n = self._rreg(0x04)
i -= 1
if ~((i != 0) and ~(n & 0x01) and ~(n & wait_irq)):
break
self._cflags(0x0D, 0x80)
if i:
if (self._rreg(0x06) & 0x1B) == 0x00:
stat = self.OK
if n & irq_en & 0x01:
stat = self.NOTAGERR
elif cmd == 0x0C:
n = self._rreg(0x0A)
lbits = self._rreg(0x0C) & 0x07
if lbits != 0:
bits = (n - 1) * 8 + lbits
else:
bits = n * 8
if n == 0:
n = 1
elif n > 16:
n = 16
for _ in range(n):
recv.append(self._rreg(0x09))
else:
stat = self.ERR
return stat, recv, bits
def _crc(self, data):
self._cflags(0x05, 0x04)
self._sflags(0x0A, 0x80)
for c in data:
self._wreg(0x09, c)
self._wreg(0x01, 0x03)
i = 0xFF
while True:
n = self._rreg(0x05)
i -= 1
if not ((i != 0) and not (n & 0x04)):
break
return [self._rreg(0x22), self._rreg(0x21)]
def init(self):
self.reset()
self._wreg(0x2A, 0x8D)
self._wreg(0x2B, 0x3E)
self._wreg(0x2D, 30)
self._wreg(0x2C, 0)
self._wreg(0x15, 0x40)
self._wreg(0x11, 0x3D)
self.antenna_on()
def reset(self):
self._wreg(0x01, 0x0F)
def antenna_on(self, on=True):
if on and ~(self._rreg(0x14) & 0x03):
self._sflags(0x14, 0x03)
else:
self._cflags(0x14, 0x03)
def request(self, mode):
self._wreg(0x0D, 0x07)
(stat, recv, bits) = self._tocard(0x0C, [mode])
if (stat != self.OK) | (bits != 0x10):
stat = self.ERR
return stat, bits
def anticoll(self):
ser_chk = 0
ser = [0x93, 0x20]
self._wreg(0x0D, 0x00)
(stat, recv, bits) = self._tocard(0x0C, ser)
if stat == self.OK:
if len(recv) == 5:
for i in range(4):
ser_chk = ser_chk ^ recv[i]
if ser_chk != recv[4]:
stat = self.ERR
else:
stat = self.ERR
return stat, recv
def select_tag(self, ser):
buf = [0x93, 0x70] + ser[:5]
buf += self._crc(buf)
(stat, recv, bits) = self._tocard(0x0C, buf)
return self.OK if (stat == self.OK) and (bits == 0x18) else self.ERR
def auth(self, mode, addr, sect, ser):
return self._tocard(0x0E, [mode, addr] + sect + ser[:4])[0]
def stop_crypto1(self):
self._cflags(0x08, 0x08)
def read(self, addr):
data = [0x30, addr]
data += self._crc(data)
(stat, recv, _) = self._tocard(0x0C, data)
return recv if stat == self.OK else None
def write(self, addr, data):
buf = [0xA0, addr]
buf += self._crc(buf)
(stat, recv, bits) = self._tocard(0x0C, buf)
if not (stat == self.OK) or not (bits == 4) or not ((recv[0] & 0x0F) == 0x0A):
stat = self.ERR
else:
buf = []
for i in range(16):
buf.append(data[i])
buf += self._crc(buf)
(stat, recv, bits) = self._tocard(0x0C, buf)
if not (stat == self.OK) or not (bits == 4) or not ((recv[0] & 0x0F) == 0x0A):
stat = self.ERR
return stat
来自机器导入Pin，SPI
从操作系统导入uname
MFRC522类：
OK=0
notager=1
误差=2
REQIDL=0x26
REQALL=0x52
AUTHENT1A=0x60
AUTHENT1B=0x61
定义初始化（自我、spi、cs、rst）：
self.spi=spi
self.cs=cs
self.rst=rst
自身初始值（0）
自我约束值（1）
self.spi.init（）
自身初始值（1）
self.init（）
def_wreg（自身、注册、val）：
自我控制值（0）
self.spi.write（b'%c'%int（0xff&）（（regmiso是pico的输入。尝试将miso引脚分配更改为miso=pin（4，pin.IN，pin.PULL_DOWN）在处理了这个问题并发布了一个被删除的无用答案后，我终于成功地让它工作了。请看一下上的这个帖子，特别是上面提到的来自danjperron的帖子
我将代码复制到我的Pico中，并将示例/Pico_read.py第11行中的pin码更改为reader=MFRC522（spi_id=0，sck=6，miso=4，mosi=7，cs=5，rst=22）
以匹配您使用的PIN。如果有效，它将打印出类似于检测到的卡0C9B5023
的内容。首先，我确实看到您的PIN声明中存在问题。您将所有PIN定义为输出。您不需要这样做。请参见此处的示例：您解决了这个问题吗？