参考连接：https://doc.itprojects.cn/A0004.iot/01.doc.c0e19433a76e2e42f143ba0ded917201/index.html#/q02.rfid.01
１）ESP32S3+MFRC522射频卡模块图
# 接线说明
# MFRC522_sck = ESP32S3_Pin(14)
# MFRC522_mosi = ESP32S3_Pin(13)
# MFRC522_miso = ESP32S3_Pin(12)
# MFRC522_sda = ESP32S3_Pin(9) 片选信号
２）ESP32-S3资料
参考原文链接：https://blog.csdn.net/MJiarong_personal/article/details/121726585
乐鑫官网资料：https://www.espressif.com/sites/default/files/documentation/esp32-s3_datasheet_cn.pdf
注意：STRAP管脚不可以用。
3）编程
函数参考：https://docs.micropython.org/en/latest/esp32/quickref.html#software-spi-bus
mfrc522.py存放在ESP32-S3芯片内
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):
self.spi = spi
self.cs = cs
self.cs.value(1)
self.spi.init()
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
View Code
test.py代码可放在ESP32-S3芯片内，也可放在PC内仅供调试
from time import sleep_ms
from machine import Pin, SPI, SoftSPI
# 导入自定义模块
from mfrc522 import MFRC522
# 接线说明
# MFRC522_sck = ESP32S3_Pin(14)
# MFRC522_mosi = ESP32S3_Pin(13)
# MFRC522_miso = ESP32S3_Pin(12)
# MFRC522_sda = ESP32S3_Pin(9) 片选信号
# 创建SPI对象
spi = SPI(1, 10000000, polarity=0, phase=0, sck=Pin(14), mosi=Pin(13), miso=Pin(12))
# 片选信号的引脚是25
sda = Pin(9, Pin.OUT)
def read_id():
# 1. 创建RFID操作对象
rfid = MFRC522(spi, sda)
# 2. 循环读取数据
while True:
# 3. 复位应答
stat, tag_type = rfid.request(rfid.REQIDL)
print(stat)
print(tag_type)
if stat == rfid.OK:
# 4. 防冲突检测，提取id号
stat, raw_uid = rfid.anticoll()
if stat == rfid.OK:
_id = "0x%02x%02x%02x%02x" % (raw_uid[0], raw_uid[1], raw_uid[2], raw_uid[3])
print("rfid卡片的id:", _id)
sleep_ms(500)
if __name__ == "__main__":
read_id()
测试程序
测试结果图
标签：micropython,stat,Pin,self,MFRC522,ESP32S3,._,recv,def From： https://www.cnblogs.com/excellentHellen/p/18441613