My goal is to use dual RFID RC522 readers with Orange PI. So far, I have managed to make only one working. (reading google, armbian and orange pi forums). Here is what I have done so far:
Hardware connection:
Second reader uses shared pins, except SDA, it goes to pin 26 on orange PI
software:
Install python dev
apt-get install python-dev Install orangepi_PC_gpio_pyH3 Library
git clone https://github.com/duxingkei33/orangepi_PC_gpio_pyH3.git cd orangepi_PC_gpio_pyH3 python setup.py install Install SPI-Py Library
git clone https://github.com/lthiery/SPI-Py.git cd SPI-Py python setup.py install Install MFRC522-python
git clone https://github.com/rasplay/MFRC522-python.git The tricky part is, MFRC522-python is made to work with RASPBERRY PI on orange pi, one guy offered a solution by modifying MFRC522.py
#import RPi.GPIO as GPIO import pyA20.gpio as GPIO import spi import signal class MFRC522: NRSTPD = 22 MAX_LEN = 16 PCD_IDLE = 0x00 PCD_AUTHENT = 0x0E PCD_RECEIVE = 0x08 PCD_TRANSMIT = 0x04 PCD_TRANSCEIVE = 0x0C PCD_RESETPHASE = 0x0F PCD_CALCCRC = 0x03 PICC_REQIDL = 0x26 PICC_REQALL = 0x52 PICC_ANTICOLL = 0x93 PICC_SElECTTAG = 0x93 PICC_AUTHENT1A = 0x60 PICC_AUTHENT1B = 0x61 PICC_READ = 0x30 PICC_WRITE = 0xA0 PICC_DECREMENT = 0xC0 PICC_INCREMENT = 0xC1 PICC_RESTORE = 0xC2 PICC_TRANSFER = 0xB0 PICC_HALT = 0x50 MI_OK = 0 MI_NOTAGERR = 1 MI_ERR = 2 Reserved00 = 0x00 CommandReg = 0x01 CommIEnReg = 0x02 DivlEnReg = 0x03 CommIrqReg = 0x04 DivIrqReg = 0x05 ErrorReg = 0x06 Status1Reg = 0x07 Status2Reg = 0x08 FIFODataReg = 0x09 FIFOLevelReg = 0x0A WaterLevelReg = 0x0B ControlReg = 0x0C BitFramingReg = 0x0D CollReg = 0x0E Reserved01 = 0x0F Reserved10 = 0x10 ModeReg = 0x11 TxModeReg = 0x12 RxModeReg = 0x13 TxControlReg = 0x14 TxAutoReg = 0x15 TxSelReg = 0x16 RxSelReg = 0x17 RxThresholdReg = 0x18 DemodReg = 0x19 Reserved11 = 0x1A Reserved12 = 0x1B MifareReg = 0x1C Reserved13 = 0x1D Reserved14 = 0x1E SerialSpeedReg = 0x1F Reserved20 = 0x20 CRCResultRegM = 0x21 CRCResultRegL = 0x22 Reserved21 = 0x23 ModWidthReg = 0x24 Reserved22 = 0x25 RFCfgReg = 0x26 GsNReg = 0x27 CWGsPReg = 0x28 ModGsPReg = 0x29 TModeReg = 0x2A TPrescalerReg = 0x2B TReloadRegH = 0x2C TReloadRegL = 0x2D TCounterValueRegH = 0x2E TCounterValueRegL = 0x2F Reserved30 = 0x30 TestSel1Reg = 0x31 TestSel2Reg = 0x32 TestPinEnReg = 0x33 TestPinValueReg = 0x34 TestBusReg = 0x35 AutoTestReg = 0x36 VersionReg = 0x37 AnalogTestReg = 0x38 TestDAC1Reg = 0x39 TestDAC2Reg = 0x3A TestADCReg = 0x3B Reserved31 = 0x3C Reserved32 = 0x3D Reserved33 = 0x3E Reserved34 = 0x3F serNum = [] def __init__(self,spd=1000000): spi.openSPI(speed=spd) # GPIO.setmode(GPIO.BOARD) # GPIO.setup(22, GPIO.OUT) # GPIO.output(self.NRSTPD, 1) self.MFRC522_Init() def MFRC522_Reset(self): self.Write_MFRC522(self.CommandReg, self.PCD_RESETPHASE) def Write_MFRC522(self,addr,val): spi.transfer(((addr<<1)&0x7E,val)) def Read_MFRC522(self,addr): val = spi.transfer((((addr<<1)&0x7E) | 0x80,0)) return val[1] def SetBitMask(self, reg, mask): tmp = self.Read_MFRC522(reg) self.Write_MFRC522(reg, tmp | mask) def ClearBitMask(self, reg, mask): tmp = self.Read_MFRC522(reg); self.Write_MFRC522(reg, tmp & (~mask)) def AntennaOn(self): temp = self.Read_MFRC522(self.TxControlReg) if(~(temp & 0x03)): self.SetBitMask(self.TxControlReg, 0x03) def AntennaOff(self): self.ClearBitMask(self.TxControlReg, 0x03) def MFRC522_ToCard(self,command,sendData): backData = [] backLen = 0 status = self.MI_ERR irqEn = 0x00 waitIRq = 0x00 lastBits = None n = 0 i = 0 if command == self.PCD_AUTHENT: irqEn = 0x12 waitIRq = 0x10 if command == self.PCD_TRANSCEIVE: irqEn = 0x77 waitIRq = 0x30 self.Write_MFRC522(self.CommIEnReg, irqEn|0x80) self.ClearBitMask(self.CommIrqReg, 0x80) self.SetBitMask(self.FIFOLevelReg, 0x80) self.Write_MFRC522(self.CommandReg, self.PCD_IDLE); while(i<len(sendData)): self.Write_MFRC522(self.FIFODataReg, sendData[i]) i = i+1 self.Write_MFRC522(self.CommandReg, command) if command == self.PCD_TRANSCEIVE: self.SetBitMask(self.BitFramingReg, 0x80) i = 2000 while True: n = self.Read_MFRC522(self.CommIrqReg) i = i - 1 if ~((i!=0) and ~(n&0x01) and ~(n&waitIRq)): break self.ClearBitMask(self.BitFramingReg, 0x80) if i != 0: if (self.Read_MFRC522(self.ErrorReg) & 0x1B)==0x00: status = self.MI_OK if n & irqEn & 0x01: status = self.MI_NOTAGERR if command == self.PCD_TRANSCEIVE: n = self.Read_MFRC522(self.FIFOLevelReg) lastBits = self.Read_MFRC522(self.ControlReg) & 0x07 if lastBits != 0: backLen = (n-1)*8 + lastBits else: backLen = n*8 if n == 0: n = 1 if n > self.MAX_LEN: n = self.MAX_LEN i = 0 while i<n: backData.append(self.Read_MFRC522(self.FIFODataReg)) i = i + 1; else: status = self.MI_ERR return (status,backData,backLen) def MFRC522_Request(self, reqMode): status = None backBits = None TagType = [] self.Write_MFRC522(self.BitFramingReg, 0x07) TagType.append(reqMode); (status,backData,backBits) = self.MFRC522_ToCard(self.PCD_TRANSCEIVE, TagType) if ((status != self.MI_OK) | (backBits != 0x10)): status = self.MI_ERR return (status,backBits) def MFRC522_Anticoll(self): backData = [] serNumCheck = 0 serNum = [] self.Write_MFRC522(self.BitFramingReg, 0x00) serNum.append(self.PICC_ANTICOLL) serNum.append(0x20) (status,backData,backBits) = self.MFRC522_ToCard(self.PCD_TRANSCEIVE,serNum) if(status == self.MI_OK): i = 0 if len(backData)==5: while i<4: serNumCheck = serNumCheck ^ backData[i] i = i + 1 if serNumCheck != backData[i]: status = self.MI_ERR else: status = self.MI_ERR return (status,backData) def CalulateCRC(self, pIndata): self.ClearBitMask(self.DivIrqReg, 0x04) self.SetBitMask(self.FIFOLevelReg, 0x80); i = 0 while i<len(pIndata): self.Write_MFRC522(self.FIFODataReg, pIndata[i]) i = i + 1 self.Write_MFRC522(self.CommandReg, self.PCD_CALCCRC) i = 0xFF while True: n = self.Read_MFRC522(self.DivIrqReg) i = i - 1 if not ((i != 0) and not (n&0x04)): break pOutData = [] pOutData.append(self.Read_MFRC522(self.CRCResultRegL)) pOutData.append(self.Read_MFRC522(self.CRCResultRegM)) return pOutData def MFRC522_SelectTag(self, serNum): backData = [] buf = [] buf.append(self.PICC_SElECTTAG) buf.append(0x70) i = 0 while i<5: buf.append(serNum[i]) i = i + 1 pOut = self.CalulateCRC(buf) buf.append(pOut[0]) buf.append(pOut[1]) (status, backData, backLen) = self.MFRC522_ToCard(self.PCD_TRANSCEIVE, buf) if (status == self.MI_OK) and (backLen == 0x18): print "Size: " + str(backData[0]) return backData[0] else: return 0 def MFRC522_Auth(self, authMode, BlockAddr, Sectorkey, serNum): buff = [] buff.append(authMode) buff.append(BlockAddr) i = 0 while(i < len(Sectorkey)): buff.append(Sectorkey[i]) i = i + 1 i = 0 while(i < len(serNum)): buff.append(serNum[i]) i = i +1 (status, backData, backLen) = self.MFRC522_ToCard(self.PCD_AUTHENT,buff) if not(status == self.MI_OK): print "AUTH ERROR!!" if not (self.Read_MFRC522(self.Status2Reg) & 0x08) != 0: print "AUTH ERROR(status2reg & 0x08) != 0" return status def MFRC522_Read(self, blockAddr): recvData = [] recvData.append(self.PICC_READ) recvData.append(blockAddr) pOut = self.CalulateCRC(recvData) recvData.append(pOut[0]) recvData.append(pOut[1]) (status, backData, backLen) = self.MFRC522_ToCard(self.PCD_TRANSCEIVE, recvData) if not(status == self.MI_OK): print "Error while reading!" print "Got data size: "+str(backLen) i = 0 if len(backData) == 16: print "Sector "+str(blockAddr)+" "+str(backData) def MFRC522_Write(self, blockAddr, writeData): buff = [] buff.append(self.PICC_WRITE) buff.append(blockAddr) crc = self.CalulateCRC(buff) buff.append(crc[0]) buff.append(crc[1]) (status, backData, backLen) = self.MFRC522_ToCard(self.PCD_TRANSCEIVE, buff) if not(status == self.MI_OK) or not(backLen == 4) or not((backData[0] & 0x0F) == 0x0A): status = self.MI_ERR print str(backLen)+" backdata &0x0F == 0x0A "+str(backData[0]&0x0F) if status == self.MI_OK: i = 0 buf = [] while i < 16: buf.append(writeData[i]) i = i + 1 crc = self.CalulateCRC(buf) buf.append(crc[0]) buf.append(crc[1]) (status, backData, backLen) = self.MFRC522_ToCard(self.PCD_TRANSCEIVE,buf) if not(status == self.MI_OK) or not(backLen == 4) or not((backData[0] & 0x0F) == 0x0A): print "Error while writing" if status == self.MI_OK: print "Data writen" def MFRC522_Init(self): # GPIO.output(self.NRSTPD, 1) self.MFRC522_Reset(); self.Write_MFRC522(self.TModeReg, 0x8D) self.Write_MFRC522(self.TPrescalerReg, 0x3E) self.Write_MFRC522(self.TReloadRegL, 30) self.Write_MFRC522(self.TReloadRegH, 0) self.Write_MFRC522(self.TxAutoReg, 0x40) self.Write_MFRC522(self.ModeReg, 0x3D) self.AntennaOn() def GPIO_CLEEN(self): GPIO.cleanup() 4 lines are commented (109 - 111, 357) and first line is replaced to use pyA20.gpio instead of RPi.GPIO.
After that, I run read.py and it works like a charm.
import MFRC522 import signal continue_reading = True MIFAREReader = MFRC522.MFRC522() cardA = [5,74,28,185,234] cardB = [83,164,247,164,164] cardC = [20,38,121,207,132] def end_read(signal, frame): global continue_reading continue_reading = False print "Ctrl+C captured, ending read." MIFAREReader.GPIO_CLEEN() signal.signal(signal.SIGINT, end_read) while continue_reading: (status,TagType) = MIFAREReader.MFRC522_Request(MIFAREReader.PICC_REQIDL) if status == MIFAREReader.MI_OK: print "Card detected" (status,backData) = MIFAREReader.MFRC522_Anticoll() if status == MIFAREReader.MI_OK: print "Card read UID: "+str(backData[0])+","+str(backData[1])+","+str(backData[2])+","+str(backData[3])+","+str(backData[4]) if backData == cardA: print "is Card A" elif backData == cardB: print "is Card B" elif backData == cardC: print "is Card C" else: print "wrong Card" That is the way to use the reader on ORANGE PI PC. I googled and read further, in order to use second reader I need to modify exact same lines that I commented in order it to work. It controls RC522 with that SDA PIN, chooses from which reader to read the data. I try to uncomment any of them, but errors appear. Looks like those use specific RPi.GPIO functions. My python knowledge is very basic. I try to find where exactly are described pins that are used, and failed. Tried just to replace that pin 24 with 26 in order to read data from second readed. So far no success.