mirror of
https://github.com/semaf/MFRC522_I2C_Library.git
synced 2025-07-30 05:17:14 +02:00
Rewrite of Basic Functions to work with TwoWire
This commit is contained in:
kkloesener
54
examples/MFRC522_i2c.ino
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54
examples/MFRC522_i2c.ino
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#include <Wire.h>
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#include "MFRC522_I2C.h"
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#define RST_PIN 6 // Arduino UNO Pin
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// #define RST_PIN 14 // D5 Pin on NodeMCU
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// 0x28 is i2c address on SDA. Check your address with i2cscanner if not match.
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MFRC522 mfrc522(0x28, RST_PIN); // Create MFRC522 instance.
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void setup() {
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Serial.begin(115200); // Initialize serial communications with the PC
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Wire.begin(); // Initialize I2C
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mfrc522.PCD_Init(); // Init MFRC522
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ShowReaderDetails(); // Show details of PCD - MFRC522 Card Reader details
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Serial.println(F("Scan PICC to see UID, type, and data blocks..."));
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}
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void loop() {
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// Look for new cards, and select one if present
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if ( ! mfrc522.PICC_IsNewCardPresent() || ! mfrc522.PICC_ReadCardSerial() ) {
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delay(50);
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return;
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}
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// Now a card is selected. The UID and SAK is in mfrc522.uid.
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// Dump UID
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Serial.print(F("Card UID:"));
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for (byte i = 0; i < mfrc522.uid.size; i++) {
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Serial.print(mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ");
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Serial.print(mfrc522.uid.uidByte[i], HEX);
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}
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Serial.println();
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}
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void ShowReaderDetails() {
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// Get the MFRC522 software version
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byte v = mfrc522.PCD_ReadRegister(mfrc522.VersionReg);
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Serial.print(F("MFRC522 Software Version: 0x"));
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Serial.print(v, HEX);
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if (v == 0x91)
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Serial.print(F(" = v1.0"));
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else if (v == 0x92)
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Serial.print(F(" = v2.0"));
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else
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Serial.print(F(" (unknown)"));
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Serial.println("");
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// When 0x00 or 0xFF is returned, communication probably failed
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if ((v == 0x00) || (v == 0xFF)) {
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Serial.println(F("WARNING: Communication failure, is the MFRC522 properly connected?"));
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}
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}
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113
examples/dual_i2c_scanner.ino
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113
examples/dual_i2c_scanner.ino
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#include <Wire.h>
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#include "MFRC522_I2C.h"
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// I2C GPIOs
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#define IIC_CLK 32 // internal
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#define IIC_DATA 33 // internal
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// 2nd I2C GPIOs
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#define RST_PIN 12
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#define ext_IIC_CLK 23 // 14-pin-header
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#define ext_IIC_DATA 18 // 14-pin-header
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TwoWire i2cBusOne = TwoWire(0);
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TwoWire i2cBusTwo = TwoWire(1);
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MFRC522 mfrc522(RST_PIN , 0x28, i2cBusTwo);
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void setup() {
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Serial.begin(115200); // Initialize serial communications with the PC
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i2cBusOne.begin(IIC_DATA, IIC_CLK, 40000);
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i2cBusTwo.begin(ext_IIC_DATA, ext_IIC_CLK, 40000);
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}
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void loop() {
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scanBus1();
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delay(3000);
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scanBus2();
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mfrc522.PCD_Init(); // Init MFRC522
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ShowReaderDetails(); // Show details of PCD - MFRC522 Card Reader details
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}
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void scanBus1 () {
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byte error, address;
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int nDevices;
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Serial.println("Scanning...");
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nDevices = 0;
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for(address = 1; address < 127; address++ ) {
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i2cBusOne.beginTransmission(address);
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error = i2cBusOne.endTransmission();
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if (error == 0) {
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Serial.print("Bus1: I2C device found at address 0x");
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if (address<16) {
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Serial.print("0");
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}
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Serial.println(address,HEX);
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nDevices++;
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}
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else if (error==4) {
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Serial.print("Unknow error at address 0x");
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if (address<16) {
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Serial.print("0");
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}
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Serial.println(address,HEX);
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}
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}
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if (nDevices == 0) {
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Serial.println("No I2C devices found\n");
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}
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else {
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Serial.println("done\n");
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}
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}
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void scanBus2 () {
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byte error, address;
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int nDevices;
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Serial.println("Scanning...");
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nDevices = 0;
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for(address = 1; address < 127; address++ ) {
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i2cBusTwo.beginTransmission(address);
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error = i2cBusTwo.endTransmission();
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if (error == 0) {
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Serial.print("Bus2: I2C device found at address 0x");
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if (address<16) {
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Serial.print("0");
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}
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Serial.println(address,HEX);
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nDevices++;
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}
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else if (error==4) {
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Serial.print("Unknow error at address 0x");
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if (address<16) {
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Serial.print("0");
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}
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Serial.println(address,HEX);
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}
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}
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if (nDevices == 0) {
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Serial.println("No I2C devices found\n");
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}
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else {
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Serial.println("done\n");
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}
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}
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void ShowReaderDetails() {
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// Get the MFRC522 software version
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byte v = mfrc522.PCD_ReadRegister(mfrc522.VersionReg);
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Serial.print(F("MFRC522 Software Version: 0x"));
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Serial.print(v, HEX);
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if (v == 0x91)
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Serial.print(F(" = v1.0"));
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else if (v == 0x92)
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Serial.print(F(" = v2.0"));
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else
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Serial.print(F(" (unknown)"));
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Serial.println("");
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// When 0x00 or 0xFF is returned, communication probably failed
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if ((v == 0x00) || (v == 0xFF)) {
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Serial.println(F("WARNING: Communication failure, is the MFRC522 properly connected?"));
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}
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}
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113
examples/dual_i2c_scanner/dual_i2c_scanner.ino
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113
examples/dual_i2c_scanner/dual_i2c_scanner.ino
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@ -0,0 +1,113 @@
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#include <Wire.h>
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#include "MFRC522_I2C.h"
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// I2C GPIOs
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#define IIC_CLK 32 // internal
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#define IIC_DATA 33 // internal
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// 2nd I2C GPIOs
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#define RST_PIN 12
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#define ext_IIC_CLK 23 // 14-pin-header
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#define ext_IIC_DATA 18 // 14-pin-header
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TwoWire i2cBusOne = TwoWire(0);
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TwoWire i2cBusTwo = TwoWire(1);
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MFRC522 mfrc522(RST_PIN , 0x28, i2cBusTwo);
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void setup() {
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Serial.begin(115200); // Initialize serial communications with the PC
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i2cBusOne.begin(IIC_DATA, IIC_CLK, 40000);
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i2cBusTwo.begin(ext_IIC_DATA, ext_IIC_CLK, 40000);
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}
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void loop() {
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scanBus1();
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delay(3000);
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scanBus2();
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mfrc522.PCD_Init(); // Init MFRC522
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ShowReaderDetails(); // Show details of PCD - MFRC522 Card Reader details
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}
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void scanBus1 () {
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byte error, address;
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int nDevices;
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Serial.println("Scanning...");
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nDevices = 0;
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for(address = 1; address < 127; address++ ) {
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i2cBusOne.beginTransmission(address);
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error = i2cBusOne.endTransmission();
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if (error == 0) {
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Serial.print("Bus1: I2C device found at address 0x");
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if (address<16) {
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Serial.print("0");
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}
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Serial.println(address,HEX);
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nDevices++;
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}
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else if (error==4) {
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Serial.print("Unknow error at address 0x");
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if (address<16) {
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Serial.print("0");
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}
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Serial.println(address,HEX);
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}
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}
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if (nDevices == 0) {
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Serial.println("No I2C devices found\n");
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}
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else {
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Serial.println("done\n");
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}
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}
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void scanBus2 () {
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byte error, address;
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int nDevices;
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Serial.println("Scanning...");
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nDevices = 0;
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for(address = 1; address < 127; address++ ) {
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i2cBusTwo.beginTransmission(address);
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error = i2cBusTwo.endTransmission();
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if (error == 0) {
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Serial.print("Bus2: I2C device found at address 0x");
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if (address<16) {
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Serial.print("0");
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}
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Serial.println(address,HEX);
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nDevices++;
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}
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else if (error==4) {
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Serial.print("Unknow error at address 0x");
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if (address<16) {
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Serial.print("0");
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}
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Serial.println(address,HEX);
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}
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}
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if (nDevices == 0) {
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Serial.println("No I2C devices found\n");
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}
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else {
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Serial.println("done\n");
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}
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}
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void ShowReaderDetails() {
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// Get the MFRC522 software version
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byte v = mfrc522.PCD_ReadRegister(mfrc522.VersionReg);
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Serial.print(F("MFRC522 Software Version: 0x"));
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Serial.print(v, HEX);
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if (v == 0x91)
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Serial.print(F(" = v1.0"));
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else if (v == 0x92)
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Serial.print(F(" = v2.0"));
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else
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Serial.print(F(" (unknown)"));
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Serial.println("");
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// When 0x00 or 0xFF is returned, communication probably failed
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if ((v == 0x00) || (v == 0xFF)) {
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Serial.println(F("WARNING: Communication failure, is the MFRC522 properly connected?"));
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}
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}
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131
examples/dual_i2c_scanner_new/dual_i2c_scanner_new.ino
Normal file
131
examples/dual_i2c_scanner_new/dual_i2c_scanner_new.ino
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@ -0,0 +1,131 @@
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#include <Wire.h>
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#include "MFRC522_I2C.h"
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// I2C GPIOs
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#define IIC_CLK 32 // internal
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#define IIC_DATA 33 // internal
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// 2nd I2C GPIOs
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#define RST_PIN 12
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#define ext_IIC_CLK 23 // 14-pin-header
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#define ext_IIC_DATA 18 // 14-pin-header
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byte chipAddress = 0x28;
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TwoWire i2cBusOne = TwoWire(0);
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TwoWire i2cBusTwo = TwoWire(1);
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MFRC522 mfrc522(chipAddress, RST_PIN, i2cBusTwo);
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void setup() {
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byte version;
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byte value;
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Serial.begin(115200); // Initialize serial communications with the PC
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Serial.println("TwoWire Bus 1 initiieren");
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i2cBusOne.begin(IIC_DATA, IIC_CLK, 40000);
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Serial.println("TwoWire Bus 2 initiieren");
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i2cBusTwo.begin(ext_IIC_DATA, ext_IIC_CLK, 40000);
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Serial.println("MFRC522 initiieren");
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mfrc522.PCD_Init();
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Serial.println("MFRC522 Selbsttest");
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}
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void loop() {
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// scanBus1();
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scanBus2();
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ShowReaderDetails(); // Show details of PCD - MFRC522 Card Reader details
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if (mfrc522.PCD_PerformSelfTest()) {
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Serial.println("Selftest OK");
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} else Serial.println("Selftest not OK");
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delay(5000);
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}
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void scanBus1 () {
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byte error, address;
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int nDevices;
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Serial.println("Scanning...");
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nDevices = 0;
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for(address = 1; address < 127; address++ ) {
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i2cBusOne.beginTransmission(address);
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error = i2cBusOne.endTransmission();
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if (error == 0) {
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Serial.print("Bus1: I2C device found at address 0x");
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if (address<16) {
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Serial.print("0");
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}
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Serial.println(address,HEX);
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nDevices++;
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}
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else if (error==4) {
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Serial.print("Unknow error at address 0x");
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if (address<16) {
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Serial.print("0");
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}
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Serial.println(address,HEX);
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}
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}
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if (nDevices == 0) {
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Serial.println("No I2C devices found\n");
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}
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else {
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Serial.println("done\n");
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}
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}
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void scanBus2 () {
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byte error, address;
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int nDevices;
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Serial.println("Scanning...");
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nDevices = 0;
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for(address = 1; address < 127; address++ ) {
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i2cBusTwo.beginTransmission(address);
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error = i2cBusTwo.endTransmission();
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if (error == 0) {
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Serial.print("Bus2: I2C device found at address 0x");
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if (address<16) {
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Serial.print("0");
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}
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Serial.println(address,HEX);
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nDevices++;
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}
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else if (error==4) {
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Serial.print("Unknow error at address 0x");
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if (address<16) {
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Serial.print("0");
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}
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Serial.println(address,HEX);
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}
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}
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/* if (nDevices == 0) {
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Serial.println("No I2C devices found\n");
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pinMode(RST_PIN, OUTPUT);
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if (digitalRead(RST_PIN) == LOW) { //The MFRC522 chip is in power down mode.
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digitalWrite(RST_PIN, HIGH); // Exit power down mode. This triggers a hard reset.
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// Section 8.8.2 in the datasheet says the oscillator start-up time is the start up time of the crystal + 37,74<37>s. Let us be generous: 50ms.
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delay(200);
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}
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else {
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Serial.println("done\n");
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}
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} */
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}
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void ShowReaderDetails() {
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byte version = mfrc522.PCD_ReadRegister(mfrc522.VersionReg);
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switch (version) {
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case 0x88: // Fudan Semiconductor FM17522 clone
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Serial.println("Fudan Semiconductor FM17522 clone");
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break;
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case 0x90: // Version 0.0
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Serial.println("Version 0.0");
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break;
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case 0x91: // Version 1.0
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Serial.println("Version 1.0");
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break;
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case 0x92: // Version 2.0
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Serial.println("Version 2.0");
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break;
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default: // Unknown version
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Serial.println("Unknown version");
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}
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}
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Block a user