實驗1-1 RFID RC522 Interfacing with ESP32 (多核心模式讀取MFRC522)

 實驗1-1   RFID RC522 Interfacing with ESP32 (多核心模式讀取MFRC522)

1) 平時 內建LED 閃爍

2) 當讀取到RFID 卡片時 LED on 5sec --> off 

  //create a task that will be executed in the Task1code() function, with priority 1 and executed on core 0
  xTaskCreatePinnedToCore(
                    Task1code,   /* Task function. */
                    "Task1",     /* name of task. */
                    10000,       /* Stack size of task */
                    NULL,        /* parameter of the task */
                    1,           /* priority of the task */
                    &Task1,      /* Task handle to keep track of created task */
                    0);          /* pin task to core 0 */                  
  delay(500); 

  //create a task that will be executed in the Task2code() function, with priority 1 and executed on core 1
  xTaskCreatePinnedToCore(
                    Task2code,   /* Task function. */
                    "Task2",     /* name of task. */
                    10000,       /* Stack size of task */
                    NULL,        /* parameter of the task */
                    1,           /* priority of the task */
                    &Task2,      /* Task handle to keep track of created task */
                    1);          /* pin task to core 1 */
    delay(500); 
}

ESP32多核心的寫法，步驟是這樣的。

1. 宣告任務變數：Task1_senddata Task1;//宣告Task1任務

2. 設定並執行任務：

    //在核心0啟動任務1

    xTaskCreatePinnedToCore(

    Task1_senddata, /*任務實際對應的Function*/

      "Task1",        /*任務名稱*/（自行設定）

      10000,          /*堆疊空間*/（常用10000）

      NULL,           /*無輸入值*/

      0,              /*優先序0*/0代表最優先執行，1次之，以此類推

      &Task1,         /*對應的任務變數位址*/

      1);             /*指定在核心1執行 */ //指定執行核心編號（0、1或tskNO_AFFINITY：系統指定）

//RC522 SPI Mode

#include <SPI.h>

#include <MFRC522.h>

//GPIO 2 D1 Build in LED

#define LED 2

bool ledState = false;

/* Wiring RFID RC522 module

=============================================================================

GND     = GND   3.3V    = 3.3V

The following table shows the typical pin layout used:

 *             MFRC522      ESP32     Arduino       Arduino   Arduino    Arduino          Arduino

 *             Reader/PCD             Uno/101       Mega      Nano v3    Leonardo/Micro   Pro Micro

 * Signal      Pin          Pin       Pin           Pin       Pin        Pin              Pin

 * -----------------------------------------------------------------------------------------

 * RST/Reset   RST          GPIO27    9             5         D9         RESET/ICSP-5     RST

 * SPI SS      SDA(SS)      GPIO5     10            53        D10        10               10

 * SPI MOSI    MOSI         GPIO23    11 / ICSP-4   51        D11        ICSP-4           16

 * SPI MISO    MISO         GPIO19    12 / ICSP-1   50        D12        ICSP-1           14

 * SPI SCK     SCK          GPIO18    13 / ICSP-3   52        D13        ICSP-3           15

 *

[1] (1, 2) Configurable, typically defined as RST_PIN in sketch/program.

[2] (1, 2) Configurable, typically defined as SS_PIN in sketch/program.

[3] The SDA pin might be labeled SS on some/older MFRC522 boards

=============================================================================

*/

#define SS_PIN  5  // ESP32 pin GIOP5

#define RST_PIN 27 // ESP32 pin GIOP27

MFRC522 rfid(SS_PIN, RST_PIN); // Create MFRC522 instance

bool Read = false;  //true

int Count= 0;       //if RFID Present then LED ON 5sec

//宣告任務Task1

TaskHandle_t Task1;

//===========================================================

//任務1副程式Task1_senddata

void Task1_senddata(void * pvParameters ) {

  //無窮迴圈

  for (;;) {

    //偵測上傳旗標是否為true

    Serial.println("Reading RFID tag");

    if (rfid.PICC_IsNewCardPresent()) { // new tag is available

      if (rfid.PICC_ReadCardSerial()) { // NUID has been readed

        MFRC522::PICC_Type piccType = rfid.PICC_GetType(rfid.uid.sak);

        Serial.print("RFID/NFC Tag Type: ");

        Serial.println(rfid.PICC_GetTypeName(piccType));

        // print UID in Serial Monitor in the hex format

        Serial.print("UID:");

        for (int i = 0; i < rfid.uid.size; i++) {

          Serial.print(rfid.uid.uidByte[i] < 0x10 ? " 0" : " ");

          Serial.print(rfid.uid.uidByte[i], HEX);

        }

        Serial.println();

        Read = true;  //true

        Count= 10;

        rfid.PICC_HaltA(); // halt PICC

        rfid.PCD_StopCrypto1(); // stop encryption on PCD

   

      }

    }

    else  

    {

      // RC522/PN532 probably timed out waiting for a card

      Serial.println("Timed out waiting for a card");

    }      

    //Task1休息，delay(X)不可省略

    delay(1000);

  }

}

//===========================================================

//===========================================================

void setup() {

    // Set software serial baud to 115200;

    Serial.begin(115200);

    delay(1000); // Delay for stability

    // Setting LED pin as output

    pinMode(LED, OUTPUT);

    digitalWrite(LED, LOW);  // Turn off the LED initially

    //======================================================

    SPI.begin();        // Init SPI bus

    rfid.PCD_Init();    // Init MFRC522

    Serial.println(F("Ready!"));

    Serial.println(F("======================================================"));

    Serial.println("Tap an RFID/NFC tag on the RFID-RC522 reader");

    //在核心0啟動任務1

    xTaskCreatePinnedToCore(

    Task1_senddata, /*任務實際對應的Function*/

      "Task1",        /*任務名稱*/

      10000,          /*堆疊空間*/

      NULL,           /*無輸入值*/

      0,              /*優先序0*/

      &Task1,         /*對應的任務變數位址*/

      0);             /*指定在核心0執行 */

}

//===========================================================

void loop()

{

  delay(250);

  digitalWrite(LED, !digitalRead(LED));

  if (Read)

   {

    digitalWrite(LED, HIGH);

    delay(250);

    if (digitalRead(LED))

        ledState = true;

    else

        ledState = false;

    Count=Count-1;

    if (Count == 0 ){

        Read=false;

        digitalWrite(LED, LOW);

        ledState = false;

        Read=false;

    }

  } //(Read)

}

//===========================================================