/*
 * Adafruit MCP2515 FeatherWing CAN Receiver Example
 */

#include <Adafruit_MCP2515.h>

#define CS_PIN    21


// Set CAN bus baud rate
#define CAN_BAUDRATE (125000)

Adafruit_MCP2515 mcp(CS_PIN);


//affichage
#include "SSD1306Wire.h" //pour OLEDSSD3306
SSD1306Wire  display(0x3c, SDA, SCL);//instancier un objet display I2C adresse = $78 (soit $3c sur 7bits)


void setup() {
  Serial.begin(115200);
  while(!Serial) delay(10);


//init du oled LCD
  display.init();
  
  Serial.println("MCP2515 Receiver test!");

  if (!mcp.begin(CAN_BAUDRATE)) {
    Serial.println("Error initializing MCP2515.");
    while(1) delay(10);
  }
  Serial.println("MCP2515 chip found");
}

void loop() {

  //LCD
  display.setFont(ArialMT_Plain_16);//font pour oled
  display.setTextAlignment(TEXT_ALIGN_CENTER); //aligne le texte
  display.drawString(40, 0, "BUS CAN RX\n\r"); //ecrit la phrase  dans le buffer
  display.display(); //affiche sur l'écran le buffer

  
  // try to parse packet
  int packetSize = mcp.parsePacket();

  if (packetSize) {
    // received a packet
    Serial.print("Received ");

    if (mcp.packetExtended()) {
      Serial.print("extended ");
    }

    if (mcp.packetRtr()) {
      // Remote transmission request, packet contains no data
      Serial.print("RTR ");
    }

    Serial.print("packet with id 0x");
    Serial.print(mcp.packetId(), HEX);

    if (mcp.packetRtr()) {
      Serial.print(" and requested length ");
      Serial.println(mcp.packetDlc());
    } else {
      Serial.print(" and length ");
      Serial.println(packetSize);

      // only print packet data for non-RTR packets
      while (mcp.available()) {
        //Serial.print((char)mcp.read());
        Serial.print(mcp.read());
      }
      Serial.println();
    }

    Serial.println();
  }
}