Issue with Buffer.

[gannaramu]

Hello,

Firstly thank you so much for the library!. I currently have a MCP2517fd click board by mikroE. after some good time, I was able to figure out how to get it to work. the issue I am currently facing is that I am just able to receive a small set of can message after which I don't receive any more messages.
I am using a teensy4.0.

Below is the code I am running on it. Could you let me know what I am doing wrong.. I have gone through the documentation but couldn't figure out why I was facing this issue? could you guide me?

//——————————————————————————————————————————————————————————————————————————————
//  ACAN2517FD or ACAN2518FD send-even, for Teensy 3.5 using SPI1
//——————————————————————————————————————————————————————————————————————————————

#include <ACAN2517FD.h>

//——————————————————————————————————————————————————————————————————————————————
//  MCP2517FD connections: adapt theses settings to your design
//  As hardware SPI is used, you should select pins that support SPI functions.
//  This sketch is designed for a Teensy 3.5, using SPI1
//  But standard Teensy 3.5 SPI1 pins are not used
//    SCK input of MCP2517 is connected to pin #32
//    SDI input of MCP2517 is connected to pin #0
//    SDO output of MCP2517 is connected to pin #1
//  CS input of MCP2517 should be connected to a digital output port
//——————————————————————————————————————————————————————————————————————————————

static const byte MCP2517_SCK = 13 ; // SCK input of MCP2517
static const byte MCP2517_SDI =  11 ; // SDI input of MCP2517
static const byte MCP2517_SDO =  12 ; // SDO output of MCP2517

static const byte MCP2517_CS  = 10 ; // CS input of MCP2517
static const byte MCP2517_INT = 9 ; // INT output of MCP2517

//——————————————————————————————————————————————————————————————————————————————
//  ACAN2517FD Driver object
//——————————————————————————————————————————————————————————————————————————————

ACAN2517FD can (MCP2517_CS, SPI, MCP2517_INT) ;
static unsigned gSendDate = 0 ;
static unsigned gSentCount = 0 ;
static unsigned gReceivedCount = 0 ;
//——————————————————————————————————————————————————————————————————————————————
//   SETUP
//——————————————————————————————————————————————————————————————————————————————

void setup () {
//--- Switch on builtin led
  pinMode (LED_BUILTIN, OUTPUT) ;
  digitalWrite (LED_BUILTIN, HIGH) ;
//--- Wait for Serial monitor (blink at 5 Hz)
  Serial.begin (38400) ;
  while (!Serial) { digitalWrite (LED_BUILTIN, !digitalRead (LED_BUILTIN)) ; }
//----------------------------------- Begin SPI1
  SPI.begin () ;
//----------------------------------- Configure ACAN2517FD
//--- For version >= 2.1.0
  ACAN2517FDSettings settings (ACAN2517FDSettings::OSC_40MHz, 250 * 1000, DataBitRateFactor::x8);
settings.mRequestedMode = ACAN2517FDSettings::NormalFD;

//--- For version < 2.1.0
//  ACAN2517FDSettings settings (ACAN2517FDSettings::OSC_4MHz10xPLL, 1000 * 1000, ACAN2517FDSettings::DATA_BITRATE_x8) ;
  settings.mDriverReceiveFIFOSize = 5000 ;
//--- Begin
  const uint32_t errorCode = can.begin (settings, canISR) ;
  Serial.print ("Bit Rate prescaler: ") ;
  Serial.println (settings.mBitRatePrescaler) ;
  Serial.print ("Arbitration Phase segment 1: ") ;
  Serial.println (settings.mArbitrationPhaseSegment1) ;
  Serial.print ("Arbitration Phase segment 2: ") ;
  Serial.println (settings.mArbitrationPhaseSegment2) ;
  Serial.print ("Arbitration SJW:") ;
  Serial.println (settings.mArbitrationSJW) ;
  Serial.print ("Actual Arbitration Bit Rate: ") ;
  Serial.print (settings.actualArbitrationBitRate ()) ;
  Serial.println (" bit/s") ;
  Serial.print ("Exact Arbitration Bit Rate ? ") ;
  Serial.println (settings.exactArbitrationBitRate () ? "yes" : "no") ;
  Serial.print ("Arbitration Sample point: ") ;
  Serial.print (settings.arbitrationSamplePointFromBitStart ()) ;
  Serial.println ("%") ;
  Serial.print ("Data Phase segment 1: ") ;
  Serial.println (settings.mDataPhaseSegment1) ;
  Serial.print ("Data Phase segment 2: ") ;
  Serial.println (settings.mDataPhaseSegment2) ;
  Serial.print ("Data SJW:") ;
  Serial.println (settings.mDataSJW) ;
  Serial.print ("TDCO:") ;
  Serial.println (settings.mTDCO) ;
  Serial.print ("Even, error code 0x") ;
  Serial.println (errorCode, HEX) ;
 //--- Endless  loop on error
  while (errorCode != 0) { }
}


//——————————————————————————————————————————————————————————————————————————————
//   RECEIVE FUNCTION
//——————————————————————————————————————————————————————————————————————————————

void receiveFromFilter0 (const CANFDMessage & inMessage) {
  Serial.println ("Match filter 0") ;
}
//——————————————————————————————————————————————————————————————————————————————

void receiveFromFilter1 (const CANFDMessage & inMessage) {
  Serial.println ("Match filter 1") ;
}

//——————————————————————————————————————————————————————————————————————————————

void receiveFromFilter2 (const CANFDMessage & inMessage) {
  Serial.println ("Match filter 2") ;
}
//——————————————————————————————————————————————————————————————————————————————

static uint32_t gBlinkLedDate = 0 ;
static uint32_t gSentFrameCount = 0 ;
static uint32_t gReceivedFrameCount = 0 ;
static bool gCompleted = false ;
static const uint32_t SEND_COUNT = 50 * 1000 ;

//——————————————————————————————————————————————————————————————————————————————
void canISR () {
can.isr () ;
Serial.println("Interrupt Called");
handleReceivedMessages();

}
static void handleReceivedMessages (void) {
  CANFDMessage frame ;
//  Serial.println("Waiting ");
  while (can.receive (frame)) {
    gReceivedFrameCount ++;
    Serial.print("ID: ");
    Serial.print(frame.id,HEX);
    Serial.print(" len: ");
    Serial.print(frame.len);
    Serial.print(" data: ");
    for ( uint8_t i = 0; i < 8; i++ ) {
      Serial.print(frame.data[i], HEX); Serial.print(" ");
    }
    Serial.println("");
  }
}
static uint8_t gPhase = 0 ;

//——————————————————————————————————————————————————————————————————————————————
// 18F0010B 08FE6E0B
void loop () {
handleReceivedMessages();
}
void PrintHex8(uint8_t *data, uint8_t length) // prints 8-bit data in hex with leading zeroes
{
       Serial.print("0x");
       for (int i=0; i<length; i++) {
         if (data[i]<0x10) {Serial.print("0");}
         Serial.print(data[i],HEX);
         Serial.print(" ");
       }
}
//——————————————————————————————————————————————————————————————————————————————