/*+++ACAN2515+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*
     ACAN2515:  Version 2.1.0 vom 16.02.2022
     Programmspeicherbedarf:  214442 Byte
     Board   :  Wemos D1 R32, ESP32 
                Boardeinstellung: !!ESP32 DEV Modul!! 
     Shield  :  Watterott Can-Bus V2
                Quarz 16MHz
                Baudrate[sw] 10kb/s
                Ub: 3,3V /5,0V
                Rs: !120 Ohm! Kein Jumper
                Standart Pinning SPI
     Bemerkung: ICSP auf Pin 
     Script  :  V 0.1
     inArbeit:  x
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/

#ifndef ARDUINO_ARCH_ESP32
  #error "Select an ESP32 board" 
#endif

//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*
#include "ACAN2515.h"                                                       // "" Lib im Ordner; <> extern

static const byte MCP2515_SCK  = 18 ;                                       // SCK input of MCP2515
static const byte MCP2515_MOSI = 23 ;                                       // SDI input of MCP2515
static const byte MCP2515_MISO = 19 ;                                       // SDO output of MCP2515
static const byte MCP2515_CS  = 5 ;                                         // CS input of MCP2515 

static const byte MCP2515_INT = 26 ;                                        // INT (2) output of MCP2515
static const uint8_t LED_BUILTIN =2;                                        // Board_Led

uint8_t Tx  =  12;                                                          // Sende_LED_D03
uint8_t Rx  =  14;                                                          // Empfangs_LED_D02

String Ver="ESP_R32_REC_xV.01";

ACAN2515 can (MCP2515_CS, SPI,MCP2515_INT ) ;                               // Einstellung ACAN 2515
static const uint32_t QUARTZ_FREQUENCY = 16UL * 1000UL * 1000UL ;           // Quarz Frequenz Can-Bus 16MHz

//+++Setup++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*
void setup () 
{
    pinMode (LED_BUILTIN, OUTPUT) ;
    digitalWrite (LED_BUILTIN, HIGH) ;
    pinMode(Tx, OUTPUT); digitalWrite(Tx, LOW);                             // Ausgang; Tx_Led out, kurz aktiv
    pinMode(Rx, OUTPUT); digitalWrite(Rx, HIGH);                            // Ausgang; Rx_Led out, kurz aktiv
    
    Serial.begin (115200) ;                                                  // Serial_Schnittstelle bitrate 115200 b/s
    while (!Serial) 
    {
      delay (100);
      digitalWrite (LED_BUILTIN, !digitalRead (LED_BUILTIN)) ;
    }
    delay (100);
    digitalWrite (LED_BUILTIN, LOW) ;

    SPI.begin (MCP2515_SCK, MCP2515_MISO, MCP2515_MOSI) ;                   // SPI ini Standart
    Serial.println ("ACAN2515 Ini") ;                                       // Info_001 ex
    delay(200);
                                                                            
    ACAN2515Settings settings (QUARTZ_FREQUENCY, 10UL * 1000UL) ;           // CAN bit rate 10 kb/s
    settings.mRequestedMode = ACAN2515Settings::NormalMode;                 // LoopBackMode,NormalMode
    const uint16_t errorCode = can.begin (settings, [] { can.isr () ; }) ;
  
    if (errorCode == 0) 
    {
      Serial.println("Setting");
      Serial.printf ("Bit Rate prescaler: %d\t\n",settings.mBitRatePrescaler) ;
      Serial.printf ("Propagation Segment: %d\t\n",settings.mPropagationSegment) ;
      Serial.printf ("Phase segment 1: %d\t\n",settings.mPhaseSegment1) ;
      Serial.printf ("Phase segment 2: %d\t\n",settings.mPhaseSegment2) ;
      Serial.printf ("SJW: %d\t\n",settings.mSJW) ;
      Serial.printf ("Triple Sampling: %s\t\n",(settings.mTripleSampling ? "yes" : "no")) ;
      Serial.printf ("Actual bit rate: %d bit/s\t\n",settings.actualBitRate ()) ;
      Serial.printf ("Exact bit rate ? %s\t\n",(settings.exactBitRate () ? "yes" : "no")) ;
      Serial.printf ("Sample point: %d%%\t\n\n",settings.samplePointFromBitStart ()) ;
      Serial.printf ("Configuration error: 0x%X\nRUN\n",errorCode) ;
    } 
    else
    {
     Serial.printf ("Configuration error: 0x%X\nSTOP!\n",errorCode) ;
    }
    Serial.println (Ver) ;     delay (1000);
}

//+++Loop++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*

void loop () 
{
      CANMessage frame ;
      if (can.receive (frame)) 
      {
        digitalWrite(Rx, HIGH);                                               // Rx LED High
        if (frame.id>=0xF9 && frame.id<=0x55F)                                // * Löschen Adressbereich Junkers                                
        {                                                                     // * Löschen, Empfang ohne Adressbegrenzung
        Serial.printf("CAN_Bus sendet -->id:0x%X\text: %d\trtr: %d\tlen: %d\tdata:",
        (frame.id),(frame.ext),(frame.rtr),(frame.len));
        for(int x=0;x<frame.len;x++) 
        {
          Serial.printf(" 0x%X",frame.data[x]);
        }
      Serial.println("*");
        }                                                                    // * Löschen, Empfang ohne Adressbegrenzung
      digitalWrite(Rx, LOW);                                                 // Rx LED Low
      }
}

//+++Ende+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*