enc28j60-register-test.ino

#include <SPI.h>

/*
 * DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. You just DO WHAT THE FUCK YOU WANT TO.
 */

// I made this code in order to check if my ENC28J60 module works
// As this program says for now, it's not capable of changing
// Register Bank, so my conclusion is that it's dead. I don't have
// working ENC28J60 tho, so don't be pissed if this code says
// that your ENC is broken, since it's not tested.

void setup() {
  Serial.begin(115200);
  Serial.println("Starting...");
  SPI.begin();
  SPI.setClockDivider(SPI_CLOCK_DIV8);
  digitalWrite(SS, HIGH);

}

void loop() {
  byte MSEND, MRECV; // Master Send/Receive

  digitalWrite(SS, LOW);
  MSEND = 0b11111111; // Send "SYSTEM RESET COMMAND"
  SPI.transfer(MSEND);
  digitalWrite(SS, HIGH);
  
  digitalWrite(SS, LOW);
  MSEND = 0b00011111; // Send "Read Control Register ECON1"
  MRECV = SPI.transfer(MSEND);
  digitalWrite(SS, HIGH);
  Serial.print("ECON1: ");
  Serial.print(MRECV, BIN);
  Serial.println();

  Serial.println("Sending Bank Select 3...");
  digitalWrite(SS, LOW);
  MSEND = 0b01011111; // Send "Write Control Register ECON1"
  SPI.transfer(MSEND);
  MSEND = 0b00000011; // ECON1 Bank Select 3
  SPI.transfer(MSEND);
  digitalWrite(SS, HIGH);

  digitalWrite(SS, LOW);
  MSEND = 0b00011111; // Send "Read Control Register ECON1"
  MRECV = SPI.transfer(MSEND);
  digitalWrite(SS, HIGH);
  Serial.print("ECON1: ");
  Serial.print(MRECV, BIN);
  Serial.println();

  if(MRECV == 0b00000011)
    Serial.println("ECON1 Bank select OK")
  else
    Serial.println("ECON1 Bank select ERROR")
  
  while(1){}; // Don't loop
}