How to communicate with ATTiny85/Digispark via USB on PC?

Question

Recently I'm trying to make a simple LED controller with ATTiny85/Digispark.

I tried to use DigiCDC lib to perform data IO but it does not work on my PC (win10 x64).

test code:

#include <DigiCDC.h>

void setup()
{
  pinMode(0, OUTPUT);
  pinMode(1, OUTPUT);

  SerialUSB.begin();
  SerialUSB.println("hello world");
}

void loop()
{
  digitalWrite(0, HIGH);
  digitalWrite(1, HIGH);
  delay(200);
  digitalWrite(0, LOW);
  digitalWrite(1, LOW);
  delay(800);
  
  SerialUSB.println("ping");
  int ava = SerialUSB.available();
  int buffer[ava];

  // read buffer
  for(int step = 0; step < ava; step++)
    buffer[step] = SerialUSB.read();
  // write buffer back
  for(int step = 0; step < ava; step++)
    SerialUSB.print(buffer[step]);
  SerialUSB.println("==line end==");
  delete buffer;
}

Official demo mentioned here (Arduino IDE - Files - Examples - DigiCDC - Echo) also did not work.

Once program is compiled and uploaded onto board, Windows shows a "Unknown USB device" notification. And no usable serial port devices can be found.

Are there missing some drivers?
Or DigiCDC lib is simply not working on Win10?
Or I should use another lib to achieve communication between PC and ATTiny85/Digispark via USB?

How to communicate with ATTiny85/Digispark via USB on PC?

0 Answers0