SpenceKonde/ATTinyCore

No serial on ATiny841 2.0.0 Codeline

ahshah opened this issue · 10 comments

ahshah commented

Description: I can flash updates via the IDE using optiboot, however I can't get anything to print to the serial monitor.

Bootloader UART Settings: TX: PA1 RX: PA2
Board settings:
BoardSettings

Heres the code:

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_PIN as an output.
  Serial.begin(115200);
}

// the loop function runs over and over again forever
void loop() {
  Serial.println("on");
  delay(1000);  // wait for a second
  Serial.println("off");
  delay(1000);  // wait for a second
}

Here's the hook up, please note vcc and gnd connections are below the breadboard adapting board. The FTDI is a sparkfun model.

rs_IMG_5364 heic

rs_IMG_5363 heic

ahshah commented

Codeline is currently on d670622: Correct issues with avrdude,conf.m make wiring readable

ahshah commented

The power and gnd rails read 3.3 v , and you can see 3.3v is soldered in the on the sparkfun FTDI controller