Definition of my_board.json for Atmega32U4 custom board

bichler123 · May 23, 2023, 4:08pm

I retried to enter the code on my board withour pressing the reset button again, and now this error message appears:

bichler123 · May 23, 2023, 4:17pm

Do I need to press the reset button? While pressing the reset button, this message appears:

maxgerhardt · May 23, 2023, 4:20pm

I’m out of my depth here, you may have better chances at the general Arduino forum or AVRdude discussion in regards to what protocol / flags you need for flashing: avrdudes/avrdude · Discussions · GitHub

bichler123 · May 23, 2023, 4:22pm

Ok, thank you nevertheless.

bichler123 · May 23, 2023, 4:27pm

But do I have to press the reset button or not?

bichler123 · May 25, 2023, 7:02pm

I received good help here regarding the flashing of the firmware:

Now I would like to send some data from the custom board to a terminal prgram via the serial interface. Unfortunately, I can’t select a serial port that belongs to my board in Docklight, for example. Do I have to install any drivers? Or have I possibly installed the wrong one?
Thanks in advance!

maxgerhardt · May 25, 2023, 7:23pm

Well what’s the sketch you’re uploading to the board? Does it have Serial.begin(); in it?

bichler123 · May 25, 2023, 7:29pm

It’s this:

void setup() {
// put your setup code here, to run once:
tft.begin();
Serial.begin(9600);
}

String inString = “”;

while(Serial.available() > 0)
{
char inChar = Serial.read();
inString += inChar;
delay(10);
}
if(inString != “”)
{
Serial.println("Input string: ");
}

Do I need a USB terminal programme, instead of a virtual com-port terminal programm, to communicate between my custom board and the PC?

maxgerhardt · May 25, 2023, 7:32pm

Before doing any of the more complicated USB / TFT stuff, have you verified that you can blink a simple LED?

github.com

platformio/platform-atmelavr/blob/056ad26979f19ac24fe3aaf2a947fda980b87fab/examples/arduino-blink/src/Blink.cpp#L7-L25


      
          #include <Arduino.h>
          
          
void setup()
          {
            // initialize LED digital pin as an output.
            pinMode(LED_BUILTIN, OUTPUT);
          }
          
          
void loop()
          {
            // turn the LED on (HIGH is the voltage level)
            digitalWrite(LED_BUILTIN, HIGH);
            // wait for a second
            delay(1000);
            // turn the LED off by making the voltage LOW
            digitalWrite(LED_BUILTIN, LOW);
             // wait for a second
            delay(1000);
          }

change LED_BUILTIN to whatever, pin mapping is per here.

If that’s not working, something is totally not right. You might be running into a situation where the sketch is being uploaded to the wrong address with regards to your chip’s currently set fuses / no Arduino bootloader situation, thus resulting in nothing being run actually.