[Solved]Cant use Serial.print in setup()

[feel]

Hi, i got issues when i try to use Serial.print func in setup(). Here the code i use

Code: Select all

void setup() {
 Serial.begin(115200);
 Serial.print("Hello, World");

}

void loop() {
  

}

I use STM32F411CEU6 Board, thank you!

[fpiSTM]

Well with those information what did you expect ?
Which core?
Which target selected? generic? blackpill?...
Is it Hardware Serial or USB CDC ?

If Serial is the USB CDC then you have to wait after the begin.

Code: Select all

While(!Serial){};

https://www.arduino.cc/reference/en/lan ... /ifserial/

[feel]

i use this settings for my code

settings.png (16.93 KiB) Viewed 4255 times

[ag123]

can you describe your issues?
what is the serial terminal/monitor that you are using?
did you try
Serial.println("hello world") instead?
did you manage to blink the led?

have you reviewed these links?
viewtopic.php?f=2&t=3
viewtopic.php?f=2&t=301

[fpiSTM]

Try this as stated before:

Code: Select all

void setup() {
 Serial.begin(115200);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB
  }
 Serial.print("Hello, World");
}

void loop() {
}

And check that Serial is properly enumerated and you select the right COM port.

[ag123]

oh and in linux modemmanager can mess with usb-serial, but describe it more as we've no idea what is wrong.

if you are using linux and you suspect modemmanager could be causing it, check the faq in the wiki
https://github.com/stm32duino/wiki/wiki ... itor-fails

[feel]

Thanks it worked! i just try to print something in setup() in my project but i found out its not working.
thank you for the support guys

[fpiSTM]

Thanks it worked! i just try to print something in setup() in my project but i found out its not working.
thank you for the support guys

Fine. The while was the solution?

[feel]

Yeah the while was the solution, im still new to use this stm32duino so i'd need to learn much things