On Windows 10 for STM32F407VG MCU, Virtual Com port shows only blank screen on putty.

[Sware.1]

My work environment as below :

1. Window 10 (Version 10.0.18362 Build 18362)

2. Laptop processor: AMD PRO A12-8830B R7

3. My Discovery Board: STM32F407VG MCU

 4. Driver Installed : 

   en.stsw-link009 and Virtual Com port : VCP_V1.5.0_Setup_W8_x64

5. Coding Using MBED online compiler.

Issue : When I access COM3 port using Tera Term / putty it shows me blank screen,

Why it don't print Helllo World on putty or Teram Term console ???

But On this board I can run LED blinking programs successfully.

Code :

#include "mbed.h"

Serial pc(USBTX, USBRX); // tx, rx

int main()

{

  while(1) {

    pc.printf("Hello World!\n");

    wait(0.8);

  }

}

Kindly refer below screen snaps of Virtual Com Port, Tera term and Code for more detail.

[TDK]

Check that your port settings match on both sides. Probe the lines to make sure a signal is actually sent.

[Sware.1]

@TDK​ : Kindly elaborate what exactly I should do to port settings match on both sides ? I spend lot of hours in fixing this issue.But not able to find any fix for it.

[TDK]

You'll need to dig into the documentation of whatever software you're using. It's not clear if Serial is using a UART port to talk to the ST-Link or if you're using the USB itself to act as a VCP. I suspect it is the former, in which case the baud rate, data bits, parity and stop bit settings need to match on TeraTerm and within your STM32 UART initialization.

[Sware.1]

I tried with baud rate 9600 and 115200, But it don't work for me.

Any more suggestion ?