9 months, 1 week ago.

USB Device support on STM32F429ZI not working with repository code

Hi I have been trying to get USB device code with the mbed-os source from Github to work with my STM32F429ZI and it won't. If I use the mbed.lib and import the "USBDevice" library from the examples it works fine.

However, if I replace mbed.lib with the repository source the code compiles but the binary does not work. I noticed minor changes to the mbed-os source from the example that relate to "non-blocking".

Has anyone from mbed tried to get the latest example here (https://os.mbed.com/docs/mbed-os/v5.14/apis/usbserial.html) to work with repository code? Thanks Bill

#include "mbed.h"
#include "USBSerial.h"

// Virtual USB Serial port
USBSerial usb_serial(1155, 22336);  //STM Vendor ID and PID

DigitalOut led(LED1);

int main(void)
    int i = 0;

    // Print on STDIO
    printf("USBDevice Serial started\r\n");

    while(1) {

        // Print on Virtual USB Serial port
        usb_serial.printf("I am a virtual serial port: %d\r\n", i++);

        led = !led;
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