USBSerial on STM32F412ZG (NUCLEO-144)

[JohnnyK (Jan Kamidra)]

Hello,

I only know, the DTR signal is required from your serial application on your PC, if the USB was recognized by the PC.

USB Serial not working in mbed-os 6

Hi there, I do not have LPC1768 but I’m working on the Nucleo-F429ZI with USB OTG and it is working. The USBSerial is set to blocking in the default. That mean it waits for a connection from opposite side, that is the reason why your code not reach the main. So until you not connect a terminal application on your pc to a correct port nothing will happen. The PC application also need manage the DTR signal. Also you can not call _printc for call a string without a for loop, the _printc(int c) …

With the H743 there were an issue

Mbed NUCLEO_H7743ZI2 doesn't support USBDEVICE

is there any progress on this problem? I tried also to use USBDevice on a H743 Board but with the same result, the USB enumeration fails because the descriptor is not read properly. The USB Int is fired a few times, but only the SOF callback is called. When I step through the isr, a read is also performed. It looks like some weird timing problem? I have compared also the settings with CubeMX generated code, the init looks the same (using USE_USB_OTG_FS). USBPhy_STM32.cpp handles USB on F4 and…

BR, Jan