[New Variant]Regarding the support for the STM32F429IGT6 chip

[JingtaiChen]

Hello, I tried to add support for STM32F429IGT6. However, when I configured the clock tree as shown below and enabled USB, and then configured it according to the previous method, I went to Arduino and configured USB as CDC, but it couldn't be simulated as CDC. What should I do? My clock file is as shown in Figure 4