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COM port disconnect from USB way to know it STM32F205

Question asked by on Nov 17, 2014
Latest reply on Jan 29, 2015 by baroudi.badreddine
I use today the USB OTG with ST example stm32_vcp_1.3.1.
I want to know if there a way to know that a connection I made with teh PC by openning COM port close.
I use today the function  DCD_OTG_ISR(USB_OTG_CORE_HANDLE *pdev) but it only tell me whne a phisical connection was remove.