In Keil's Run Time Environment
I will only use USB Port I use it as virtual com.
When I coding USB Host Virtual com as usbh cdc acm, usart port included, why??
////////////////////////// extern ARM_DRIVER_USART Driver_USART9; #define ptrUART_USB (&Driver_USART9) ////////////////////////
In keil's "manage run time environment" configure mcu : stm32f207vc CMSIS : core RTOS : Keil RTX CMSIS Driver : USART(API) : CDC, USART USB Host(API) : Full Speed Device : CStartup, classic Device : common,Cortex,DMA,GPIO,RCC USB : Host :CDC