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(AP
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