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USB Host Mass Storage Class

vijay karthik

I have been trying to program my stm32f429i discovery board as a Mass Storage Class Host for Read/Write operations in a USB Pendrive. I'm using Keil uv5 compiler. When i select the appropriate packs and compile. It shows the following error:

USBH_FS_STM32F4xx.c(877): error: #20: identifier "ARM_USBH_PIPE_HANDLE" is undefined

USBH_FS_STM32F4xx.c(354): error: #20: identifier "ARM_USBH_SignalPipeEvent_t" is undefined