Hello
I am developing an application on STM32F429 device. The application uses CDC device I started with the example application of Keil and modified it to work with the STM32F407 discovery board (mainly changed clock settings). I am able to send data to the VCP on windows (using Hyper Terminal on windows side). Yet I am able to send only a single byte from the Hyper Terminal towards the device. From there on - I am getting the following error (observed by sniffer): Device Object USBPDO-18 Driver Object USBHUB3
URB Function URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER URB Status USBD_STATUS_CANCELED
Endpoint 02h 2 Out, Bulk Right after the transfer...:
Device Object USBPDO-18 Driver Object USBHUB3
URB Function URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER
Endpoint 02h 2 Out, Bulk
Bytes to Transfer 1
Any ideas why that can happen?
Thanks Igor