I am using cdc device to send message(32 byte length) to host with full speed. The message is send out every 1ms, while the host can only receive the message once around every 20ms second. Looks the speed is too slow. I can found the USBH_OTG_ISR_Handler is trigged around 1khz, but the date is ready to be ready around every 20ms. Any one has the idea on this? How can I let my cdc host read the message every 1ms.