tx_size = 0;
/* Blocking write */
memcpy(ep_buffer[ep_num], buffer, size);
__usb_ep_write(ep_num, ep_buffer[ep_num], size,
usb_endpointWrite_complete);
tx_size = 0;
/* Blocking write */
memcpy(ep_buffer[ep_num], buffer, size);
__usb_ep_write(ep_num, ep_buffer[ep_num], size,
usb_endpointWrite_complete);