rt-thread.git/components/legacy/usb/usbdevice/class, branch masterUnnamed repository; edit this file 'description' to name the repository.http://cgit.235523.xyz/rt-thread.git/atom/components/legacy/usb/usbdevice/class?h=master2026-10-11T09:37:11Zfix[usb]: support VCOM polling receive with Serial V22026-10-11T09:37:11ZJaeyeong Leelee@jaeyeong.cc2026-09-11T23:56:47Zurn:sha1:ceef6e0ccd646aef61b907aeb9f29269d1caba50
Signed-off-by: Jaeyeong Lee <lee@jaeyeong.cc>
fix[usb]: stop aliasing rt_ringbuffer as rt_serial_rx_fifo in VCOM2026-10-11T09:37:11ZJaeyeong Leelee@jaeyeong.cc2026-08-29T11:48:24Zurn:sha1:8a3ca7bfa3fb0b779fe24fd912a3a72cc2aeb59d
With RT_USB_DEVICE_CDC and RT_USING_SERIAL_V2 both enabled, _function_enable
assigned the embedded rx_ringbuffer to serial.serial_rx. Serial V2 reads that
pointer as a struct rt_serial_rx_fifo, whose first member is a rt_ringbuffer,
so ring-buffer access happened to work while rx_cpt, rx_cpt_index and
rx_timeout landed on the following members of struct vcom, corrupting tx_rbp.
The layout shifts again with RT_SERIAL_USING_DMA, which inserts dma_ping_rb
ahead of those fields.
Serial V2 already owns the receive FIFO: dev_serial_v2.c allocates it with
rt_malloc on open and releases it with rt_free on close, so the assignment
also made rt_free run on memory inside struct vcom.
Drop the assignment and read the FIFO Serial V2 owns. rt_hw_serial_isr
reports RX_IND from serial_rx->rb, so the endpoint handler now fills that
ring buffer and _vcom_getc drains it. The Serial V1 path is unchanged.
Fixes #11739
Signed-off-by: Jaeyeong Lee <lee@jaeyeong.cc>
components/usb: configure CDC VCOM strings2026-07-06T05:17:44ZOld-Ding35417409+Old-Ding@users.noreply.github.com2026-07-01T05:43:25Zurn:sha1:8a0fe09c659b74ed2543d87a36a12355053b2630refactor(drivers/usb):replace rtt usb stack with cherryusb (#8799)2024-06-02T03:20:13Zsakumisu1203593632@qq.com2024-06-02T03:20:13Zurn:sha1:62d321caa028dee04bf0b43fc0abb68b40e80ddd