diff options
| author | Zixun LI <[email protected]> | 2026-05-27 14:38:53 +0200 |
|---|---|---|
| committer | Zixun LI <[email protected]> | 2026-05-27 14:53:08 +0200 |
| commit | da038673936cefdff0e4aacfd2602c665b9f114d (patch) | |
| tree | ec80610db9b3d5c995dc775649d41e398f542614 | |
| parent | 939c2f91c200db2bf9874c2e6c50b3530f8a6725 (diff) | |
Add data loss warning to CH32 USBFS/USBHS
According to WCH FAE transfer complete interrupt is not queued, later completed EP will overwrite INT_ST and RX_LEN.
Which means to guarantee data integrity when multiples EPs are enabled:
- USB IRQ must have highest priority
- IRQ processing time must be less than ZLP duration (~600ns), which is absurd for a 144MHz CPU (85 cycles)
Signed-off-by: Zixun LI <[email protected]>
| -rw-r--r-- | README.rst | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/README.rst b/README.rst index 04998abaa..e1e73c3ad 100644 --- a/README.rst +++ b/README.rst @@ -262,11 +262,11 @@ Supported CPUs +--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+ | ValentyUSB | eptri | ✔ | ✖ | ✖ | eptri | | +--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+ -| WCH | CH32F20x | ✔ | | ✔ | ch32_usbhs | | +| WCH | CH32F20x | ⚠ | | ✔ | ch32_usbhs | Data loss possible | | +-----------------------------+--------+------+-----------+------------------------+--------------------+ -| | CH32V20x | ✔ | | ✖ | stm32_fsdev/ch32_usbfs | | +| | CH32V20x | ⚠ | | ✖ | stm32_fsdev/ch32_usbfs | Data loss possible | | +-----------------------------+--------+------+-----------+------------------------+--------------------+ -| | CH32V305, CH32V307 | ✔ | | ✔ | ch32_usbfs/hs | | +| | CH32V305, CH32V307 | ⚠ | | ✔ | ch32_usbfs/hs | Data loss possible | +--------------+-----------------------------+--------+------+-----------+------------------------+--------------------+ Table Legend |