From dffc57135846a4b00aca06b2f588daa6d13b67ef Mon Sep 17 00:00:00 2001 From: Ha Thach Date: Thu, 11 Jun 2026 10:17:28 +0700 Subject: Fix stm32f723disco host/cdc_msc_hid HIL: UART RX starvation + DWC2 DMA split-IN NAK storm (#3677) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Fix stm32f723disco host HIL: UART RX starvation + DWC2 split bulk NAK/XactErr handling (#3677) stm32f7 BSP — UART RX starvation - The host console USART shared interrupt priority with the USB OTG ISR, so a long OTG interrupt could starve RXNE and drop received bytes. Raise the USART RX IRQ above OTG_FS/OTG_HS in both the bare-metal and FreeRTOS init paths, guarded by #ifdef UART_ID so boards without a UART console keep the default OTG priority. dwc2 host — split NAK/XactErr handling - Slave mode: a persistently-NAKing split bulk/control IN poll re-armed the start-split immediately, storming the ISR and starving task context. Throttle by disabling the channel and re-arming on the resulting halt (no frame deferral). - Buffer-DMA mode: a pure split bulk-OUT NAK was unhandled, leaving the channel halted and stalling the transfer — the dominant cause of CDC echo truncation. Handle it by rewinding the buffer pointers and retrying the start-split (Programming Guide v4.20a 5.1.4.2). - Buffer-DMA mode: a split bulk-OUT XactErr was retried immediately, exhausting HCD_XFER_ERROR_MAX before the transient cleared. Throttle via channel_disable + re-arm to give the hub TT a recovery gap, mirroring slave mode. - All three are scoped to split transfers (hcsplt.split_en); non-split NAK/XactErr keep the core-handled / immediate-retry behavior. The OUT XactErr throttle also excludes periodic split, where channel_disable() is a no-op and would wedge the channel. The nak_disabled flag is generalized to retry_disabled and honors xfer->closing so an endpoint close during a throttled retry tears down cleanly. Verified on stm32f723disco HIL (slave + CFG_TUH_DWC2_DMA_ENABLE): host/cdc_msc_hid, msc_file_explorer, and device_info all pass on both variants; DMA CDC echo went from ~15-25% raw failure to 10/10 clean. --- tools/codespell/ignore-words.txt | 1 + 1 file changed, 1 insertion(+) (limited to 'tools') diff --git a/tools/codespell/ignore-words.txt b/tools/codespell/ignore-words.txt index 7ce778fab..0b1aa284a 100644 --- a/tools/codespell/ignore-words.txt +++ b/tools/codespell/ignore-words.txt @@ -6,6 +6,7 @@ fro hsi inout mot +ore pris ptd ser -- cgit v1.3.1