feat(dcd/dwc2): Add Periodic Transfer Interrupt feature - #84
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Enable DCTL.IgnrFrmNum in Buffer DMA so ISOC endpoints can be armed without even/odd frame matching. This is required to schedule ISOC OUT on alternating 7/8 ms intervals (Bluetooth HCI 7.5 ms) while keeping bInterval = 1. Gated by CFG_TUD_DWC2_PTI_ENABLE (default off, DMA only). When on, mask IncompISOCIN and report dropped ISOC OUT (PktDrpSts) as a failed transfer.
Hardware-in-the-loop (HIL) Test ReportNo HIL run for this push (no affected boards, or hardware testing did not run). |
peter-marcisovsky
approved these changes
Sep 2, 2026
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DWC2 DCD: Periodic Transfer Interrupt feature
Enable DCTL.IgnrFrmNum in Buffer DMA so ISOC endpoints can be armed without even/odd frame matching.
This is required to schedule ISOC OUT on alternating 7/8 ms intervals (Bluetooth HCI 7.5 ms) while keeping bInterval = 1.
Gated by CFG_TUD_DWC2_PTI_ENABLE (default off, DMA only). When on, mask IncompISOCIN and report dropped ISOC OUT (PktDrpSts) as a failed transfer.
Upstream PR hathach#3859