From e9aa36a6e8991335d72666058f9c135c3331d238 Mon Sep 17 00:00:00 2001 From: Jerzy Kasenberg Date: Fri, 31 Jul 2020 16:04:10 +0200 Subject: [PATCH] Fix synopsys odd/even frame bit for IN ISO endpoints For ISO endpoint driver has to specify when data is to be transmitted (odd or even frame). Currently code was not updating this bit resulting in data being sent every other frame. If interval was 1ms full data packed was sent every 2ms, and ZLP was sent in between. --- src/portable/st/synopsys/dcd_synopsys.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/src/portable/st/synopsys/dcd_synopsys.c b/src/portable/st/synopsys/dcd_synopsys.c index 03c33c598..283fefd01 100644 --- a/src/portable/st/synopsys/dcd_synopsys.c +++ b/src/portable/st/synopsys/dcd_synopsys.c @@ -365,6 +365,13 @@ static void edpt_schedule_packets(uint8_t rhport, uint8_t const epnum, uint8_t c ((total_bytes << USB_OTG_DIEPTSIZ_XFRSIZ_Pos) & USB_OTG_DIEPTSIZ_XFRSIZ_Msk); in_ep[epnum].DIEPCTL |= USB_OTG_DIEPCTL_EPENA | USB_OTG_DIEPCTL_CNAK; + // For ISO endpoint set correct odd/even bit for next frame. + if ((in_ep[epnum].DIEPCTL & USB_OTG_DIEPCTL_EPTYP) == USB_OTG_DIEPCTL_EPTYP_0) + { + // Take odd/even bit from frame counter. + uint32_t const odd_frame_now = (dev->DSTS & (1u << USB_OTG_DSTS_FNSOF_Pos)); + in_ep[epnum].DIEPCTL |= (odd_frame_now ? USB_OTG_DIEPCTL_SD0PID_SEVNFRM_Msk : USB_OTG_DIEPCTL_SODDFRM_Msk); + } // Enable fifo empty interrupt only if there are something to put in the fifo. if(total_bytes != 0) { dev->DIEPEMPMSK |= (1 << epnum);