diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/portable/synopsys/dwc2/dcd_dwc2.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/src/portable/synopsys/dwc2/dcd_dwc2.c b/src/portable/synopsys/dwc2/dcd_dwc2.c index 69d96aff0..d01d9645b 100644 --- a/src/portable/synopsys/dwc2/dcd_dwc2.c +++ b/src/portable/synopsys/dwc2/dcd_dwc2.c @@ -154,9 +154,11 @@ static bool fifo_alloc(uint8_t rhport, uint8_t ep_addr, uint16_t packet_size) { dwc2->grxfsiz = sz; } } else { - // The fifo-empty interrupt fires when the interrupt is half empty. In order + // Note if The TXFELVL is configured as half empty. In order // to be able to write a packet at that point, the fifo must be twice the max_size. - fifo_size = fifo_size * 2; + if ((dwc2->gahbcfg & GAHBCFG_TXFELVL) == 0) { + fifo_size *= 2; + } // Check if free space is available TU_ASSERT(_allocated_fifo_words_tx + fifo_size + dwc2->grxfsiz <= _dwc2_controller[rhport].ep_fifo_size / 4); @@ -596,13 +598,13 @@ void dcd_init(uint8_t rhport) { int_mask = dwc2->gotgint; dwc2->gotgint |= int_mask; - // Configure TX FIFO to set the TX FIFO empty interrupt when half-empty - dwc2->gahbcfg &= ~GAHBCFG_TXFELVL; - // Required as part of core initialization. dwc2->gintmsk = GINTMSK_OTGINT | GINTMSK_RXFLVLM | GINTMSK_USBSUSPM | GINTMSK_USBRST | GINTMSK_ENUMDNEM | GINTMSK_WUIM; + // Configure TX FIFO empty level for interrupt. Default is complete empty + dwc2->gahbcfg |= GAHBCFG_TXFELVL; + // Enable global interrupt dwc2->gahbcfg |= GAHBCFG_GINT; |