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dwc2 flush tx,rx fifo in dcd_init()

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hathach 2023-10-31 11:53:40 +07:00
parent 6ab7875aab
commit 214a4afa6a
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1 changed files with 8 additions and 0 deletions
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8
src/portable/synopsys/dwc2/dcd_dwc2.c
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@ -447,6 +447,14 @@ void dcd_init(uint8_t rhport) {
// (non zero-length packet), send STALL back and discard.
dwc2->dcfg |= DCFG_NZLSOHSK;
// flush all TX fifo and wait for it cleared
dwc2->grstctl = GRSTCTL_TXFFLSH | (0x10u << GRSTCTL_TXFNUM_Pos);
while (dwc2->grstctl & GRSTCTL_TXFFLSH_Msk) {}
// flush RX fifo and wait for it cleared
dwc2->grstctl = GRSTCTL_RXFFLSH;
while (dwc2->grstctl & GRSTCTL_RXFFLSH_Msk) {}
// Clear all interrupts
uint32_t int_mask = dwc2->gintsts;
dwc2->gintsts |= int_mask;