mirror/tinyusb
1
0
Fork 0
mirror of https://github.com/hathach/tinyusb.git synced 2025-03-31 07:20:23 +00:00
Code Issues Packages Projects Releases Wiki Activity

dwc2 flush tx,rx fifo in dcd_init()

Browse Source
This commit is contained in:
hathach 2023-10-31 11:53:40 +07:00
parent 6ab7875aab
commit 214a4afa6a
No known key found for this signature in database
GPG Key ID: F5D50C6D51D17CBA
1 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/portable/synopsys/dwc2/dcd_dwc2.c
View File

@ -447,6 +447,14 @@ void dcd_init(uint8_t rhport) {
// (non zero-length packet), send STALL back and discard. // (non zero-length packet), send STALL back and discard.
dwc2->dcfg |= DCFG_NZLSOHSK; 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 // Clear all interrupts
uint32_t int_mask = dwc2->gintsts; uint32_t int_mask = dwc2->gintsts;
dwc2->gintsts |= int_mask; dwc2->gintsts |= int_mask;