From 849ea98853346a1fbdef333c22c7050df42a0c36 Mon Sep 17 00:00:00 2001
From: ovo <40362261+saisesai@users.noreply.github.com>
Date: Sun, 26 Nov 2023 16:30:40 +0800
Subject: [PATCH] bugfix: send zlp won't trigger ep tx interrupt

---
 port/musb/usb_dc_musb.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/port/musb/usb_dc_musb.c b/port/musb/usb_dc_musb.c
index 10851efd..28e4af24 100644
--- a/port/musb/usb_dc_musb.c
+++ b/port/musb/usb_dc_musb.c
@@ -649,6 +649,7 @@ int usbd_ep_start_write(const uint8_t ep, const uint8_t *data, uint32_t data_len
             HWREGB(USB_BASE + MUSB_IND_TXCSRL_OFFSET) = (USB_CSRL0_TXRDY | USB_CSRL0_DATAEND);
         } else {
             HWREGB(USB_BASE + MUSB_IND_TXCSRL_OFFSET) = USB_TXCSRL1_TXRDY;
+            HWREGH(USB_BASE + MUSB_TXIE_OFFSET) |= (1 << ep_idx);
         }
         musb_set_active_ep(old_ep_idx);
         return 0;