From 8c0388f477839810260f578922f17a5197294cc1 Mon Sep 17 00:00:00 2001
From: Simon Kueppers <simon.kueppers@skueppers.de>
Date: Mon, 24 Oct 2022 22:39:38 +0200
Subject: [PATCH] Fixed wrongly enabling RX and TX status simultaneously on
 ISOCHRONOUS endpoints

---
 src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
index 73fecb750..d2fefde82 100644
--- a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
+++ b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
@@ -818,12 +818,6 @@ bool dcd_edpt_open (uint8_t rhport, tusb_desc_endpoint_t const * p_endpoint_desc
     *pcd_ep_tx_address_ptr(USB, epnum) = pma_addr;
     pcd_set_ep_tx_cnt(USB, epnum, epMaxPktSize);
     pcd_clear_tx_dtog(USB, epnum);
-
-    if(wType == USB_EP_ISOCHRONOUS) {
-      pcd_set_ep_tx_status(USB, epnum, USB_EP_TX_DIS);
-    } else {
-      pcd_set_ep_tx_status(USB, epnum, USB_EP_TX_NAK);
-    }
   }
 #if defined(ISOCHRONOUS_DOUBLEBUFFER)
   if( (dir == TUSB_DIR_OUT) || (wType == USB_EP_ISOCHRONOUS) )
@@ -834,7 +828,18 @@ bool dcd_edpt_open (uint8_t rhport, tusb_desc_endpoint_t const * p_endpoint_desc
     *pcd_ep_rx_address_ptr(USB, epnum) = pma_addr;
     pcd_set_ep_rx_cnt(USB, epnum, epMaxPktSize);
     pcd_clear_rx_dtog(USB, epnum);
+  }
 
+  /* Enable endpoint */
+  if (dir == TUSB_DIR_IN)
+  {
+    if(wType == USB_EP_ISOCHRONOUS) {
+      pcd_set_ep_tx_status(USB, epnum, USB_EP_TX_DIS);
+    } else {
+      pcd_set_ep_tx_status(USB, epnum, USB_EP_TX_NAK);
+    }
+  } else
+  {
     if(wType == USB_EP_ISOCHRONOUS) {
       pcd_set_ep_rx_status(USB, epnum, USB_EP_RX_DIS);
     } else {