Fix impementation of STALL_EP0().

Error discovered by @VioletEternity. The new implementation follows the TRM exactly.
whitequark · Aug 4, 2023 · 8251388 · 8251388
1 parent 82d1541
commit 8251388
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/firmware/library/include/fx2usb.h b/firmware/library/include/fx2usb.h
@@ -74,7 +74,7 @@ void usb_init(bool disconnect);
  * Indicate an error in response to a EP0 transfer.
  */
 #define STALL_EP0() \
-  do { EP0CS = _STALL; } while(0)
+  do { EP0CS = _STALL; EP0CS = _HSNAK; } while(0)
 
 /**
  * Return a EPnCS register for given USB endpoint index, or 0