diff --git a/examples/build_system/make/make.mk b/examples/build_system/make/make.mk
index e1113aa52..772befca4 100644
--- a/examples/build_system/make/make.mk
+++ b/examples/build_system/make/make.mk
@@ -113,6 +113,7 @@ CFLAGS += -DBOARD_$(BOARD_UPPER)
 ifeq (${MAX3421_HOST},1)
   SRC_C += src/portable/analog/max3421/hcd_max3421.c
   CFLAGS += -DCFG_TUH_MAX3421=1
+  CMAKE_DEFSYM +=	-DMAX3421_HOST=1
 endif
 
 # Log level is mapped to TUSB DEBUG option
diff --git a/examples/host/cdc_msc_hid_freertos/skip.txt b/examples/host/cdc_msc_hid_freertos/skip.txt
new file mode 100644
index 000000000..2ba4438fd
--- /dev/null
+++ b/examples/host/cdc_msc_hid_freertos/skip.txt
@@ -0,0 +1 @@
+mcu:RP2040
diff --git a/hw/bsp/family_support.cmake b/hw/bsp/family_support.cmake
index d84077ed8..4ccd6e4f2 100644
--- a/hw/bsp/family_support.cmake
+++ b/hw/bsp/family_support.cmake
@@ -79,17 +79,27 @@ set(WARNING_FLAGS_IAR "")
 function(family_filter RESULT DIR)
   get_filename_component(DIR ${DIR} ABSOLUTE BASE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
 
-  if (EXISTS "${DIR}/only.txt")
-    file(READ "${DIR}/only.txt" ONLYS)
-    # Replace newlines with semicolon so that it is treated as a list by CMake
-    string(REPLACE "\n" ";" ONLYS_LINES ${ONLYS})
+  if (EXISTS "${DIR}/skip.txt")
+    file(STRINGS "${DIR}/skip.txt" SKIPS_LINES)
+    foreach(MCU IN LISTS FAMILY_MCUS)
+      # For each line in only.txt
+      foreach(_line ${SKIPS_LINES})
+        # If mcu:xxx exists for this mcu then skip
+        if (${_line} STREQUAL "mcu:${MCU}" OR ${_line} STREQUAL "board:${BOARD}" OR ${_line} STREQUAL "family:${FAMILY}")
+          set(${RESULT} 0 PARENT_SCOPE)
+          return()
+        endif()
+      endforeach()
+    endforeach()
+  endif ()
 
-    # For each mcu
+  if (EXISTS "${DIR}/only.txt")
+    file(STRINGS "${DIR}/only.txt" ONLYS_LINES)
     foreach(MCU IN LISTS FAMILY_MCUS)
       # For each line in only.txt
       foreach(_line ${ONLYS_LINES})
         # If mcu:xxx exists for this mcu or board:xxx then include
-        if (${_line} STREQUAL "mcu:${MCU}" OR ${_line} STREQUAL "board:${BOARD}")
+        if (${_line} STREQUAL "mcu:${MCU}" OR ${_line} STREQUAL "board:${BOARD}" OR ${_line} STREQUAL "family:${FAMILY}")
           set(${RESULT} 1 PARENT_SCOPE)
           return()
         endif()
@@ -98,29 +108,8 @@ function(family_filter RESULT DIR)
 
     # Didn't find it in only file so don't build
     set(${RESULT} 0 PARENT_SCOPE)
-
-  elseif (EXISTS "${DIR}/skip.txt")
-    file(READ "${DIR}/skip.txt" SKIPS)
-    # Replace newlines with semicolon so that it is treated as a list by CMake
-    string(REPLACE "\n" ";" SKIPS_LINES ${SKIPS})
-
-    # For each mcu
-    foreach(MCU IN LISTS FAMILY_MCUS)
-      # For each line in only.txt
-      foreach(_line ${SKIPS_LINES})
-        # If mcu:xxx exists for this mcu then skip
-        if (${_line} STREQUAL "mcu:${MCU}")
-          set(${RESULT} 0 PARENT_SCOPE)
-          return()
-        endif()
-      endforeach()
-    endforeach()
-
-    # Didn't find in skip file so build
-    set(${RESULT} 1 PARENT_SCOPE)
   else()
-
-    # Didn't find skip or only file so build
+    # only.txt not exist so build
     set(${RESULT} 1 PARENT_SCOPE)
   endif()
 endfunction()
diff --git a/hw/bsp/rp2040/boards/feather_rp2040_max3421/board.cmake b/hw/bsp/rp2040/boards/feather_rp2040_max3421/board.cmake
new file mode 100644
index 000000000..b8e5890f3
--- /dev/null
+++ b/hw/bsp/rp2040/boards/feather_rp2040_max3421/board.cmake
@@ -0,0 +1,4 @@
+set(PICO_BOARD adafruit_feather_rp2040)
+
+# Enable MAX3421E USB Host
+set(MAX3421_HOST 1)
diff --git a/src/portable/analog/max3421/hcd_max3421.c b/src/portable/analog/max3421/hcd_max3421.c
index 242c65501..059f674cd 100644
--- a/src/portable/analog/max3421/hcd_max3421.c
+++ b/src/portable/analog/max3421/hcd_max3421.c
@@ -654,7 +654,7 @@ static void xact_generic(uint8_t rhport, max3421_ep_t *ep, bool switch_ep, bool
 
     // status
     if (ep->buf == NULL || ep->total_len == 0) {
-      uint8_t const hxfr = HXFR_HS | (ep->hxfr_bm.is_out ? HXFR_OUT_NIN : 0);
+      uint8_t const hxfr = (uint8_t) (HXFR_HS | (ep->hxfr & HXFR_OUT_NIN));
       peraddr_write(rhport, ep->daddr, in_isr);
       hxfr_write(rhport, hxfr, in_isr);
       return;
@@ -676,19 +676,18 @@ bool hcd_edpt_xfer(uint8_t rhport, uint8_t daddr, uint8_t ep_addr, uint8_t * buf
   max3421_ep_t* ep = find_opened_ep(daddr, ep_num, ep_dir);
   TU_VERIFY(ep);
 
-  // control transfer can switch direction
-  ep->hxfr_bm.is_out = ep_dir ? 0u : 1u;
+  if (ep_num == 0) {
+    // control transfer can switch direction
+    ep->hxfr_bm.is_out = ep_dir ? 0 : 1;
+    ep->hxfr_bm.is_setup = 0;
+    ep->data_toggle = 1;
+  }
 
   ep->buf = buffer;
   ep->total_len = buflen;
   ep->xferred_len = 0;
   ep->state = EP_STATE_ATTEMPT_1;
 
-  if (ep_num == 0) {
-    ep->hxfr_bm.is_setup = 0;
-    ep->data_toggle = 1;
-  }
-
   // carry out transfer if not busy
   if (!atomic_flag_test_and_set(&_hcd_data.busy)) {
     xact_generic(rhport, ep, true, false);
diff --git a/tools/build_utils.py b/tools/build_utils.py
index 5d735bc17..b66b64b97 100644
--- a/tools/build_utils.py
+++ b/tools/build_utils.py
@@ -64,18 +64,19 @@ def skip_example(example, board):
     skip_file = ex_dir / "skip.txt"
     only_file = ex_dir / "only.txt"
 
-    if skip_file.exists() and only_file.exists():
-        raise RuntimeError("Only have a skip or only file. Not both.")
-    elif skip_file.exists():
+    if skip_file.exists():
         skips = skip_file.read_text().split()
-        return ("mcu:" + mcu in skips or
-                "board:" + board in skips or
-                "family:" + family in skips)
-    elif only_file.exists():
+        if ("mcu:" + mcu in skips or
+            "board:" + board in skips or
+            "family:" + family in skips):
+            return True
+
+    if only_file.exists():
         onlys = only_file.read_text().split()
-        return not ("mcu:" + mcu in onlys or
-                    "board:" + board in onlys or
-                    "family:" + family in onlys)
+        if not ("mcu:" + mcu in onlys or
+                "board:" + board in onlys or
+                "family:" + family in onlys):
+            return True
 
     return False