diff --git a/.idea/cmake.xml b/.idea/cmake.xml
index 432e44172..3cb883e62 100644
--- a/.idea/cmake.xml
+++ b/.idea/cmake.xml
@@ -80,7 +80,7 @@
       <configuration PROFILE_NAME="ra6m5 PORT0" ENABLED="false" CONFIG_NAME="Debug" GENERATION_OPTIONS="-DBOARD=ra6m5_ek -DLOG=3 -DLOGGER=RTT -DTRACE_ETM=1 -DPORT=0" />
       <configuration PROFILE_NAME="uno_r4" ENABLED="false" CONFIG_NAME="Debug" GENERATION_OPTIONS="-DBOARD=uno_r4 -DLOG=4 -DLOGGER=RTT" />
       <configuration PROFILE_NAME="portenta_c33" ENABLED="false" CONFIG_NAME="Debug" GENERATION_OPTIONS="-DBOARD=portenta_c33 -DLOG=3" />
-      <configuration PROFILE_NAME="lpcxpresso1769" ENABLED="true" CONFIG_NAME="Debug" GENERATION_OPTIONS="-DBOARD=lpcxpresso1769 -DLOG=3 -DLOGGER=RTT" />
+      <configuration PROFILE_NAME="lpcxpresso1769" ENABLED="false" CONFIG_NAME="Debug" GENERATION_OPTIONS="-DBOARD=lpcxpresso1769 -DLOG=3 -DLOGGER=RTT" />
     </configurations>
   </component>
 </project>
\ No newline at end of file
diff --git a/src/class/cdc/cdc_host.c b/src/class/cdc/cdc_host.c
index d46bfecb4..38b3de9ea 100644
--- a/src/class/cdc/cdc_host.c
+++ b/src/class/cdc/cdc_host.c
@@ -2,7 +2,6 @@
  * The MIT License (MIT)
  *
  * Copyright (c) 2019 Ha Thach (tinyusb.org)
- * Copyright (c) 2023 IngHK Heiko Kuester
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -23,6 +22,9 @@
  * THE SOFTWARE.
  *
  * This file is part of the TinyUSB stack.
+ *
+ * Contribution
+ * - Heiko Kuester: CH34x support
  */
 
 #include "tusb_option.h"
@@ -95,9 +97,9 @@ static bool acm_set_baudrate(cdch_interface_t* p_cdc, uint32_t baudrate, tuh_xfe
 #if CFG_TUH_CDC_FTDI
 #include "serial/ftdi_sio.h"
 
-static uint16_t const ftdi_pids[] = { CFG_TUH_CDC_FTDI_PID_LIST };
+static uint16_t const ftdi_vid_pid_list[][2] = {CFG_TUH_CDC_FTDI_VID_PID_LIST };
 enum {
-  FTDI_PID_COUNT = sizeof(ftdi_pids) / sizeof(ftdi_pids[0])
+  FTDI_PID_COUNT = TU_ARRAY_SIZE(ftdi_vid_pid_list)
 };
 
 static bool ftdi_open(uint8_t daddr, const tusb_desc_interface_t *itf_desc, uint16_t max_len);
@@ -112,9 +114,9 @@ static bool ftdi_sio_set_baudrate(cdch_interface_t* p_cdc, uint32_t baudrate, tu
 #if CFG_TUH_CDC_CP210X
 #include "serial/cp210x.h"
 
-static uint16_t const cp210x_pids[] = { CFG_TUH_CDC_CP210X_PID_LIST };
+static uint16_t const cp210x_vid_pid_list[][2] = {CFG_TUH_CDC_CP210X_VID_PID_LIST };
 enum {
-  CP210X_PID_COUNT = sizeof(cp210x_pids) / sizeof(cp210x_pids[0])
+  CP210X_PID_COUNT = TU_ARRAY_SIZE(cp210x_vid_pid_list)
 };
 
 static bool cp210x_open(uint8_t daddr, tusb_desc_interface_t const *itf_desc, uint16_t max_len);
@@ -129,9 +131,9 @@ static bool cp210x_set_baudrate(cdch_interface_t* p_cdc, uint32_t baudrate, tuh_
 #if CFG_TUH_CDC_CH34X
 #include "serial/ch34x.h"
 
-static uint16_t const ch34x_vids_pids[][2] = { CFG_TUH_CDC_CH34X_VID_PID_LIST };
+static uint16_t const ch34x_vid_pid_list[][2] = { CFG_TUH_CDC_CH34X_VID_PID_LIST };
 enum {
-  CH34X_VID_PID_COUNT = sizeof ( ch34x_vids_pids ) / sizeof ( ch34x_vids_pids[0] )
+  CH34X_VID_PID_COUNT = TU_ARRAY_SIZE(ch34x_vid_pid_list)
 };
 
 static bool ch34x_open ( uint8_t daddr, tusb_desc_interface_t const *itf_desc, uint16_t max_len );
@@ -692,28 +694,24 @@ bool cdch_open(uint8_t rhport, uint8_t daddr, tusb_desc_interface_t const *itf_d
     TU_VERIFY(tuh_vid_pid_get(daddr, &vid, &pid));
 
     #if CFG_TUH_CDC_FTDI
-    if (TU_FTDI_VID == vid) {
-      for (size_t i = 0; i < FTDI_PID_COUNT; i++) {
-        if (ftdi_pids[i] == pid) {
-          return ftdi_open(daddr, itf_desc, max_len);
-        }
+    for (size_t i = 0; i < FTDI_PID_COUNT; i++) {
+      if (ftdi_vid_pid_list[i][0] == vid && ftdi_vid_pid_list[i][1] == pid) {
+        return ftdi_open(daddr, itf_desc, max_len);
       }
     }
     #endif
 
     #if CFG_TUH_CDC_CP210X
-    if (TU_CP210X_VID == vid) {
-      for (size_t i = 0; i < CP210X_PID_COUNT; i++) {
-        if (cp210x_pids[i] == pid) {
-          return cp210x_open(daddr, itf_desc, max_len);
-        }
+    for (size_t i = 0; i < CP210X_PID_COUNT; i++) {
+      if (cp210x_vid_pid_list[i][0] == vid && cp210x_vid_pid_list[i][1] == pid) {
+        return cp210x_open(daddr, itf_desc, max_len);
       }
     }
     #endif
 
     #if CFG_TUH_CDC_CH34X
     for (size_t i = 0; i < CH34X_VID_PID_COUNT; i++) {
-      if ( ch34x_vids_pids[i][0] == vid && ch34x_vids_pids[i][1] == pid ) {
+      if ( ch34x_vid_pid_list[i][0] == vid && ch34x_vid_pid_list[i][1] == pid ) {
         return ch34x_open(daddr, itf_desc, max_len);
       }
     }
diff --git a/src/class/cdc/serial/ch34x.h b/src/class/cdc/serial/ch34x.h
index 262e012fd..eaa53b367 100644
--- a/src/class/cdc/serial/ch34x.h
+++ b/src/class/cdc/serial/ch34x.h
@@ -1,7 +1,7 @@
 /*
  * The MIT License (MIT)
  *
- * Copyright (c) 2023 IngHK Heiko Kuester (tinyusb.org)
+ * Copyright (c) 2023 Heiko Kuester (tinyusb.org)
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
diff --git a/src/common/tusb_common.h b/src/common/tusb_common.h
index caeb5f2ef..1f08ce4ed 100644
--- a/src/common/tusb_common.h
+++ b/src/common/tusb_common.h
@@ -37,6 +37,7 @@
 #define TU_ARRAY_SIZE(_arr)   ( sizeof(_arr) / sizeof(_arr[0]) )
 #define TU_MIN(_x, _y)        ( ( (_x) < (_y) ) ? (_x) : (_y) )
 #define TU_MAX(_x, _y)        ( ( (_x) > (_y) ) ? (_x) : (_y) )
+#define TU_DIV_CEIL(n, d)     (((n) + (d) - 1) / (d))
 
 #define TU_U16(_high, _low)   ((uint16_t) (((_high) << 8) | (_low)))
 #define TU_U16_HIGH(_u16)     ((uint8_t) (((_u16) >> 8) & 0x00ff))
diff --git a/src/tusb_option.h b/src/tusb_option.h
index 13151a07b..ae7ac2da4 100644
--- a/src/tusb_option.h
+++ b/src/tusb_option.h
@@ -453,10 +453,12 @@
   #define CFG_TUH_CDC_FTDI 0
 #endif
 
-#ifndef CFG_TUH_CDC_FTDI_PID_LIST
-  // List of product IDs that can use the FTDI CDC driver
-  #define CFG_TUH_CDC_FTDI_PID_LIST \
-    0x6001, 0x6006, 0x6010, 0x6011, 0x6014, 0x6015, 0x8372, 0xFBFA, 0xCD18
+#ifndef CFG_TUH_CDC_FTDI_VID_PID_LIST
+  // List of product IDs that can use the FTDI CDC driver. 0x0403 is FTDI's VID
+  #define CFG_TUH_CDC_FTDI_VID_PID_LIST \
+    {0x0403, 0x6001}, {0x0403, 0x6006}, {0x0403, 0x6010}, {0x0403, 0x6011}, \
+    {0x0403, 0x6014}, {0x0403, 0x6015}, {0x0403, 0x8372}, {0x0403, 0xFBFA}, \
+    {0x0403, 0xCD18}
 #endif
 
 #ifndef CFG_TUH_CDC_CP210X
@@ -464,10 +466,10 @@
   #define CFG_TUH_CDC_CP210X 0
 #endif
 
-#ifndef CFG_TUH_CDC_CP210X_PID_LIST
-  // List of product IDs that can use the CP210X CDC driver
-  #define CFG_TUH_CDC_CP210X_PID_LIST \
-    0xEA60, 0xEA70
+#ifndef CFG_TUH_CDC_CP210X_VID_PID_LIST
+  // List of product IDs that can use the CP210X CDC driver. 0x10C4 is Silicon Labs' VID
+  #define CFG_TUH_CDC_CP210X_VID_PID_LIST \
+    {0x10C4, 0xEA60}, {0x10C4, 0xEA70}
 #endif
 
 #ifndef CFG_TUH_CDC_CH34X
@@ -483,8 +485,8 @@
     { 0x1a86, 0x5523 }, /* ch341 chip */ \
     { 0x1a86, 0xe523 }, /* ch330 chip */ \
     { 0x4348, 0x5523 }, /* ch340 custom chip */ \
-    { 0x2184, 0x0057 }, /* overtaken from Linux driver /drivers/usb/serial/ch341.c */ \
-    { 0x9986, 0x7523 }  /* overtaken from Linux driver /drivers/usb/serial/ch341.c */
+    { 0x2184, 0x0057 }, /* overtaken from Linux Kernel driver /drivers/usb/serial/ch341.c */ \
+    { 0x9986, 0x7523 }  /* overtaken from Linux Kernel driver /drivers/usb/serial/ch341.c */
 #endif
 
 #ifndef CFG_TUH_HID