Documentation-related fixes.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@8676 35acf78f-673a-0410-8e92-d51de3d6d3f4

60 files changed, 60 insertions, 60 deletions

diff --git a/demos/AVR/NIL-ARDUINOMEGA/halconf.h b/demos/AVR/NIL-ARDUINOMEGA/halconf.h
index b25bef05a..88c58350a 100644
--- a/demos/AVR/NIL-ARDUINOMEGA/halconf.h
+++ b/demos/AVR/NIL-ARDUINOMEGA/halconf.h
@@ -316,7 +316,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/AVR/NIL-ARDUINOUNO/halconf.h b/demos/AVR/NIL-ARDUINOUNO/halconf.h
index b25bef05a..88c58350a 100644
--- a/demos/AVR/NIL-ARDUINOUNO/halconf.h
+++ b/demos/AVR/NIL-ARDUINOUNO/halconf.h
@@ -316,7 +316,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/AVR/RT-ARDUINOMEGA/halconf.h b/demos/AVR/RT-ARDUINOMEGA/halconf.h
index b25bef05a..88c58350a 100644
--- a/demos/AVR/RT-ARDUINOMEGA/halconf.h
+++ b/demos/AVR/RT-ARDUINOMEGA/halconf.h
@@ -316,7 +316,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/AVR/RT-ARDUINOUNO/halconf.h b/demos/AVR/RT-ARDUINOUNO/halconf.h
index b25bef05a..88c58350a 100644
--- a/demos/AVR/RT-ARDUINOUNO/halconf.h
+++ b/demos/AVR/RT-ARDUINOUNO/halconf.h
@@ -316,7 +316,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/KINETIS/RT-FREEDOM-K20D50M-EXT/halconf.h b/demos/KINETIS/RT-FREEDOM-K20D50M-EXT/halconf.h
index c5c4f42c8..70dd600aa 100644
--- a/demos/KINETIS/RT-FREEDOM-K20D50M-EXT/halconf.h
+++ b/demos/KINETIS/RT-FREEDOM-K20D50M-EXT/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/KINETIS/RT-FREEDOM-K20D50M/halconf.h b/demos/KINETIS/RT-FREEDOM-K20D50M/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/KINETIS/RT-FREEDOM-K20D50M/halconf.h
+++ b/demos/KINETIS/RT-FREEDOM-K20D50M/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/KINETIS/RT-FREEDOM-KL25Z-EXT/halconf.h b/demos/KINETIS/RT-FREEDOM-KL25Z-EXT/halconf.h
index cc9a6fca6..9c99a2b09 100644
--- a/demos/KINETIS/RT-FREEDOM-KL25Z-EXT/halconf.h
+++ b/demos/KINETIS/RT-FREEDOM-KL25Z-EXT/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/KINETIS/RT-FREEDOM-KL25Z/halconf.h b/demos/KINETIS/RT-FREEDOM-KL25Z/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/KINETIS/RT-FREEDOM-KL25Z/halconf.h
+++ b/demos/KINETIS/RT-FREEDOM-KL25Z/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/KINETIS/RT-MCHCK-K20-GPT/halconf.h b/demos/KINETIS/RT-MCHCK-K20-GPT/halconf.h
index f1940294f..e76bb7f22 100644
--- a/demos/KINETIS/RT-MCHCK-K20-GPT/halconf.h
+++ b/demos/KINETIS/RT-MCHCK-K20-GPT/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/KINETIS/RT-MCHCK-K20-SPI/halconf.h b/demos/KINETIS/RT-MCHCK-K20-SPI/halconf.h
index 7b8a8cf78..2771cf869 100644
--- a/demos/KINETIS/RT-MCHCK-K20-SPI/halconf.h
+++ b/demos/KINETIS/RT-MCHCK-K20-SPI/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/KINETIS/RT-TEENSY3/halconf.h b/demos/KINETIS/RT-TEENSY3/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/KINETIS/RT-TEENSY3/halconf.h
+++ b/demos/KINETIS/RT-TEENSY3/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/LPC21xx/RT-LPC214x-OLIMEX/halconf.h b/demos/LPC21xx/RT-LPC214x-OLIMEX/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/LPC21xx/RT-LPC214x-OLIMEX/halconf.h
+++ b/demos/LPC21xx/RT-LPC214x-OLIMEX/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/SPC5/NIL-SPC560D-EVB/halconf.h b/demos/SPC5/NIL-SPC560D-EVB/halconf.h
index 8ac6abde0..2975e2750 100644
--- a/demos/SPC5/NIL-SPC560D-EVB/halconf.h
+++ b/demos/SPC5/NIL-SPC560D-EVB/halconf.h
@@ -316,7 +316,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/SPC5/RT-SPC560B-EVB/halconf.h b/demos/SPC5/RT-SPC560B-EVB/halconf.h
index 8ac6abde0..2975e2750 100644
--- a/demos/SPC5/RT-SPC560B-EVB/halconf.h
+++ b/demos/SPC5/RT-SPC560B-EVB/halconf.h
@@ -316,7 +316,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/SPC5/RT-SPC560D-EVB/halconf.h b/demos/SPC5/RT-SPC560D-EVB/halconf.h
index 8ac6abde0..2975e2750 100644
--- a/demos/SPC5/RT-SPC560D-EVB/halconf.h
+++ b/demos/SPC5/RT-SPC560D-EVB/halconf.h
@@ -316,7 +316,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/SPC5/RT-SPC560P-EVB/halconf.h b/demos/SPC5/RT-SPC560P-EVB/halconf.h
index 8ac6abde0..2975e2750 100644
--- a/demos/SPC5/RT-SPC560P-EVB/halconf.h
+++ b/demos/SPC5/RT-SPC560P-EVB/halconf.h
@@ -316,7 +316,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/SPC5/RT-SPC563M-EVB/halconf.h b/demos/SPC5/RT-SPC563M-EVB/halconf.h
index 8ac6abde0..2975e2750 100644
--- a/demos/SPC5/RT-SPC563M-EVB/halconf.h
+++ b/demos/SPC5/RT-SPC563M-EVB/halconf.h
@@ -316,7 +316,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/SPC5/RT-SPC564A-EVB/halconf.h b/demos/SPC5/RT-SPC564A-EVB/halconf.h
index 8ac6abde0..2975e2750 100644
--- a/demos/SPC5/RT-SPC564A-EVB/halconf.h
+++ b/demos/SPC5/RT-SPC564A-EVB/halconf.h
@@ -316,7 +316,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/SPC5/RT-SPC56EC-EVB/halconf.h b/demos/SPC5/RT-SPC56EC-EVB/halconf.h
index 8ac6abde0..2975e2750 100644
--- a/demos/SPC5/RT-SPC56EC-EVB/halconf.h
+++ b/demos/SPC5/RT-SPC56EC-EVB/halconf.h
@@ -316,7 +316,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/SPC5/RT-SPC56EL-EVB/halconf.h b/demos/SPC5/RT-SPC56EL-EVB/halconf.h
index 8ac6abde0..2975e2750 100644
--- a/demos/SPC5/RT-SPC56EL-EVB/halconf.h
+++ b/demos/SPC5/RT-SPC56EL-EVB/halconf.h
@@ -316,7 +316,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/CMSIS-STM32F407-DISCOVERY/halconf.h b/demos/STM32/CMSIS-STM32F407-DISCOVERY/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/CMSIS-STM32F407-DISCOVERY/halconf.h
+++ b/demos/STM32/CMSIS-STM32F407-DISCOVERY/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/HAL-STM32F407-DISCOVERY/halconf.h b/demos/STM32/HAL-STM32F407-DISCOVERY/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/HAL-STM32F407-DISCOVERY/halconf.h
+++ b/demos/STM32/HAL-STM32F407-DISCOVERY/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/NIL-STM32F051-DISCOVERY/halconf.h b/demos/STM32/NIL-STM32F051-DISCOVERY/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/NIL-STM32F051-DISCOVERY/halconf.h
+++ b/demos/STM32/NIL-STM32F051-DISCOVERY/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/NIL-STM32F100-DISCOVERY/halconf.h b/demos/STM32/NIL-STM32F100-DISCOVERY/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/NIL-STM32F100-DISCOVERY/halconf.h
+++ b/demos/STM32/NIL-STM32F100-DISCOVERY/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/NIL-STM32F303-DISCOVERY/halconf.h b/demos/STM32/NIL-STM32F303-DISCOVERY/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/NIL-STM32F303-DISCOVERY/halconf.h
+++ b/demos/STM32/NIL-STM32F303-DISCOVERY/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/NIL-STM32F373-STM32373C_EVAL/halconf.h b/demos/STM32/NIL-STM32F373-STM32373C_EVAL/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/NIL-STM32F373-STM32373C_EVAL/halconf.h
+++ b/demos/STM32/NIL-STM32F373-STM32373C_EVAL/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/NIL-STM32L152-DISCOVERY/halconf.h b/demos/STM32/NIL-STM32L152-DISCOVERY/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/NIL-STM32L152-DISCOVERY/halconf.h
+++ b/demos/STM32/NIL-STM32L152-DISCOVERY/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F030R8-NUCLEO/halconf.h b/demos/STM32/RT-STM32F030R8-NUCLEO/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F030R8-NUCLEO/halconf.h
+++ b/demos/STM32/RT-STM32F030R8-NUCLEO/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F031K6-NUCLEO32/halconf.h b/demos/STM32/RT-STM32F031K6-NUCLEO32/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F031K6-NUCLEO32/halconf.h
+++ b/demos/STM32/RT-STM32F031K6-NUCLEO32/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F042K6-NUCLEO32/halconf.h b/demos/STM32/RT-STM32F042K6-NUCLEO32/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F042K6-NUCLEO32/halconf.h
+++ b/demos/STM32/RT-STM32F042K6-NUCLEO32/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F051-DISCOVERY/halconf.h b/demos/STM32/RT-STM32F051-DISCOVERY/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F051-DISCOVERY/halconf.h
+++ b/demos/STM32/RT-STM32F051-DISCOVERY/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F072-DISCOVERY/halconf.h b/demos/STM32/RT-STM32F072-DISCOVERY/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F072-DISCOVERY/halconf.h
+++ b/demos/STM32/RT-STM32F072-DISCOVERY/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F072RB-NUCLEO/halconf.h b/demos/STM32/RT-STM32F072RB-NUCLEO/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F072RB-NUCLEO/halconf.h
+++ b/demos/STM32/RT-STM32F072RB-NUCLEO/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F091RC-NUCLEO/halconf.h b/demos/STM32/RT-STM32F091RC-NUCLEO/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F091RC-NUCLEO/halconf.h
+++ b/demos/STM32/RT-STM32F091RC-NUCLEO/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F100-DISCOVERY/halconf.h b/demos/STM32/RT-STM32F100-DISCOVERY/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F100-DISCOVERY/halconf.h
+++ b/demos/STM32/RT-STM32F100-DISCOVERY/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F103-MAPLEMINI/halconf.h b/demos/STM32/RT-STM32F103-MAPLEMINI/halconf.h
index edb90bd27..a0fc6d4d7 100644
--- a/demos/STM32/RT-STM32F103-MAPLEMINI/halconf.h
+++ b/demos/STM32/RT-STM32F103-MAPLEMINI/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F103-OLIMEX_STM32_P103/halconf.h b/demos/STM32/RT-STM32F103-OLIMEX_STM32_P103/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F103-OLIMEX_STM32_P103/halconf.h
+++ b/demos/STM32/RT-STM32F103-OLIMEX_STM32_P103/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F103-STM3210E_EVAL-FATFS-USB/halconf.h b/demos/STM32/RT-STM32F103-STM3210E_EVAL-FATFS-USB/halconf.h
index 7f2c3ddd5..27b7b530f 100644
--- a/demos/STM32/RT-STM32F103-STM3210E_EVAL-FATFS-USB/halconf.h
+++ b/demos/STM32/RT-STM32F103-STM3210E_EVAL-FATFS-USB/halconf.h
@@ -316,7 +316,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F103RB-NUCLEO/halconf.h b/demos/STM32/RT-STM32F103RB-NUCLEO/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F103RB-NUCLEO/halconf.h
+++ b/demos/STM32/RT-STM32F103RB-NUCLEO/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F103_INEMO_DISCOVERY/halconf.h b/demos/STM32/RT-STM32F103_INEMO_DISCOVERY/halconf.h
index edb90bd27..a0fc6d4d7 100644
--- a/demos/STM32/RT-STM32F103_INEMO_DISCOVERY/halconf.h
+++ b/demos/STM32/RT-STM32F103_INEMO_DISCOVERY/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F207-DISCOVERY/halconf.h b/demos/STM32/RT-STM32F207-DISCOVERY/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F207-DISCOVERY/halconf.h
+++ b/demos/STM32/RT-STM32F207-DISCOVERY/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F302R8-NUCLEO/halconf.h b/demos/STM32/RT-STM32F302R8-NUCLEO/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F302R8-NUCLEO/halconf.h
+++ b/demos/STM32/RT-STM32F302R8-NUCLEO/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F303-DISCOVERY/halconf.h b/demos/STM32/RT-STM32F303-DISCOVERY/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F303-DISCOVERY/halconf.h
+++ b/demos/STM32/RT-STM32F303-DISCOVERY/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F303K8-NUCLEO32/halconf.h b/demos/STM32/RT-STM32F303K8-NUCLEO32/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F303K8-NUCLEO32/halconf.h
+++ b/demos/STM32/RT-STM32F303K8-NUCLEO32/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F334R8-NUCLEO/halconf.h b/demos/STM32/RT-STM32F334R8-NUCLEO/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F334R8-NUCLEO/halconf.h
+++ b/demos/STM32/RT-STM32F334R8-NUCLEO/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F373-STM32373C_EVAL/halconf.h b/demos/STM32/RT-STM32F373-STM32373C_EVAL/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F373-STM32373C_EVAL/halconf.h
+++ b/demos/STM32/RT-STM32F373-STM32373C_EVAL/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F401C-DISCOVERY/halconf.h b/demos/STM32/RT-STM32F401C-DISCOVERY/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F401C-DISCOVERY/halconf.h
+++ b/demos/STM32/RT-STM32F401C-DISCOVERY/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F401RE-NUCLEO/halconf.h b/demos/STM32/RT-STM32F401RE-NUCLEO/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F401RE-NUCLEO/halconf.h
+++ b/demos/STM32/RT-STM32F401RE-NUCLEO/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F407-DISCOVERY-G++/halconf.h b/demos/STM32/RT-STM32F407-DISCOVERY-G++/halconf.h
index caa4a12d9..41c6db2b5 100644
--- a/demos/STM32/RT-STM32F407-DISCOVERY-G++/halconf.h
+++ b/demos/STM32/RT-STM32F407-DISCOVERY-G++/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.
  * @details Configuration parameter, the buffer size must be a multiple of
  *          the USB data endpoint maximum packet size.
- * @note    The default is 16 bytes for both the transmission and receive
+ * @note    The default is 256 bytes for both the transmission and receive
  *          buffers.
  */
 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)
diff --git a/demos/STM32/RT-STM32F407-DISCOVERY-MEMS/halconf.h b/demos/STM32/RT-STM32F407-DISCOVERY-MEMS/halconf.h
index f6499f6d6..bc784cbfc 100644
--- a/demos/STM32/RT-STM32F407-DISCOVERY-MEMS/halconf.h
+++ b/demos/STM32/RT-STM32F407-DISCOVERY-MEMS/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F407-DISCOVERY/halconf.h b/demos/STM32/RT-STM32F407-DISCOVERY/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F407-DISCOVERY/halconf.h
+++ b/demos/STM32/RT-STM32F407-DISCOVERY/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F407-OLIMEX_E407-LWIP-FATFS-USB/halconf.h b/demos/STM32/RT-STM32F407-OLIMEX_E407-LWIP-FATFS-USB/halconf.h
index 7e60dab78..5056fd725 100644
--- a/demos/STM32/RT-STM32F407-OLIMEX_E407-LWIP-FATFS-USB/halconf.h
+++ b/demos/STM32/RT-STM32F407-OLIMEX_E407-LWIP-FATFS-USB/halconf.h
@@ -316,7 +316,7 @@
  * @brief   Serial over USB buffers size.
  * @details Configuration parameter, the buffer size must be a multiple of
  *          the USB data endpoint maximum packet size.
- * @note    The default is 16 bytes for both the transmission and receive
+ * @note    The default is 256 bytes for both the transmission and receive
  *          buffers.
  */
 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)
diff --git a/demos/STM32/RT-STM32F411RE-NUCLEO/halconf.h b/demos/STM32/RT-STM32F411RE-NUCLEO/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F411RE-NUCLEO/halconf.h
+++ b/demos/STM32/RT-STM32F411RE-NUCLEO/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F429-DISCOVERY/halconf.h b/demos/STM32/RT-STM32F429-DISCOVERY/halconf.h
index edb90bd27..a0fc6d4d7 100644
--- a/demos/STM32/RT-STM32F429-DISCOVERY/halconf.h
+++ b/demos/STM32/RT-STM32F429-DISCOVERY/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F746G-DISCOVERY-LWIP-FATFS-USB/halconf.h b/demos/STM32/RT-STM32F746G-DISCOVERY-LWIP-FATFS-USB/halconf.h
index 4e9cec094..86a845bdf 100644
--- a/demos/STM32/RT-STM32F746G-DISCOVERY-LWIP-FATFS-USB/halconf.h
+++ b/demos/STM32/RT-STM32F746G-DISCOVERY-LWIP-FATFS-USB/halconf.h
@@ -316,7 +316,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32F746G-DISCOVERY/halconf.h b/demos/STM32/RT-STM32F746G-DISCOVERY/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32F746G-DISCOVERY/halconf.h
+++ b/demos/STM32/RT-STM32F746G-DISCOVERY/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32L053R8-NUCLEO/halconf.h b/demos/STM32/RT-STM32L053R8-NUCLEO/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32L053R8-NUCLEO/halconf.h
+++ b/demos/STM32/RT-STM32L053R8-NUCLEO/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32L152-DISCOVERY/halconf.h b/demos/STM32/RT-STM32L152-DISCOVERY/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32L152-DISCOVERY/halconf.h
+++ b/demos/STM32/RT-STM32L152-DISCOVERY/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32L152RE-NUCLEO/halconf.h b/demos/STM32/RT-STM32L152RE-NUCLEO/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32L152RE-NUCLEO/halconf.h
+++ b/demos/STM32/RT-STM32L152RE-NUCLEO/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)

diff --git a/demos/STM32/RT-STM32L476RG-NUCLEO/halconf.h b/demos/STM32/RT-STM32L476RG-NUCLEO/halconf.h
index fb56d6a38..ca98c1347 100644
--- a/demos/STM32/RT-STM32L476RG-NUCLEO/halconf.h
+++ b/demos/STM32/RT-STM32L476RG-NUCLEO/halconf.h
@@ -309,7 +309,7 @@
  * @brief   Serial over USB buffers size.

  * @details Configuration parameter, the buffer size must be a multiple of

  *          the USB data endpoint maximum packet size.

- * @note    The default is 16 bytes for both the transmission and receive

+ * @note    The default is 256 bytes for both the transmission and receive

  *          buffers.

  */

 #if !defined(SERIAL_USB_BUFFERS_SIZE) || defined(__DOXYGEN__)