Fix XTAL frequencies for AVR; add ISP mkII connection info

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3698 42af7a65-404d-4744-a932-0658087f49c3

3 files changed, 335 insertions, 187 deletions

diff --git a/nuttx/configs/amber/include/board.h b/nuttx/configs/amber/include/board.h
index 92b260037..745998e97 100755
--- a/nuttx/configs/amber/include/board.h
+++ b/nuttx/configs/amber/include/board.h
@@ -1,93 +1,93 @@
-/****************************************************************************

- * configs/amber/include/board.h

- * include/arch/board/board.h

- *

- *   Copyright (C) 2011 Gregory Nutt. All rights reserved.

- *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

- *

- * Redistribution and use in source and binary forms, with or without

- * modification, are permitted provided that the following conditions

- * are met:

- *

- * 1. Redistributions of source code must retain the above copyright

- *    notice, this list of conditions and the following disclaimer.

- * 2. Redistributions in binary form must reproduce the above copyright

- *    notice, this list of conditions and the following disclaimer in

- *    the documentation and/or other materials provided with the

- *    distribution.

- * 3. Neither the name NuttX nor the names of its contributors may be

- *    used to endorse or promote products derived from this software

- *    without specific prior written permission.

- *

- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE

- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,

- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,

- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS

- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

- * POSSIBILITY OF SUCH DAMAGE.

- *

- ****************************************************************************/

-

-#ifndef __CONFIGS_AMBER_INCLUDE_BOARD_H

-#define __CONFIGS_AMBER_INCLUDE_BOARD_H

-

-/****************************************************************************

- * Included Files

- ****************************************************************************/

-

-#include <nuttx/config.h>

-

-/****************************************************************************

- * Pre-Processor Definitions

- ****************************************************************************/

-/* Configuration ************************************************************/

-

-/* Clocking *****************************************************************/

-

-#define BOARD_CPU_CLOCK        8000000 /* 8MHz */

-

-/* LED definitions **********************************************************/

-

-#define LED_STARTED            0

-#define LED_HEAPALLOCATE       1

-#define LED_IRQSENABLED        2

-#define LED_STACKCREATED       3

-#define LED_INIRQ              4

-#define LED_SIGNAL             5

-#define LED_ASSERTION          6

-#define LED_PANIC              7

-

-/****************************************************************************

- * Public Types

- ****************************************************************************/

-

-#ifndef __ASSEMBLY__

-

-/****************************************************************************

- * Inline Functions

- ****************************************************************************/

-

-/****************************************************************************

- * Public Function Prototypes

- ****************************************************************************/

-

-#ifdef __cplusplus

-#define EXTERN extern "C"

-extern "C" {

-#else

-#define EXTERN extern

-#endif

-

-#undef EXTERN

-#ifdef __cplusplus

-}

-#endif

-

-#endif /* __ASSEMBLY__ */

-#endif /* __CONFIGS_AMBER_INCLUDE_BOARD_H */

+/****************************************************************************
+ * configs/amber/include/board.h
+ * include/arch/board/board.h
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __CONFIGS_AMBER_INCLUDE_BOARD_H
+#define __CONFIGS_AMBER_INCLUDE_BOARD_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+/* Configuration ************************************************************/
+
+/* Clocking *****************************************************************/
+
+#define BOARD_CPU_CLOCK        14745600 /* F_CPU = 14.7456MHz */
+
+/* LED definitions **********************************************************/
+
+#define LED_STARTED            0
+#define LED_HEAPALLOCATE       1
+#define LED_IRQSENABLED        2
+#define LED_STACKCREATED       3
+#define LED_INIRQ              4
+#define LED_SIGNAL             5
+#define LED_ASSERTION          6
+#define LED_PANIC              7
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/****************************************************************************
+ * Inline Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __CONFIGS_AMBER_INCLUDE_BOARD_H */
diff --git a/nuttx/configs/micropendous3/README.txt b/nuttx/configs/micropendous3/README.txt
index 76b1dc1d9..5794f37dc 100644
--- a/nuttx/configs/micropendous3/README.txt
+++ b/nuttx/configs/micropendous3/README.txt
@@ -12,6 +12,9 @@ Contents
 ^^^^^^^^
 
   o Micropendous3 Features
+  o Pin Usage
+  o Serial Console
+  o Atmel mkII Connection
   o Toolchains
   o Windows Native Toolchains
   o NuttX buildroot Toolchain
@@ -31,7 +34,7 @@ Micropendous3 Features
     stock Atmel or LUFA)
   o 4 kbytes SRAM and 2 kbytes of EEPROM (AT90USB64) or 8 kbytes SRAM and 4
     kbytes of EEPROM (AT90USB128)
-  o external SRAM is possible
+  o External SRAM is possible.  Layout for CY7C1019D 1-Mbit SRAM (unpopulated)
   o USB powered
   o 16MHz crystal
   o 48 General Purpose IO Pins (47 with external SRAM)
@@ -45,6 +48,145 @@ Micropendous3 Features
   o Size LxWxH (including headers): 3.15" x 0.8" x 0.6" =~ 8cm x 2cm x 1.5cm
   o Completely OpenHardware Design
 
+Pin Usage
+^^^^^^^^^
+
+  AT90USB90128/64 TQFP64
+  -- ------------------------ ---------------------------------------------
+  PIN SIGNAL                  BOARD CONNECTION
+  -- ------------------------ ---------------------------------------------
+  (left)
+  1  (INT.6/AIN.0) PE6         J3-25 E6, CY7C1019D ^CE (Unpopulated)
+  2  (INT.7/AIN.1/UVcon) PE7   J3-26 E7, CY7C1019D A16 (Unpopulated)
+  3  UVcc                      
+  4  D-                        USB DP
+  5  D+                        USB DM
+  6  UGnd                      GND
+  7  UCap                      GND (via cap)
+  8  VBus                      USB VBUS
+  9  (IUID) PE3                J3-22 E3
+  10 (SS/PCINT0) PB0           J3-28 B0
+  11 (PCINT1/SCLK) PB1         J3-29 B1
+  12 (PDI/PCINT2/MOSI) PB2     J3-30 B2
+  13 (PDO/PCINT3/MISO) PB3     J3-31 B3
+  14 (PCINT4/OC.2A) PB4        J3-32 B4
+  15 (PCINT5/OC.1A) PB5        J3-33 B5
+  16 (PCINT6/OC.1B) PB6        J3-34 B6
+  (bottom)
+  17 (PCINT7/OC.0A/OC.1C) PB7  J3-35 B7
+  18 (INT4/TOSC1) PE4          J3-23 E4
+  19 (INT.5/TOSC2) PE5         J3-24 E5
+  20 RESET                     SW1
+  21 VCC                       VCC
+  22 GND                       GND
+  23 XTAL2                     X1
+  24 XTAL1                     X1
+  25 (OC0B/SCL/INT0) PD0       J3-36 D0
+  26 (OC2B/SDA/INT1) PD1       J3-37 D1
+  27 (RXD1/INT2) PD2           J3-38 D2
+  28 (TXD1/INT3) PD3           J3-39 D3
+  29 (ICP1) PD4                J3-40 D4
+  30 (XCK1) PD5                J3-41 D5
+  31 (T1) PD6                  J3-42 D6
+  32 (T0) PD7                  J3-43 D7
+  (right)
+  48 PA3 (AD3)                 J3-14 A3, 74AHC573 D3, CY7C1019D |O3 (Unpopulated)
+  47 PA4 (AD4)                 J3-15 A4, 74AHC573 D4, CY7C1019D |O4 (Unpopulated)
+  46 PA5 (AD5)                 J3-16 A5, 74AHC573 D5, CY7C1019D |O5 (Unpopulated)
+  45 PA6 (AD6)                 J3-17 A6, 74AHC573 D6, CY7C1019D |O6 (Unpopulated)
+  44 PA7 (AD7)                 J3-18 A7, 74AHC573 D7, CY7C1019D |O7 (Unpopulated)
+  43 PE2 (ALE/HWB)             SW-2 (pulled-up), J3-21 E2, 74AHC573 Cp
+  42 PC7 (A15/IC.3/CLKO)       J3-51 C7, CY7C1019D A15 (Unpopulated)
+  41 PC6 (A14/OC.3A)           J3-50 C6, CY7C1019D A14 (Unpopulated)
+  40 PC5 (A13/OC.3B)           J3-49 C5, CY7C1019D A13 (Unpopulated)
+  39 PC4 (A12/OC.3C)           J3-48 C4, CY7C1019D A12 (Unpopulated)
+  38 PC3 (A11/T.3)             J3-47 C3, CY7C1019D A11 (Unpopulated)
+  37 PC2 (A10)                 J3-46 C2, CY7C1019D A10 (Unpopulated)
+  36 PC1 (A9)                  J3-45 C1, CY7C1019D A9  (Unpopulated)
+  35 PC0 (A8)                  J3-44 C0, CY7C1019D A8  (Unpopulated)
+  34 PE1 (RD)                  J3-20 E1, CY7C1019D ^OE (Unpopulated)
+  33 PE0 (WR)                  J3-19 E0, CY7C1019D ^WE (Unpopulated)
+  (top)
+  64 AVCC                      (Power circuitry)
+  63 GND                       GND
+  62 AREF                      J3-2 AREF, (Power circuitry)
+  61 PF0 (ADC0)                J3-3 F0
+  60 PF1 (ADC1)                J3-4 F1
+  59 PF2 (ADC2)                J3-5 F2
+  58 PF3 (ADC3)                J3-6 F3
+  57 PF4 (ADC4/TCK)            J3-7 F4, JTAG TCK
+  56 PF5 (ADC5/TMS)            J3-8 F5, JTAG TMS
+  55 PF6 (ADC6/TDO)            J3-9 F6, JTAG TD0
+  54 PF7 (ADC7/TDI)            J3-20 F7, JTAG TDI
+  53 GND                       GND
+  52 VCC                       VCC
+  51 PA0 (AD0)                 J3-11 A0, 74AHC573 D0, CY7C1019D |O0 (Unpopulated)
+  50 PA1 (AD1)                 J3-12 A1, 74AHC573 D1, CY7C1019D |O1 (Unpopulated)
+  49 PA2 (AD2)                 J3-13 A2, 74AHC573 D2, CY7C1019D |O2 (Unpopulated)
+
+Atmel mkII Connection
+^^^^^^^^^^^^^^^^^^^^^
+
+  ISP6PIN Header
+  --------------
+
+        1  2
+  MISO  o  o VCC
+   SCK  o  o MOSI
+  RESET o  o GND
+
+  Micropendous 3 JTAG (JTAG10PIN Connector)
+  ------------------- ---------------------
+  
+      1  2                 1  2
+  TCK o  o GND         TCK o  o GND
+  TDO o  o VCC         TDO o  o VTref
+  TMS o  o RESET       TMS o  o nSRST
+  VCC o  o N/C             o  o (nTRST)
+  TDI o  o GND         TDI o  o GND
+
+  JTAGICE mkII Connection to 10-pin Header
+  ------------------------------------------
+  10PIN Header         6PIN Header
+  -------------------- ---------------------
+  Pin 1 TCK            Pin 3 SCK
+  Pin 2 GND            Pin 6 GND
+  Pin 3 TDO            Pin 1 MISO
+  Pin 4 VTref          Pin 2 Vcc
+  Pin 6 nSRT           Pin 5 Reset
+  Pin 9 TDI            Pin 4 MOSI
+
+Connect your Micropendous board programmed with AVRISP firmware to another AVR using SPI (you can even connect to another USB AVR board to program its' bootloader):
+
+Micropendous	Target AVR
+PB4	RESET
+PB1(SCK)	SCK
+PB2(MOSI)	MOSI/PDI
+PB3(MISO)	MISO/PDO
+GND	GND+AGND
+Vcc	Vcc+AVcc
+
+Serial Console
+^^^^^^^^^^^^^^
+
+  A serial console is supported on an external MAX232/MAX3232 Connected
+  on PD2 and PD3:
+
+  Port D, Bit 2: RXD1, Receive Data (Data input pin for the USART1). When
+    the USART1 receiver is enabled this pin is configured as an input
+    regardless of the value of DDD2. When the USART forces this pin to
+    be an input, the pull-up can still be controlled by the PORTD2 bit.
+  Port D, Bit 3: TXD1, Transmit Data (Data output pin for the USART1).
+    When the USART1 Transmitter is enabled, this pin is configured as
+    an output regardless of the value of DDD3.
+
+  AT90USB90128/64 TQFP64
+  -- ------------------------ ---------------------------------------------
+  PIN SIGNAL                  BOARD CONNECTION
+  -- ------------------------ ---------------------------------------------
+  27 (RXD1/INT2) PD2           J3-38 D2
+  28 (TXD1/INT3) PD3           J3-39 D3
+
 Toolchains
 ^^^^^^^^^^
 
diff --git a/nuttx/configs/micropendous3/include/board.h b/nuttx/configs/micropendous3/include/board.h
index f5b9585d7..e7f72cb33 100755
--- a/nuttx/configs/micropendous3/include/board.h
+++ b/nuttx/configs/micropendous3/include/board.h
@@ -1,93 +1,99 @@
-/****************************************************************************

- * configs/micropendous3/include/board.h

- * include/arch/board/board.h

- *

- *   Copyright (C) 2011 Gregory Nutt. All rights reserved.

- *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>

- *

- * Redistribution and use in source and binary forms, with or without

- * modification, are permitted provided that the following conditions

- * are met:

- *

- * 1. Redistributions of source code must retain the above copyright

- *    notice, this list of conditions and the following disclaimer.

- * 2. Redistributions in binary form must reproduce the above copyright

- *    notice, this list of conditions and the following disclaimer in

- *    the documentation and/or other materials provided with the

- *    distribution.

- * 3. Neither the name NuttX nor the names of its contributors may be

- *    used to endorse or promote products derived from this software

- *    without specific prior written permission.

- *

- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE

- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,

- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,

- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS

- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

- * POSSIBILITY OF SUCH DAMAGE.

- *

- ****************************************************************************/

-

-#ifndef __CONFIGS_MICROPENDOUS3_INCLUDE_BOARD_H

-#define __CONFIGS_MICROPENDOUS3_INCLUDE_BOARD_H

-

-/****************************************************************************

- * Included Files

- ****************************************************************************/

-

-#include <nuttx/config.h>

-

-/****************************************************************************

- * Pre-Processor Definitions

- ****************************************************************************/

-/* Configuration ************************************************************/

-

-/* Clocking *****************************************************************/

-

-#define BOARD_CPU_CLOCK        8000000 /* 8MHz */

-

-/* LED definitions **********************************************************/

-

-#define LED_STARTED            0

-#define LED_HEAPALLOCATE       1

-#define LED_IRQSENABLED        2

-#define LED_STACKCREATED       3

-#define LED_INIRQ              4

-#define LED_SIGNAL             5

-#define LED_ASSERTION          6

-#define LED_PANIC              7

-

-/****************************************************************************

- * Public Types

- ****************************************************************************/

-

-#ifndef __ASSEMBLY__

-

-/****************************************************************************

- * Inline Functions

- ****************************************************************************/

-

-/****************************************************************************

- * Public Function Prototypes

- ****************************************************************************/

-

-#ifdef __cplusplus

-#define EXTERN extern "C"

-extern "C" {

-#else

-#define EXTERN extern

-#endif

-

-#undef EXTERN

-#ifdef __cplusplus

-}

-#endif

-

-#endif /* __ASSEMBLY__ */

-#endif /* __CONFIGS_MICROPENDOUS3_INCLUDE_BOARD_H */

+/****************************************************************************
+ * configs/micropendous3/include/board.h
+ * include/arch/board/board.h
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __CONFIGS_MICROPENDOUS3_INCLUDE_BOARD_H
+#define __CONFIGS_MICROPENDOUS3_INCLUDE_BOARD_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+/* Configuration ************************************************************/
+
+/* Clocking *****************************************************************/
+
+#define BOARD_CPU_CLOCK        16000000 /* F_CPU = 16MHz */
+
+/* LED definitions **********************************************************/
+/* The Micropendous 3 has no on-board LEDs */
+
+#define LED_STARTED            0
+#define LED_HEAPALLOCATE       1
+#define LED_IRQSENABLED        2
+#define LED_STACKCREATED       3
+#define LED_INIRQ              4
+#define LED_SIGNAL             5
+#define LED_ASSERTION          6
+#define LED_PANIC              7
+
+/* Button definitions *******************************************************/
+/* SW1 = Connects to AT90USBxx RESET pin and is not available to software.
+ * SW2 = Connects (via a pull-up) to PE-2
+ */
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/****************************************************************************
+ * Inline Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifdef __cplusplus
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+#undef EXTERN
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __CONFIGS_MICROPENDOUS3_INCLUDE_BOARD_H */