README
======
This README discusses issues unique to NuttX configurations for the
ViewTool STM32F103/F107 V1.2 board. This board may be fitted with either
- STM32F107VCT6, or
- STM32F103VCT6
The board is vary modular with connectors for a variety of peripherals.
Features on the base board include:
- User and Wake-Up Keys
- LEDs
See http://www.viewtool.com/ for further information.
Contents
========
o User and Wake-Up keys
o LEDs
o Serial Console
- Console Configuration
- J5 - USART1
- PL-2013 USB-to-Serial Interface
- RS-232 Module
o Toolchains
- NOTE about Windows native toolchains
o Configurations
- Information Common to All Configurations
- Configuration Sub-directories
User and Wake-Up keys
=====================
All pulled high and will be sensed low when depressed.
SW2 PC11 Needs J42 closed
SW3 PC12 Needs J43 closed
SW4 PA0 Needs J44 closed
LEDs
====
There are four LEDs on the ViewTool STM32F103/F107 board that can be controlled
by software: LED1 through LED4. All pulled high and can be illuminated by
driving the output to low
LED1 PA6
LED2 PA7
LED3 PB12
LED4 PB13
These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is
defined. In that case, the usage by the board port is defined in
include/board.h and src/stm32_leds.c. The LEDs are used to encode OS-related
events as follows:
SYMBOL Meaning LED state
LED1 LED2 LED3 LED4
----------------- ----------------------- ---- ---- ---- ----
LED_STARTED NuttX has been started ON OFF OFF OFF
LED_HEAPALLOCATE Heap has been allocated OFF ON OFF OFF
LED_IRQSENABLED Interrupts enabled ON ON OFF OFF
LED_STACKCREATED Idle stack created OFF OFF ON OFF
LED_INIRQ In an interrupt N/C N/C N/C Soft glow
LED_SIGNAL In a signal handler N/C N/C N/C Soft glow
LED_ASSERTION An assertion failed N/C N/C N/C Soft glow
LED_PANIC The system has crashed N/C N/C N/C 2Hz Flashing
LED_IDLE MCU is is sleep mode Not used
After booting, LED1-3 are not longer used by the system and can be used for
other purposes by the application (Of course, all LEDs are available to the
application if CONFIG_ARCH_LEDS is not defined.
Serial Console
==============
Console Configuration
---------------------
The NuttX console is configured by default on USART1 at 115200 BAUD 8N1
(8-bits, not parity, one stop bit). These setting can, of course, easily
be changed by reconfiguring NuttX.
J5 - USART1
-----------
The boards come with a PL-2303 based USB-to-serial board. Also available
as an option is an RS-232 board. Both have the same pin out on a 6-pin
connector that mates with the upper row of J5.
PIN MODULE BOARD J5
--- ------ ---------------------------
1 5V 1 POWER Power jumper
2 GND 3 GND Ground
3 TXD 5 RXD1 PA10 USART1_RXD
4 RXD 7 TXD1 PA9 USART1_TXD
5 RTS? 9 CTS? PA12 USART1_RTS
6 CTS? 11 RTS? PA11 USART1_CTS
PL-2013 USB-to-Serial Interface
-------------------------------
J37 - CON4. Jumper Settings:
1 <-> 3 : Connects PA9 to the RXD1 output pin
2 <-> 4 : Connects PA10 to the TXD1 input pin
J35 - CON2. Jumper Setting:
Open. the PL2303 adapter receives its power from the USB host.
RS-232 Module
-------------
J37 - CON4. Jumper Settings:
1 <-> 3 : Connects PA9 to the RXD1 output pin
2 <-> 4 : Connects PA10 to the TXD1 input pin
J35 - CON2. Jumper Setting:
1 <-> 2 : Proves 3.3V to the RS-232 module.
Toolchains
==========
NOTE about Windows native toolchains
------------------------------------
There are several limitations to using a Windows based toolchain in a
Cygwin environment. The three biggest are:
1. The Windows toolchain cannot follow Cygwin paths. Path conversions are
performed automatically in the Cygwin makefiles using the 'cygpath'
utility but you might easily find some new path problems. If so, check
out 'cygpath -w'
2. Windows toolchains cannot follow Cygwin symbolic links. Many symbolic
links are used in Nuttx (e.g., include/arch). The make system works
around these problems for the Windows tools by copying directories
instead of linking them. But this can also cause some confusion for
you: For example, you may edit a file in a "linked" directory and find
that your changes had no effect. That is because you are building the
copy of the file in the "fake" symbolic directory. If you use a\
Windows toolchain, you should get in the habit of making like this:
make clean_context all
An alias in your .bashrc file might make that less painful.
3. Dependencies are not made when using Windows versions of the GCC. This is
because the dependencies are generated using Windows pathes which do not
work with the Cygwin make.
MKDEP = $(TOPDIR)/tools/mknulldeps.sh
Configurations
==============
Information Common to All Configurations
----------------------------------------
Each SAM3U-EK configuration is maintained in a sub-directory and
can be selected as follow:
cd tools
./configure.sh viewtool-stm32f107/<subdir>
cd -
. ./setenv.sh
Before sourcing the setenv.sh file above, you should examine it and perform
edits as necessary so that TOOLCHAIN_BIN is the correct path to the directory
than holds your toolchain binaries.
And then build NuttX by simply typing the following. At the conclusion of
the make, the nuttx binary will reside in an ELF file called, simply, nuttx.
make
The <subdir> that is provided above as an argument to the tools/configure.sh
must be is one of the following.
NOTES:
1. These configurations use the mconf-based configuration tool. To
change any of these configurations using that tool, you should:
a. Build and install the kconfig-mconf tool. See nuttx/README.txt
and misc/tools/
b. Execute 'make menuconfig' in nuttx/ in order to start the
reconfiguration process.
2. Unless stated otherwise, all configurations generate console
output on USART1.
3. Unless otherwise stated, the configurations are setup for
Cygwin under Windows:
Build Setup:
CONFIG_HOST_WINDOWS=y : Windows operating system
CONFIG_WINDOWS_CYGWIN=y : POSIX environment under windows
4. All of these configurations use the CodeSourcery for Windows toolchain
(unless stated otherwise in the description of the configuration). That
toolchain selection can easily be reconfigured using 'make menuconfig'.
Here are the relevant current settings:
System Type -> Toolchain:
CONFIG_ARMV7M_TOOLCHAIN_CODESOURCERYW=y : GNU EABI toolchain for windows
The setenv.sh file is available for you to use to set the PATH
variable. The path in the that file may not, however, be correct
for your installation.
See also the "NOTE about Windows native toolchains" in the section call
"GNU Toolchain Options" above.
4. These configurations all assume that the STM32F107VCT6 is mounted on
board. This is configurable; you can select the STM32F103VCT6 as an
alternative.
5. These configurations all assume that you are loading code using
something like the ST-Link v2 JTAG. None of these configurations are
setup to use the DFU bootloader but should be easily reconfigured to
use that bootloader is so desired.
Configuration Sub-directories
-----------------------------
nsh:
This configuration directory provide the basuic NuttShell (NSH).
NOTES:
1. This configuration uses the default USART1 serial console. That
is easily changed by reconfiguring to (1) enable a different
serial peripheral, and (2) selecting that serial peripheral as
the console device.
2. By default, this configuration is set up to build on Windows
under either a Cygwin or MSYS environment using a recent, Windows-
native, generic ARM EABI GCC toolchain (such as the CodeSourcery
toolchain). Both the build environment and the toolchain
selection can easily be changed by reconfiguring:
CONFIG_HOST_WINDOWS=y : Windows operating system
CONFIG_WINDOWS_CYGWIN=y : POSIX environment under windows
CONFIG_ARMV7M_TOOLCHAIN_CODESOURCERYW=y : CodeSourcery for Windows
highpri:
This configuration was used to verify the NuttX high priority, nested
interrupt feature. This is a board-specific test and probably not
of much interest now other than for reference.
This configuration targets the viewtool board with the STM32F103VCT6
mounted. It uses TIM6 to generated high rate interrupts for the test.
