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Olimex STR-P711
^^^^^^^^^^^^^^^
Features:
- MCU: STR711FR2T6 16/32 bit ARM7TDMI™ with 256K Bytes Program Flash,
64K Bytes RAM, USB 2.0, RTC, 12 bit ADC, 4x UARTs, 2x I2C,2x SPI,
5x 32bit TIMERS, 2x PWM, 2x CCR, WDT, up to 50MHz operation
- Standard JTAG connector with ARM 2x10 pin layout for programming/debugging
with ARM-JTAG
- USB connector
- Two channel RS232 interface and drivers
- SD/MMC card connector
- Two buttons
- Trimpot connected to ADC
- Two status LEDs
- Buzzer
- UEXT - 10 pin extension connector for Olimex addon peripherials like MP3,
RF2.4Ghz, RFID etc. modules
- 2x SPI connectors
- I2C connector
- On board voltage regulator 3.3V with up to 800mA current
- Single power supply: 6V AC or DC required, USB port can power the board
- Power supply LED
- Power supply filtering capacitor
- RESET circuit
- RESET button
- 4 Mhz crystal oscillator
- 32768 Hz crystal and RTC
Power Supply
6V AC or DC (or powered from USB port)
GIO with on-board connections (others available for prototyping):
SIGNAL DESCRIPTION PIN
------- --------------------- -----
MISO1 BSPI0 to MMC/SD P0.4
MOSI1 " " "" " " P0.5
SCLK1 " " "" " " P0.6
SS1 " " "" " " P0.7
U0RX UART 0 P0.8
U0TX " " " P0.9
U1RX UART 1 P0.10
U1TX " " " P0.11
BUZZ Buzzer P0.13
WAKE-UP Button P0.15
AIN0 Potentiometer (AN_TR) P1.3
LED1 LED 1 P1.8
LED2 LED 2 P1.9
WP MMC/SD write protect P1.10
USBOP USB P1.11
USBON " " P1.12
BUT Button P1.13
CP MMC/SD card present P1.15
Jumpers
STNBY Will pull pin 23 /STDBY low
Development Environment
^^^^^^^^^^^^^^^^^^^^^^^
Either Linux or Cygwin on Windows can be used for the development environment.
The source has been built only using the GNU toolchain (see below). Other
toolchains will likely cause problems.
GNU Toolchain Options
^^^^^^^^^^^^^^^^^^^^^
The NuttX make system has been modified to support the following different
toolchain options.
1. The NuttX buildroot Toolchain (see below).
2. The CodeSourcery GNU toolchain,
3. The devkitARM GNU toolchain, or
All testing has been conducted using the NuttX buildroot toolchain. To use
the CodeSourcery or devkitARM GNU toolchain, you simply need to build the
system as follows:
make # Will build for the NuttX buildroot toolchain
make CROSSDEV=arm-eabi- # Will build for the devkitARM toolchain
make CROSSDEV=arm-none-eabi- # Will build for the CodeSourcery toolchain
make CROSSDEV=arm-elf- # Will build for the NuttX buildroot toolchain
Of course, hard coding this CROSS_COMPILE value in Make.defs file will save
some repetitive typing.
NOTE: the CodeSourcery and devkitARM toolchains are Windows native toolchains.
The NuttX buildroot toolchain is a Cygwin toolchain. 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 not 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; make CROSSDEV=arm-none-eabi-
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.
Support has been added for making dependencies with the CodeSourcery toolchain.
That support can be enabled by modifying your Make.defs file as follows:
- MKDEP = $(TOPDIR)/tools/mknulldeps.sh
+ MKDEP = $(TOPDIR)/tools/mkdeps.sh --winpaths "$(TOPDIR)"
If you have problems with the dependency build (for example, if you are not
building on C:), then you may need to modify tools/mkdeps.sh
NOTE 1: The CodeSourcery toolchain (2009q1) may not work with default optimization
level of -Os (See Make.defs). It will work with -O0, -O1, or -O2, but not with
-Os.
NOTE 2: The devkitARM toolchain includes a version of MSYS make. Make sure that
the paths to Cygwin's /bin and /usr/bin directories appear BEFORE the devkitARM
path or will get the wrong version of make.
NuttX buildroot Toolchain
^^^^^^^^^^^^^^^^^^^^^^^^^
A GNU GCC-based toolchain is assumed. The files */setenv.sh should
be modified to point to the correct path to the ARM toolchain (if
different from the default).
If you have no ARM toolchain, one can be downloaded from the NuttX
SourceForge download site (https://sourceforge.net/project/showfiles.php?group_id=189573).
1. You must have already configured Nuttx in <some-dir>nuttx.
cd tools
./configure.sh olimex-strp711/<sub-dir>
2. Download the latest buildroot package into <some-dir>
3. unpack
4. cd <some-dir>/buildroot
5. cp configs/arm-defconfig .config
or
cp configs/arm7tdmi-defconfig-4.3.3 .config (Last tested with this toolchain)
6. make oldconfig
7. make
8. Edit setenv.h so that the PATH variable includes the path to the
newly built binaries.
OpenOCD
^^^^^^^
For a debug environment, I am using OpenOCD with a Wiggler-clone JTAG interface. The
following steps worked for me with a 20081028 OpenOCD snapshot.
GENERAL STEPS:
1. Check out OpenOCD
svn checkout svn://svn.berlios.de/openocd/trunk openocd
2. Build OpenOCD
Read the INSTALL file from the files you just downloaded. You probably just need
to run:
./bootstrap
Then configure OpenOCD using the configure script created by ./bootstrap.
./configure --enable-parport
Build OpenOCD with:
make
Install OpenOCD. Since we used the default configuration the code will be
installed at /usr/local/bin/openocd. Other files will be installed at
/usr/local/lib/openocd (configuration files, scripts, etc.) and /usr/local/share/info
(online documentation accessable via 'info openocd'). You need root priviledges
to do the following:
make install.
3. Setup
OpenOCD reads its configuration from the file openocd.cfg in the current directory
when started. You have two different options:
* Create a symbolic link named openocd.cfg to one of the configuration files in
/usr/local/lib/openocd, or
* Use a custom configuration file specified with the ‘-f <conf.file>’ command line
switch opeion when starting OpenOCD.
For the STR-P711, I have included bash scripts in the scripts sub-directory.
4. Running OpenOCD
Make sure the ARM7TDMI board is powered and the JTAG cable is connected
Run 'src/openocd -d' (might be required to be root) and check for any errors
reported. The '-d' option enables debugging info.
5. Telnet interface
telnet into port 4444 to get a command interface: 'telnet localhost 4444'
6. GDB
start arm-elf-gdb
type 'file <executable.elf>' to load the executable
type 'set debug remote 1' to enable tracing of gdb protocol (if required)
type 'target remote localhost:3333' to connect to the target
The same commands from the telnet interface can now be accessed through the
'monitor' command, e.g. 'monitor help'
Configurations:
---------------
nsh:
Configures the NuttShell (nsh) located at examples/nsh. The
Configuration enables both the serial and telnetd NSH interfaces.
ostest:
This configuration directory, performs a simple OS test using
examples/ostest.
STR71x-Specific Configuration Settings
--------------------------------------
CONFIG_STR71X_I2C0, CONFIG_STR71X_I2C1, CONFIG_STR71X_UART0, CONFIG_STR71X_UART1,
CONFIG_STR71X_UART2, CONFIG_STR71X_UART3, CONFIG_STR71X_USB, CONFIG_STR71X_CAN,
CONFIG_STR71X_BSPI0, CONFIG_STR71X_BSPI1, CONFIG_STR71X_HDLC, CONFIG_STR71X_XTI,
CONFIG_STR71X_GPIO0, CONFIG_STR71X_GPIO1, CONFIG_STR71X_GPIO2, CONFIG_STR71X_ADC12,
CONFIG_STR71X_CKOUT, CONFIG_STR71X_TIM1, CONFIG_STR71X_TIM2, CONFIG_STR71X_TIM3, and
CONFIG_STR71X_RTC
Select peripherals to initialize (Timer0 and EIC are always initialized)
CONFIG_UART_PRI, STR71X_BSPI_PRI, CONFIG_TIM_PRI, CONFIG_USB_PRI
Can be defined to set the priority of NuttX managed devices. Default is 1.
CONFIG_STR71X_BANK0, CONFIG_STR71X_BANK1, CONFIG_STR71X_BANK2, and CONFIG_STR71X_BANK3
Enable initialize of external memory banks 0-3.
CONFIG_STR71X_BANK0_SIZE, CONFIG_STR71X_BANK1_SIZE, CONFIG_STR71X_BANK2_SIZE, and
CONFIG_STR71X_BANK3_SIZE
If a particular external memory bank is configured, then its width must be provided.
8 and 16 (bits) are the only valid options.
CONFIG_STR71X_BANK0_WAITSTATES, CONFIG_STR71X_BANK1_WAITSTATES,
CONFIG_STR71X_BANK2_WAITSTATES, and CONFIG_STR71X_BANK3_WAITSTATES
If a particular external memory bank is configured, then the number of waistates
for the bank must also be provided. Valid options are {0, .., 15}
CONFIG_STR71X_BIGEXTMEM
The default is to provide 20 bits of address for all external memory regions. If
any memory region is larger than 1Mb, then this option should be selected. In this
case, 24 bits of addressing will be used
CONFIG_UARTn_SERIAL_CONSOLE - selects the UARTn for the
console and ttys0 (default is the UART0).
CONFIG_UARTn_RXBUFSIZE - Characters are buffered as received.
This specific the size of the receive buffer
CONFIG_UARTn_TXBUFSIZE - Characters are buffered before
being sent. This specific the size of the transmit buffer
CONFIG_UARTn_BAUD - The configure BAUD of the UART. Must be
CONFIG_UARTn_BITS - The number of bits. Must be either 7 or 8.
CONFIG_UARTn_PARTIY - 0=no parity, 1=odd parity, 2=even parity, 3=mark 1, 4=space 0
CONFIG_UARTn_2STOP - Two stop bits
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