ac96bd553a
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2099 42af7a65-404d-4744-a932-0658087f49c3 |
||
---|---|---|
.. | ||
include | ||
ostest | ||
src | ||
README.txt |
README ^^^^^^ References: ^^^^^^^^^^ 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. Testing was performed using the Cygwin environment because the Raisonance R-Link emulate and some RIDE7 development tools were used and those tools works only under Windows. GNU Toolchain Options ^^^^^^^^^^^^^^^^^^^^^ The NuttX make system has been modified to support the following different toolchain options. 1. The CodeSourcery GNU toolchain, 2. The devkitARM GNU toolchain, 3. Raisonance GNU toolchain, or 4. The NuttX buildroot Toolchain (see below). All testing has been conducted using the NuttX buildroot toolchain. However, the make system is setup to default to use the devkitARM toolchain. To use the CodeSourcery, devkitARM or Raisonance GNU toolchain, you simply need to add one of the following configuration options to your .config (or defconfig) file: CONFIG_STM32_CODESOURCERY=y CONFIG_STM32_DEVKITARM=y CONFIG_STM32_RAISONANCE=y CONFIG_STM32_BUILDROOT=y (default) If you are not using CONFIG_STM32_BUILDROOT, then you may also have to modify the PATH in the setenv.h file if your make cannot find the tools. NOTE: the CodeSourcery, devkitARM, and Raisonance toolchains are Windows native toolchains. The NuttX buildroot toolchain is a Cygwin or Linux native 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 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. Support has been added for making dependencies with the windows-native toolchains. 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) does 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 Cortex-M3 GCC toolchain (if different from the default in your PATH variable). If you have no Cortex-M3 toolchain, one can be downloaded from the NuttX SourceForge download site (https://sourceforge.net/project/showfiles.php?group_id=189573). This GNU toolchain builds and executes in the Cygwin environment. 1. You must have already configured Nuttx in <some-dir>/nuttx. cd tools ./configure.sh stm3210e-eval/<sub-dir> 2. Download the latest buildroot package into <some-dir> 3. unpack the buildroot tarball. The resulting directory may have versioning information on it like buildroot-x.y.z. If so, rename <some-dir>/buildroot-x.y.z to <some-dir>/buildroot. 4. cd <some-dir>/buildroot 5. cp configs/cortexm3-defconfig-4.3.3 .config 6. make oldconfig 7. make 8. Edit setenv.h, if necessary, so that the PATH variable includes the path to the newly built binaries. See the file configs/README.txt in the buildroot source tree. That has more detailed PLUS some special instructions that you will need to follow if you are building a Cortex-M3 toolchain for Cygwin under Windows. STM3210E-EVAL-specific Configuration Options ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ CONFIG_ARCH - Identifies the arch/ subdirectory. This should be set to: CONFIG_ARCH=arm CONFIG_ARCH_family - For use in C code: CONFIG_ARCH_ARM=y CONFIG_ARCH_architecture - For use in C code: CONFIG_ARCH_CORTEXM3=y CONFIG_ARCH_CHIP - Identifies the arch/*/chip subdirectory CONFIG_ARCH_CHIP=stm32 CONFIG_ARCH_CHIP_name - For use in C code to identify the exact chip: CONFIG_ARCH_CHIP_STM32F103ZET6 CONFIG_ARCH_BOARD - Identifies the configs subdirectory and hence, the board that supports the particular chip or SoC. CONFIG_ARCH_BOARD=stm3210e_eval (for the STM3210E-EVAL development board) CONFIG_ARCH_BOARD_name - For use in C code CONFIG_ARCH_BOARD_STM3210E_EVAL=y CONFIG_ARCH_LOOPSPERMSEC - Must be calibrated for correct operation of delay loops CONFIG_ENDIAN_BIG - define if big endian (default is little endian) CONFIG_DRAM_SIZE - Describes the installed DRAM (SRAM in this case): CONFIG_DRAM_SIZE=0x00010000 (64Kb) CONFIG_DRAM_START - The start address of installed DRAM CONFIG_DRAM_START=0x20000000 CONFIG_DRAM_END - Last address+1 of installed RAM CONFIG_DRAM_END=(CONFIG_DRAM_START+CONFIG_DRAM_SIZE) CONFIG_ARCH_IRQPRIO - The STM32F103Z supports interrupt prioritization CONFIG_ARCH_IRQPRIO=y CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to boards that have LEDs CONFIG_ARCH_INTERRUPTSTACK - This architecture supports an interrupt stack. If defined, this symbol is the size of the interrupt stack in bytes. If not defined, the user task stacks will be used during interrupt handling. CONFIG_ARCH_STACKDUMP - Do stack dumps after assertions CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to board architecture. CONFIG_ARCH_CALIBRATION - Enables some build in instrumentation that cause a 100 second delay during boot-up. This 100 second delay serves no purpose other than it allows you to calibratre CONFIG_ARCH_LOOPSPERMSEC. You simply use a stop watch to measure the 100 second delay then adjust CONFIG_ARCH_LOOPSPERMSEC until the delay actually is 100 seconds. STM32F103Z specific device driver settings CONFIG_U[S]ARTn_SERIAL_CONSOLE - selects the USARTn (n=1,2,3) or UART m (m=4,5) for the console and ttys0 (default is the USART1). CONFIG_U[S]ARTn_RXBUFSIZE - Characters are buffered as received. This specific the size of the receive buffer CONFIG_U[S]ARTn_TXBUFSIZE - Characters are buffered before being sent. This specific the size of the transmit buffer CONFIG_U[S]ARTn_BAUD - The configure BAUD of the UART. Must be CONFIG_U[S]ARTn_BITS - The number of bits. Must be either 7 or 8. CONFIG_U[S]ARTn_PARTIY - 0=no parity, 1=odd parity, 2=even parity CONFIG_U[S]ARTn_2STOP - Two stop bits CONFIG_SPI1_DISABLE - Select to disable support for SPI1 CONFIG_SPI2_DISABLE - Select to disable support for SPI2 CONFIG_SPI_POLLWAIT - Select to disable interrupt driven SPI support. Poll-waiting is recommended if the interrupt rate would be to high in the interrupt driven case. CONFIG_SPI_TXLIMIT - Write this many words to the Tx FIFO before emptying the Rx FIFO. If the SPI frequency is high and this value is large, then larger values of this setting may cause Rx FIFO overrun errors. Default: half of the Tx FIFO size (4). Configurations ^^^^^^^^^^^^^^ Each STM3210E-EVAL configuration is maintained in a sudirectory and can be selected as follow: cd tools ./configure.sh stm3210e-eval/<subdir> cd - . ./setenv.sh Where <subdir> is one of the following: 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.