2012-09-17 15:18:44 -03:00
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README
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^^^^^^
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Toolchain
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^^^^^^^^^
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A GNU GCC-based toolchain is assumed. The files */setenv.sh should
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be modified to point to the correct path to the ARM920T GCC toolchain (if
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different from the default).
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If you have no ARM toolchain, one can be downloaded from the NuttX
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2012-09-17 16:33:42 -03:00
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SourceForge download site (https://sourceforge.net/projects/nuttx/files/buildroot/).
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2012-09-17 15:18:44 -03:00
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1. You must have already configured Nuttx in <some-dir>nuttx.
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cd tools
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./configure.sh mx1ads/<sub-dir>
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2. Download the latest buildroot package into <some-dir>
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3. unpack
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4. cd <some-dir>/buildroot
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5. cp configs/arm920t-defconfig-4.2.4 .config
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6. make oldconfig
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7. make
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8. Edit setenv.h so that the PATH variable includes the path to the
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newly built binaries.
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ARM/i.MX1-specific Configuration Options
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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CONFIG_ARCH - Identifies the arch/ subdirectory. This should
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be set to:
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CONFIG_ARCH=arm
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CONFIG_ARCH_family - For use in C code:
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CONFIG_ARCH_ARM=y
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CONFIG_ARCH_architecture - For use in C code:
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CONFIG_ARCH_ARM920T=y
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CONFIG_ARCH_CHIP - Identifies the arch/*/chip subdirectory
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CONFIG_ARCH_CHIP=imx
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CONFIG_ARCH_CHIP_name - For use in C code. Could be line _IMX1,
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_IMXL, _IMX21, _IMX27, _IMX31, etc. (not all of which are
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supported).
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CONFIG_ARCH_CHIP_IMX1
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CONFIG_ARCH_BOARD - Identifies the configs subdirectory and
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hence, the board that supports the particular chip or SoC.
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CONFIG_ARCH_BOARD=mx1ads (for the Freescale MX1ADS evaluation board)
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CONFIG_ARCH_BOARD_name - For use in C code
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CONFIG_ARCH_BOARD_MX1ADS (for the Spectrum Digital C5471 EVM)
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CONFIG_ARCH_LOOPSPERMSEC - Must be calibrated for correct operation
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of delay loops
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CONFIG_ENDIAN_BIG - define if big endian (default is little
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endian)
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CONFIG_DRAM_SIZE - Describes the installed DRAM.
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CONFIG_DRAM_START - The start address of installed DRAM
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CONFIG_DRAM_VSTART - The startaddress of DRAM (virtual)
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CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to boards that
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have LEDs
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CONFIG_ARCH_INTERRUPTSTACK - This architecture supports an interrupt
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stack. If defined, this symbol is the size of the interrupt
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stack in bytes. If not defined, the user task stacks will be
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used during interrupt handling.
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CONFIG_ARCH_STACKDUMP - Do stack dumps after assertions
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CONFIG_ARCH_CALIBRATION - Enables some build in instrumentation that
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cause a 100 second delay during boot-up. This 100 second delay
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serves no purpose other than it allows you to calibratre
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CONFIG_ARCH_LOOPSPERMSEC. You simply use a stop watch to measure
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the 100 second delay then adjust CONFIG_ARCH_LOOPSPERMSEC until
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the delay actually is 100 seconds.
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IMX specific device driver settings
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CONFIG_UARTn_SERIAL_CONSOLE - selects the UARTn for the
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console and ttys0 (default is the UART0).
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CONFIG_UARTn_RXBUFSIZE - Characters are buffered as received.
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This specific the size of the receive buffer
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CONFIG_UARTn_TXBUFSIZE - Characters are buffered before
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being sent. This specific the size of the transmit buffer
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CONFIG_UARTn_BAUD - The configure BAUD of the UART. Must be
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CONFIG_UARTn_BITS - The number of bits. Must be either 7 or 8.
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CONFIG_UARTn_PARTIY - 0=no parity, 1=odd parity, 2=even parity
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CONFIG_UARTn_2STOP - Two stop bits
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IMX USB Configuration
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CONFIG_IMX_GIO_USBATTACH
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GIO that detects USB attach/detach events
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CONFIG_IMX_GIO_USBDPPULLUP
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GIO
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CONFIG_DMA320_USBDEV_DMA
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Enable IMX-specific DMA support
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CONFIG_IMX_GIO_USBATTACH=6
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Configurations
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^^^^^^^^^^^^^^
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Each MX1ADS configuration is maintained in a sudirectory and
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can be selected as follow:
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cd tools
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./configure.sh imxads/<subdir>
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cd -
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. ./setenv.sh
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Where <subdir> is one of the following:
|
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ostest
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|
^^^^^^
|
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This configuration directory, performs a simple OS test using
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examples/ostest.
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