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README
^^^^^^
Toolchain
^^^^^^^^^
A GNU GCC-based toolchain is assumed. The files */setenv.sh should
be modified to point to the correct path to the ARM920T GCC 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 mx1ads/<sub-dir>
2. Download the latest buildroot package into <some-dir>
3. unpack
4. cd <some-dir>/buildroot
5. cp configs/arm920t-defconfig-4.2.4 .config
6. make oldconfig
7. make
8. Edit setenv.h so that the PATH variable includes the path to the
newly built binaries.
ARM/i.MX1-specific Configuration Options
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
CONFIG_ARCH - Identifies the arch/ subdirectory. This should
be set to:
CONFIG_ARCH=arm
CONFIG_ARCH_name - For use in C code:
CONFIG_ARCH_ARM=y
CONFIG_ARCH_CHIP - Identifies the arch/*/chip subdirectory
CONFIG_ARCH_CHIP=imx
CONFIG_ARCH_CHIP_name - For use in C code. Could be line _IMX1,
_IMXL, _IMX21, _IMX27, _IMX31, etc. (not all of which are
supported).
CONFIG_ARCH_CHIP_IMX1
CONFIG_ARCH_BOARD - Identifies the configs subdirectory and
hence, the board that supports the particular chip or SoC.
CONFIG_ARCH_BOARD=mx1ads (for the Freescale MX1ADS evaluation board)
CONFIG_ARCH_BOARD_name - For use in C code
CONFIG_ARCH_BOARD_MX1ADS (for the Spectrum Digital C5471 EVM)
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.
CONFIG_DRAM_START - The start address of installed DRAM
CONFIG_DRAM_VSTART - The startaddress of DRAM (virtual)
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
IMX specific device driver settings
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
CONFIG_UARTn_2STOP - Two stop bits
IMX USB Configuration
CONFIG_IMX_GIO_USBATTACH
GIO that detects USB attach/detach events
CONFIG_IMX_GIO_USBDPPULLUP
GIO
CONFIG_DMA320_USBDEV_DMA
Enable IMX-specific DMA support
CONFIG_IMX_GIO_USBATTACH=6
Configurations
^^^^^^^^^^^^^^
Each Neuros OSD configuration is maintained in a sudirectory and
can be selected as follow:
cd tools
./configure.sh imxads/<subdir>
cd -
. ./setenv.sh
Where <subdir> is one of the following:
ostest
^^^^^^
This configuration directory, performs a simple OS test using
examples/ostest.
Configuration Options
^^^^^^^^^^^^^^^^^^^^^
In additional to the common configuration options listed in the
file configs/README.txt, there are other configuration options
specific to the IMX:
CONFIG_ARCH - identifies the arch subdirectory and, hence, the
processor architecture.
CONFIG_ARCH_name - for use in C code. This identifies the
particular chip or SoC that the architecture is implemented
in.
CONFIG_ARCH_CHIP - Identifies the arch/*/chip subdirectory
CONFIG_ARCH_CHIP_name - For use in C code
CONFIG_ARCH_BOARD - identifies the configs subdirectory and, hence,
the board that supports the particular chip or SoC.
CONFIG_ENDIAN_BIG - define if big endian (default is little endian)
CONFIG_ARCH_BOARD_name - for use in C code
CONFIG_BOARD_LOOPSPERMSEC - for delay loops
CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to lpc2148.
CONFIG_DRAM_SIZE - Describes the internal DRAM.
CONFIG_DRAM_START - The start address of internal DRAM
CONFIG_ARCH_STACKDUMP - Do stack dumps after assertions
IMX specific device driver settings
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
CONFIG_UARTn_2STOP - Two stop bits
IMX USB Configuration
CONFIG_IMX_GIO_USBATTACH
GIO that detects USB attach/detach events
CONFIG_IMX_GIO_USBDPPULLUP
GIO connected to D+. Support software connect/disconnect.
CONFIG_DMA320_USBDEV_DMA
Enable IMX-specific DMA support
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