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 nuttx. cd tools ./configure.sh mx1ads/ 2. Download the latest buildroot package into 3. unpack 4. cd /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 MX1ADS configuration is maintained in a sudirectory and can be selected as follow: cd tools ./configure.sh imxads/ cd - . ./setenv.sh Where is one of the following: ostest ^^^^^^ This configuration directory, performs a simple OS test using examples/ostest.