52986226a3
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1150 42af7a65-404d-4744-a932-0658087f49c3
228 lines
7.3 KiB
Plaintext
228 lines
7.3 KiB
Plaintext
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 SH toolchain (if
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different from the default).
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If you have no SH toolchain, one can be downloaded from the NuttX
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SourceForge download site (https://sourceforge.net/project/showfiles.php?group_id=189573).
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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 mcu123-lpc214x/<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/arm-defconfig .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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Flash Tools
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^^^^^^^^^^^
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I use the lpc21isp tool to load NuttX into FLASH. That tool is available
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in the files section at http://tech.groups.yahoo.com/group/lpc21isp/. In
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order version 1.60 of lpc21isp for Linux, I had to make several changes.
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This changes are shown in lpc21ips-1.60.diff.
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I use the script lpc21isp.sh to perform the actual download. You will
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probably have to make some changes to this script in order to use it.
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For example, the path to the built lpc21isp binary will most likely
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have to have change. Then move this script to the top level NuttX
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directory and simply execute it to load NuttX onto the board.
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ARM/LPC214X-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_name - For use in C code:
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CONFIG_ARCH_ARM=y
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CONFIG_ARCH_CHIP - Identifies the arch/*/chip subdirectory
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CONFIG_ARCH_CHIP=c5471
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CONFIG_ARCH_CHIP_name - For use in C code
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CONFIG_ARCH_CHIP_C5471
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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=c5471evm (for the Spectrum Digital C5471 EVM)
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CONFIG_ARCH_BOARD_name - For use in C code
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CONFIG_ARCH_BOARD_C5471EVM (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_END - Should be (CONFIG_DRAM_START+CONFIG_DRAM_SIZE)
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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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LPC2148 specific chip initialization
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CONFIG_EXTMEM_MODE, CONFIG_RAM_MODE, CONFIG_CODE_BASE, CONFIG_PLL_SETUP,
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CONFIG_MAM_SETUP, CONFIG_APBDIV_SETUP, CONFIG_EMC_SETUP, CONFIG_BCFG0_SETUP,
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CONFIG_BCFG1_SETUP, CONFIG_BCFG2_SETUP, CONFIG_BCFG3_SETUP, CONFIG_ADC_SETUP
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LPC214X 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.
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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, 3=mark 1, 4=space 0
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CONFIG_UARTn_2STOP - Two stop bits
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LPC214X USB Configuration
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CONFIG_LPC214X_USBDEV_FRAME_INTERRUPT
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Handle USB Start-Of-Frame events.
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Enable reading SOF from interrupt handler vs. simply reading on demand.
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Probably a bad idea... Unless there is some issue with sampling the SOF
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from hardware asynchronously.
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CONFIG_LPC214X_USBDEV_EPFAST_INTERRUPT
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Enable high priority interrupts. I have no idea why you might want to
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do that
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CONFIG_LPC214X_USBDEV_NDMADESCRIPTORS
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Number of DMA descriptors to allocate in the 8Kb USB RAM. This is a
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tradeoff between the number of DMA channels that can be supported vs
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the size of the DMA buffers available.
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CONFIG_LPC214X_USBDEV_DMA
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Enable lpc214x-specific DMA support
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Configurations
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^^^^^^^^^^^^^^
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Each NXP LPC214x 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 mcu123-lpc214x/<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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nsh
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^^^
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Configures the NuttShell (nsh) located at examples/nsh. The
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Configuration enables only the serial NSH interfaces.
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Configuration Options
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^^^^^^^^^^^^^^^^^^^^^
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In additional to the common configuration options listed in the
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file configs/README.txt, there are other configuration options
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specific to the LPC214x:
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CONFIG_ARCH - identifies the arch subdirectory and, hence, the
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processor architecture.
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CONFIG_ARCH_name - for use in C code. This identifies the
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particular chip or SoC that the architecture is implemented
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in.
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CONFIG_ARCH_CHIP - Identifies the arch/*/chip subdirectory
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CONFIG_ARCH_CHIP_name - For use in C code
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CONFIG_ARCH_BOARD - identifies the configs subdirectory and, hence,
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the board that supports the particular chip or SoC.
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CONFIG_ENDIAN_BIG - define if big endian (default is little endian)
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CONFIG_ARCH_BOARD_name - for use in C code
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CONFIG_BOARD_LOOPSPERMSEC - for delay loops
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CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to lpc2148.
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CONFIG_DRAM_SIZE - Describes the internal DRAM.
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CONFIG_DRAM_START - The start address of internal DRAM
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CONFIG_ARCH_STACKDUMP - Do stack dumps after assertions
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LPC2148 specific chip initialization
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CONFIG_EXTMEM_MODE, CONFIG_RAM_MODE. CONFIG_CODE_BASE, CONFIG_PLL_SETUP,
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CONFIG_MAM_SETUP, CONFIG_APBDIV_SETUP, CONFIG_EMC_SETUP,. CONFIG_BCFG0_SETUP,
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CONFIG_BCFG1_SETUP, CONFIG_BCFG2_SETUP, CONFIG_BCFG3_SETUP, CONFIG_ADC_SETUP
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LPC214X UART 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, 3=mark 1, 4=space 0
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CONFIG_UARTn_2STOP - Two stop bits
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LPC214X USB Configuration
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CONFIG_LPC214X_USBDEV_FRAME_INTERRUPT
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Handle USB Start-Of-Frame events.
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Enable reading SOF from interrupt handler vs. simply reading on demand.
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Probably a bad idea... Unless there is some issue with sampling the SOF
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from hardware asynchronously.
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CONFIG_LPC214X_USBDEV_EPFAST_INTERRUPT
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Enable high priority interrupts. I have no idea why you might want to
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do that
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CONFIG_LPC214X_USBDEV_NDMADESCRIPTORS
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Number of DMA descriptors to allocate in the 8Kb USB RAM. This is a
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tradeoff between the number of DMA channels that can be supported vs
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the size of the DMA buffers available.
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CONFIG_LPC214X_USBDEV_DMA
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Enable lpc214x-specific DMA support
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