73 lines
2.4 KiB
Plaintext
73 lines
2.4 KiB
Plaintext
Misoc README
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============
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This README applies to a port to NuttX running on a Qemu LM32 system. You
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can find the Qemu setup at https://bitbucket.org/key2/qemu
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This initial release supports two UARTs, but does not have a system timer
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or other peripherals. More to come.
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Buildroot 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 LM32 GCC toolchain (if
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different from the default in your PATH variable).
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If you have no LM32 toolchain, one can be cloned from the NuttX
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Bitbucket GIT repository (https://bitbucket.org/nuttx/buildroot).
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This GNU toolchain builds and executes in the Linux or Cygwin environment.
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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 misoc/<sub-dir>
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make oldconfig context
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2. Clone the latest buildroot package into <some-dir>/buildroot
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git clone git@bitbucket.org:nuttx/buildroot.git <some-dir>/buildroot
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or
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git clone https://patacongo@bitbucket.org/nuttx/buildroot.git <some-dir>/buildroot
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3. cd <some-dir>/buildroot
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4. cp lm32-elf-defconfig-6.1.0 .config
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5. make oldconfig
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6. make
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7. By default, the tools will be at the absolute path:
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<some-dir>/buildroot/build_lm32/staging_dir/bin
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Or the NuttX relative path:
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../buildroot/build_lm32/staging_dir/bin
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The setenv.sh files in these sub-directories are already set to use
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the relative path. It you choose to install the buildroot package
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in some other location, you may need to edit the setenv.h file so
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that the PATH variable includes the path to the newly built binaries.
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See the file configs/README.txt in the buildroot source tree. That has more
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detailed PLUS some special instructions that you will need to follow if you
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are building a LM32 toolchain for Cygwin under Windows. Also included in
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that README file is a FAQ of frequent build issues that their work-arounds.
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In order to use the buildroot toolchain, you also must set the following
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in your .config file:
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CONFIG_LM3S_TOOLCHAIN_BUILDROOT=y
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configs/misoc/include/generated
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===============================
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In order to build this configuration, you must provide this directory.
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It contains the generated Misoc files. The base configurtion will NOT
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build without this directory!
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