129 lines
5.1 KiB
Markdown
129 lines
5.1 KiB
Markdown
# Synopsys ARC Boards support with embARC_BSP
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## embARC_BSP
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The embARC Board support Package (BSP) is a software distributions aimed at facilitating
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the development and evaluation of embedded systems based on ARCv2 processors, which is
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designed to provide a minimal board support package for ARC users by defining
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consistent and simple software interfaces to the processors and onboard devices.
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The embARC BSP is a new generation embARC software development package.
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It is designed to be the inter-layer between hardware and operating system.
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BSP could hide the difference of hardware/boards, provide a unified interface to upper-layer.
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In the scenarios that no OS is required, embARC BSP can also standalone and work in baremetal.
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embARC_BSP features:
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* Support MetaWare & GNU toolchains
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* Support all development boards and tcf
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* Support various build systems and compiling environments,
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such as ARC MetaWare & GNU IDE, makefile
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* Designware and Subsystem drivers, including UART and GPIO, I2C, SPI, etc.
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* No middleware, no OS
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* Easy to port to different platform / OS
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* One example (UART, GPIO, timer)
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* Code coverage reach 100% in test.
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* MISRA-C compliance
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* C & C++ support, assembly support
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## Supported Boards
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* [ARC Software Development Platform](https://www.synopsys.com/dw/ipdir.php?ds=arc-software-development-platform)
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* [ARC EM Starter Kit](https://www.synopsys.com/dw/ipdir.php?ds=arc_em_starter_kit)
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* [ARC EM Software Development Platform](https://www.synopsys.com/dw/ipdir.php?ds=arc-em-software-development-platform)
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* [ARC HS Development Kit](https://www.synopsys.com/dw/ipdir.php?ds=arc-hs-development-kit)
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* [ARC IoT Development Kit](https://www.synopsys.com/dw/ipdir.php?ds=arc_iot_development_kit)
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## Software Requirement
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### embarc_bsp
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There are two ways to get embarc_bsp:
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#### use RT-Thread ENV tool:
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embARC_BSP has been configured as package module, you can just run the command `pkgs --update` in <RTT_ROOT>/bsp/synopsys/boards
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folder using ENV tool.
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#### without RT-Thread ENV tool:
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We can get it from github: [embarc_bsp](https://github.com/foss-for-synopsys-dwc-arc-processors)
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The default path for embarc_bsp is <RTT_ROOT>/bsp/synopsys/boards/packages/embARC_bsp-upstream,
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when you use other path, please set the environment variable `EMBARC_BSP_ROOT`.
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### Toolchain
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Now both GNU and MetaWare Toolchain are supported, set the System environment variable RTT_CC select the toolchain.
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GNU:
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set RTT_CC=gcc
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MetaWare:
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set RTT_CC=mw
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#### GNU
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The ARC GNU Toolchain offers all of the benefits of open source tools, including complete source code and a large install base. The ARC GNU IDE Installer consists of Eclipse IDE with [ARC GNU plugin for Eclipse](https://github.com/foss-for-synopsys-dwc-arc-processors/arc_gnu_eclipse/releases), [ARC GNU prebuilt toolchain](https://github.com/foss-for-synopsys-dwc-arc-processors/toolchain/releases) and [OpenOCD for ARC](https://github.com/foss-for-synopsys-dwc-arc-processors/openocd>)
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Here, the ARC GNU toolchain is installed to `c:\arc_gnu`. If not, please change the path configuration in rtconfig.py.
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When you use GNU Toolchain, you need to install [Zadig](http://zadig.akeo.ie) to replace the default FTDI driver with WinUSB driver. See [How to Use OpenOCD on Windows](https://github.com/foss-for-synopsys-dwc-arc-processors/arc_gnu_eclipse/wiki/How-to-Use-OpenOCD-on-Windows>) for more information.
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#### MetaWare
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The [DesignWare ARC MetaWare Development Toolkit](https://www.synopsys.com/dw/ipdir.php?ds=sw_metaware) builds on a long legacy of industry-leading compiler and debugger products for embedded applications. It is a complete solution that contains all the components needed to support the development, debugging, and tuning of embedded applications for the DesignWare® ARC® processors.
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Here, the ARC MetaWare toolchain is installed to `C:\ARC\MetaWare`. If not, please change the path configuration in rtconfig.py.
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## Build & Debug
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### Build embarc_lib
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please run the following cmds to build embarc_lib
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cd <rt-thread-root>/bsp/synopsys/boards
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scons --embarc_build
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### Build
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please run the following cmds to build
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cd <rt-thread-root>/bsp/synopsys/boards
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scons
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### Debug
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After compile, please use the following cmds to debug
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scons --gdb #use gdb debugger
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scons --mdb #use mdb debugger
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### How to choose different boards
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There are some parameters we can use in scons, for example:
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scons --BOARD=emsk --BD_VER=23 --CUR_CORE=arcem9d --TOOLCHAIN=mw --OLEVEL=O2
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* BOARD: choose the board, we can set: `emsk, iotdk, emsdp, hsdk, axs`.
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* BD_VER: choose the board version, some boards have different versions, for example,
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we can set: `10, 22, 23` for emsk board.
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* CUR_CORE: choose the arc cores, some boards have different cores, for example,
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we can set: `arcem7d, arcem9d, arcem11d` for emsk board.
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* TOOLCHAIN: choose the toolchain to build embarc_lib, we can set: `mw, gnu`.
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* OLEVEL: choose the build optimize level, we can set: `O0, O2, Os`.
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For more information, you can run the command `scons -h`.
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## Maintainer
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- [vonhust](https://github.com/vonhust)
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- [IRISZZW](https://github.com/IRISZZW)
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