Mbed OS是ARM公司自己打造、主打IoT的解决方案，是一个针对ARM CortexM系列处理器的嵌入式开源生态。mbedOS现在还处于成长和推广阶段，在国内真正应用的客户还很少。
Mbed OS主推在线编译，但许多人习惯用离线开发嵌入式软件，Mbed OS提供了Mbed CLI，基于命令行的开发包，它是用python开发的。
Mbed CLI的工作流程
1. 为一个应用程序，程序库，或者导入的模块，建立一个新的repository（代码空间），这一步同时导入了Mbed OS代码库（Mbed OS codebase）
2. 建立你的程序
3. 测试
4. 发布你的应用程序
搭建环境
开发板：NUCLEO-F207ZG
开发工具：
mbedOS支持三种开发工具：
1. 在线IDE
2. Mbed CLI控制台
3. 第三方开发工具，如IAR，MDK
在线IDE编译很方便快捷，但没有调试功能。第三方的IDE对于我们来说也不是重点。我们着重会来介绍Mbed-CLI，它可以代码仓库版本控制、依赖管理、代码发布、从其他地方获取代码、调用编译系统及其他。
Mbed CLI 安装
Windows安装比较简单，直接到官网（https://os.mbed.com/blog/entry/windows-installer-for-mbed-cli/）下载安装，下载链接https://mbed-media.mbed.com/filer_public/7f/46/7f46e205-52f5-48e2-be64-8f30d52f6d75/mbed_installer_v041.exe
LINUX安装，需要先安装以下工具
- Python – mbed CLI 是用Python写的，并且在 version 2.7.11 上做过完整测试，不兼容x.
- Git– version 1.9.5 or later
- Mercurial– version 2.2.2 or later
- GNU ARM– ARM GCC交叉编译工具
$ git clone https://github.com/ARMmbed/mbed-cli
$ python setup.py install
参考链接https://docs.mbed.com/docs/mbed-os-handbook/en/5.1/dev_tools/cli/
Mbed CLI运行
Windows进入命令行，输入mbed运行。
显示Mbed CLI的常见参数。
配置下GCC的路径（你安装GNU ARM的路径）：
mbed config –global GCC_ARM_PATH “C:\Program Files （x86）\ GNU Tools ARM Embedded\6 2017-q2-update\bin”
mbed config –list检查
快速例子：
mbed import mbed-os-example-blinky
cd mbed-os-example-blinky
mbed compile –S 检查一下支持列表
针对NUCLEO_F207ZG开发板进行编译
mbed compile -t GCC_ARM -m NUCLEO_F207ZG
Building project mbed-os-example-blinky (NUCLEO_F207ZG, GCC_ARM)
Scan: .
Scan: env
Scan: mbed
Scan: FEATURE_LWIP
Compile [ 0.3%]: AnalogIn.cpp
Compile [ 0.5%]: BusIn.cpp
Compile [ 0.8%]: main.cpp
Compile [ 1.1%]: BusInOut.cpp
Compile [ 1.3%]: BusOut.cpp
Compile [ 1.6%]: CAN.cpp
Compile [ 1.9%]: FlashIAP.cpp
Compile [ 2.1%]: Ethernet.cpp
Compile [ 2.4%]: I2CSlave.cpp
Compile [ 2.7%]: InterruptIn.cpp
Compile [ 2.9%]: I2C.cpp
Compile [ 3.2%]: InterruptManager.cpp
Compile [ 3.5%]: RawSerial.cpp
Compile [ 3.7%]: SPISlave.cpp
Compile [ 4.0%]: SPI.cpp
Compile [ 4.3%]: Serial.cpp
Compile [ 4.5%]: Ticker.cpp
Compile [ 4.8%]: SerialBase.cpp
Compile [ 5.1%]: Timeout.cpp
Compile [ 5.3%]: Timer.cpp
Compile [ 5.6%]: TimerEvent.cpp
Compile [ 5.9%]: UARTSerial.cpp
Compile [ 6.1%]: EventQueue.cpp
Compile [ 6.4%]: equeue.c
Compile [ 6.6%]: equeue_posix.c
Compile [ 6.9%]: equeue_mbed.cpp
Compile [ 7.2%]: emac_lwip.c
Compile [ 7.4%]: mbed_shared_queues.cpp
Compile [ 7.7%]: emac_stack_lwip.cpp
Compile [ 8.0%]: stm32f2_eth_init.c
Compile [ 8.2%]: stm32f2_eth_conf.c
Compile [ 8.5%]: EthernetInterface.cpp
Compile [ 8.8%]: lwip_checksum.c
Compile [ 9.0%]: lwip_memcpy.c
Compile [ 9.3%]: stm32xx_emac.c
Compile [ 9.6%]: lwip_random.c
Compile [ 9.8%]: lwip_sys_arch.c
Compile [ 10.1%]: lwip_tcp_isn.c
…… ……
Compile [ 99.5%]: stm_spi_api.c
Compile [ 99.7%]: us_ticker_32b.c
Compile [100.0%]: test_env.cpp
Link: mbed-os-example-blinky
Elf2Bin: mbed-os-example-blinky
+—————————————————————————————————————+——-+——-+——-+
| Module | .text | .data | .bss |
+—————————————————————————————————————+——-+——-+——-+
| [fill] | 63 | 4 | 19 |
| [lib]/c.a | 17115 | 2472 | 89 |
| [lib]/gcc.a | 3868 | 0 | 0 |
| [lib]/misc | 252 | 16 | 28 |
| main.o | 72 | 4 | 28 |
| mbed-os\drivers\I2C.o | 16 | 0 | 0 |
| mbed-os\drivers\SPI.o | 120 | 4 | 100 |
| mbed-os\features\FEATURE_LWIP\lwip-interface\lwip-eth\arch\TARGET_STM\stm32xx_emac.o | 24 | 0 | 12556 |
| mbed-os\features\FEATURE_LWIP\lwip-interface\lwip-sys\arch\lwip_sys_arch.o | 20 | 0 | 0 |
| mbed-os\hal\mbed_gpio.o | 78 | 0 | 0 |
| mbed-os\hal\mbed_pinmap_common.o | 218 | 0 | 0 |
| mbed-os\hal\mbed_sleep_manager.o | 219 | 0 | 2 |
| mbed-os\hal\mbed_ticker_api.o | 296 | 0 | 0 |
| mbed-os\hal\mbed_us_ticker_api.o | 52 | 0 | 24 |
| mbed-os\platform\mbed_alloc_wrappers.o | 16 | 0 | 0 |
| mbed-os\platform\mbed_assert.o | 85 | 0 | 0 |
| mbed-os\platform\mbed_board.o | 196 | 0 | 0 |
| mbed-os\platform\mbed_critical.o | 305 | 0 | 5 |
| mbed-os\platform\mbed_error.o | 44 | 0 | 1 |
| mbed-os\platform\mbed_retarget.o | 498 | 4 | 264 |
| mbed-os\platform\mbed_wait_api_rtos.o | 98 | 0 | 0 |
| mbed-os\rtos\TARGET_CORTEX\mbed_boot.o | 467 | 0 | 4360 |
| mbed-os\rtos\TARGET_CORTEX\mbed_rtx_handlers.o | 663 | 0 | 0 |
| mbed-os\rtos\TARGET_CORTEX\mbed_rtx_idle.o | 42 | 4 | 0 |
| mbed-os\rtos\TARGET_CORTEX\rtx5\TARGET_M3\TOOLCHAIN_GCC\irq_cm3.o | 144 | 0 | 0 |
| mbed-os\rtos\TARGET_CORTEX\rtx5\rt_OsEventObserver.o | 0 | 0 | 4 |
| mbed-os\rtos\TARGET_CORTEX\rtx5\rtx_delay.o | 72 | 0 | 0 |
| mbed-os\rtos\TARGET_CORTEX\rtx5\rtx_evr.o | 116 | 0 | 0 |
| mbed-os\rtos\TARGET_CORTEX\rtx5\rtx_kernel.o | 883 | 176 | 0 |
| mbed-os\rtos\TARGET_CORTEX\rtx5\rtx_lib.o | 260 | 0 | 1620 |
| mbed-os\rtos\TARGET_CORTEX\rtx5\rtx_memory.o | 242 | 0 | 0 |
| mbed-os\rtos\TARGET_CORTEX\rtx5\rtx_mempool.o | 288 | 0 | 0 |
| mbed-os\rtos\TARGET_CORTEX\rtx5\rtx_msgqueue.o | 1700 | 0 | 0 |
| mbed-os\rtos\TARGET_CORTEX\rtx5\rtx_mutex.o | 824 | 0 | 0 |
| mbed-os\rtos\TARGET_CORTEX\rtx5\rtx_semaphore.o | 262 | 0 | 0 |
| mbed-os\rtos\TARGET_CORTEX\rtx5\rtx_system.o | 462 | 0 | 0 |
| mbed-os\rtos\TARGET_CORTEX\rtx5\rtx_thread.o | 2036 | 0 | 0 |
| mbed-os\rtos\TARGET_CORTEX\rtx5\rtx_timer.o | 216 | 0 | 0 |
| mbed-os\rtos\Thread.o | 20 | 0 | 4 |
| mbed-os\targets\TARGET_STM\TARGET_STM32F2\TARGET_NUCLEO_F207ZG\PeripheralPins.o | 204 | 0 | 0 |
| mbed-os\targets\TARGET_STM\TARGET_STM32F2\TARGET_NUCLEO_F207ZG\device\TOOLCHAIN_GCC_ARM\startup_stm32f207xx.o | 442 | 0 | 0 |
| mbed-os\targets\TARGET_STM\TARGET_STM32F2\TARGET_NUCLEO_F207ZG\device\system_clock.o | 316 | 0 | 0 |
| mbed-os\targets\TARGET_STM\TARGET_STM32F2\device\stm32f2xx_hal.o | 82 | 0 | 4 |
| mbed-os\targets\TARGET_STM\TARGET_STM32F2\device\stm32f2xx_hal_cortex.o | 36 | 0 | 0 |
| mbed-os\targets\TARGET_STM\TARGET_STM32F2\device\stm32f2xx_hal_eth.o | 116 | 0 | 0 |
| mbed-os\targets\TARGET_STM\TARGET_STM32F2\device\stm32f2xx_hal_pwr.o | 88 | 0 | 0 |
| mbed-os\targets\TARGET_STM\TARGET_STM32F2\device\stm32f2xx_hal_rcc.o | 1332 | 0 | 0 |
| mbed-os\targets\TARGET_STM\TARGET_STM32F2\device\stm32f2xx_hal_tim.o | 342 | 0 | 0 |
| mbed-os\targets\TARGET_STM\TARGET_STM32F2\device\stm32f2xx_hal_uart.o | 658 | 0 | 0 |
| mbed-os\targets\TARGET_STM\TARGET_STM32F2\device\system_stm32f2xx.o | 140 | 4 | 0 |
| mbed-os\targets\TARGET_STM\TARGET_STM32F2\serial_device.o | 670 | 0 | 592 |
| mbed-os\targets\TARGET_STM\can_api.o | 284 | 0 | 12 |
| mbed-os\targets\TARGET_STM\gpio_api.o | 606 | 0 | 0 |
| mbed-os\targets\TARGET_STM\hal_tick_32b.o | 328 | 0 | 4 |
| mbed-os\targets\TARGET_STM\mbed_overrides.o | 22 | 0 | 0 |
| mbed-os\targets\TARGET_STM\pinmap.o | 610 | 0 | 0 |
| mbed-os\targets\TARGET_STM\serial_api.o | 188 | 0 | 0 |
| mbed-os\targets\TARGET_STM\sleep.o | 78 | 0 | 0 |
| mbed-os\targets\TARGET_STM\us_ticker_32b.o | 98 | 0 | 64 |
| Subtotals | 38992 | 2688 | 19780 |
+—————————————————————————————————————+——-+——-+——-+
Total Static RAM memory (data + bss): 22468 bytes
Total Flash memory (text + data): 41680 bytes
Image: .\BUILD\NUCLEO_F207ZG\GCC_ARM\mbed-os-example-blinky.bin
最后
联机烧录。