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| <h2 id="project-slinky">Project Slinky</h2> |
| <h3 id="objective">Objective</h3> |
| <p>The goal of the project is to enable and demonstrate remote communications with the Mynewt OS via newt manager (newtmgr). We will do this through a project with Mynewt called Slinky that runs on the STM32-E407 board.</p> |
| <h3 id="what-you-need">What you need</h3> |
| <ol> |
| <li>STM32-E407 development board from Olimex. You can order it from <a href="http://www.mouser.com/ProductDetail/Olimex-Ltd/STM32-E407/?qs=UN6GZl1KCcit6Ye0xmPO4A%3D%3D">http://www.mouser.com</a>, <a href="http://www.digikey.com/product-detail/en/STM32-E407/1188-1093-ND/3726951">http://www.digikey.com</a>, and other places.</li> |
| <li>ARM-USB-TINY-H connector with JTAG interface for debugging ARM microcontrollers (comes with the ribbon cable to hook up to the board)</li> |
| <li>USB A-B type cable to connect the debugger to your personal computer</li> |
| <li>A USB to TTL Serial Cable with female wiring harness. An example is <a href="http://www.amazon.com/JBtek®-WINDOWS-Supported-Raspberry-Programming/dp/B00QT7LQ88/ref=lp_464404_1_9?s=pc&ie=UTF8&qid=1454631303&sr=1-9">http://www.amazon.com/JBtek®-WINDOWS-Supported-Raspberry-Programming/dp/B00QT7LQ88/ref=lp_464404_1_9?s=pc&ie=UTF8&qid=1454631303&sr=1-9</a></li> |
| <li>Personal Computer</li> |
| </ol> |
| <p>The instructions assume the user is using a Bourne-compatible shell (e.g. bash or zsh) on your computer. The given instructions have been tested with the following releases of operating systems:</p> |
| <ul> |
| <li>Mac: OS X Yosemite Version 10.10.5</li> |
| </ul> |
| <h3 id="overview-of-steps">Overview of steps</h3> |
| <ul> |
| <li>Install dependencies</li> |
| <li>Define a target using the newt tool</li> |
| <li>Build executables for the targets using the newt tool</li> |
| <li>Set up serial connection with the targets </li> |
| <li>Create a connection profile using the newtmgr tool</li> |
| <li>Use the newtmgr tool to communicate with the targets</li> |
| </ul> |
| <h3 id="install-newt">Install newt</h3> |
| <p>If you have not already installed <code>newt</code>, see the |
| <a href="../get_started/get_started/">newt installation instructions</a> and ensure newt is installed an in your path.</p> |
| <h3 id="install-newtmgr">Install newtmgr</h3> |
| <p>If you have not already installed <code>newtmgr</code>, see the |
| <a href="../../newtmgr/installing/">newtmgr installation instructions</a> and ensure newtmgr is installed an in your path.</p> |
| <h3 id="create-a-new-project">Create a new project</h3> |
| <p>Instructions for creating a project are located in the <a href="../get_started/project_create/">Basic Setup</a> section of the <a href="../../introduction/">Mynewt Documentation</a>.</p> |
| <p>If you already completed <a href="../project-slinky/">Sim Slinky</a> you can skip this step.</p> |
| <p>We will list only the steps here for brevity. We will name the project |
| <code>slinky</code>.</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>$ newt new slinky |
| Downloading project skeleton from apache/incubator-mynewt-blinky... |
| ... |
| Installing skeleton in slink... |
| Project slink successfully created |
| $ cd slinky |
| $newt install -v |
| Downloading repository description for apache-mynewt-core... success! |
| ... |
| Repos successfully installed |
| </code></pre></div> |
| |
| <p><br></p> |
| <h3 id="set-up-your-target-builds">Set up your target builds</h3> |
| <p>Create a target for <code>stm32_slinky</code> using the native BSP. The Newt tool output is suppressed below for brevity.</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>$ newt target create stm32_slinky |
| $ newt target set stm32_slinky bsp=@apache-mynewt-core/hw/bsp/olimex_stm32-e407_devboard |
| $ newt target set stm32_slinky build_profile=debug |
| $ newt target set stm32_slinky app=@apache-mynewt-core/apps/slinky |
| </code></pre></div> |
| |
| <p>Create a second target for <code>stm32_bootloader</code> to build a bootloader to boot |
| the <code>stm32_slinky</code> image. The tool output is suppressed below for brevity.</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>$ newt target create stm32_bootloader |
| $ newt target set stm32_bootloader bsp=@apache-mynewt-core/hw/bsp/olimex_stm32-e407_devboard |
| $ newt target set stm32_bootloader build_profile=optimized |
| $ newt target set stm32_bootloader target.app=@apache-mynewt-core/apps/boot |
| </code></pre></div> |
| |
| <p><br></p> |
| <h3 id="build-targets">Build Targets</h3> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>$ newt build stm32_slinky |
| Compiling main.c |
| ... |
| Linking slinky.elf |
| App successfully built: ~/dev/slinky/bin/stm32_slinky/apps/slinky/slinky.elf |
| </code></pre></div> |
| |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>newt build stm32_bootloader |
| Compiling crc16.c |
| ... |
| Linking boot.elf |
| App successfully built: ~/slinky/bin/stm32_bootloader/apps/boot/boot.elf |
| </code></pre></div> |
| |
| <p>For the main image, you need to create an image using newt create-image. |
| Give this image some arbitrary version number "1.2.3".</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>$ newt create-image stm32_slinky 1.2.3 |
| App image successfully generated: /Users/paulfdietrich/dev/slinky/bin/stm32_slinky/apps/slinky/slinky.img |
| Build manifest: /Users/paulfdietrich/dev/slinky/bin/stm32_slinky/apps/slinky/manifest.json |
| </code></pre></div> |
| |
| <p><br></p> |
| <h3 id="using-newtmgr-with-a-remote-target">Using newtmgr with a remote target</h3> |
| <ul> |
| <li> |
| <p>First make sure the USB A-B type cable is connected to the ARM-USB-TINY-H debugger connector on the Olimex board. </p> |
| <p>Next go the to project directory and download the slinky project image to the flash of the Olimex board. </p> |
| </li> |
| </ul> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>$ newt load stm32_bootloader |
| $ newt load stm32_slinky |
| </code></pre></div> |
| |
| <p>You can now disconnect the debugging cable from the board. You should see the green LED blinking. If not, try powercycling the board.</p> |
| <p><br></p> |
| <ul> |
| <li> |
| <p>Now you have to set up the serial connection from your computer to the Olimex board. Locate the PC6/USART6_TX (pin#3), PC7/USART6_RX (pin#4), and GND (pin#2) of the UEXT connector on the Olimex board. More information on the UEXT connector can be found at <a href="https://www.olimex.com/Products/Modules/UEXT/">https://www.olimex.com/Products/Modules/UEXT/</a>. The schematic of the board can be found at <a href="https://www.olimex.com/Products/ARM/ST/STM32-E407/resources/STM32-E407_sch.pdf">https://www.olimex.com/Products/ARM/ST/STM32-E407/resources/STM32-E407_sch.pdf</a> for reference.</p> |
| <p><img alt="Alt Layout - Serial Connection" src="../pics/serial_conn.png" /></p> |
| <ul> |
| <li>Connect the female RX pin of the USB-TTL serial cable to the TX of the UEXT connector on the board. </li> |
| <li>Connect the female TX pin of the USB-TTL serial cable to the RX of the UEXT connector on the board. </li> |
| <li>Connect the GND pin of the USB-TTL serial cable to the GND of the UEXT connector on the board.</li> |
| </ul> |
| </li> |
| </ul> |
| <p><br></p> |
| <ul> |
| <li>Locate the serial connection established in the /dev directory of your computer. It should be of the type <code>tty.usbserial-<some identifier></code>.</li> |
| </ul> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code> $ ls /dev/tty.usbserial-AJ03HAQQ |
| /dev/tty.usbserial-AJ03HAQQ |
| </code></pre></div> |
| |
| <p><br></p> |
| <ul> |
| <li>You now have to define a connection profile using newtmgr. You can give it any name you want. The example below shows the connection profile being named as the very imaginative <code>olimex01</code>.</li> |
| </ul> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code> $ pwd |
| /Users/<user>/dev/larva/project/slinky |
| $ newtmgr conn add olimex01 type=serial connstring=/dev/tty.usbserial-AJ03HAQQ |
| Connection profile olimex01 successfully added |
| $ newtmgr conn show |
| Connection profiles: |
| sim1: type=serial, connstring='/dev/ttys007' |
| olimex01: type=serial, connstring='/dev/tty.usbserial-AJ03HAQQ' |
| </code></pre></div> |
| |
| <p><br></p> |
| <ul> |
| <li>Now go ahead and query the Olimex board to get responses back. The simplest command is the <code>echo</code> command to ask it to respond with the text you send it. </li> |
| </ul> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code> $ newtmgr echo -c olimex01 hello |
| {"r": "hello"} |
| $ newtmgr image -c olimex01 list |
| Images: |
| 0 : 1.2.3 |
| $ newtmgr -c olimex01 taskstats |
| Return Code = 0 |
| newtmgr (prio=4 tid=2 runtime=0 cswcnt=12 stksize=512 stkusage=255 last_checkin=0 next_checkin=0) |
| task1 (prio=1 tid=3 runtime=0 cswcnt=299 stksize=128 stkusage=33 last_checkin=0 next_checkin=0) |
| task2 (prio=2 tid=4 runtime=0 cswcnt=300 stksize=128 stkusage=31 last_checkin=0 next_checkin=0) |
| idle (prio=255 tid=0 runtime=299916 cswcnt=313 stksize=32 stkusage=18 last_checkin=0 next_checkin=0) |
| shell (prio=3 tid=1 runtime=1 cswcnt=20 stksize=384 stkusage=60 last_checkin=0 next_checkin=0) |
| </code></pre></div> |
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