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| <h2 id="check-stats-for-a-ble-application-the-nrf52-board">Check stats for a BLE Application the NRF52 Board</h2> |
| <p><br></p> |
| <p>This tutorial explains how to run an example BLE app on a board and command it to scan and spew some stats. The stats will be seen over a serial port, not a BLE wireless connection.</p> |
| <p><br></p> |
| <h3 id="prerequisites">Prerequisites</h3> |
| <p>Ensure that you have met the following prerequisites before continuing with this tutorial:</p> |
| <ul> |
| <li>Have Internet connectivity to fetch remote Mynewt components.</li> |
| <li>Have a board with BLE radio that is supported by Mynewt. We will use an nRF52 Dev board in this tutorial.</li> |
| <li>Have a cable to establish a serial USB connection between the board and the laptop</li> |
| <li>Install the newt tool and toolchains (See <a href="/os/get_started/get_started.md">Basic Setup</a>).</li> |
| <li>Install the <a href="https://www.segger.com/jlink-software.html">Segger JLINK package</a> to load your project on the board.</li> |
| </ul> |
| <p><br></p> |
| <h3 id="create-a-project">Create a project</h3> |
| <p>Use the newt tool to create a new project directory containing a skeletal Mynewt framework. Change into the newly created directory.</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>$ newt new myproj |
| Downloading project skeleton from apache/incubator-mynewt-blinky... |
| Installing skeleton in myproj... |
| Project myproj successfully created. |
| $ cd myproj |
| |
| $ newt install |
| </code></pre></div> |
| |
| <p><br></p> |
| <h3 id="create-targets">Create targets</h3> |
| <p>You will create two targets - one for the bootloader, the other for the application.</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>$ newt target create myble |
| Target targets/myble successfully created |
| $ newt target create nrf52_boot |
| Target targets/myble successfully created |
| $ newt target show |
| targets/my_blinky_sim |
| app=apps/blinky |
| bsp=@apache-mynewt-core/hw/bsp/native |
| build_profile=debug |
| targets/myble |
| targets/nrf52_boot |
| </code></pre></div> |
| |
| <p><br></p> |
| <p>Define the targets further. Note that you are using the example app <code>bletiny</code> for the application target. Set the bsp </p> |
| <p><strong>NOTE:</strong> The preview version, nrf52pdk, is no longer supported. If you do not see PCA100040 on the top of your board, you have a preview version of the board and will need to upgrade your developer board before continuing.</p> |
| <p><br></p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>$ newt target set myble bsp=@apache-mynewt-core/hw/bsp/nrf52dk |
| Target targets/myble successfully set target.bsp to @apache-mynewt-core/hw/bsp/nrf52dk |
| $ newt target set myble app=@apache-mynewt-core/apps/bletiny |
| Target targets/myble successfully set target.app to @apache-mynewt-core/apps/bletiny |
| $ newt target set myble build_profile=optimized |
| Target targets/myble successfully set target.build_profile to optimized |
| </code></pre></div> |
| |
| <p>Use the same <code>newt target set</code> command to set the following definition for the bootloader target -- again, make sure you use the correct value for the bsp based on which version of the board you have..</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>targets/nrf52_boot |
| app=@apache-mynewt-core/apps/boot |
| bsp=@apache-mynewt-core/hw/bsp/nrf52dk |
| build_profile=optimized |
| </code></pre></div> |
| |
| <p>You should have the following targets by the end of this step.</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>$ newt target show |
| targets/my_blinky_sim |
| app=apps/blinky |
| bsp=@apache-mynewt-core/hw/bsp/native |
| build_profile=debug |
| targets/myble |
| app=@apache-mynewt-core/apps/bletiny |
| bsp=@apache-mynewt-core/hw/bsp/nrf52dk |
| build_profile=optimized |
| targets/nrf52_boot |
| app=@apache-mynewt-core/apps/boot |
| bsp=@apache-mynewt-core/hw/bsp/nrf52dk |
| build_profile=optimized |
| </code></pre></div> |
| |
| <p>Since we're interested in seeing the stats, we'll need to enable the stats module for the target. By default, the stats module is not enabled, so we will have to override the default behavior. |
| To do this, you'll need to create a configuration file <code>syscfg.yml</code> in the app directory. from the target definition above, you can see that the app is in <code>apache-mynewt-core/apps/bletiny</code> |
| so that is where you'll put your configuration file. </p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code># Package: apps/bletiny |
| |
| syscfg.vals: |
| SHELL_TASK: 1 |
| STATS_NAMES: 1 |
| STATS_CLI: 1 |
| </code></pre></div> |
| |
| <p>The first configuration value turns on the Shell Task, and we'll need this to get to the shell. The next 2 enable the names for the various stats, and then turns on the stats CLI option.</p> |
| <h3 id="build-targets">Build targets</h3> |
| <p>Then build the two targets.</p> |
| <p>Run the <code>newt build nrf52_boot</code> command to build the bootloader:</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>Building target targets/nrf52_boot |
| Compiling repos/apache-mynewt-core/boot/bootutil/src/image_ec.c |
| Compiling repos/apache-mynewt-core/boot/bootutil/src/image_ec256.c |
| Compiling repos/apache-mynewt-core/boot/bootutil/src/image_rsa.c |
| Compiling repos/apache-mynewt-core/boot/bootutil/src/bootutil_misc.c |
| Compiling repos/apache-mynewt-core/boot/bootutil/src/loader.c |
| Compiling repos/apache-mynewt-core/apps/boot/src/boot.c |
| |
| Archiving sys_sysinit.a |
| Archiving util_mem.a |
| Linking ~/myproj/bin/targets/nrf52_boot/app/apps/boot/boot.elf |
| Target successfully built: targets/nrf52_boot |
| </code></pre></div> |
| |
| <p><br> |
| Run the <code>newt build myble</code> command to build the bletiny application:</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code> newt build myble |
| Building target targets/myble |
| Compiling repos/apache-mynewt-core/encoding/base64/src/base64.c |
| Compiling repos/apache-mynewt-core/encoding/base64/src/hex.c |
| Compiling repos/apache-mynewt-core/hw/bsp/nrf52dk/src/hal_bsp.c |
| Compiling repos/apache-mynewt-core/apps/bletiny/src/parse.c |
| Compiling repos/apache-mynewt-core/apps/bletiny/src/misc.c |
| Compiling repos/apache-mynewt-core/apps/bletiny/src/gatt_svr.c |
| Compiling repos/apache-mynewt-core/apps/bletiny/src/cmd.c |
| Compiling repos/apache-mynewt-core/apps/bletiny/src/main.c |
| |
| Archiving util_mem.a |
| Linking ~/dev/myproj/bin/targets/myble/app/apps/bletiny/bletiny.elf |
| Target successfully built: targets/myble |
| </code></pre></div> |
| |
| <p><br></p> |
| <h3 id="create-the-app-image">Create the app image</h3> |
| <p>Run the <code>newt create-image myble 1.0.0</code> command to generate a signed application image for the <code>myble</code> target. The version number is arbitrary.</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>$newt create-image myble 1.0.0 |
| Compiling bin/targets/myble/generated/src/myble-sysinit-app.c |
| Archiving myble-sysinit-app.a |
| Linking ~/dev/myproj/bin/targets/myble/app/apps/bletiny/bletiny.elf |
| App image succesfully generated: ~/dev/myproj/bin/targets/myble/app/apps/bletiny/bletiny.img |
| </code></pre></div> |
| |
| <p><br></p> |
| <h3 id="load-the-image">Load the image</h3> |
| <p>Make sure the USB connector is in place and the power LED on the board is lit. Use the Power ON/OFF switch to reset the board after loading the image.</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>$ newt load nrf52_boot |
| $ newt load myble |
| </code></pre></div> |
| |
| <p><br></p> |
| <h3 id="establish-serial-connection">Establish serial connection</h3> |
| <p>You will now look for some BLE related stats over a serial connection and see the radio is actually working. |
| If you haven't done so already, make sure you're familiar with the <a href="../../get_started/serial_access/">Serial Port Setup and Configuration</a> |
| section. </p> |
| <p><br></p> |
| <p>Once you have a connection set up, you can connect to your device as follows:</p> |
| <ul> |
| <li> |
| <p>On Mac OS and Linux platforms, you can run <code>minicom -D /dev/tty.usbserial-<port> -b 115200</code> to connect to the console of your app. Note that on Linux, the format of the port name is <code>/dev/ttyUSB<N></code>, where N is a number.</p> |
| </li> |
| <li> |
| <p>On Windows, you can run <code>PuTTY</code> to connect to the device.</p> |
| <p>If you located your port from a MinGW terminal, the port name format is <code>/dev/ttyS<N></code>, where <code>N</code> is a number. You must map the port name to a Windows COM port: <code>/dev/ttyS<N></code> maps to <code>COM<N+1></code>. For example, <code>/dev/ttyS2</code> maps to <code>COM3</code>.</p> |
| <p>You can also use the Windows Device Manager to locate the COM port number.</p> |
| </li> |
| </ul> |
| <p><br> |
| This tutorial uses minicom. When the Minicom screen comes up, type in <code>?</code></p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>Welcome to minicom 2.7 |
| |
| OPTIONS: |
| Compiled on Mar 18 2016, 04:59:47. |
| Port /dev/tty.usbserial-1a12, 21:24:09 |
| |
| Press Meta-Z for help on special keys |
| |
| <span style="background-color: #ffffcc">? |
| </span>7471:Commands: |
| 7471: stat echo ? prompt ticks tasks |
| 7474: mempools date b |
| </code></pre></div> |
| |
| <p><br></p> |
| <p>If you'd like a shell prompt, try the <code>prompt</code> command.</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code><span style="background-color: #ffffcc">prompt |
| </span>14025:Usage: prompt [set|show] [prompt_char] |
| prompt set > |
| 15086:Prompt set to: > |
| 15086:Usage: prompt [set|show] [prompt_char] |
| 15087: > |
| </code></pre></div> |
| |
| <p>You'll notice that there is an ever-increasing counter before the prompt (and before any output to the terminal). |
| This is just a counter kept by the MCU.</p> |
| <p><strong>Note</strong>: If you want to have a shell prompt by default, simply add the line: <code>CONSOLE_PROMPT: 1</code> to your <code>syscfg.yml</code> file and it will be turned on by default.</p> |
| <p><br></p> |
| <p>Try the <code>tasks</code> command. </p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code><span style="background-color: #ffffcc">> tasks |
| </span>Tasks: |
| 46682: task pri tid runtime csw stksz stkuse lcheck ncheck fg |
| 46684: idle 255 0 46683 99 64 31 0 0 0 |
| 46686: main 127 1 1 29 512 156 0 0 0 |
| 46688: ble_ll 0 2 0 12 80 58 0 0 0 |
| 46691: > |
| </code></pre></div> |
| |
| <p><br></p> |
| <p>Try specifying a BLE related stat, for example <code>ble_ll</code>. You should see some HCI (Host Controller Interface) command counts. </p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code><span style="background-color: #ffffcc">113136: > stat ble_ll |
| </span>hci_cmds: 11 |
| 155545:hci_cmd_errs: 0 |
| 155545:hci_events_sent: 11 |
| 155547:bad_ll_state: 0 |
| 155547:bad_acl_hdr: 0 |
| 155548:no_bufs: 0 |
| 155548:rx_adv_pdu_crc_ok: 0 |
| 155549:rx_adv_pdu_crc_err: 0 |
| 155550:rx_adv_bytes_crc_ok: 0 |
| 155551:rx_adv_bytes_crc_err: 0 |
| 155552:rx_data_pdu_crc_ok: 0 |
| |
| ... |
| |
| 155564:scan_req_txf: 0 |
| 155565:scan_req_txg: 0 |
| 155565:scan_rsp_txg: 0 |
| 155566: > |
| </code></pre></div> |
| |
| <p><br></p> |
| <p>For a more exciting output, try scanning your surroundings for BLE advertisements. The HCI command shown below specifies a scan duration in ms, scan to passive, and no duplicates. You should see some scan data flying by!</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code><span style="background-color: #ffffcc">b scan dur=10000 passive=1 nodups=1 |
| </span>37266:[ts=291140616ssb, mod=4 level=1] GAP procedure initiated: discovery; own_as |
| |
| 37641: |
| 38256:received advertisement; event_type=0 rssi=-48 addr_type=1 addr=59:cc:3d:a3: |
| 38261: flags=0x1a: |
| 38261: General discoverable mode |
| 38262: uuids16(complete)=0x1802 |
| 38263: name(complete)=Find Me |
| 38264: |
| 38551:scanning finished |
| </code></pre></div> |
| |
| <p><br></p> |
| <p>If you're still not seeing any output from the device, try running the debugger and see if you are seeing the program execute properly. </p> |
| <p><br></p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>$newt debug myble |
| [~/dev/myproj/repos/apache-mynewt-core/hw/bsp/nrf52dk/nrf52dk_debug.sh ~/dev/myproj/repos/apache-mynewt-core/hw/bsp/nrf52dk ~/dev/wanda/dev/myproj/bin/targets/myble/app/apps/bletiny/bletiny] |
| ~/dev/myproj/repos/apache-mynewt-core/hw/scripts/common.sh: line 38: [: =: unary operator expected |
| Debugging ~/dev/myproj/bin/targets/myble/app/apps/bletiny/bletiny.elf |
| GNU gdb (GNU Tools for ARM Embedded Processors) 7.8.0.20150604-cvs |
| Copyright (C) 2014 Free Software Foundation, Inc. |
| License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> |
| This is free software: you are free to change and redistribute it. |
| There is NO WARRANTY, to the extent permitted by law. Type "show copying" |
| and "show warranty" for details. |
| This GDB was configured as "--host=x86_64-apple-darwin10 --target=arm-none-eabi". |
| Type "show configuration" for configuration details. |
| For bug reporting instructions, please see: |
| <http://www.gnu.org/software/gdb/bugs/>. |
| Find the GDB manual and other documentation resources online at: |
| <http://www.gnu.org/software/gdb/documentation/>. |
| For help, type "help". |
| Type "apropos word" to search for commands related to "word"... |
| Reading symbols from ~/dev/myproj/bin/targets/myble/app/apps/bletiny/bletiny.elf...done. |
| os_tick_idle (ticks=1920) |
| at repos/apache-mynewt-core/hw/mcu/nordic/nrf52xxx/src/hal_os_tick.c:200 |
| 200 if (ticks > 0) { |
| (gdb) monitor reset |
| Resetting target |
| (gdb) c |
| Continuing. |
| ^C |
| Program received signal SIGTRAP, Trace/breakpoint trap. |
| os_tick_idle (ticks=1907) |
| at repos/apache-mynewt-core/hw/mcu/nordic/nrf52xxx/src/hal_os_tick.c:200 |
| 200 if (ticks > 0) { |
| (gdb) p g_os_time |
| $1 = 13 |
| (gdb) c |
| Continuing. |
| ^C |
| Program received signal SIGTRAP, Trace/breakpoint trap. |
| os_tick_idle (ticks=1920) |
| at repos/apache-mynewt-core/hw/mcu/nordic/nrf52xxx/src/hal_os_tick.c:200 |
| 200 if (ticks > 0) { |
| (gdb) p g_os_time |
| $2 = 6611 |
| (gdb) |
| </code></pre></div> |
| |
| <p><br></p> |
| <p>You should see the g_os_time advancing as above, as each os time tick is 1ms. If the system ticks aren't advancing, then nothing's actually running.</p> |
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