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| <h2 id="check-stats-on-a-ble-device">Check stats on a BLE device</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="pre-requisites">Pre-Requisites</h3> |
| <ul> |
| <li>Ensure you have installed <a href="../../../newt/install/newt_mac/">newt</a> and that the |
| newt command is in your system path. </li> |
| <li>You must have Internet connectivity to fetch remote Mynewt components.</li> |
| <li>You must <a href="../../get_started/native_tools/">install the compiler tools</a> to |
| support native compiling to build the project this tutorial creates. </li> |
| <li>You must install the <a href="https://www.segger.com/jlink-software.html">Segger JLINK package</a> to load your project on the board.</li> |
| <li>You have a board with BLE radio that is supported by Mynewt. We will use an nRF52 Dev board in this tutorial.</li> |
| <li>Cable to establish a serial USB connection between the board and the laptop</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 myapp1 |
| Downloading project skeleton from apache/incubator-mynewt-blinky... |
| Installing skeleton in myapp1... |
| Project myapp1 successfully created. |
| $ cd myapp1 |
| |
| $ newt install -v |
| apache-mynewt-core |
| Downloading repository description for apache-mynewt-core... success! |
| ... |
| apache-mynewt-core successfully installed version 0.7.9-none |
| </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 correctly (nrf52pdk or nrf52dk depending on whether the board is the preview kit or the dev kit, respectively. Look on the top of your board, if you see PCA100040, use the nrf52dk version, otherwide use the nrf52pdk version). </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/nrf52pdk |
| Target targets/myble successfully set target.bsp to @apache-mynewt-core/hw/bsp/nrf52pdk |
| $ 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 |
| $ newt target set myble cflags=-DSTATS_NAME_ENABLE |
| Target targets/myble successfully set pkg.cflags to DSTATS_NAME_ENABLE |
| </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/nrf52pdk |
| 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/nrf52pdk |
| build_profile=optimized |
| cflags=-DSTATS_NAME_ENABLE |
| targets/nrf52_boot |
| app=@apache-mynewt-core/apps/boot |
| bsp=@apache-mynewt-core/hw/bsp/nrf52pdk |
| build_profile=optimized |
| </code></pre></div> |
| |
| <h3 id="build-targets">Build targets</h3> |
| <p>Then build the two targets.</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>$ newt build nrf52_boot |
| <snip> |
| App successfully built: ./bin/nrf52_boot/apps/boot/boot.elf |
| $ newt build myble |
| Compiling hci_common.c |
| Compiling util.c |
| Archiving nimble.a |
| Compiling os.c |
| <snip> |
| </code></pre></div> |
| |
| <p><br></p> |
| <h3 id="create-the-app-image">Create the app image</h3> |
| <p>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 |
| App image succesfully generated: ./bin/makerbeacon/apps/bletiny/bletiny.img |
| Build manifest: ./bin/makerbeacon/apps/bletiny/manifest.json |
| </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. The picture below shows a serial connector set up. Pin PA.08 is RX and pin PA.06 is TX. Make sure TX from the NRF52 goes to RX on your Serial board, and that RX on the NRF52 goes to TX on your Serial Board.</p> |
| <p><img alt="nRF52" src="../pics/nrf52.JPG" title="nRF52 Dev Board with a Serial Connection set up" /></p> |
| <p><br></p> |
| <p>You may use any terminal emulation program to communicate with the board. This tutorial shows a Minicom set up. You will have to find out what the usbserial port number is on your laptop, of course.</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>$ minicom -D /dev/tty.usbserial-AJ03HAQQ |
| </code></pre></div> |
| |
| <p><br></p> |
| <p>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 Nov 24 2015, 16:14:21. |
| Port /dev/tty.usbserial-AJ03HAQQ, 09:57:17 |
| |
| Press Meta-Z for help on special keys |
| |
| <span style="background-color: #ffffcc">? |
| </span>4828455:log echo ? tasks mempools date |
| 4828457:stat b |
| </code></pre></div> |
| |
| <p><br></p> |
| <p>Try the <code>stat</code> command. </p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code><span style="background-color: #ffffcc">stat |
| </span>4973017:Must specify a statistic name to dump, possible names are: |
| 4973021: stat |
| 4973022: ble_l2cap |
| 4973024: ble_att |
| 4973026: ble_gap |
| 4973027: ble_gattc |
| 4973029: ble_gatts |
| 4973031: ble_hs |
| 4973032: ble_ll_conn |
| 4973034: ble_ll |
| </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">stat ble_ll |
| </span>4986297:hci_cmds: 5 |
| 4986297:hci_cmd_errs: 0 |
| 4986299:hci_events_sent: 5 |
| 4986301:bad_ll_state: 0 |
| 4986303:bad_acl_hdr: 0 |
| 4986306:rx_adv_pdu_crc_ok: 0 |
| 4986308:rx_adv_pdu_crc_err: 0 |
| 4986311:rx_adv_bytes_crc_ok: 0 |
| 4986314:rx_adv_bytes_crc_err: 0 |
| 4986317:rx_data_pdu_crc_ok: 0 |
| 4986319:rx_data_pdu_crc_err: 0 |
| 4986322:rx_data_bytes_crc_ok: 0 |
| <snip> |
| </code></pre></div> |
| |
| <p><br></p> |
| <p>For a more exciting output, try scanning your surroundings for BLE adverstisements. The HCI command shown below specifies a scan duration in ms, sets discovery mode to general (as opposed to limited), the filter to no-whitelist, and type of scan to passive. 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 disc=gen filt=no_wl type=passive |
| </span> |
| 5301227:[ts=5301227ssb, mod=4 level=1] host_hci_cmd_send: ogf=0x08 ocf=0x0b len=7 |
| 5301233:[ts=5301233ssb, mod=4 level=1] Command Complete: cmd_pkts=1 ogf=0x8 ocf=0xb status=0 |
| 5301241:[ts=5301241ssb, mod=4 level=1] host_hci_cmd_send: ogf=0x08 ocf=0x0c len=2 |
| 5301248:[ts=5301248ssb, mod=4 level=1] Command Complete: cmd_pkts=1 ogf=0x8 ocf=0xc status=0 |
| GAP procedure initiated: discovery; disc_mode=2 filter_policyLE advertising report. len=38 num=1 evtype=3 addr9 |
| 5301270:[ts=5301270ssb, mod=4 level=1] 02 01 06 03 03 aa fe 12 |
| 5301276:[ts=5301276ssb, mod=4 level=1] 16 aa fe 10 f6 02 67 2e |
| 5301281:[ts=5301281ssb, mod=4 level=1] 63 6f 2f 62 65 61 63 6f |
| 5301287:[ts=5301287ssb, mod=4 level=1] 6e 73 |
| 5301291:[ts=5301291ssb, mod=64 level=2] received advertisement; event_type=3 addr_type=1 addr=0xa0:0x0d:0xec:0: |
| 5301316:[ts=5301316ssb, mod=64 level=2] flags=0x06 |
| 5301321:[ts=5301321ssb, mod=64 level=2] uuids16(complete)=0xfeaa |
| 5301327:[ts=5301327ssb, mod=64 level=2] svc_data_uuid16= |
| <snip> |
| </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 |
| Debugging ./bin/myble/apps/bletiny/bletiny.elf |
| GNU gdb (GNU Tools for ARM Embedded Processors) 7.6.0.20140731-cvs |
| Copyright (C) 2013 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". |
| For bug reporting instructions, please see: |
| <http://www.gnu.org/software/gdb/bugs/>... |
| Reading symbols from ./bin/myble/apps/bletiny/bletiny.elf...done. |
| 0x00002f08 in ?? () |
| (gdb) monitor reset |
| Resetting target |
| (gdb) c |
| Continuing. |
| ^C |
| Program received signal SIGTRAP, Trace/breakpoint trap. |
| os_tick_idle (ticks=1000) at hal_os_tick.c:117 |
| 117 if (ticks > 0) { |
| (gdb) p g_os_time |
| $1 = 37991 |
| (gdb) c |
| Continuing. |
| ^C |
| Program received signal SIGTRAP, Trace/breakpoint trap. |
| os_tick_idle (ticks=1000) at hal_os_tick.c:117 |
| 117 if (ticks > 0) { |
| (gdb) p g_os_time |
| $2 = 51888 |
| (gdb) c |
| Continuing. |
| </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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