112 lines
5.9 KiB
ReStructuredText
112 lines
5.9 KiB
ReStructuredText
.. _iso_broadcast_benchmark:
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Bluetooth: Throughput
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#####################
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The ISO Broadcast Benchmark sample measures and report packet loss and sync loss
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of an ISO broadcaster against one or more ISO broadcast receivers.
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Overview
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********
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The sample transmits data from the *broadcaster* to the
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*receiver* (multiple receivers may be used with no effect on the test)
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and measures the quality of the sync.
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The application is used as both a broadcaster and a receiver, and the mode
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can easily be changed.
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Requirements
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************
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* A board with Bluetooth Low Energy 5.2 and Broadcast Isochronous Channel
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support
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* A remote board running the same sample as the reversed role
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Building and running
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********************
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This sample can be found under
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:zephyr_file:`samples/bluetooth/iso_broadcast_benchmark` in the Zephyr tree.
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See :ref:`bluetooth samples section <bluetooth-samples>` for details.
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Testing
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=======
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After programming the sample to both boards, test it by performing the following
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steps:
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1. Connect to both boards with a terminal emulator (for example, PuTTY or
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minicom).
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#. Reset both boards.
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#. In one of the terminal emulators, type "r" to start the application on the
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connected board in the receiver role.
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#. In the other terminal emulator, type "b" to start the application in the
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broadcaster role.
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#. Optionally modify the broadcasting settings.
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#. Observe that the receiver synchronizes to the broadcaster.
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#. Observe the receive statistics on the receiver(s).
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Sample output
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==============
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The receiver will output statistics for overall (since boot), current sync
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(since the BIG was synced) and latest 1000 received packets::
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*** Booting Zephyr OS build zephyr-v2.5.0-3768-g42f09317bfbe ***
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[00:00:00.447,845] <inf> iso_broadcast_main: Starting Bluetooth Throughput
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Choose device role - type r (receiver role) or b (broadcaster role), or q to quit: r
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Receiver role
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[00:00:05.784,698] <inf> iso_broadcast_receiver: Scan started
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[00:00:05.784,698] <inf> iso_broadcast_receiver: Waiting for periodic advertiser
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[00:00:05.793,304] <inf> iso_broadcast_receiver: Found broadcaster with address 28:3B:AD:F5:EE:0C (random) (RSSI -33)
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[00:00:05.793,334] <inf> iso_broadcast_receiver: Periodic advertiser found
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[00:00:05.793,701] <inf> iso_broadcast_receiver: Scan stopped
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[00:00:05.793,701] <inf> iso_broadcast_receiver: Creating Periodic Advertising Sync
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[00:00:05.796,081] <inf> iso_broadcast_receiver: Waiting for periodic sync
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[00:00:06.453,460] <err> bt_scan: Unknown handle 0x0000 for periodic advertising report
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[00:00:06.453,979] <inf> iso_broadcast_receiver: Periodic advertisement synced
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[00:00:06.454,010] <inf> iso_broadcast_receiver: Periodic sync established
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[00:00:06.454,040] <inf> iso_broadcast_receiver: Waiting for BIG info
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[00:00:08.853,485] <inf> iso_broadcast_receiver: BIGinfo received: num_bis 2, nse 1, interval 7 ms, bn 1, pto 0, irc 1, max_pdu 251, sdu_interval 7500 us, max_sdu 251, phy LE 2M, without framing, not encrypted
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[00:00:08.853,515] <inf> iso_broadcast_receiver: Syncing to BIG
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[00:00:08.853,973] <inf> iso_broadcast_receiver: Waiting for BIG sync
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[00:00:11.254,211] <inf> iso_broadcast_receiver: ISO Channel 0x2000124c connected
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[00:00:11.254,333] <inf> iso_broadcast_receiver: BIG sync established
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[00:00:11.254,486] <inf> iso_broadcast_receiver: ISO Channel 0x20001260 connected
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[00:00:11.639,343] <inf> iso_broadcast_receiver: Overall : Received 99/100 (99.00%) - Total packets lost 1
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[00:00:11.639,343] <inf> iso_broadcast_receiver: Current Sync: Received 99/100 (99.00%) - Total packets lost 1
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[00:00:11.639,373] <inf> iso_broadcast_receiver: Latest 1000 : Received 99/100 (99.00%) - Total packets lost 1
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[00:00:12.029,388] <inf> iso_broadcast_receiver: Overall : Received 199/200 (99.50%) - Total packets lost 1
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[00:00:12.029,388] <inf> iso_broadcast_receiver: Current Sync: Received 199/200 (99.50%) - Total packets lost 1
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[00:00:12.029,388] <inf> iso_broadcast_receiver: Latest 1000 : Received 199/200 (99.50%) - Total packets lost 1
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The broadcaster will ask if any changes to the current settings are wanted.
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If y/Y is chosen, then it will create a prompt to enter changes to the settings,
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otherwise continue with the current settings. The broadcaster will then start
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the BIG and output the current counter (since the BIG was created)::
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*** Booting Zephyr OS build zephyr-v2.5.0-3768-g06d4327cc601 ***
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[00:00:00.447,845] <inf> iso_broadcast_main: Starting Bluetooth Throughput
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Choose device role - type r (receiver role) or b (broadcaster role), or q to quit: b
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Broadcaster role
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Change settings (y/N)? (Current settings: rtn=2, interval=7500, latency=10, phy=2, sdu=251, packing=0, framing=0, bis_count=2)
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[00:00:08.802,185] <inf> iso_broadcast_broadcaster: Creating Extended Advertising set
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[00:00:08.804,260] <inf> iso_broadcast_broadcaster: Setting Extended Advertising parameters
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[00:00:08.804,504] <inf> iso_broadcast_broadcaster: Starting Periodic Advertising
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[00:00:08.804,870] <inf> iso_broadcast_broadcaster: Starting Extended Advertising set
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[00:00:08.807,159] <inf> iso_broadcast_broadcaster: Creating BIG
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[00:00:08.807,617] <inf> iso_broadcast_broadcaster: Waiting for BIG complete
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[00:00:08.813,049] <inf> iso_broadcast_broadcaster: ISO Channel 0x20001218 connected
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[00:00:08.813,171] <inf> iso_broadcast_broadcaster: BIG created
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[00:00:08.813,507] <inf> iso_broadcast_broadcaster: ISO Channel 0x2000122c connected
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[00:00:09.196,472] <inf> iso_broadcast_broadcaster: Sending value 100
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[00:00:09.587,036] <inf> iso_broadcast_broadcaster: Sending value 200
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[00:00:09.977,722] <inf> iso_broadcast_broadcaster: Sending value 300
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[00:00:10.368,347] <inf> iso_broadcast_broadcaster: Sending value 400
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[00:00:10.758,972] <inf> iso_broadcast_broadcaster: Sending value 500
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[00:00:11.149,597] <inf> iso_broadcast_broadcaster: Sending value 600
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[00:00:11.540,222] <inf> iso_broadcast_broadcaster: Sending value 700
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