samples: bluetooth: central_iso: demonstrate BN > 1

This change increases the max SDU size to twice the available max PDU size which results in a burst number (BN) larger than one. The sample thereby demonstrates that the drift compensation algorithm can deal with BN > 1. Signed-off-by: Florian Grandel <[email protected]>
zephyrproject-rtos · May 31, 2024 · 5fc6fbf · 5fc6fbf
1 parent f13e947
commit 5fc6fbf
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Showing 3 changed files with 6 additions and 1 deletion.
diff --git a/samples/bluetooth/central_iso/prj.conf b/samples/bluetooth/central_iso/prj.conf
@@ -1,3 +1,6 @@
 CONFIG_BT=y
+# Max 2 PDUs per SDU (BN = 2)
+CONFIG_BT_ISO_TX_MTU=494
+
 CONFIG_LOG=y
 CONFIG_BT_ISO_CENTRAL=y
diff --git a/samples/bluetooth/central_iso/src/main.c b/samples/bluetooth/central_iso/src/main.c
@@ -52,7 +52,7 @@ static inline bool is_synchronized(void)
 static uint32_t seq_num;
 static int32_t sdu_interval_us;
 
-NET_BUF_POOL_FIXED_DEFINE(tx_pool, 1, BT_ISO_SDU_BUF_SIZE(CONFIG_BT_ISO_TX_MTU),
+NET_BUF_POOL_FIXED_DEFINE(tx_pool, 2, BT_ISO_SDU_BUF_SIZE(CONFIG_BT_ISO_TX_MTU),
 			  CONFIG_BT_CONN_TX_USER_DATA_SIZE, NULL);
 
 static void iso_send_sdu(struct k_work *work);

diff --git a/samples/bluetooth/peripheral_iso/prj.conf b/samples/bluetooth/peripheral_iso/prj.conf
@@ -2,6 +2,8 @@ CONFIG_BT=y
 CONFIG_LOG=y
 CONFIG_BT_DEVICE_NAME="Zephyr ISO server"
 CONFIG_BT_ISO_PERIPHERAL=y
+CONFIG_BT_ISO_RX_BUF_COUNT=2
+CONFIG_BT_ISO_RX_MTU=494
 CONFIG_BT_SMP=y
 
 CONFIG_BT_KEYS_OVERWRITE_OLDEST=y