samples: bluetooth: central_iso: demonstrate FT > 1

Setting the SDU latency parameter to a value larger than the SDU interval results in a flush timeout (FT) larger than one if at the same time the ISO policy is switched from "low latency" to "reliability". This demonstrates that the synchronization algorithm can deal with FT > 1. Signed-off-by: Florian Grandel <[email protected]>
zephyrproject-rtos · May 31, 2024 · eb8f0b6 · eb8f0b6
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/samples/bluetooth/central_iso/overlay-bt_ll_sw_split.conf b/samples/bluetooth/central_iso/overlay-bt_ll_sw_split.conf
@@ -23,7 +23,7 @@ CONFIG_BT_CTLR_ISO_TX_BUFFERS=4
 
 # Use Low Latency Connected ISO policy
 CONFIG_BT_CTLR_ADVANCED_FEATURES=y
-CONFIG_BT_CTLR_CONN_ISO_LOW_LATENCY_POLICY=y
+CONFIG_BT_CTLR_CONN_ISO_RELIABILITY_POLICY=y
 
 # Use the below if the sample is sending stale packet sequence number
 # CONFIG_BT_CTLR_ISOAL_SN_STRICT=n
diff --git a/samples/bluetooth/central_iso/src/main.c b/samples/bluetooth/central_iso/src/main.c
@@ -23,7 +23,7 @@
 /* Currently only nRF5 hardware is supported by this sample. */
 #include "bt_clock_hal_nrf5.h"
 
-#define LATENCY_MS      10U                   /* 10.0 ms */
+#define LATENCY_MS      20U /* 20.0 ms, FT=2 with CIS reliability policy, otherwise w/o effect */
 #define SDU_INTERVAL_US (10U * USEC_PER_MSEC) /* 10.0 ms */
 #define NUM_RETRIES     1U                    /* SDU tx retries, influences ISO interval length */