samples: Bluetooth: Print that sample does not support > 1 subevent

This commit adds a print statement to both connected_cs_initiator and
connected_cs_reflector which will inform the user that the sample cannot
handle more than 1 CS subevent per CS procedure.

This is preferable over the sample failing silently if a user is
attempting to use such a configuration.

Signed-off-by: Erik Sandgren <erik.sandgren@nordicsemi.no>

Author: eriksandgren

samples/bluetooth/channel_sounding/src/connected_cs_initiator.c

@@ -29,6 +29,7 @@ static ssize_t on_attr_write_cb(struct bt_conn *conn, const struct bt_gatt_attr
 static struct bt_conn *connection;
 static uint8_t n_ap;
 static uint8_t latest_num_steps_reported;
+static uint16_t latest_procedure_counter = UINT16_MAX;
 static uint16_t latest_step_data_len;
 static uint8_t latest_local_steps[STEP_DATA_BUF_LEN];
 static uint8_t latest_peer_steps[STEP_DATA_BUF_LEN];
@@ -72,6 +73,13 @@ static void subevent_result_cb(struct bt_conn *conn, struct bt_conn_le_cs_subeve
 	latest_num_steps_reported = result->header.num_steps_reported;
 	n_ap = result->header.num_antenna_paths;
 
+	if (result->header.procedure_counter == latest_procedure_counter) {
+		printk("The sample does not handle CS procedures with multiple CS subevents.\n");
+		latest_procedure_counter = result->header.procedure_counter;
+		return;
+	}
+	latest_procedure_counter = result->header.procedure_counter;
+
 	if (result->step_data_buf) {
 		if (result->step_data_buf->len <= STEP_DATA_BUF_LEN) {
 			memcpy(latest_local_steps, result->step_data_buf->data,

samples/bluetooth/channel_sounding/src/connected_cs_reflector.c

@@ -25,6 +25,7 @@ static K_SEM_DEFINE(sem_written, 0, 1);
 
 static uint16_t step_data_attr_handle;
 static struct bt_conn *connection;
+static uint16_t latest_procedure_counter = UINT16_MAX;
 static uint8_t latest_local_steps[STEP_DATA_BUF_LEN];
 
 static const char sample_str[] = "CS Sample";
@@ -34,6 +35,13 @@ static const struct bt_data ad[] = {
 
 static void subevent_result_cb(struct bt_conn *conn, struct bt_conn_le_cs_subevent_result *result)
 {
+	if (result->header.procedure_counter == latest_procedure_counter) {
+		printk("The sample does not handle CS procedures with multiple CS subevents.\n");
+		latest_procedure_counter = result->header.procedure_counter;
+		return;
+	}
+	latest_procedure_counter = result->header.procedure_counter;
+
 	if (result->step_data_buf) {
 		if (result->step_data_buf->len <= STEP_DATA_BUF_LEN) {
 			memcpy(latest_local_steps, result->step_data_buf->data,