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fix(nimble): Added support for bidirectional data trasfer

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This commit is contained in:
Astha Verma 2024-09-09 14:30:47 +05:30
parent ab11ab7769
commit c6f9d1b4cd
1 changed files with 41 additions and 0 deletions
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41
examples/bluetooth/nimble/ble_spp/spp_client/main/main.c
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@ -26,6 +26,43 @@ uint16_t attribute_handle[CONFIG_BT_NIMBLE_MAX_CONNECTIONS + 1];
static void ble_spp_client_scan(void); static void ble_spp_client_scan(void);
static ble_addr_t connected_addr[CONFIG_BT_NIMBLE_MAX_CONNECTIONS + 1]; static ble_addr_t connected_addr[CONFIG_BT_NIMBLE_MAX_CONNECTIONS + 1];
static void ble_spp_client_write_subscribe(const struct peer *peer)
{
uint8_t value[2];
int rc;
const struct peer_dsc *dsc;
/* Subscribe to notifications for the SPP characteristic.
* A central enables notifications by writing two bytes (1, 0) to the
* characteristic's client-characteristic-configuration-descriptor (CCCD).
*/
dsc = peer_dsc_find_uuid(peer,
BLE_UUID16_DECLARE(GATT_SPP_SVC_UUID),
BLE_UUID16_DECLARE(GATT_SPP_CHR_UUID),
BLE_UUID16_DECLARE(BLE_GATT_DSC_CLT_CFG_UUID16));
if (dsc == NULL) {
MODLOG_DFLT(ERROR, "Error: Peer lacks a CCCD for the Unread Alert "
"Status characteristic\n");
goto err;
}
value[0] = 1;
value[1] = 0;
rc = ble_gattc_write_flat(peer->conn_handle, dsc->dsc.handle,
value, sizeof value, NULL, NULL);
if (rc != 0) {
MODLOG_DFLT(ERROR, "Error: Failed to subscribe to characteristic; "
"rc=%d\n", rc);
goto err;
}
return;
err:
/* Terminate the connection. */
ble_gap_terminate(peer->conn_handle, BLE_ERR_REM_USER_CONN_TERM);
}
static void static void
ble_spp_client_set_handle(const struct peer *peer) ble_spp_client_set_handle(const struct peer *peer)
{ {
@ -34,8 +71,10 @@ ble_spp_client_set_handle(const struct peer *peer)
BLE_UUID16_DECLARE(GATT_SPP_SVC_UUID), BLE_UUID16_DECLARE(GATT_SPP_SVC_UUID),
BLE_UUID16_DECLARE(GATT_SPP_CHR_UUID)); BLE_UUID16_DECLARE(GATT_SPP_CHR_UUID));
attribute_handle[peer->conn_handle] = chr->chr.val_handle; attribute_handle[peer->conn_handle] = chr->chr.val_handle;
} }
/** /**
* Called when service discovery of the specified peer has completed. * Called when service discovery of the specified peer has completed.
*/ */
@ -58,6 +97,8 @@ ble_spp_client_on_disc_complete(const struct peer *peer, int status, void *arg)
"conn_handle=%d\n", status, peer->conn_handle); "conn_handle=%d\n", status, peer->conn_handle);
ble_spp_client_set_handle(peer); ble_spp_client_set_handle(peer);
ble_spp_client_write_subscribe(peer);
#if CONFIG_BT_NIMBLE_MAX_CONNECTIONS > 1 #if CONFIG_BT_NIMBLE_MAX_CONNECTIONS > 1
ble_spp_client_scan(); ble_spp_client_scan();
#endif #endif