2021-11-17 02:43:56 -05:00
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/*
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2022-02-08 04:39:38 -05:00
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* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
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2021-11-17 02:43:56 -05:00
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*
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2021-12-06 01:59:55 -05:00
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* SPDX-License-Identifier: Unlicense OR CC0-1.0
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2021-11-17 02:43:56 -05:00
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*/
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#include "esp_log.h"
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#include "nvs_flash.h"
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/* BLE */
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#include "nimble/nimble_port.h"
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#include "nimble/nimble_port_freertos.h"
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#include "host/ble_hs.h"
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#include "host/util/util.h"
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#include "console/console.h"
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#include "services/gap/ble_svc_gap.h"
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#include "ble_spp_client.h"
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#include "driver/uart.h"
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2023-01-23 08:48:31 -05:00
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#define PEER_ADDR_VAL_SIZE 6
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2021-11-17 02:43:56 -05:00
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static const char *tag = "NimBLE_SPP_BLE_CENT";
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static int ble_spp_client_gap_event(struct ble_gap_event *event, void *arg);
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QueueHandle_t spp_common_uart_queue = NULL;
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void ble_store_config_init(void);
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uint16_t attribute_handle[CONFIG_BT_NIMBLE_MAX_CONNECTIONS + 1];
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2022-03-31 05:06:34 -04:00
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static void ble_spp_client_scan(void);
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static ble_addr_t connected_addr[CONFIG_BT_NIMBLE_MAX_CONNECTIONS + 1];
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static void
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ble_spp_client_set_handle(const struct peer *peer)
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{
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const struct peer_chr *chr;
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chr = peer_chr_find_uuid(peer,
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BLE_UUID16_DECLARE(GATT_SPP_SVC_UUID),
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BLE_UUID16_DECLARE(GATT_SPP_CHR_UUID));
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attribute_handle[peer->conn_handle] = chr->chr.val_handle;
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}
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/**
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* Called when service discovery of the specified peer has completed.
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*/
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static void
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ble_spp_client_on_disc_complete(const struct peer *peer, int status, void *arg)
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{
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if (status != 0) {
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/* Service discovery failed. Terminate the connection. */
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MODLOG_DFLT(ERROR, "Error: Service discovery failed; status=%d "
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"conn_handle=%d\n", status, peer->conn_handle);
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ble_gap_terminate(peer->conn_handle, BLE_ERR_REM_USER_CONN_TERM);
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return;
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}
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/* Service discovery has completed successfully. Now we have a complete
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* list of services, characteristics, and descriptors that the peer
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* supports.
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*/
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MODLOG_DFLT(INFO, "Service discovery complete; status=%d "
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"conn_handle=%d\n", status, peer->conn_handle);
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2022-03-31 05:06:34 -04:00
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ble_spp_client_set_handle(peer);
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2022-06-16 05:48:09 -04:00
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#if CONFIG_BT_NIMBLE_MAX_CONNECTIONS > 1
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ble_spp_client_scan();
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#endif
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}
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/**
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* Initiates the GAP general discovery procedure.
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*/
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static void
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ble_spp_client_scan(void)
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{
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uint8_t own_addr_type;
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struct ble_gap_disc_params disc_params;
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int rc;
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/* Figure out address to use while advertising (no privacy for now) */
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rc = ble_hs_id_infer_auto(0, &own_addr_type);
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if (rc != 0) {
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MODLOG_DFLT(ERROR, "error determining address type; rc=%d\n", rc);
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return;
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}
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/* Tell the controller to filter duplicates; we don't want to process
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* repeated advertisements from the same device.
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*/
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disc_params.filter_duplicates = 1;
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/**
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* Perform a passive scan. I.e., don't send follow-up scan requests to
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* each advertiser.
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*/
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disc_params.passive = 1;
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/* Use defaults for the rest of the parameters. */
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disc_params.itvl = 0;
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disc_params.window = 0;
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disc_params.filter_policy = 0;
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disc_params.limited = 0;
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rc = ble_gap_disc(own_addr_type, BLE_HS_FOREVER, &disc_params,
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ble_spp_client_gap_event, NULL);
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if (rc != 0) {
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MODLOG_DFLT(ERROR, "Error initiating GAP discovery procedure; rc=%d\n",
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rc);
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}
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}
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/**
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* Indicates whether we should try to connect to the sender of the specified
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* advertisement. The function returns a positive result if the device
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* advertises connectability and support for the Alert Notification service.
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*/
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static int
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ble_spp_client_should_connect(const struct ble_gap_disc_desc *disc)
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{
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struct ble_hs_adv_fields fields;
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int rc;
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int i;
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2022-06-16 05:48:09 -04:00
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/* Check if device is already connected or not */
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2023-01-23 08:48:31 -05:00
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for ( i = 0; i <= CONFIG_BT_NIMBLE_MAX_CONNECTIONS; i++) {
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if (memcmp(&connected_addr[i].val, disc->addr.val, PEER_ADDR_VAL_SIZE) == 0) {
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MODLOG_DFLT(DEBUG, "Device already connected");
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return 0;
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}
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}
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/* The device has to be advertising connectability. */
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if (disc->event_type != BLE_HCI_ADV_RPT_EVTYPE_ADV_IND &&
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disc->event_type != BLE_HCI_ADV_RPT_EVTYPE_DIR_IND) {
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return 0;
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}
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rc = ble_hs_adv_parse_fields(&fields, disc->data, disc->length_data);
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if (rc != 0) {
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return rc;
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}
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2023-01-23 08:48:31 -05:00
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/* The device has to advertise support for the SPP
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* service (0xABF0).
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*/
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for (i = 0; i < fields.num_uuids16; i++) {
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if (ble_uuid_u16(&fields.uuids16[i].u) == GATT_SPP_SVC_UUID) {
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return 1;
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}
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}
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return 0;
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}
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/**
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* Connects to the sender of the specified advertisement of it looks
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* interesting. A device is "interesting" if it advertises connectability and
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* support for the Alert Notification service.
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*/
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static void
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ble_spp_client_connect_if_interesting(const struct ble_gap_disc_desc *disc)
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{
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uint8_t own_addr_type;
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int rc;
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/* Don't do anything if we don't care about this advertiser. */
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if (!ble_spp_client_should_connect(disc)) {
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return;
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}
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/* Scanning must be stopped before a connection can be initiated. */
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rc = ble_gap_disc_cancel();
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if (rc != 0) {
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MODLOG_DFLT(DEBUG, "Failed to cancel scan; rc=%d\n", rc);
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return;
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}
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/* Figure out address to use for connect (no privacy for now) */
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rc = ble_hs_id_infer_auto(0, &own_addr_type);
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if (rc != 0) {
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MODLOG_DFLT(ERROR, "error determining address type; rc=%d\n", rc);
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return;
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}
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/* Try to connect the the advertiser. Allow 30 seconds (30000 ms) for
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* timeout.
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*/
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rc = ble_gap_connect(own_addr_type, &disc->addr, 30000, NULL,
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ble_spp_client_gap_event, NULL);
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if (rc != 0) {
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MODLOG_DFLT(ERROR, "Error: Failed to connect to device; addr_type=%d "
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"addr=%s; rc=%d\n",
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disc->addr.type, addr_str(disc->addr.val), rc);
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return;
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}
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}
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/**
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* The nimble host executes this callback when a GAP event occurs. The
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* application associates a GAP event callback with each connection that is
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* established. ble_spp_client uses the same callback for all connections.
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*
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* @param event The event being signalled.
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* @param arg Application-specified argument; unused by
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* ble_spp_client.
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*
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* @return 0 if the application successfully handled the
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* event; nonzero on failure. The semantics
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* of the return code is specific to the
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* particular GAP event being signalled.
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*/
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static int
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ble_spp_client_gap_event(struct ble_gap_event *event, void *arg)
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{
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struct ble_gap_conn_desc desc;
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struct ble_hs_adv_fields fields;
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int rc;
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switch (event->type) {
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case BLE_GAP_EVENT_DISC:
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rc = ble_hs_adv_parse_fields(&fields, event->disc.data,
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event->disc.length_data);
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if (rc != 0) {
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return 0;
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}
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/* An advertisment report was received during GAP discovery. */
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print_adv_fields(&fields);
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/* Try to connect to the advertiser if it looks interesting. */
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ble_spp_client_connect_if_interesting(&event->disc);
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return 0;
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case BLE_GAP_EVENT_CONNECT:
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/* A new connection was established or a connection attempt failed. */
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if (event->connect.status == 0) {
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/* Connection successfully established. */
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MODLOG_DFLT(INFO, "Connection established ");
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rc = ble_gap_conn_find(event->connect.conn_handle, &desc);
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assert(rc == 0);
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memcpy(&connected_addr[event->connect.conn_handle].val, desc.peer_id_addr.val,
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PEER_ADDR_VAL_SIZE);
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print_conn_desc(&desc);
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MODLOG_DFLT(INFO, "\n");
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/* Remember peer. */
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rc = peer_add(event->connect.conn_handle);
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if (rc != 0) {
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MODLOG_DFLT(ERROR, "Failed to add peer; rc=%d\n", rc);
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return 0;
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}
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/* Perform service discovery. */
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rc = peer_disc_all(event->connect.conn_handle,
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ble_spp_client_on_disc_complete, NULL);
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if (rc != 0) {
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MODLOG_DFLT(ERROR, "Failed to discover services; rc=%d\n", rc);
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return 0;
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}
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} else {
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/* Connection attempt failed; resume scanning. */
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MODLOG_DFLT(ERROR, "Error: Connection failed; status=%d\n",
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event->connect.status);
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ble_spp_client_scan();
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}
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return 0;
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case BLE_GAP_EVENT_DISCONNECT:
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/* Connection terminated. */
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MODLOG_DFLT(INFO, "disconnect; reason=%d ", event->disconnect.reason);
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print_conn_desc(&event->disconnect.conn);
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MODLOG_DFLT(INFO, "\n");
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/* Forget about peer. */
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memset(&connected_addr[event->disconnect.conn.conn_handle].val, 0, PEER_ADDR_VAL_SIZE);
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attribute_handle[event->disconnect.conn.conn_handle] = 0;
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peer_delete(event->disconnect.conn.conn_handle);
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/* Resume scanning. */
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ble_spp_client_scan();
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return 0;
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case BLE_GAP_EVENT_DISC_COMPLETE:
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MODLOG_DFLT(INFO, "discovery complete; reason=%d\n",
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event->disc_complete.reason);
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return 0;
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case BLE_GAP_EVENT_NOTIFY_RX:
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/* Peer sent us a notification or indication. */
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MODLOG_DFLT(INFO, "received %s; conn_handle=%d attr_handle=%d "
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"attr_len=%d\n",
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event->notify_rx.indication ?
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"indication" :
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"notification",
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event->notify_rx.conn_handle,
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event->notify_rx.attr_handle,
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OS_MBUF_PKTLEN(event->notify_rx.om));
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/* Attribute data is contained in event->notify_rx.om. Use
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* `os_mbuf_copydata` to copy the data received in notification mbuf */
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return 0;
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case BLE_GAP_EVENT_MTU:
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MODLOG_DFLT(INFO, "mtu update event; conn_handle=%d cid=%d mtu=%d\n",
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event->mtu.conn_handle,
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event->mtu.channel_id,
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event->mtu.value);
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return 0;
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default:
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return 0;
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}
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}
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static void
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ble_spp_client_on_reset(int reason)
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{
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MODLOG_DFLT(ERROR, "Resetting state; reason=%d\n", reason);
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}
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static void
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ble_spp_client_on_sync(void)
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{
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int rc;
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/* Make sure we have proper identity address set (public preferred) */
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rc = ble_hs_util_ensure_addr(0);
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assert(rc == 0);
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/* Begin scanning for a peripheral to connect to. */
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ble_spp_client_scan();
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}
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void ble_spp_client_host_task(void *param)
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{
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ESP_LOGI(tag, "BLE Host Task Started");
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/* This function will return only when nimble_port_stop() is executed */
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nimble_port_run();
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nimble_port_freertos_deinit();
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}
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void ble_client_uart_task(void *pvParameters)
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{
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2023-01-23 08:48:31 -05:00
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ESP_LOGI(tag, "BLE client UART task started\n");
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int rc;
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int i;
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uart_event_t event;
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for (;;) {
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//Waiting for UART event.
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if (xQueueReceive(spp_common_uart_queue, (void * )&event, (TickType_t)portMAX_DELAY)) {
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switch (event.type) {
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//Event of UART receving data
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case UART_DATA:
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2022-06-16 05:48:09 -04:00
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if (event.size) {
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2021-11-17 02:43:56 -05:00
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2023-01-23 08:48:31 -05:00
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/* Writing characteristics */
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uint8_t *temp = NULL;
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temp = (uint8_t *)malloc(sizeof(uint8_t) * event.size);
|
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|
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if (temp == NULL) {
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ESP_LOGE(tag, "malloc failed,%s L#%d\n", __func__, __LINE__);
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|
|
break;
|
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}
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|
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memset(temp, 0x0, event.size);
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|
|
uart_read_bytes(UART_NUM_0, temp, event.size, portMAX_DELAY);
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|
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for ( i = 0; i <= CONFIG_BT_NIMBLE_MAX_CONNECTIONS; i++) {
|
|
|
|
if (attribute_handle[i] != 0) {
|
|
|
|
rc = ble_gattc_write_flat(i, attribute_handle[i], temp, event.size, NULL, NULL);
|
|
|
|
if (rc == 0) {
|
|
|
|
ESP_LOGI(tag, "Write in uart task success!");
|
|
|
|
} else {
|
|
|
|
ESP_LOGI(tag, "Error in writing characteristic rc=%d", rc);
|
|
|
|
}
|
|
|
|
vTaskDelay(10);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
free(temp);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
vTaskDelete(NULL);
|
2021-11-17 02:43:56 -05:00
|
|
|
|
|
|
|
}
|
|
|
|
static void ble_spp_uart_init(void)
|
|
|
|
{
|
2023-01-23 08:48:31 -05:00
|
|
|
uart_config_t uart_config = {
|
|
|
|
.baud_rate = 115200,
|
|
|
|
.data_bits = UART_DATA_8_BITS,
|
|
|
|
.parity = UART_PARITY_DISABLE,
|
|
|
|
.stop_bits = UART_STOP_BITS_1,
|
|
|
|
.flow_ctrl = UART_HW_FLOWCTRL_RTS,
|
|
|
|
.rx_flow_ctrl_thresh = 122,
|
|
|
|
.source_clk = UART_SCLK_DEFAULT,
|
|
|
|
};
|
|
|
|
|
|
|
|
//Install UART driver, and get the queue.
|
|
|
|
uart_driver_install(UART_NUM_0, 4096, 8192, 10, &spp_common_uart_queue, 0);
|
|
|
|
//Set UART parameters
|
|
|
|
uart_param_config(UART_NUM_0, &uart_config);
|
|
|
|
//Set UART pins
|
|
|
|
uart_set_pin(UART_NUM_0, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE);
|
|
|
|
xTaskCreate(ble_client_uart_task, "uTask", 4096, (void *)UART_NUM_0, 8, NULL);
|
2021-11-17 02:43:56 -05:00
|
|
|
}
|
|
|
|
void
|
|
|
|
app_main(void)
|
|
|
|
{
|
|
|
|
int rc;
|
|
|
|
/* Initialize NVS — it is used to store PHY calibration data */
|
|
|
|
esp_err_t ret = nvs_flash_init();
|
|
|
|
if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
|
|
|
|
ESP_ERROR_CHECK(nvs_flash_erase());
|
|
|
|
ret = nvs_flash_init();
|
|
|
|
}
|
|
|
|
ESP_ERROR_CHECK(ret);
|
|
|
|
|
|
|
|
nimble_port_init();
|
|
|
|
|
|
|
|
/* Initialize UART driver and start uart task */
|
|
|
|
ble_spp_uart_init();
|
|
|
|
|
|
|
|
/* Configure the host. */
|
|
|
|
ble_hs_cfg.reset_cb = ble_spp_client_on_reset;
|
|
|
|
ble_hs_cfg.sync_cb = ble_spp_client_on_sync;
|
|
|
|
ble_hs_cfg.store_status_cb = ble_store_util_status_rr;
|
|
|
|
|
|
|
|
/* Initialize data structures to track connected peers. */
|
|
|
|
rc = peer_init(MYNEWT_VAL(BLE_MAX_CONNECTIONS), 64, 64, 64);
|
|
|
|
assert(rc == 0);
|
|
|
|
|
|
|
|
/* Set the default device name. */
|
|
|
|
rc = ble_svc_gap_device_name_set("nimble-ble-spp-client");
|
|
|
|
assert(rc == 0);
|
|
|
|
|
|
|
|
/* XXX Need to have template for store */
|
|
|
|
ble_store_config_init();
|
|
|
|
|
|
|
|
nimble_port_freertos_init(ble_spp_client_host_task);
|
|
|
|
}
|