mirror of
https://github.com/espressif/esp-idf.git
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399 lines
13 KiB
C
399 lines
13 KiB
C
/*
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* SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "esp_log.h"
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#include "nvs_flash.h"
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#include "freertos/FreeRTOSConfig.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 "gatts_sens.h"
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#include "../src/ble_hs_hci_priv.h"
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#define NOTIFY_THROUGHPUT_PAYLOAD 500
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#define MIN_REQUIRED_MBUF 2 /* Assuming payload of 500Bytes and each mbuf can take 292Bytes. */
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#define PREFERRED_MTU_VALUE 512
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#define LL_PACKET_TIME 2120
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#define LL_PACKET_LENGTH 251
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#define MTU_DEF 512
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static const char *tag = "bleprph_throughput";
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static const char *device_name = "nimble_prph";
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static SemaphoreHandle_t notify_sem;
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static bool notify_state;
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static int notify_test_time = 60;
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static uint16_t conn_handle;
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/* Dummy variable */
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static uint8_t dummy;
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static uint8_t gatts_addr_type;
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static int gatts_gap_event(struct ble_gap_event *event, void *arg);
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/**
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* Utility function to log an array of bytes.
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*/
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void
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print_bytes(const uint8_t *bytes, int len)
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{
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int i;
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for (i = 0; i < len; i++) {
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ESP_LOGI(tag, "%s0x%02x", i != 0 ? ":" : "", bytes[i]);
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}
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}
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void
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print_addr(const void *addr)
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{
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const uint8_t *u8p;
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u8p = addr;
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ESP_LOGI(tag, "%02x:%02x:%02x:%02x:%02x:%02x",
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u8p[5], u8p[4], u8p[3], u8p[2], u8p[1], u8p[0]);
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}
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static void
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bleprph_print_conn_desc(struct ble_gap_conn_desc *desc)
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{
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ESP_LOGI(tag, "handle=%d our_ota_addr_type=%d our_ota_addr=",
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desc->conn_handle, desc->our_ota_addr.type);
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print_addr(desc->our_ota_addr.val);
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ESP_LOGI(tag, " our_id_addr_type=%d our_id_addr=",
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desc->our_id_addr.type);
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print_addr(desc->our_id_addr.val);
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ESP_LOGI(tag, " peer_ota_addr_type=%d peer_ota_addr=",
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desc->peer_ota_addr.type);
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print_addr(desc->peer_ota_addr.val);
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ESP_LOGI(tag, " peer_id_addr_type=%d peer_id_addr=",
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desc->peer_id_addr.type);
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print_addr(desc->peer_id_addr.val);
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ESP_LOGI(tag, " conn_itvl=%d conn_latency=%d supervision_timeout=%d "
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"encrypted=%d authenticated=%d bonded=%d",
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desc->conn_itvl, desc->conn_latency,
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desc->supervision_timeout,
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desc->sec_state.encrypted,
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desc->sec_state.authenticated,
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desc->sec_state.bonded);
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}
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/*
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* Enables advertising with parameters:
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* o General discoverable mode
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* o Undirected connectable mode
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*/
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static void
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gatts_advertise(void)
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{
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struct ble_gap_adv_params adv_params;
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struct ble_hs_adv_fields fields;
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int rc;
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/*
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* Set the advertisement data included in our advertisements:
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* o Flags (indicates advertisement type and other general info)
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* o Advertising tx power
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* o Device name
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*/
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memset(&fields, 0, sizeof(fields));
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/*
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* Advertise two flags:
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* o Discoverability in forthcoming advertisement (general)
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* o BLE-only (BR/EDR unsupported)
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*/
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fields.flags = BLE_HS_ADV_F_DISC_GEN |
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BLE_HS_ADV_F_BREDR_UNSUP;
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/*
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* Indicate that the TX power level field should be included; have the
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* stack fill this value automatically. This is done by assigning the
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* special value BLE_HS_ADV_TX_PWR_LVL_AUTO.
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*/
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fields.tx_pwr_lvl_is_present = 1;
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fields.tx_pwr_lvl = BLE_HS_ADV_TX_PWR_LVL_AUTO;
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fields.name = (uint8_t *)device_name;
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fields.name_len = strlen(device_name);
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fields.name_is_complete = 1;
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rc = ble_gap_adv_set_fields(&fields);
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if (rc != 0) {
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ESP_LOGE(tag, "Error setting advertisement data; rc=%d\n", rc);
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return;
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}
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/* Begin advertising */
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memset(&adv_params, 0, sizeof(adv_params));
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adv_params.conn_mode = BLE_GAP_CONN_MODE_UND;
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adv_params.disc_mode = BLE_GAP_DISC_MODE_GEN;
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rc = ble_gap_adv_start(gatts_addr_type, NULL, BLE_HS_FOREVER,
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&adv_params, gatts_gap_event, NULL);
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if (rc != 0) {
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ESP_LOGE(tag, "Error enabling advertisement; rc=%d\n", rc);
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return;
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}
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}
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/* This function sends notifications to the client */
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static void
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notify_task(void *arg)
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{
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static uint8_t payload[NOTIFY_THROUGHPUT_PAYLOAD] = {0};/* Data payload */
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int rc, notify_count = 0;
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int64_t start_time, end_time, notify_time = 0;
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struct os_mbuf *om;
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payload[0] = dummy; /* storing dummy data */
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payload[1] = rand();
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payload[99] = rand();
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while (!notify_state) {
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vTaskDelay(1000 / portTICK_PERIOD_MS);
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}
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while (1) {
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switch (notify_test_time) {
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case 0:
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vTaskDelay(1000 / portTICK_PERIOD_MS);
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break;
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default:
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start_time = esp_timer_get_time();
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if (!notify_state) {
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vTaskDelay(1000 / portTICK_PERIOD_MS);
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break;
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}
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while (notify_time < (notify_test_time * 1000)) {
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/* We are anyway using counting semaphore for sending
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* notifications. So hopefully not much waiting period will be
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* introduced before sending a new notification. Revisit this
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* counter if need to do away with semaphore waiting. XXX */
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xSemaphoreTake(notify_sem, portMAX_DELAY);
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if (dummy == 200) {
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dummy = 0;
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}
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dummy++;
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/* Check if the MBUFs are available */
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if (os_msys_num_free() >= MIN_REQUIRED_MBUF) {
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om = ble_hs_mbuf_from_flat(payload, sizeof(payload));
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if (om == NULL) {
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/* Memory not available for mbuf */
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ESP_LOGE(tag, "No MBUFs available from pool, retry..");
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vTaskDelay(100 / portTICK_PERIOD_MS);
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om = ble_hs_mbuf_from_flat(payload, sizeof(payload));
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assert(om != NULL);
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}
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rc = ble_gatts_notify_custom(conn_handle, notify_handle, om);
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if (rc != 0) {
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ESP_LOGE(tag, "Error while sending notification; rc = %d", rc);
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notify_count -= 1;
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xSemaphoreGive(notify_sem);
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/* Most probably error is because we ran out of mbufs (rc = 6),
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* increase the mbuf count/size from menuconfig. Though
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* inserting delay is not good solution let us keep it
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* simple for time being so that the mbufs get freed up
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* (?), of course assumption is we ran out of mbufs */
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vTaskDelay(10 / portTICK_PERIOD_MS);
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}
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} else {
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ESP_LOGE(tag, "Not enough OS_MBUFs available; reduce notify count ");
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xSemaphoreGive(notify_sem);
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notify_count -= 1;
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}
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end_time = esp_timer_get_time();
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notify_time = (end_time - start_time) / 1000 ;
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notify_count += 1;
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}
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printf("\n*********************************\n");
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ESP_LOGI(tag, "Notify throughput = %d bps, count = %d",
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(notify_count * NOTIFY_THROUGHPUT_PAYLOAD * 8) / notify_test_time, notify_count);
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printf("\n*********************************\n");
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ESP_LOGI(tag, " Notification test complete for stipulated time of %d sec", notify_test_time);
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notify_test_time = 0;
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notify_count = 0;
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break;
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}
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vTaskDelay(3000 / portTICK_PERIOD_MS);
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}
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}
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static int
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gatts_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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int rc;
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switch (event->type) {
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case BLE_GAP_EVENT_LINK_ESTAB:
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/* A new connection was established or a connection attempt failed */
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ESP_LOGI(tag, "connection %s; status = %d ",
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event->connect.status == 0 ? "established" : "failed",
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event->connect.status);
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rc = ble_att_set_preferred_mtu(PREFERRED_MTU_VALUE);
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if (rc != 0) {
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ESP_LOGE(tag, "Failed to set preferred MTU; rc = %d", rc);
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}
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if (event->connect.status != 0) {
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/* Connection failed; resume advertising */
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gatts_advertise();
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}
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rc = ble_hs_hci_util_set_data_len(event->connect.conn_handle,
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LL_PACKET_LENGTH,
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LL_PACKET_TIME);
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if (rc != 0) {
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ESP_LOGE(tag, "Set packet length failed");
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}
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conn_handle = event->connect.conn_handle;
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break;
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case BLE_GAP_EVENT_DISCONNECT:
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ESP_LOGI(tag, "disconnect; reason = %d", event->disconnect.reason);
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/* Connection terminated; resume advertising */
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gatts_advertise();
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break;
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case BLE_GAP_EVENT_CONN_UPDATE:
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/* The central has updated the connection parameters. */
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ESP_LOGI(tag, "connection updated; status=%d ",
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event->conn_update.status);
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rc = ble_gap_conn_find(event->conn_update.conn_handle, &desc);
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assert(rc == 0);
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bleprph_print_conn_desc(&desc);
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return 0;
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case BLE_GAP_EVENT_ADV_COMPLETE:
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ESP_LOGI(tag, "adv complete ");
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gatts_advertise();
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break;
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case BLE_GAP_EVENT_SUBSCRIBE:
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ESP_LOGI(tag, "subscribe event; cur_notify=%d; value handle; "
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"val_handle = %d",
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event->subscribe.cur_notify, event->subscribe.attr_handle);
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if (event->subscribe.attr_handle == notify_handle) {
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notify_state = event->subscribe.cur_notify;
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if (arg != NULL) {
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ESP_LOGI(tag, "notify test time = %d", *(int *)arg);
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notify_test_time = *((int *)arg);
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}
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xSemaphoreGive(notify_sem);
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} else if (event->subscribe.attr_handle != notify_handle) {
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notify_state = event->subscribe.cur_notify;
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}
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break;
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case BLE_GAP_EVENT_NOTIFY_TX:
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ESP_LOGD(tag, "BLE_GAP_EVENT_NOTIFY_TX success !!");
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if ((event->notify_tx.status == 0) ||
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(event->notify_tx.status == BLE_HS_EDONE)) {
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/* Send new notification i.e. give Semaphore. By definition,
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* sending new notifications should not be based on successful
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* notifications sent, but let us adopt this method to avoid too
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* many `BLE_HS_ENOMEM` errors because of continuous transfer of
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* notifications.XXX */
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xSemaphoreGive(notify_sem);
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} else {
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ESP_LOGE(tag, "BLE_GAP_EVENT_NOTIFY_TX notify tx status = %d", event->notify_tx.status);
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}
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break;
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case BLE_GAP_EVENT_MTU:
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ESP_LOGI(tag, "mtu update event; conn_handle = %d mtu = %d ",
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event->mtu.conn_handle,
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event->mtu.value);
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break;
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}
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return 0;
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}
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static void
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gatts_on_sync(void)
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{
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int rc;
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uint8_t addr_val[6] = {0};
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rc = ble_hs_id_infer_auto(0, &gatts_addr_type);
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assert(rc == 0);
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rc = ble_hs_id_copy_addr(gatts_addr_type, addr_val, NULL);
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assert(rc == 0);
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ESP_LOGI(tag, "Device Address: ");
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print_addr(addr_val);
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/* Begin advertising */
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gatts_advertise();
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}
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static void
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gatts_on_reset(int reason)
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{
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ESP_LOGE(tag, "Resetting state; reason=%d\n", reason);
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}
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void gatts_host_task(void *param)
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{
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ESP_LOGI(tag, "BLE Host Task Started");
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/* Create a counting semaphore for Notification. Can be used to track
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* successful notification txmission. Optimistically take some big number
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* for counting Semaphore */
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notify_sem = xSemaphoreCreateCounting(100, 0);
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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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vSemaphoreDelete(notify_sem);
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nimble_port_freertos_deinit();
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}
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void app_main(void)
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{
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int rc;
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/* Initialize NVS — it is used to store PHY calibration data */
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esp_err_t ret = nvs_flash_init();
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if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
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ESP_ERROR_CHECK(nvs_flash_erase());
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ret = nvs_flash_init();
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}
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ESP_ERROR_CHECK(ret);
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ret = nimble_port_init();
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if (ret != ESP_OK) {
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ESP_LOGE(tag, "Failed to init nimble %d ", ret);
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return;
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}
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/* Initialize the NimBLE host configuration */
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ble_hs_cfg.sync_cb = gatts_on_sync;
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ble_hs_cfg.reset_cb = gatts_on_reset;
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ble_hs_cfg.gatts_register_cb = gatt_svr_register_cb,
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ble_hs_cfg.store_status_cb = ble_store_util_status_rr;
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/* Initialize Notify Task */
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xTaskCreate(notify_task, "notify_task", 4096, NULL, 10, NULL);
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rc = gatt_svr_init();
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assert(rc == 0);
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/* Set the default device name */
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rc = ble_svc_gap_device_name_set(device_name);
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assert(rc == 0);
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/* Start the task */
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nimble_port_freertos_init(gatts_host_task);
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}
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