234 lines
7.7 KiB
C
234 lines
7.7 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <stdio.h>
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#include <string.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "bt.h"
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#include "esp_log.h"
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static const char *tag = "BLE_ADV";
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#define HCI_H4_CMD_PREAMBLE_SIZE (4)
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/* HCI Command opcode group field(OGF) */
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#define HCI_GRP_HOST_CONT_BASEBAND_CMDS (0x03 << 10) /* 0x0C00 */
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#define HCI_GRP_BLE_CMDS (0x08 << 10)
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#define HCI_RESET (0x0003 | HCI_GRP_HOST_CONT_BASEBAND_CMDS)
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#define HCI_BLE_WRITE_ADV_ENABLE (0x000A | HCI_GRP_BLE_CMDS)
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#define HCI_BLE_WRITE_ADV_PARAMS (0x0006 | HCI_GRP_BLE_CMDS)
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#define HCI_BLE_WRITE_ADV_DATA (0x0008 | HCI_GRP_BLE_CMDS)
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#define HCIC_PARAM_SIZE_WRITE_ADV_ENABLE (1)
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#define HCIC_PARAM_SIZE_BLE_WRITE_ADV_PARAMS (15)
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#define HCIC_PARAM_SIZE_BLE_WRITE_ADV_DATA (31)
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#define BD_ADDR_LEN (6) /* Device address length */
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typedef uint8_t bd_addr_t[BD_ADDR_LEN]; /* Device address */
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#define UINT16_TO_STREAM(p, u16) {*(p)++ = (uint8_t)(u16); *(p)++ = (uint8_t)((u16) >> 8);}
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#define UINT8_TO_STREAM(p, u8) {*(p)++ = (uint8_t)(u8);}
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#define BDADDR_TO_STREAM(p, a) {int ijk; for (ijk = 0; ijk < BD_ADDR_LEN; ijk++) *(p)++ = (uint8_t) a[BD_ADDR_LEN - 1 - ijk];}
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#define ARRAY_TO_STREAM(p, a, len) {int ijk; for (ijk = 0; ijk < len; ijk++) *(p)++ = (uint8_t) a[ijk];}
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enum {
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H4_TYPE_COMMAND = 1,
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H4_TYPE_ACL = 2,
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H4_TYPE_SCO = 3,
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H4_TYPE_EVENT = 4
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};
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static uint8_t hci_cmd_buf[128];
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/*
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* @brief: BT controller callback function, used to notify the upper layer that
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* controller is ready to receive command
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*/
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static void controller_rcv_pkt_ready(void)
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{
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printf("controller rcv pkt ready\n");
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}
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/*
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* @brief: BT controller callback function, to transfer data packet to upper
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* controller is ready to receive command
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*/
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static int host_rcv_pkt(uint8_t *data, uint16_t len)
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{
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printf("host rcv pkt: ");
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for (uint16_t i = 0; i < len; i++) {
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printf("%02x", data[i]);
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}
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printf("\n");
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return 0;
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}
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static esp_vhci_host_callback_t vhci_host_cb = {
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controller_rcv_pkt_ready,
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host_rcv_pkt
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};
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static uint16_t make_cmd_reset(uint8_t *buf)
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{
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UINT8_TO_STREAM (buf, H4_TYPE_COMMAND);
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UINT16_TO_STREAM (buf, HCI_RESET);
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UINT8_TO_STREAM (buf, 0);
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return HCI_H4_CMD_PREAMBLE_SIZE;
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}
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static uint16_t make_cmd_ble_set_adv_enable (uint8_t *buf, uint8_t adv_enable)
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{
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UINT8_TO_STREAM (buf, H4_TYPE_COMMAND);
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UINT16_TO_STREAM (buf, HCI_BLE_WRITE_ADV_ENABLE);
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UINT8_TO_STREAM (buf, HCIC_PARAM_SIZE_WRITE_ADV_ENABLE);
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UINT8_TO_STREAM (buf, adv_enable);
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return HCI_H4_CMD_PREAMBLE_SIZE + HCIC_PARAM_SIZE_WRITE_ADV_ENABLE;
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}
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static uint16_t make_cmd_ble_set_adv_param (uint8_t *buf, uint16_t adv_int_min, uint16_t adv_int_max,
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uint8_t adv_type, uint8_t addr_type_own,
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uint8_t addr_type_dir, bd_addr_t direct_bda,
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uint8_t channel_map, uint8_t adv_filter_policy)
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{
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UINT8_TO_STREAM (buf, H4_TYPE_COMMAND);
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UINT16_TO_STREAM (buf, HCI_BLE_WRITE_ADV_PARAMS);
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UINT8_TO_STREAM (buf, HCIC_PARAM_SIZE_BLE_WRITE_ADV_PARAMS );
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UINT16_TO_STREAM (buf, adv_int_min);
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UINT16_TO_STREAM (buf, adv_int_max);
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UINT8_TO_STREAM (buf, adv_type);
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UINT8_TO_STREAM (buf, addr_type_own);
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UINT8_TO_STREAM (buf, addr_type_dir);
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BDADDR_TO_STREAM (buf, direct_bda);
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UINT8_TO_STREAM (buf, channel_map);
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UINT8_TO_STREAM (buf, adv_filter_policy);
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return HCI_H4_CMD_PREAMBLE_SIZE + HCIC_PARAM_SIZE_BLE_WRITE_ADV_PARAMS;
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}
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static uint16_t make_cmd_ble_set_adv_data(uint8_t *buf, uint8_t data_len, uint8_t *p_data)
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{
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UINT8_TO_STREAM (buf, H4_TYPE_COMMAND);
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UINT16_TO_STREAM (buf, HCI_BLE_WRITE_ADV_DATA);
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UINT8_TO_STREAM (buf, HCIC_PARAM_SIZE_BLE_WRITE_ADV_DATA + 1);
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memset(buf, 0, HCIC_PARAM_SIZE_BLE_WRITE_ADV_DATA);
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if (p_data != NULL && data_len > 0) {
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if (data_len > HCIC_PARAM_SIZE_BLE_WRITE_ADV_DATA) {
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data_len = HCIC_PARAM_SIZE_BLE_WRITE_ADV_DATA;
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}
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UINT8_TO_STREAM (buf, data_len);
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ARRAY_TO_STREAM (buf, p_data, data_len);
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}
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return HCI_H4_CMD_PREAMBLE_SIZE + HCIC_PARAM_SIZE_BLE_WRITE_ADV_DATA + 1;
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}
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static void hci_cmd_send_reset(void)
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{
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uint16_t sz = make_cmd_reset (hci_cmd_buf);
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esp_vhci_host_send_packet(hci_cmd_buf, sz);
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}
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static void hci_cmd_send_ble_adv_start(void)
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{
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uint16_t sz = make_cmd_ble_set_adv_enable (hci_cmd_buf, 1);
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esp_vhci_host_send_packet(hci_cmd_buf, sz);
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}
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static void hci_cmd_send_ble_set_adv_param(void)
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{
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uint16_t adv_intv_min = 256; // 160ms
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uint16_t adv_intv_max = 256; // 160ms
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uint8_t adv_type = 0; // connectable undirected advertising (ADV_IND)
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uint8_t own_addr_type = 0; // Public Device Address
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uint8_t peer_addr_type = 0; // Public Device Address
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uint8_t peer_addr[6] = {0x80, 0x81, 0x82, 0x83, 0x84, 0x85};
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uint8_t adv_chn_map = 0x07; // 37, 38, 39
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uint8_t adv_filter_policy = 0; // Process All Conn and Scan
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uint16_t sz = make_cmd_ble_set_adv_param(hci_cmd_buf,
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adv_intv_min,
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adv_intv_max,
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adv_type,
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own_addr_type,
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peer_addr_type,
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peer_addr,
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adv_chn_map,
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adv_filter_policy);
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esp_vhci_host_send_packet(hci_cmd_buf, sz);
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}
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static void hci_cmd_send_ble_set_adv_data(void)
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{
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char *adv_name = "ESP-BLE-HELLO";
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uint8_t name_len = (uint8_t)strlen(adv_name);
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uint8_t adv_data[31] = {0x02, 0x01, 0x06, 0x0, 0x09};
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uint8_t adv_data_len;
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adv_data[3] = name_len + 1;
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for (int i = 0; i < name_len; i++) {
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adv_data[5 + i] = (uint8_t)adv_name[i];
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}
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adv_data_len = 5 + name_len;
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uint16_t sz = make_cmd_ble_set_adv_data(hci_cmd_buf, adv_data_len, (uint8_t *)adv_data);
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esp_vhci_host_send_packet(hci_cmd_buf, sz);
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}
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/*
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* @brief: send HCI commands to perform BLE advertising;
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*/
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void bleAdvtTask(void *pvParameters)
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{
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int cmd_cnt = 0;
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bool send_avail = false;
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esp_vhci_host_register_callback(&vhci_host_cb);
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printf("BLE advt task start\n");
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while (1) {
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vTaskDelay(1000 / portTICK_PERIOD_MS);
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send_avail = esp_vhci_host_check_send_available();
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if (send_avail) {
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switch (cmd_cnt) {
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case 0: hci_cmd_send_reset(); ++cmd_cnt; break;
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case 1: hci_cmd_send_ble_set_adv_param(); ++cmd_cnt; break;
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case 2: hci_cmd_send_ble_set_adv_data(); ++cmd_cnt; break;
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case 3: hci_cmd_send_ble_adv_start(); ++cmd_cnt; break;
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}
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}
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printf("BLE Advertise, flag_send_avail: %d, cmd_sent: %d\n", send_avail, cmd_cnt);
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}
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}
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void app_main()
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{
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esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();
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if (esp_bt_controller_init(&bt_cfg) != ESP_OK) {
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ESP_LOGI(tag, "Bluetooth controller initialize failed");
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return;
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}
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if (esp_bt_controller_enable(ESP_BT_MODE_BTDM) != ESP_OK) {
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ESP_LOGI(tag, "Bluetooth controller enable failed");
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return;
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}
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xTaskCreatePinnedToCore(&bleAdvtTask, "bleAdvtTask", 2048, NULL, 5, NULL, 0);
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}
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