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BLE ADV Demo

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#
# This is a project Makefile. It is assumed the directory this Makefile resides in is a
# project subdirectory.
#
PROJECT_NAME := ble_adv
include $(IDF_PATH)/make/project.mk

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ESP-IDF ble_advertising app
====================
This is a BLE advertising demo with virtual HCI interface. Send Reset/ADV_PARAM/ADV_DATA/ADV_ENABLE HCI command for BLE advertising.

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examples/04_ble_adv/main/app_bt.c Executable file
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#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "bt.h"
#include <string.h>
#define HCI_H4_CMD_PREAMBLE_SIZE (4)
/* HCI Command opcode group field(OGF) */
#define HCI_GRP_HOST_CONT_BASEBAND_CMDS (0x03 << 10) /* 0x0C00 */
#define HCI_GRP_BLE_CMDS (0x08 << 10)
#define HCI_RESET (0x0003 | HCI_GRP_HOST_CONT_BASEBAND_CMDS)
#define HCI_BLE_WRITE_ADV_ENABLE (0x000A | HCI_GRP_BLE_CMDS)
#define HCI_BLE_WRITE_ADV_PARAMS (0x0006 | HCI_GRP_BLE_CMDS)
#define HCI_BLE_WRITE_ADV_DATA (0x0008 | HCI_GRP_BLE_CMDS)
#define HCIC_PARAM_SIZE_WRITE_ADV_ENABLE (1)
#define HCIC_PARAM_SIZE_BLE_WRITE_ADV_PARAMS (15)
#define HCIC_PARAM_SIZE_BLE_WRITE_ADV_DATA (31)
#define BD_ADDR_LEN (6) /* Device address length */
typedef uint8_t bd_addr_t[BD_ADDR_LEN]; /* Device address */
#define UINT16_TO_STREAM(p, u16) {*(p)++ = (uint8_t)(u16); *(p)++ = (uint8_t)((u16) >> 8);}
#define UINT8_TO_STREAM(p, u8) {*(p)++ = (uint8_t)(u8);}
#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];}
#define ARRAY_TO_STREAM(p, a, len) {int ijk; for (ijk = 0; ijk < len; ijk++) *(p)++ = (uint8_t) a[ijk];}
enum {
H4_TYPE_COMMAND = 1,
H4_TYPE_ACL = 2,
H4_TYPE_SCO = 3,
H4_TYPE_EVENT = 4
};
static uint8_t hci_cmd_buf[128];
/*
* @brief: BT controller callback function, used to notify the upper layer that
* controller is ready to receive command
*/
static void controller_rcv_pkt_ready(void)
{
printf("controller rcv pkt ready\n");
}
/*
* @brief: BT controller callback function, to transfer data packet to upper
* controller is ready to receive command
*/
static int host_rcv_pkt(uint8_t *data, uint16_t len)
{
printf("host rcv pkt: ");
for (uint16_t i=0; i<len; i++)
printf("%02x", data[i]);
printf("\n");
return 0;
}
static vhci_host_callback_t vhci_host_cb = {
controller_rcv_pkt_ready,
host_rcv_pkt
};
static uint16_t make_cmd_reset(uint8_t *buf)
{
UINT8_TO_STREAM (buf, H4_TYPE_COMMAND);
UINT16_TO_STREAM (buf, HCI_RESET);
UINT8_TO_STREAM (buf, 0);
return HCI_H4_CMD_PREAMBLE_SIZE;
}
static uint16_t make_cmd_ble_set_adv_enable (uint8_t *buf, uint8_t adv_enable)
{
UINT8_TO_STREAM (buf, H4_TYPE_COMMAND);
UINT16_TO_STREAM (buf, HCI_BLE_WRITE_ADV_ENABLE);
UINT8_TO_STREAM (buf, HCIC_PARAM_SIZE_WRITE_ADV_ENABLE);
UINT8_TO_STREAM (buf, adv_enable);
return HCI_H4_CMD_PREAMBLE_SIZE + HCIC_PARAM_SIZE_WRITE_ADV_ENABLE;
}
static uint16_t make_cmd_ble_set_adv_param (uint8_t *buf, uint16_t adv_int_min, uint16_t adv_int_max,
uint8_t adv_type, uint8_t addr_type_own,
uint8_t addr_type_dir, bd_addr_t direct_bda,
uint8_t channel_map, uint8_t adv_filter_policy)
{
UINT8_TO_STREAM (buf, H4_TYPE_COMMAND);
UINT16_TO_STREAM (buf, HCI_BLE_WRITE_ADV_PARAMS);
UINT8_TO_STREAM (buf, HCIC_PARAM_SIZE_BLE_WRITE_ADV_PARAMS );
UINT16_TO_STREAM (buf, adv_int_min);
UINT16_TO_STREAM (buf, adv_int_max);
UINT8_TO_STREAM (buf, adv_type);
UINT8_TO_STREAM (buf, addr_type_own);
UINT8_TO_STREAM (buf, addr_type_dir);
BDADDR_TO_STREAM (buf, direct_bda);
UINT8_TO_STREAM (buf, channel_map);
UINT8_TO_STREAM (buf, adv_filter_policy);
return HCI_H4_CMD_PREAMBLE_SIZE + HCIC_PARAM_SIZE_BLE_WRITE_ADV_PARAMS;
}
static uint16_t make_cmd_ble_set_adv_data(uint8_t *buf, uint8_t data_len, uint8_t *p_data)
{
UINT8_TO_STREAM (buf, H4_TYPE_COMMAND);
UINT16_TO_STREAM (buf, HCI_BLE_WRITE_ADV_DATA);
UINT8_TO_STREAM (buf, HCIC_PARAM_SIZE_BLE_WRITE_ADV_DATA + 1);
memset(buf, 0, HCIC_PARAM_SIZE_BLE_WRITE_ADV_DATA);
if (p_data != NULL && data_len > 0) {
if (data_len > HCIC_PARAM_SIZE_BLE_WRITE_ADV_DATA)
data_len = HCIC_PARAM_SIZE_BLE_WRITE_ADV_DATA;
UINT8_TO_STREAM (buf, data_len);
ARRAY_TO_STREAM (buf, p_data, data_len);
}
return HCI_H4_CMD_PREAMBLE_SIZE + HCIC_PARAM_SIZE_BLE_WRITE_ADV_DATA + 1;
}
static void hci_cmd_send_reset(void)
{
uint16_t sz = make_cmd_reset (hci_cmd_buf);
API_vhci_host_send_packet(hci_cmd_buf, sz);
}
static void hci_cmd_send_ble_adv_start(void)
{
uint16_t sz = make_cmd_ble_set_adv_enable (hci_cmd_buf, 1);
API_vhci_host_send_packet(hci_cmd_buf, sz);
}
static void hci_cmd_send_ble_set_adv_param(void)
{
uint16_t adv_intv_min = 256; // 160ms
uint16_t adv_intv_max = 256; // 160ms
uint8_t adv_type = 0; // connectable undirected advertising (ADV_IND)
uint8_t own_addr_type = 0; // Public Device Address
uint8_t peer_addr_type = 0; // Public Device Address
uint8_t peer_addr[6] = {0x80, 0x81, 0x82, 0x83, 0x84, 0x85};
uint8_t adv_chn_map = 0x07; // 37, 38, 39
uint8_t adv_filter_policy = 0; // Process All Conn and Scan
uint16_t sz = make_cmd_ble_set_adv_param(hci_cmd_buf,
adv_intv_min,
adv_intv_max,
adv_type,
own_addr_type,
peer_addr_type,
peer_addr,
adv_chn_map,
adv_filter_policy);
API_vhci_host_send_packet(hci_cmd_buf, sz);
}
static void hci_cmd_send_ble_set_adv_data(void)
{
char *adv_name = "ESP-BLE-HELLO";
uint8_t name_len = (uint8_t)strlen(adv_name);
uint8_t adv_data[31] = {0x02, 0x01, 0x06, 0x0, 0x09};
uint8_t adv_data_len;
adv_data[3] = name_len + 1;
for (int i=0; i<name_len; i++) {
adv_data[5+i] = (uint8_t)adv_name[i];
}
adv_data_len = 5 + name_len;
uint16_t sz = make_cmd_ble_set_adv_data(hci_cmd_buf, adv_data_len, (uint8_t *)adv_data);
API_vhci_host_send_packet(hci_cmd_buf, sz);
}
/*
* @brief: send HCI commands to perform BLE advertising;
*/
void bleAdvtTask(void *pvParameters)
{
int cmd_cnt = 0;
bool send_avail = false;
API_vhci_host_register_callback(&vhci_host_cb);
printf("BLE advt task start\n");
while (1) {
vTaskDelay(1000 / portTICK_PERIOD_MS);
send_avail = API_vhci_host_check_send_available();
if (send_avail) {
switch (cmd_cnt) {
case 0: hci_cmd_send_reset(); ++cmd_cnt; break;
case 1: hci_cmd_send_ble_set_adv_param(); ++cmd_cnt; break;
case 2: hci_cmd_send_ble_set_adv_data(); ++cmd_cnt; break;
case 3: hci_cmd_send_ble_adv_start(); ++cmd_cnt; break;
}
}
printf("BLE Advertise, flag_send_avail: %d, cmd_sent: %d\n", send_avail, cmd_cnt);
}
}
void bt_app_main()
{
xTaskCreatePinnedToCore(&bleAdvtTask, "bleAdvtTask", 2048, NULL, 5, NULL, 0);
}

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#
# Main Makefile. This is basically the same as a component makefile.
#
# This Makefile should, at the very least, just include $(SDK_PATH)/make/component_common.mk. By default,
# this will take the sources in the src/ directory, compile them and link them into
# lib(subdirectory_name).a in the build directory. This behaviour is entirely configurable,
# please read the ESP-IDF documents if you need to do this.
#
include $(IDF_PATH)/make/component_common.mk