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arduino-esp32/libraries/SimpleBLE/src/SimpleBLE.cpp
me-no-dev 1d759380a6 Major IDF and Arduino Update 
WiFi and BlueTooth can now be started and stopped at will.
basic functions added to esp32-hal to start and stop the BT radio
SimpleBLE class added to show the most basic functionality
Example to show how to switch between BT, WiFi or Both
2017-02-23 01:11:57 +02:00

339 lines
11 KiB
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// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "SimpleBLE.h"
#include "esp32-hal-log.h"
/* HCI Command opcode group field(OGF) */
#define HCI_GRP_HOST_CONT_BASEBAND_CMDS (0x03 << 10) /* 0x0C00 */
#define HCI_GRP_BLE_CMDS (0x08 << 10)
/* HCI Command opcode command field(OCF) */
#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 HCI_H4_CMD_PREAMBLE_SIZE (4)
#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)
/* EIR/AD data type definitions */
#define BT_DATA_FLAGS 0x01 /* AD flags */
#define BT_DATA_UUID16_SOME 0x02 /* 16-bit UUID, more available */
#define BT_DATA_UUID16_ALL 0x03 /* 16-bit UUID, all listed */
#define BT_DATA_UUID32_SOME 0x04 /* 32-bit UUID, more available */
#define BT_DATA_UUID32_ALL 0x05 /* 32-bit UUID, all listed */
#define BT_DATA_UUID128_SOME 0x06 /* 128-bit UUID, more available */
#define BT_DATA_UUID128_ALL 0x07 /* 128-bit UUID, all listed */
#define BT_DATA_NAME_SHORTENED 0x08 /* Shortened name */
#define BT_DATA_NAME_COMPLETE 0x09 /* Complete name */
#define BT_DATA_TX_POWER 0x0a /* Tx Power */
#define BT_DATA_SOLICIT16 0x14 /* Solicit UUIDs, 16-bit */
#define BT_DATA_SOLICIT128 0x15 /* Solicit UUIDs, 128-bit */
#define BT_DATA_SVC_DATA16 0x16 /* Service data, 16-bit UUID */
#define BT_DATA_GAP_APPEARANCE 0x19 /* GAP appearance */
#define BT_DATA_SOLICIT32 0x1f /* Solicit UUIDs, 32-bit */
#define BT_DATA_SVC_DATA32 0x20 /* Service data, 32-bit UUID */
#define BT_DATA_SVC_DATA128 0x21 /* Service data, 128-bit UUID */
#define BT_DATA_MANUFACTURER_DATA 0xff /* Manufacturer Specific Data */
/* Advertising types */
#define BLE_GAP_ADV_TYPE_ADV_IND 0x00
#define BLE_GAP_ADV_TYPE_ADV_DIRECT_IND 0x01
#define BLE_GAP_ADV_TYPE_ADV_SCAN_IND 0x02
#define BLE_GAP_ADV_TYPE_ADV_NONCONN_IND 0x03
/* Advertising Discovery Flags */
#define BLE_GAP_ADV_FLAG_LE_LIMITED_DISC_MODE (0x01)
#define BLE_GAP_ADV_FLAG_LE_GENERAL_DISC_MODE (0x02)
#define BLE_GAP_ADV_FLAG_BR_EDR_NOT_SUPPORTED (0x04)
#define BLE_GAP_ADV_FLAG_LE_BR_EDR_CONTROLLER (0x08)
#define BLE_GAP_ADV_FLAG_LE_BR_EDR_HOST (0x10)
#define BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE (BLE_GAP_ADV_FLAG_LE_LIMITED_DISC_MODE | BLE_GAP_ADV_FLAG_BR_EDR_NOT_SUPPORTED)
#define BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE (BLE_GAP_ADV_FLAG_LE_GENERAL_DISC_MODE | BLE_GAP_ADV_FLAG_BR_EDR_NOT_SUPPORTED)
/* Advertising Filter Policies */
#define BLE_GAP_ADV_FP_ANY 0x00
#define BLE_GAP_ADV_FP_FILTER_SCANREQ 0x01
#define BLE_GAP_ADV_FP_FILTER_CONNREQ 0x02
#define BLE_GAP_ADV_FP_FILTER_BOTH 0x03
/* Advertising Device Address Types */
#define BLE_GAP_ADDR_TYPE_PUBLIC 0x00
#define BLE_GAP_ADDR_TYPE_RANDOM_STATIC 0x01
#define BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE 0x02
#define BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_NON_RESOLVABLE 0x03
/* GAP Advertising Channel Maps */
#define GAP_ADVCHAN_37 0x01
#define GAP_ADVCHAN_38 0x02
#define GAP_ADVCHAN_39 0x04
#define GAP_ADVCHAN_ALL GAP_ADVCHAN_37 | GAP_ADVCHAN_38 | GAP_ADVCHAN_39
/* GAP Filter Policies */
#define BLE_GAP_ADV_FP_ANY 0x00
#define BLE_GAP_ADV_FP_FILTER_SCANREQ 0x01
#define BLE_GAP_ADV_FP_FILTER_CONNREQ 0x02
#define BLE_GAP_ADV_FP_FILTER_BOTH 0x03
#define BD_ADDR_LEN (6) /* Device address length */
/*
* BLE System
*
* */
/* HCI H4 message type definitions */
enum {
H4_TYPE_COMMAND = 1,
H4_TYPE_ACL = 2,
H4_TYPE_SCO = 3,
H4_TYPE_EVENT = 4
};
volatile bool _vhci_host_send_available = false;
volatile bool _vhci_host_command_running = false;
static uint16_t _vhci_host_command = 0x0000;
static uint8_t _vhci_host_command_result = 0x00;
//controller is ready to receive command
static void _on_tx_ready(void)
{
_vhci_host_send_available = true;
}
/*
static void _dump_buf(const char * txt, uint8_t *data, uint16_t len){
log_printf("%s[%u]:", txt, len);
for (uint16_t i=0; i<len; i++)
log_printf(" %02x", data[i]);
log_printf("\n");
}
*/
//controller has a packet
static int _on_rx_data(uint8_t *data, uint16_t len)
{
if(len == 7 && *data == 0x04){
//baseband response
uint16_t cmd = (((uint16_t)data[5] << 8) | data[4]);
uint8_t res = data[6];
if(_vhci_host_command_running && _vhci_host_command == cmd){
//_dump_buf("BLE: res", data, len);
_vhci_host_command_result = res;
_vhci_host_command_running = false;
return 0;
} else if(cmd == 0){
log_e("error %u", res);
}
}
//_dump_buf("BLE: rx", data, len);
return 0;
}
static esp_vhci_host_callback_t vhci_host_cb = {
_on_tx_ready,
_on_rx_data
};
static bool _esp_ble_start()
{
if(btStart()){
esp_vhci_host_register_callback(&vhci_host_cb);
uint8_t i = 0;
while(!esp_vhci_host_check_send_available() && i++ < 100){
delay(10);
}
if(i >= 100){
log_e("esp_vhci_host_check_send_available failed");
return false;
}
_vhci_host_send_available = true;
} else
log_e("BT Failed");
return true;
}
static bool _esp_ble_stop()
{
if(btStarted()){
_vhci_host_send_available = false;
btStop();
esp_vhci_host_register_callback(NULL);
}
return true;
}
//public
static uint8_t ble_send_cmd(uint16_t cmd, uint8_t * data, uint8_t len){
static uint8_t buf[36];
if(len > 32){
//too much data
return 2;
}
uint16_t i = 0;
while(!_vhci_host_send_available && i++ < 1000){
delay(1);
}
if(i >= 1000){
log_e("_vhci_host_send_available failed");
return 1;
}
uint8_t outlen = len + HCI_H4_CMD_PREAMBLE_SIZE;
buf[0] = H4_TYPE_COMMAND;
buf[1] = (uint8_t)(cmd & 0xFF);
buf[2] = (uint8_t)(cmd >> 8);
buf[3] = len;
if(len){
memcpy(buf+4, data, len);
}
_vhci_host_send_available = false;
_vhci_host_command_running = true;
_vhci_host_command = cmd;
//log_printf("BLE: cmd: 0x%04X, data[%u]:", cmd, len);
//for (uint16_t i=0; i<len; i++) log_printf(" %02x", buf[i+4]);
//log_printf("\n");
esp_vhci_host_send_packet(buf, outlen);
while(_vhci_host_command_running);
int res = _vhci_host_command_result;
//log_printf("BLE: cmd: 0x%04X, res: %u\n", cmd, res);
return res;
}
/*
* BLE Arduino
*
* */
enum {
UNIT_0_625_MS = 625, /* Number of microseconds in 0.625 milliseconds. */
UNIT_1_25_MS = 1250, /* Number of microseconds in 1.25 milliseconds. */
UNIT_10_MS = 10000 /* Number of microseconds in 10 milliseconds. */
};
/* BLE Advertising parameters struct */
typedef struct ble_gap_adv_params_s {
uint8_t type;
uint8_t own_addr_type;
uint8_t addr_type;
uint8_t addr[BD_ADDR_LEN];
uint8_t fp; // filter policy
uint16_t interval_min; // minimum advertising interval between 0x0020 and 0x4000 in 0.625 ms units (20ms to 10.24s)
uint16_t interval_max;
uint8_t chn_map;
} ble_adv_params_t;
#define MSEC_TO_UNITS(TIME, RESOLUTION) (((TIME) * 1000) / (RESOLUTION))
#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 i; for (i = 0; i < BD_ADDR_LEN; i++) *(p)++ = (uint8_t) a[BD_ADDR_LEN - 1 - i];}
#define ARRAY_TO_STREAM(p, a, len) {int i; for (i = 0; i < len; i++) *(p)++ = (uint8_t) a[i];}
SimpleBLE::SimpleBLE()
{
uint8_t peerAddr[BD_ADDR_LEN] = {0x80, 0x81, 0x82, 0x83, 0x84, 0x85};
_ble_adv_param = (ble_adv_params_t*)malloc(sizeof(ble_adv_params_t));
memset(_ble_adv_param, 0x00, sizeof(ble_adv_params_t));
_ble_adv_param->type = BLE_GAP_ADV_TYPE_ADV_NONCONN_IND;//not connectable
_ble_adv_param->chn_map = GAP_ADVCHAN_ALL; // 37, 38, 39 channels
_ble_adv_param->fp = 0;//any
_ble_adv_param->interval_min = 512;
_ble_adv_param->interval_max = 1024;
_ble_adv_param->addr_type = 0;//public
memcpy(_ble_adv_param->addr, peerAddr, BD_ADDR_LEN);
local_name = "esp32";
}
SimpleBLE::~SimpleBLE(void)
{
free(_ble_adv_param);
_esp_ble_stop();
}
bool SimpleBLE::begin(String localName)
{
if(!_esp_ble_start()){
return false;
}
ble_send_cmd(HCI_RESET, NULL, 0);
if(localName.length()){
local_name = localName;
}
_ble_send_adv_param();
_ble_send_adv_data();
uint8_t adv_enable = 1;
ble_send_cmd(HCI_BLE_WRITE_ADV_ENABLE, &adv_enable, HCIC_PARAM_SIZE_WRITE_ADV_ENABLE);
return true;
}
void SimpleBLE::end()
{
uint8_t adv_enable = 0;
ble_send_cmd(HCI_BLE_WRITE_ADV_ENABLE, &adv_enable, HCIC_PARAM_SIZE_WRITE_ADV_ENABLE);
ble_send_cmd(HCI_RESET, NULL, 0);
_esp_ble_stop();
}
void SimpleBLE::_ble_send_adv_param(void)
{
uint8_t dbuf[HCIC_PARAM_SIZE_BLE_WRITE_ADV_PARAMS];
uint8_t *buf = dbuf;
UINT16_TO_STREAM (buf, _ble_adv_param->interval_min);
UINT16_TO_STREAM (buf, _ble_adv_param->interval_max);
UINT8_TO_STREAM (buf, _ble_adv_param->type);
UINT8_TO_STREAM (buf, _ble_adv_param->own_addr_type);
UINT8_TO_STREAM (buf, _ble_adv_param->addr_type);
ARRAY_TO_STREAM (buf, _ble_adv_param->addr, BD_ADDR_LEN);
UINT8_TO_STREAM (buf, _ble_adv_param->chn_map);
UINT8_TO_STREAM (buf, _ble_adv_param->fp);
ble_send_cmd(HCI_BLE_WRITE_ADV_PARAMS, dbuf, HCIC_PARAM_SIZE_BLE_WRITE_ADV_PARAMS);
}
void SimpleBLE::_ble_send_adv_data(void)
{
uint8_t adv_data[HCIC_PARAM_SIZE_BLE_WRITE_ADV_DATA + 1] = {
0x03, 0x02, BT_DATA_FLAGS, BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE
};
//zerofill the buffer
memset(adv_data+4, 0x00, HCIC_PARAM_SIZE_BLE_WRITE_ADV_DATA-4);
uint8_t adv_data_len = 4;
// Advertising data device local name
uint8_t name_len = (uint8_t) local_name.length();
adv_data[adv_data_len++] = name_len + 1;
adv_data[adv_data_len++] = BT_DATA_NAME_COMPLETE;
for (int i=0; i<name_len; i++) {
adv_data[adv_data_len++] = (uint8_t) local_name.charAt(i);
}
//send data
adv_data[0] = adv_data_len - 1;
ble_send_cmd(HCI_BLE_WRITE_ADV_DATA, (uint8_t *)adv_data, HCIC_PARAM_SIZE_BLE_WRITE_ADV_DATA + 1);
}
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