Android10.0蓝牙（Realtek）MAC地址不变

1. USE_CONTROLLER_BDADDR改为FALSE

• hardware/realtek/rtkbt/code/libbt-vendor/include/bt_vendor_rtk.h

The Bluetooth Device Aaddress source switch:
 *
 * -FALSE- (default value)
 *  Get the factory BDADDR from device's file system. Normally the BDADDR is
 *  stored in the location pointed by the PROPERTY_BT_BDADDR_PATH (defined in
 *  btif_common.h file) property.
 *
 * -TRUE-
 *  If the Bluetooth Controller has equipped with a non-volatile memory (such
 *  as BCM4330's OTP memory), the factory BDADDR can be stored in there and
 *  retrieved by the stack while enabling BT.
 *  !!! WARNING !!! Make sure that the OTP feature has been enabled in the
 *  firmware patchram (.hcd) file.
 */
#ifndef USE_CONTROLLER_BDADDR
#define USE_CONTROLLER_BDADDR   FALSE
#endif

2. 修改 蓝牙接口库初始化函数

• hardware/realtek/rtkbt/code/libbt-vendor/src/bt_vendor_rtk.c

/*****************************************************************************
**
**   BLUETOOTH VENDOR INTERFACE LIBRARY FUNCTIONS
**
*****************************************************************************/

static int init(const bt_vendor_callbacks_t* p_cb, unsigned char *local_bdaddr)
{
    ALOGI("RTKBT_RELEASE_NAME: %s",RTKBT_RELEASE_NAME);
    ALOGI("init");

    load_rtkbt_conf();
    load_rtkbt_stack_conf();
    if (p_cb == NULL)
    {
        ALOGE("init failed with no user callbacks!");
        return -1;
    }

    userial_vendor_init(rtkbt_device_node);

    if(rtkbt_transtype & RTKBT_TRANS_UART) {
        upio_init();
        ALOGE("bt_wake_up_host_mode_set(1)");
        bt_wake_up_host_mode_set(1);
    }

    /* store reference to user callbacks */
    bt_vendor_cbacks = (bt_vendor_callbacks_t *) p_cb;

    /* This is handed over from the stack */
    memcpy(vnd_local_bd_addr, local_bdaddr, 6);
    //byte_reverse(vnd_local_bd_addr, 6); //去掉字节反转

    if(rtk_btsnoop_dump)
        rtk_btsnoop_open();
    if(rtk_btsnoop_net_dump)
        rtk_btsnoop_net_open();

    return 0;
}

3. 修改对蓝牙配置文件的解析

• hardware/realtek/rtkbt/code/libbt-vendor/src/hardware_uart.c

    for (i=0; i<config_len;)
    {
        switch(le16_to_cpu(entry->offset))
        {
            case 0xc:
            {
                p = (uint8_t *)entry->entry_data;
                STREAM_TO_UINT32(baudrate, p);
                if (entry->entry_len >= 12)
                {
                    hw_cfg_cb.hw_flow_cntrl |= 0x80; /* bit7 set hw flow control */
                    if (entry->entry_data[12] & 0x04) /* offset 0x18, bit2 */
                        hw_cfg_cb.hw_flow_cntrl |= 1; /* bit0 enable hw flow control */
                }

                ALOGI("config baud rate to :0x%08x, hwflowcontrol:0x%x, 0x%x", baudrate, entry->entry_data[12], hw_cfg_cb.hw_flow_cntrl);
                break;
            }
#if (USE_CONTROLLER_BDADDR == FALSE) //增加以下代码
            case 0x44:
            case 0x3c:
            {
                 int j=0;
                 for (j=0; j<entry->entry_len; j++)
                     entry->entry_data[j] = bt_addr[entry->entry_len - 1- j];
                 ALOGI("rtk_parse_config_file: DO NOT USE_CONTROLLER_BDADDR, config has bdaddr");
                 ALOGI("rtk_parse_config_file : CONFIG_ADDR is: %02X:%02X:%02X:%02X:%02X:%02X",
                    bt_addr[0], bt_addr[1],
                    bt_addr[2], bt_addr[3],
                    bt_addr[4], bt_addr[5]);
                 break;
            }
#endif
            case 0x017a:
            {
                if(mac_offset == CONFIG_MAC_OFFSET_GEN_1_2)
                {
                    p = (uint8_t *)entry->entry_data;
                    STREAM_TO_UINT8(heartbeat_buf, p);
                    if((heartbeat_buf & 0x02) && (heartbeat_buf & 0x10))
                        hw_cfg_cb.heartbeat = 1;
                    else
                        hw_cfg_cb.heartbeat = 0;

                    ALOGI("config 0x017a heartbeat = %d",hw_cfg_cb.heartbeat);
                }
                break;
            }
            case 0x01be:
            {
                if(mac_offset == CONFIG_MAC_OFFSET_GEN_3PLUS || mac_offset == CONFIG_MAC_OFFSET_GEN_4PLUS)
                {
                    p = (uint8_t *)entry->entry_data;
                    STREAM_TO_UINT8(heartbeat_buf, p);
                    if((heartbeat_buf & 0x02) && (heartbeat_buf & 0x10))
                        hw_cfg_cb.heartbeat = 1;
                    else
                        hw_cfg_cb.heartbeat = 0;

                    ALOGI("config 0x01be heartbeat = %d",hw_cfg_cb.heartbeat);
                }
                break;
            }
            default:
                ALOGI("config offset(0x%x),length(0x%x)", entry->offset, entry->entry_len);
                break;
        }

• 总结
  rtk_parse_config_file函数会解析蓝牙的配置文件，配置文件中的0x44后面的字节代表地址的长度与MAC地址值。