经过几天的煎熬，终于把bluez移植到了ARM环境上，终于可以开始使用了，但是在运行hci_get_route接口后提示找不到对应的设备，后来发现是蓝牙设备没有启用，下面用到命令在交叉编译的时候应该已经生成了，直接使用即可。

1.先执行hciconfig

看到设备 hci0就是蓝牙模块了

2.执行hciconfig hci0 up，然后再调用hci_get_route就OK了。

下面是测试代码，注：这是测试经典蓝牙的代码，非低功耗蓝牙

#include "./bluetooth/bluetooth.h"
#include "./bluetooth/hci.h"
#include "./bluetooth/hci_lib.h"
#include "./bluetooth/l2cap.h"
#include "./bluetooth/rfcomm.h"
#include "sdp.h"
#include "sdp_lib.h"

int main(int argc, char **argv)
{
    inquiry_info *ii = NULL;
    int max_rsp, num_rsp;
    int dev_id, sock, len, flags;
    int i;
    char addr[19] = { 0 };
    char name[248] = { 0 };

    dev_id = hci_get_route(NULL);
    sock = hci_open_dev( dev_id );
    if (dev_id < 0 || sock < 0) {
        perror("opening socket");
        exit(1);
    }

    len  = 8;
    max_rsp = 255;
    flags = IREQ_CACHE_FLUSH;
    ii = (inquiry_info*)malloc(max_rsp * sizeof(inquiry_info));
    
    num_rsp = hci_inquiry(dev_id, len, max_rsp, NULL, &ii, flags);
    if( num_rsp < 0 ) perror("hci_inquiry");

    for (i = 0; i < num_rsp; i++) {
        ba2str(&(ii+i)->bdaddr, addr);
        memset(name, 0, sizeof(name));
        if (hci_read_remote_name(sock, &(ii+i)->bdaddr, sizeof(name), 
            name, 0) < 0)
        strcpy(name, "[unknown]");
        printf("%s  %s\n", addr, name);
		sleep(1);
    }

    free( ii );
    close( sock );
    return 0;
}

bluez5.50交叉编译