Carplay 参考代码：
int UdevIsCarplay(int nVid, int nPid)//int UsbModeSwitch(pUdevStatus pStatus)
{
;
if (nVid != APPLE_IDVENDOR){
;
}
r = libusb_init(NULL);
) {
pError("failed to initialise libusb\n");
;
}
struct libusb_device_handle *devh = NULL;
devh = libusb_open_device_with_vid_pid(NULL, nVid, nPid);
if (NULL == devh) {
pError("Could not find/open device(%s)\n", strerror(errno));
r = ;goto end;
}
//libusb_device *dev = libusb_get_device(devh);
];// if tmp is {0x01, 0x00, 0x00, 0x00} support carplay;else close carplay.
memset(tmp, , );
r = libusb_control_transfer(devh, , , tmp, , );//Page 715
//r = libusb_control_transfer(devh, 0x40, 0x51, 0x01, 0, NULL, 0, 0);//Page 716 UsbModeSwitch
) {
pError("UdevIsCarplay --- get support capabilities error !!! r = %d(%s)\n", r, strerror(errno));
r = ;
}
) {
pError("short write (%d)\n", r);
r = ;
}
else {
//int nTmp = tmp[0] + (int)(tmp[1]<<8) + (int)(tmp[2]<<16) + (int)(tmp[3]<<24);
pInfo(],tmp[],tmp[],tmp[]);
])
r = ;
}
libusb_close(devh);
end:
libusb_exit(NULL);
return r ;
}
邹工：
参考代码如下：
void* UdevEventMonitorThread(void* pParam)
{
int fd;
struct udev_device *dev;
struct udev_monitor *mon;
pUdevContainer pUdevCon = (pUdevContainer)pParam;
mon = udev_monitor_new_from_netlink(pUdevCon->m_pUdev, "udev");//"kernel"或"udev"。基于"kernel"的事件通知要早于"udev"，但相关的设备结点未必创建完成
if (mon == NULL)
{
pError("udev_monitor_new_from_netlink FAILED \n");
return;
}
)
{
pError("UdevAddFilter FAILED \n");
return;
}
)
{
pError("udev_monitor_enable_receiving FAILED \n");
return;
}
UdevStatus status[];//status[0] is OTG atatus; status[1] is HOST atatus; //pUdevStatus status = calloc(2, sizeof(UdevStatus));
memset(status, , * sizeof(UdevStatus));
status[].m_eUdevStatus = status[].m_eUdevStatus = UDEVOTHER;
/* Get the file descriptor (fd) for the monitor.This fd will get passed to select() */
fd = udev_monitor_get_fd(mon);
);
struct epoll_event ev;
ev.events = EPOLLIN;
ev.data.fd = fd;
epoll_ctl(epollfd, EPOLL_CTL_ADD, fd, &ev);
];
pInfo("UdevEventMonitorThread --- start ok !!!!!!!!!!! \n");
/* This section will run continuously, calling usleep() at the end of each pass. This is to demonstrate how to use a udev_monitor in a non-blocking way. */
)
{
;
//pError("epoll_wait event start!\n");
, -);//-1 is block,>=0 is noblock;
//pWarn("epoll_wait event ok ret = %d!\n",ret);
; i < ret; i++)
{
/* Make the call to receive the device. select() ensured that this will not block. */
dev = udev_monitor_receive_device(mon);
if (dev)
{
const char* szAction = udev_device_get_action(dev);
const char* szDevNode = udev_device_get_devnode(dev);
const char* szSysPath = udev_device_get_syspath(dev);
int nStatus = SetUdevStatus(pUdevCon, szAction);//pStatus,
if(UDEVOTHER == nStatus)
{
//pDebug("nStatus = 0(OTHER);
goto end;
}
//pDebug("nActionStatus = %d\n",nStatus);
int nPort = UdevPortJudge(pUdevCon, szSysPath, nStatus);
if(OTHERPORT == nPort)
{
//pDebug("nPort = OTHERPORT(%d)\n", nPort);
goto end;
}
pUdevStatus pStatus = &status[nPort-];//status+(nPort-1)*sizeof(UdevStatus);
//pDebug(" status[%d]=(%d),pStatus->m_eUdevStatus(%d),pStatus->m_nChecked(%d)~~~~~~~~~~~~~~\n", nPort-1, nStatus,pStatus->m_eUdevStatus,pStatus->m_nChecked);
if(nStatus == UDEVCHANGE)
{
pStatus->m_eUdevStatus = nStatus;
print_all_properties(pUdevCon, pStatus, dev, "prop");
goto end;
//pDebug("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n");
}
else if(nStatus == UDEVREMOVE)
{
if(UDEVREMOVE != pStatus->m_eUdevStatus)//插入USB上电可能没有检测到设备，导致拔出状态错误
{
ResetStatus(pStatus);
if(NULL != szDevNode)
pUdevCon->m_pUdevEvent->UdevStatusProc(pUdevCon->m_eUdevPort, pStatus->m_eUdevStatus, USBNODEV, szDevNode);
else
pUdevCon->m_pUdevEvent->UdevStatusProc(pUdevCon->m_eUdevPort, pStatus->m_eUdevStatus, USBNODEV, "USBNODEV");
pUdevCon->m_eUdevPort = OTHERPORT;
}
goto end;
}
//ADD event
pStatus->m_eUdevStatus = nStatus;
)//nStatus == ADD
{
print_all_attributes(pStatus, dev, "attr");
)
{
pInfo("[DM-SMING] %d\n", __LINE__);
if(pStatus->m_eUdevType == USBHUB)
pUdevCon->m_pUdevEvent->UdevStatusProc(nPort, nStatus, USBHUB, "USBHUB");
else if(pStatus->m_eUdevType == USBOTHER)
pUdevCon->m_pUdevEvent->UdevStatusProc(nPort, nStatus, USBOTHER, "USBOTHER");
}
)
{
pInfo("[DM-SMING] %d\n", __LINE__);
int nCheck = UdevCheckContinue(pStatus, szDevNode);
)
{
pInfo("[DM-SMING] %d\n", __LINE__);
if(pStatus->m_eUdevType == USBHID)
pUdevCon->m_pUdevEvent->UdevStatusProc(nPort, nStatus, USBHID, "USBHID");
else
pUdevCon->m_pUdevEvent->UdevStatusProc(nPort, nStatus, pStatus->m_eUdevType, szDevNode);
}
}
}
end:
udev_device_unref(dev);
}
else
{
pDebug("No Device from receive_device().\n");// An error occured.
}
}
//else
// usleep(100*1000);
//fflush(stdout);
}
return;
}
static void print_all_properties(pUdevContainer pUdevCon, pUdevStatus pStatus, struct udev_device *device, const char *key)
{
struct udev_list_entry *properties;
udev_list_entry_foreach(properties, udev_device_get_properties_list_entry(device))
{
const char *szName = udev_list_entry_get_name(properties);
const char *szValue = udev_list_entry_get_value(properties);
if(NULL != szValue)
pDebug(" [%s]{%s}==\"%s\"\n", key, szName, szValue);
)
{
)
{
//通过回调给上层USBNORESPOND消息，设备节点为”USBNORESPOND“
pUdevCon->m_pUdevEvent->UdevStatusProc(pUdevCon->m_eUdevPort, pStatus->m_eUdevStatus, USBNORESPOND, "USBNORESPOND");
return;
}
}
}
}
库文件在附件中。
链接: http://pan.baidu.com/s/1qXSSB84 密码: ptgu