iphone - iPhoneでのUSBプログラミング

Question

私がしたいのは、USBポートを介してデータを送受信することだけです。公式の SDK では、MFi 以外では不可能です。

他のデバイスと有線で通信する他の方法はどれですか?提案しますか?

よろしくお願いします！

GD

Answer 1

MFI メンバーシップは、ソフトウェア開発者には必要ありません。ハードウェア開発者にのみ必要です。また、どのUSBポートを参照していますか？iPhoneの32ピンコネクタについて言及していますか？Bluetooth を使用して、いつでもハードウェア デバイスにデータを送信できます。

更新 1 -

まず第一に申し訳ありませんが、コードが複雑に見えるかもしれません。現在のプロジェクトからこれを貼り付けています。サンプル プロジェクトが必要な場合は、コメントを投稿してください。

最初に、ビューで通知を登録する必要があります。

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_accessoryDidConnect:) name:EAAccessoryDidConnectNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_accessoryDidDisconnect:) name:EAAccessoryDidDisconnectNotification object:nil];
[[EAAccessoryManager sharedAccessoryManager] registerForLocalNotifications];

次に、付属のアクセサリを見つける必要があります-

     _accessoryList = [[NSMutableArray alloc] initWithArray:[[EAAccessoryManager sharedAccessoryManager] connectedAccessories]];

次に、これが探している正しいアクセサリであることを確認してください -

for(EAAccessory *obj in _accessoryList)
    {
        if ([[obj protocolStrings] containsObject:@"com.bluebamboo.p25i"])//if find the accessory(p25) record it
        {
            [accessoryLabel setText:@"P25mi connected"]; // yup this is correct accessory!
            [obj release];
            break;
        }
    }

次に、セッションを開きます -

//if accessory not null
if(accessory)
{
    session = [[EASession alloc] initWithAccessory:accessory forProtocol:@"com.bluebamboo.p25i"];//initial session that pair with protocol string
    [[session outputStream] setDelegate:self];//set delegate class for output stream 
    [[session outputStream] scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode]; //set outputstream loop
    [[session outputStream] open]; //open session
    [[session inputStream] setDelegate:self];
    [[session inputStream] open];
    [[session inputStream] scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];


}

次に、ストリーム デリゲートが呼び出されます -

//this is a stream listener function that would actived by system while steam has any event
- (void)stream:(NSStream *)theStream handleEvent:(NSStreamEvent)streamEvent
{   



    switch(streamEvent)
    {
        case NSStreamEventOpenCompleted:
            if(theStream==[session outputStream])//to identify which stream has been opend
            {
                [self addLabel:@"outputNSStream open;"];
            }
            else
            {
                [self addLabel:@"inputNSStream open:"];
            }


            break;
        case NSStreamEventHasBytesAvailable:
            //if system has stream data comes in
            [self addLabel:@"receiving Data;"];

            uint8_t buf2[100];//create a buffer
            unsigned int len = 0;
            //read buffer commands return actuall length of return data
            len = [[session inputStream] read:buf2 maxLength:100];

            if (len>0 )
            {
                if (buf2[4]==0x03&&buf2[5]==0x00)//if two bytes are 0x03 and 0x00, that means print success 
                {
                    //display success message
                    alertMessage = [[UIAlertView alloc] initWithTitle:@"SUCCESS:" message:@"P25i have printed Text successfully" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
                    [alertMessage show];
                    [alertMessage release];

                    [self addLabel:@"received success"]; 
                }

            }


            [self enableButton];
            //operation finished then close all streams and session
            [[session outputStream] close];
            [[session outputStream] removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
            [[session outputStream] setDelegate:nil];
            [[session inputStream] close];
            [[session inputStream] removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
            [[session inputStream] setDelegate:nil];
            [session release];
            session = nil;
            //[self connectSession];
            //switcher2=TRUE;

            break;
        case NSStreamEventHasSpaceAvailable:

            [self addLabel:@" NSStreamEventHasSpaceAvailable"];
            if (switcher2)//we send loop mode so application would keep sending data to p25, the switcher2 identify the data has send to P25m
            {


                         //[self addLabel:@"buffer is selected"];
                 int contentLength=[printContent.text length];
                 unsigned char buffer[contentLength+7];
                 buffer[0] = 0X55; 
                         buffer[1]=0x66; 
                         buffer[2]=0x77;  
                         buffer[3]=0x88; 
                         buffer[4]=0x44;//print command
                for (int i=5;i<contentLength+5;i++)//add print content
                {
               buffer[i] =[printContent.text characterAtIndex:i-5];
                  }
               buffer[contentLength+5]=0x0A;
               buffer[contentLength+6]=0x0A;
              [[session outputStream] write:(const uint8_t *)buffer maxLength:contentLength+7];//send print package



                switcher2 =FALSE;
            }



            break;
        case NSStreamEventErrorOccurred:
            alertMessage = [[UIAlertView alloc] initWithTitle:@"ERROR:" message:@"NSSTream Error" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
            [alertMessage show];
            [alertMessage release];

            [self enableButton];
            [self addLabel:@"NSSTream error"];
            break;
        default:

            break;
    }
}