files - Programación USB en iPhone

notes app ios

Question

todo lo que quiero hacer es enviar / recibir datos a través del puerto USB. Con el SDK oficial no es posible, aparte de MFi.

¿Qué otros métodos de comunicación conectados con otros dispositivos son posibles y propondría?

¡Muchas gracias de antemano!

GD

Answer 1

Echa un vistazo a http://redpark.com

venden un cable USB y un SDK de iOS para leer / escribir datos en un dispositivo conectado a través de USB.

Lo he utilizado con éxito para conectar el iPad a varios hardware.

Answer 2

La membresía de IMF no es necesaria para los desarrolladores de software, solo es necesaria para los desarrolladores de hardware. También a qué puerto USB te estás refiriendo? ¿Te estás refiriendo al conector de 32 pin del iPhone? Siempre puede enviar datos al dispositivo de hardware mediante bluetooth.

actualización 1 -

En primer lugar Lo siento, el código puede parecer complejo. Estoy pegando esto de mi proyecto actual. Publicar comentario si quieres un proyecto de muestra.

Primero debe registrarse para recibir las notificaciones en vista.

[[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];

Entonces deberías encontrar los accesorios adjuntos.

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

Entonces compruebe que este es el accesorio correcto que está buscando -

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;
}
}

Luego abre una sesión -

//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];
}

Entonces el delegado de la corriente será llamado -

//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;
}
}