RedPark TTL Cable ReadBytesData - unable to get any data - iphone

Question

I have two UILabels, info and receiving. Receiving is suppose to tell me that I am actually receiving data. However, when it does indicate that.... my info UILabel is not being updated accordingly. It sometimes works and sometimes does not work..
What is up with that?
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
[super viewDidLoad];
receiving = [[UILabel alloc] initWithFrame: CGRectMake(30,50,255,100)];
info = [[UILabel alloc] initWithFrame: CGRectMake(30,200,255,100)];
info.backgroundColor = [UIColor orangeColor];
receiving.backgroundColor = [UIColor orangeColor];
// [self.view addSubview: toggleSwitch];
receiving.text = #"Not Receiving...";
[self.view addSubview: info];
[self.view addSubview: receiving];
}
return self;
}
- (void) startCommThread:(id)object
{
// NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
// initialize RscMgr on this thread
// so it schedules delegate callbacks for this thread
rcsMgr = [[RscMgr alloc] init];
[rcsMgr setDelegate:self];
// run the run loop
[[NSRunLoop currentRunLoop] run];
// [pool release];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Create and start the comm thread. We'll use this thread to manage the rscMgr so
// we don't tie up the UI thread.
if (commThread == nil)
{
commThread = [[NSThread alloc] initWithTarget:self
selector:#selector(startCommThread:)
object:nil];
[commThread start]; // Actually create the thread
}
}
- (void) readBytesAvailable:(UInt32)numBytes {
receiving.text = #"Receiving...";
NSString* str = [rcsMgr getStringFromBytesAvailable];
if ( str ) receiving.text = #"I GOT SOMETHING!";
// if ( numBytes ) receiving.text = numBytes;
else receiving.text = #"Still Receiving...";
info.text = str;
}

Answer 1

Here's my best shot at an answer, with the caveat that I've never used RedPark's cable or SDK. My hunch is that -readBytesAvailable: is called by the RscMgr on the same background thread used to set it up. You can't use UIKit objects on background threads. You need transfer that work back to the main thread/queue something like this:
- (void)readBytesAvailable:(UInt32)numBytes
{
NSString* str = [rcsMgr getStringFromBytesAvailable];
dispatch_async(dispatch_get_main_queue(), ^{
if (str) {
receiving.text = #"I GOT SOMETHING!";
} else {
receiving.text = #"Still Receiving...";
}
info.text = str;
});
}
Also, you should have an autorelease pool on your commThread. Why did you comment it out?