如何通过xcode编程使MAC机器和HID的USB单片机设备进行通讯

#import <Foundation/Foundation.h>
#include <IOKit/hid/IOHIDLib.h>
#include <IOKit/hid/IOHIDKeys.h>

@protocol UsbHIDDelegate <NSObject>
@optional
- (void)usbhidDidRecvData:(uint8_t*)recvData length:(CFIndex)reportLength;
- (void)usbhidDidMatch;
- (void)usbhidDidRemove;
@end

@interface UsbHID : NSObject {
IOHIDManagerRef managerRef;
IOHIDDeviceRef deviceRef;
}

@property(nonatomic,strong)id<UsbHIDDelegate> delegate;

+ (UsbHID *)sharedManager;
- (void)connectHID;
- (void)senddata:(char*)outbuffer;
- (IOHIDManagerRef)getManageRef;
- (void)setManageRef:(IOHIDManagerRef)ref;
- (IOHIDDeviceRef)getDeviceRef;
- (void)setDeviceRef:(IOHIDDeviceRef)ref;

@end

#import "UsbHID.h"

@implementation UsbHID

static UsbHID *_sharedManager = nil;

@synthesize delegate;

static void MyInputCallback(void* context, IOReturn result, void* sender, IOHIDReportType type, uint32_t reportID, uint8_t *report,CFIndex reportLength) {
[[[UsbHID sharedManager] delegate] usbhidDidRecvData:report length:reportLength];
}

static void Handle_DeviceMatchingCallback(void *inContext,IOReturn inResult,void *inSender,IOHIDDeviceRef inIOHIDDeviceRef) {
[[UsbHID sharedManager] setDeviceRef:inIOHIDDeviceRef];
char *inputbuffer = malloc(64);
IOHIDDeviceRegisterInputReportCallback([[UsbHID sharedManager]getDeviceRef], (uint8_t*)inputbuffer, 64, MyInputCallback, NULL);
NSLog(@"%p设备插入,现在usb设备数量:%ld",(void *)inIOHIDDeviceRef,USBDeviceCount(inSender));
[[[UsbHID sharedManager] delegate] usbhidDidMatch];
}

static void Handle_DeviceRemovalCallback(void *inContext,IOReturn inResult,void *inSender,IOHIDDeviceRef inIOHIDDeviceRef) {
[[UsbHID sharedManager] setDeviceRef:nil];
NSLog(@"%p设备拔出,现在usb设备数量:%ld",(void *)inIOHIDDeviceRef,USBDeviceCount(inSender));
[[[UsbHID sharedManager] delegate] usbhidDidRemove];
}

static long USBDeviceCount(IOHIDManagerRef HIDManager){
CFSetRef devSet = IOHIDManagerCopyDevices(HIDManager);
if(devSet)
return CFSetGetCount(devSet);
return 0;
}

+(UsbHID *)sharedManager {
@synchronized( [UsbHID class] ){
if(!_sharedManager)
_sharedManager = [[self alloc] init];
return _sharedManager;
}
return nil;
}

+(id)alloc {
@synchronized ([UsbHID class]){
NSAssert(_sharedManager == nil,
@"Attempted to allocated a second instance");
_sharedManager = [super alloc];
return _sharedManager;
}
return nil;
}

- (id)init {
self = [super init];
if (self) {
managerRef = IOHIDManagerCreate(kCFAllocatorDefault, kIOHIDOptionsTypeNone);
IOHIDManagerScheduleWithRunLoop(managerRef, CFRunLoopGetMain(), kCFRunLoopDefaultMode);
IOReturn ret = IOHIDManagerOpen(managerRef, 0L);
if (ret != kIOReturnSuccess) {
NSAlert* alert = [NSAlert alertWithMessageText:@"error" defaultButton:@"OK" alternateButton:nil otherButton:nil informativeTextWithFormat:@"打开设备失败!"];
[alert runModal];
return self;
}
const long vendorID = 0x1391;
const long productID = 0x2111;
NSMutableDictionary* dict= [NSMutableDictionary dictionary];
[dict setValue:[NSNumber numberWithLong:productID] forKey:[NSString stringWithCString:kIOHIDProductIDKey encoding:NSUTF8StringEncoding]];
[dict setValue:[NSNumber numberWithLong:vendorID] forKey:[NSString stringWithCString:kIOHIDVendorIDKey encoding:NSUTF8StringEncoding]];
IOHIDManagerSetDeviceMatching(managerRef, (__bridge CFMutableDictionaryRef)dict);

IOHIDManagerRegisterDeviceMatchingCallback(managerRef, &Handle_DeviceMatchingCallback, NULL);
IOHIDManagerRegisterDeviceRemovalCallback(managerRef, &Handle_DeviceRemovalCallback, NULL);

NSSet* allDevices = (__bridge NSSet*)(IOHIDManagerCopyDevices(managerRef));
NSArray* deviceRefs = [allDevices allObjects];
if (deviceRefs.count==0) {

}
}
return self;
}

- (void)dealloc {
IOReturn ret = IOHIDDeviceClose(deviceRef, 0L);
if (ret == kIOReturnSuccess) {
deviceRef = nil;
}
ret = IOHIDManagerClose(managerRef, 0L);
if (ret == kIOReturnSuccess) {
managerRef = nil;
}
}

- (void)connectHID {
NSSet* allDevices = (__bridge NSSet*)(IOHIDManagerCopyDevices(managerRef));
NSArray* deviceRefs = [allDevices allObjects];
deviceRef = (deviceRefs.count)?(__bridge IOHIDDeviceRef)[deviceRefs objectAtIndex:0]:nil;
}

- (void)senddata:(char*)outbuffer {
if (!deviceRef) {
return ;
}
IOReturn ret = IOHIDDeviceSetReport(deviceRef, kIOHIDReportTypeOutput, 0, (uint8_t*)outbuffer, sizeof(outbuffer));
if (ret != kIOReturnSuccess) {
NSAlert* alert = [NSAlert alertWithMessageText:@"error" defaultButton:@"OK" alternateButton:nil otherButton:nil informativeTextWithFormat:@"发送数据失败!"];
[alert runModal];
}
}

- (IOHIDManagerRef)getManageRef {
return managerRef;
}

- (void)setManageRef:(IOHIDManagerRef)ref {
managerRef = ref;
}

- (IOHIDDeviceRef)getDeviceRef {
return deviceRef;
}

- (void)setDeviceRef:(IOHIDDeviceRef)ref {
deviceRef = ref;
}

@end