我正在使用USB GlobalSat(USG-MR350) GPS設備。我想從我的Mac可可應用程序中的設備獲取位置數據(經度和緯度)。嘗試運行AMSerialPort示例代碼。它正在檢測USB設備,但它給出的輸出格式爲,不可讀格式。數據轉換爲可讀format.This是源代碼的一部分:如何通過可可應用程序從USB GPS設備讀取NMEA數據
- (void)serialPortReadData:(NSDictionary *)dataDictionary
{
// this method is called if data arrives
// @"data" is the actual data, @"serialPort" is the sending port
AMSerialPort *sendPort = [dataDictionary objectForKey:@"serialPort"];
NSData *data = [dataDictionary objectForKey:@"data"];
if ([data length] > 0) {
NSString *text = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
[outputTextView insertText:text];
[text release];
// continue listening
[sendPort readDataInBackground];
} else { // port closed
[outputTextView insertText:@"port closed\r"];
}
[outputTextView setNeedsDisplay:YES];
[outputTextView displayIfNeeded];
}
在我真正瞭解Cocoa所做的事情之前,我開始爲這個Looong開發了一個框架,但它可能有些用處:https://github.com/nall/GarminFramework – nall 2012-02-28 05:49:58