Detecting ANT+ usb stick

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08 November 2013 09:51 AM

MaximumTrainer Sr. Member

Total Posts: 123

Joined 2013-10-07

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Hi,

I would like my application to detect the first ANT+ usb stick from the computer.
Basically just a button press that would :
-scan all usb port (0..12) try with baud 57000 first, then 500000 stop when one usb key has been sucessfully init
I have tried the code below, but pclSerialObject->Init seems to always return true
Is there a convenience function that I'm missing? Is what I'm asking possible ? I would like to not modify ANT_LIB for future update so my code stay compatible.
Thank you!

for (int deviceNumber=0; deviceNumber<12; deviceNumber++) {

        printf("Looking usb device on port : %d...", deviceNumber);

//        UCHAR nbDevice = pclSerialObject->GetNumberOfDevices();

        bStatus = pclSerialObject->Init(USER_BAUDRATE_USB2, deviceNumber);
        if (bStatus)  //always return true even with wrong deviceNumber..
            break;
    } 

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11 November 2013 12:40 PM #1

Harrison Administrator

Total Posts: 745

Joined 2012-09-14

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Assuming your "pclSerialObject" is still referencing an instance of the "DSISerialGeneric" class, that class does contain a convenience function called "AutoInit". It will automatically connect to any available ANT USB stick, although at the moment it only returns device number 0 for any devices it connects to.

There is also the ANT_Device() constructor in the ANT_Managed_Library which implements an automated USB device initialization scheme as another reference.

11 November 2013 01:05 PM #2

MaximumTrainer Sr. Member

Total Posts: 123

Joined 2013-10-07

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I need to learn to read source code!
AutoInit is all I need, thank you Mr. Harrison

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22 November 2014 09:16 AM #3

MaximumTrainer Sr. Member

Total Posts: 123

Joined 2013-10-07

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Using AutoInit() work fine when the ANT+ Stick is not in use by other program.

Is it possible to detect if there is an ANT+ Stick connected, but already used by another program
Could modifiy the AutoInit() method in dsi_serial_generic.cpp if so
Thank you!

///////////////////////////////////////////////////////////////////////
// Initializes and opens the object.
///////////////////////////////////////////////////////////////////////
//defines used by AutoInit
#define ANT_USB_STICK_PID     0x1004
#define ANT_USB_DEV_BOARD_PID 0x1006
#define ANT_USB_STICK_BAUD    ((USHORT)50000)
#define ANT_DEFAULT_BAUD      ((USHORT)57600)

BOOL DSISerialGeneric::AutoInit()
{
   Close();
   if (pclDevice)
      delete pclDevice;
   pclDevice = NULL;
   ucDeviceNumber = 0xFF;   

   const ANTDeviceList clDeviceList = USBDeviceHandle::GetAvailableDevices();  //saves a copy of the list and all of the elements
   
   if(clDeviceList.GetSize() == 0)
   {
      //When this is being polled repeatedly, as in the ANTFS host class, the USBReset calls to WinDevice Enable/Disable take a large amount if CPU, so we limit the
      //reset here to only be called a maximum of once every 30s
      time_t curTime = time(NULL);
      if(curTime - lastUsbResetTime > 30)
      {
         lastUsbResetTime = curTime;
         this->USBReset();
      }
      return FALSE;
   }   

//--- Custom code Added by blaisminator
   if(clDeviceList.GetSize() > 0) {
  /// Detect if we have busy ANT ke
}

   
   USBDeviceHandle::CopyANTDevice(pclDevice, clDeviceList[0]); 
   ucDeviceNumber = 0;            //initialize it to 0 for now (all devices that use autoinit will have a 0 device number) //TODO this devicenumber is useless because it can't be used to access the list again
   switch (pclDevice->GetPid())
   {
      case ANT_USB_STICK_PID:      
         ulBaud = ANT_USB_STICK_BAUD;
         break;
      case ANT_USB_DEV_BOARD_PID:
      default:
         ulBaud = ANT_DEFAULT_BAUD;
         break;
   }

   return TRUE;
} 

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