AW: [Tinyos-help] Getting SerialID from tmoteinvent

[Ole Bischoff]

Hy David,
I had the same problem with my TmoteSky. After debugging with JTAG I noticed
that the problem in DS2411.init() is the reset() function.

command result_t DS2411.init() // >= 6000us
  {
    int retry = 5;
    uint8_t id[8];

    bzero( m_id, 8 );
    call DS2411Pin.init();
    while( retry-- > 0 )
    {
      int crc = 0;
      if( reset() )
      {
	uint8_t* byte;

	write_byte(0x33); //read rom
	for( byte=id+7; byte!=id-1; byte-- )
	  crc = crc8_byte( crc, *byte=read_byte() );

	if( crc == 0 )
	{
	  memcpy( m_id, id, 8 );
	  return SUCCESS;
	}
     }
    }


So I did a quick and dirty work-around:

command result_t DS2411.init() // >= 6000us
  {
    int retry = 5;
    uint8_t id[8];

    bzero( m_id, 8 );
    call DS2411Pin.init();
    while( retry-- > 0 )
    {
      int crc = 0;
      //if( reset() )
      reset();
      if(1)
      {
	uint8_t* byte;

	write_byte(0x33); //read rom
	for( byte=id+7; byte!=id-1; byte-- )
	  crc = crc8_byte( crc, *byte=read_byte() );

	if( crc == 0 )
	{
	  memcpy( m_id, id, 8 );
	  return SUCCESS;
	}
     }
    }

I know this is really poor, but now it works for me. BTW I just needed the
component to clearly identify my motes via the serial ID, so I did no
further debugging.

Regards,
OLE


-----Ursprüngliche Nachricht-----
Von: tinyos-help-bounces at Millennium.Berkeley.EDU
[mailto:tinyos-help-bounces at Millennium.Berkeley.EDU] Im Auftrag von Joe
Polastre
Gesendet: Mittwoch, 18. Juli 2007 16:37
An: David Henry
Cc: Tinyos-help at Millennium.Berkeley.EDU
Betreff: Re: [Tinyos-help] Getting SerialID from tmoteinvent

No, the DS2411 is identical on Tmote Invent.  The problem is probably
due to the timing in your contrib/ application.  The DS2411 driver
provided with Boomerang has the correct 1-wire timing.

-Joe

On 7/18/07, David Henry <david_henry_il at hotmail.com> wrote:
>
>
> In the absence of nodeid's in the tmote world, I need to get something
else
> so I tried getting Serial ID instead.
> The SerialIDSend application in the contrib tree seemed a good place to
> start.
> Trouble is that the DS2411.init() function hangs for ever.
> Could it be that the 1 wire pin is connected somewhere else on the
> tmoteinvent?
>
> _______________________________________________
> Tinyos-help mailing list
> Tinyos-help at Millennium.Berkeley.EDU
> https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
>
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