Openmoko Bug #2145: Debian: Reading of accelerometers broken

Openmoko Public Trac bugs at docs.openmoko.org
Tue Dec 23 14:12:22 CET 2008


#2145: Debian: Reading of accelerometers broken
-------------------------------------+--------------------------------------
    Reporter:  Defiant               |        Owner:  hardware   
        Type:  defect                |       Status:  closed     
    Priority:  normal                |    Milestone:             
   Component:  hardware              |      Version:  unspecified
    Severity:  normal                |   Resolution:  fixed      
    Keywords:  debian event2 event3  |     Haspatch:  0          
   Blockedby:                        |    Estimated:             
 Patchreview:                        |     Blocking:             
Reproducible:  always                |  
-------------------------------------+--------------------------------------

Comment(by Johannes):

 I just tried Om2008.12-om-gta02.uImage.bin and can now see what the
 original reporter has observed.

 Running the ruby script from Accelerometer_data_retrieval produces
 constant flow of data while the device is laying on the table. When I pick
 it up and start shaking it then the script stops outputting data. Display
 of interrupt count on second console now looks like this.

 {{{
      1  debian-gta02:~# while [ 1 == 1 ] ; do cat /proc/interrupts | grep
 lis302dl ; sleep 10 ; done
      2   16:        124    s3c-ext0  lis302dl
      3   60:       2866     s3c-ext  lis302dl
      4   16:        124    s3c-ext0  lis302dl
      5   60:       3060     s3c-ext  lis302dl
      6   16:        124    s3c-ext0  lis302dl
  >>> 7   60:       3245     s3c-ext  lis302dl
      8   16:        124    s3c-ext0  lis302dl
  >>> 9   60:       3254     s3c-ext  lis302dl
     10   16:        124    s3c-ext0  lis302dl
     11   60:       3259     s3c-ext  lis302dl
     12   16:        124    s3c-ext0  lis302dl
     13   60:       3449     s3c-ext  lis302dl
 }}}

 Shaking took place between line 7 and line 9 above, there are only very
 few interrupts counted although the file is permanently open.

 I must say that I'm confused now. Is this by design and expected
 behaviour?

-- 
Ticket URL: <https://docs.openmoko.org/trac/ticket/2145#comment:22>
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