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Quad timers and Auxilary timers provided by SDK timer driver

Started by Nitin Madhukar Yewale September 27, 2002
Hi ,

I am using 56F827 in my project. I have gone through the
documentation of SDK Programmer's Guide and found that SDK provides API
for Timer Services.
[Section 5.1.15]. It says SDK driver can provide 7 auxilary timers and
TOD.

I am using 3 Quadtimers and I need 3 more timers for my
application.

827 has 4 Quad timers and 1 TOD. Though timer driver is
providing auxilary timers but internally it might be using actual 827
timer resources.

I would like to know the SDK timer dirver implementation. Are
they using actual 827 timer resources?

Is it safe If I use 3 quad timers and 3 auxiliary timers for my
application or they will clash each other?

Thanks and Regards,
Nitin Yewale


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Yes, SDK timer driver (Timer Services) uses actual 827 quad timer driver underneath. However, if you use SDK Timer Services, and enable the actual quad timer for usage in your application as well, SDK will perform preprocessor check and will inform you if you have conflicts (If you enable Timer Services, SDK will check to see which quad timers are not used by the user directly, and will use available resources).

 

Also, you have full source code for the SDK, so you can always step through the code and see what is happening underneath.

 

Sincerely,

 

Leonard N. Elevich

Motorola DSPO

 

 

-----Original Message-----
From: Nitin Madhukar Yewale [mailto:n...@wipro.com]
Sent:
Friday, September 27, 2002 3:22 AM
To: m...@yahoogroups.com
Subject: [motoroladsp] Quad timers and Auxilary timers provided by SDK timer driver

 

Hi ,

      I am using 56F827 in my project. I have gone through the
documentation of SDK Programmer's Guide and found that SDK provides API
for Timer Services.
[Section 5.1.15]. It says SDK driver can provide 7 auxilary timers and
TOD.

      I am using 3 Quadtimers and I need 3 more timers for my
application.

      827 has 4 Quad timers and 1 TOD. Though timer driver is
providing auxilary timers but internally it might be using actual 827
timer resources.

      I would like to know the SDK timer dirver implementation. Are
they using actual 827 timer resources?
     
      Is it safe If I use 3 quad timers and 3 auxiliary timers for my
application or they will clash each other?

Thanks and Regards,
Nitin Yewale


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Have to apologize 4 being total newbie in relation to
writing 3-phase/bdlc code 4 56F803, and
would WelCome if someone kind could give a simple
piece
of source that would read encoder counts and/or axis
rotational angle from HP HEDS5500 encoder hooked
to the encoder/quad port of the dsp56f803 ( have
checked with scope that the encoder quadrature signal
and index pulses come trough fine to the board pins ).

Would need sample code to get motivation kick
started after too long hiatus from coding.

Did not find any suitable encoder reading source
code examples from the SDK, such that one could
surgery
out easily from the SDK bdlc demos.

Just a simplest of polling codes would be more than
enough, if it is possible to read the counter without
ISRs/additional timer routines.

Could anyone please help with short demo source of how
to do it, and promise will not bug again for some
while. No, this is not a school related, just for
personal learning to find motivation to study further
to one day get a working bdlc-code working with
F803 pwming a siliconix level-shifting fet driver/
hall-commutator and reading the encoder from the
motor,a simple pwm out, encoder in situation where
rest is handled with hw. Thks,

Sade M.