Using timer3 and timer4 on evmdm365

Jinh

I can get timer3 on my dm365 board going and used it as a counter and also now a timer with interrupt service routine to make noise out of my speaker but for no luck can I get timer4 to do the same, it just doesn't respond. I have tried 32-bit unchained mode and then 64-bit mode but no luck and then reverted to timer3 which I was using as a counter in 64-bit mode for some other functionality and set up isr to operate the voice codec from and it worked.

Where can I start looking for getting timer4 going? How do I find out if it is clashing maybe with some other device? Any help would be appreciated - even with documentation that is quite confusing also.....

Thanks, Jinh T.

over 14 years ago

0 AnBer over 14 years ago

TI__Mastermind 30160 points

Jinh said:
Where can I start looking for getting timer4 going? How do I find out if it is clashing maybe with some other device?

a) As for other peripherals you need to make sure that:
- pinmux registers are correctly setup (if the timer pins are used)
    see http://processors.wiki.ti.com/index.php/DM365/DM368_Pinmuxing_Spreadsheet_Utility
- PSC has been program accordingly to enable Timer4
    See section 7 of the DM365 system guide - SPRUFG5A.
    You can look as well at the DM365 GEL file provided in the "DM365 EVM Target Content" at:
    http://support.spectrumdigital.com/boards/evmdm365/revf/

b) Have you checked that the Timer4 registers are properly written?
I have found the following post where it seems that the base address of some timers were wrongly defined (not sure to which DVSDK version/Liux kernel it refer to):
http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/100/p/7894/31820.aspx#31820

c) The Timer4 module (on silicon) is validated but it can be that at the Linux kernel driver the Timer4 has not been tested (or even there was no plan to support it). So you will have to check that all the init fone for Timer3 is as well done for Timer 4 (like the pinmux, PSC, timer registers, ...etc) like mention above.

BR,

Anthony

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Using timer3 and timer4 on evmdm365