How to timestretch or timeshrink a waveform in drv2605 ?

Vinu Gopalakrishnan

Hi all,

I want to change the duration of the library effects. I tried writing time offset values into SPT and SNT registers. But not working. In the datasheet its mentioned refer "PLAYBACK_SECTION", but i cant find this section. please help.

regards Vinu

over 10 years ago

0 Gautham over 10 years ago

TI__Genius 12485 points

Hi Vinu,

Could you post an oscilloscope capture of before and after offset? Could you also adjust the ODT register and see if that has any effect?

Also please make sure the sign you are adding.

For instance:

Adding 100ms would be : Register: 0x0D ; Write: 0x14

Removing 100ms would be: Register: 0x0D ; Write: 0xEC

Regards,

Gautham Ramachandran

Applications Engineer- Haptics.

0 Vinu Gopalakrishnan over 10 years ago in reply to Gautham

Intellectual 635 points

Hi Gautham,
I tried writing 0x14 to 0x0D but couldn't notice any change. Should i change the mode of LRA to open loop?
Thanks in advance.
Vinu

0 Peter Li79 over 10 years ago in reply to Vinu Gopalakrishnan

TI__Expert 8940 points

Hi, Vinu:

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How to timestretch or timeshrink a waveform in drv2605 ?