timers and clocks

Luke Anthony

Other Parts Discussed in Thread: SYSBIOS

Hello, I am trying to port some non-RTOS code into SYS/BIOS 6.33.04. I am having trouble using clocks / timers.

In my non-RTOS setup, I am using the functions;

TimerEnable, TimerDisable, TimerLoadSet, TimerConfigure, TimerControlStall and TimerPrescaleSet

Now that my project is moved over to SYS/BIOS, I have been unable to find the equivalent function calls in order to do what I need.

Can someone provide some insight?

thanks

over 12 years ago

0 ToddMullanix over 12 years ago

TI__Guru* 96960 points

Hi Luke,

There are SYS/BIOS Timer calls in ti.sysbios.hal.Timer. For example, there are the following APIs.

Timer_create
Timer_start
Timer_stop
Timer_setPeriod

Todd

0 Luke Anthony over 12 years ago in reply to ToddMullanix

Intellectual 435 points

Thanks.

What would then be the preferred method to accomplish something like LoadSet or PrescaleSet? Is it just a matter of setting the period or timeout value accordingly?

0 Ashish Kapania over 12 years ago in reply to Luke Anthony

TI__Mastermind 21645 points

Hi Luke,

What target are you building your application for ? BIOS has an API similar to PrescaleSet on only some targets like C28x.

You can use Timer_setPeriod() and Timer_setPeriodMicroSecs() to achieve the functionality of TimerLoadSet() on BIOS.

For more information on BIOS timer APIs you can checkout this link:

http://software-dl.ti.com/dsps/dsps_public_sw/sdo_sb/targetcontent/bios/sysbios/6_34_04_22/exports/bios_6_34_04_22/docs/cdoc/index.html

Best,

Ashish

0 Luke Anthony over 12 years ago in reply to Ashish Kapania

Intellectual 435 points

Thanks Ashish,

The platform we're using is M3, specifically, lm3s9b96

luke

0 Ashish Kapania over 12 years ago in reply to Luke Anthony

TI__Mastermind 21645 points

Hi Luke,

On lm3 targets we do not support PrescaleSet, however there is an equivalent for every other Timer API you are currently using. You can get a list of all supported timer APIs for lm3 devices along with their description here:

http://software-dl.ti.com/dsps/dsps_public_sw/sdo_sb/targetcontent/bios/sysbios/6_35_01_29/exports/bios_6_35_01_29/docs/cdoc/index.html#ti/sysbios/family/arm/lm3/Timer.html

Best,

Ashish

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timers and clocks