LAUNCHXL-F28379D: How to get a timestamp

Sumit B

Prodigy 230 points

Part Number: LAUNCHXL-F28379D
Other Parts Discussed in Thread: C2000WARE

Hello there,

Is there any API to get the timestamp in launchxl-f28379d?

thanks,

over 2 years ago

0 Omer Amir over 2 years ago

TI__Mastermind 30185 points

Hello Sumit,

What sort of timestamp are you asking about? Are you looking for a timestamp for something like a CPU timer or from something like a capture module which is measuring an input square wave?

0 Sumit B over 2 years ago in reply to Omer Amir

Prodigy 230 points

Omer,

CPU timer, trying to get a timer in microseconds just before some event happens.

Thanks,

0 Omer Amir over 2 years ago in reply to Sumit B

TI__Mastermind 30185 points

Hello Sumit,

There is a timer provided within the device, you can find more details in section 3.8 32-Bit CPU Timers 0/1/2. The section provides details on the registers used to start/stop the counter, configure the period, and read the timestamp. The CPU timer counts clock cycle ticks, so to convert it to microseconds you will need to do the conversion based on your configured clock frequency (the default should be 200MHz).

0 Sumit B over 2 years ago in reply to Omer Amir

Prodigy 230 points

Omer,

I am accessing the TIM of CpuTimer0Regs (CpuTimer0Regs.TIM.all) and its giving me some values, are those systicks? what does actually store at CpuTimer0Regs.TIM.all?

Thanks,

0 Hareesh Janakiraman over 2 years ago in reply to Sumit B

TI__Guru* 95315 points

The input clock to the CPU Timers is SYSCLKOUT (the same frequency at which the CPU is operating). However, there is a prescaler which will impact the resolution. As Omer advised, please go through 3.8 32-Bit CPU Timers 0/1/2 in the device TRM. It is hard to explain the timer operation in a e2e post.

0 Sumit B over 2 years ago in reply to Hareesh Janakiraman

Prodigy 230 points

Hello Hareesh,

I have this stm32 code for timestamp, what I am trying to do the same thing but for f28379d

is there any API I can use that outputs the same result?

Thank you,

0 Hareesh Janakiraman over 2 years ago in reply to Sumit B

TI__Guru* 95315 points

If you have not done so already, please download the latest version of C2000ware and look at cputimer.h in C:\ti\c2000\C2000Ware_5_02_00_00\driverlib\f2837xd\driverlib. All the APIs for CPU-Timer are in that file. The one you are looking for is

We don't have anything beyond that.

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LAUNCHXL-F28379D: How to get a timestamp