implement pedometer on ISM330IS

[apache]

Hi all,

we have a customer hardware with ISM330IS sensor on .

We want to implement a pedometer on it like in the ISM330DHCX. Is it possible ?

I followed the repo ism330is-pid/ism330is_reg.c at 413acfb51fd6f81a7449980a1caf286e37c909fe · STMicroelectronics/ism330is-pid (github.com) but it seems to not include it !

Instead I see it for ISM330DHCX (STMicroelectronics/ism330dhcx-pid: ism303dhcx platform independent driver based on Standard C language and compliant with MISRA standard (github.com)) 

 

Can I use that code too ?

 

[Federica Bossi]

Hi @apache ,

Unlike ISM330DHCX, the ISM330IS doesn't implement in the hardware the embedded function of  pedometer (step detector and step counter).

If you want to implement a pedometer you need to do it in the core.

 

[apache]

Hi,

thanks a lot.

What you mean in the core ? I think the HW is more or less like ISM330DHCX and even more powerful.

How to implemement in the core ? have you same example ?

Thks

 

[apache]

Hi ,

I saw this link here which seems to implement ISM330IS pedometer in the core (ispu-examples/ism330is_lsm6dso16is at master · STMicroelectronics/ispu-examples (github.com)) .

I have a custom MCU in my board, so do I have to downlad the pedometer.h file on the chip via I2C ?

I see the static const ucf_line_ext_t ispu_conf[] structure containg all the operation to do, Do I have to do so ? 

Of course Im going to  buy the dev kit but  I dont use ST MCU to drive the MEMS. 4

Anyway I need to validate the "production process" before I can go for production.

Can you help?

Thanks.

 

 

[Federica Bossi]

Hi @apache ,

 

Yes, you are on the right direction.

You can follow the official driver example here where the loading of the configuration is also done:

 /* Load ISPU configuration */
 for ( i = 0; i < (sizeof(ispu_conf) / sizeof(ucf_line_ext_t) ); i++ ) {
 switch(ispu_conf[i].op) {
 case MEMS_UCF_OP_DELAY:
 platform_delay(ispu_conf[i].data);
 break;
 case MEMS_UCF_OP_WRITE:
 lsm6dso16is_write_reg(&dev_ctx, ispu_conf[i].address, (uint8_t *)&ispu_conf[i].data, 1);
 break;
 }
 }

No problem using MCUs not from ST.