Hello STM32 Community,
I’m currently working with the STEVAL-PROTEUS1 evaluation board, which integrates an STM32WB5MMG microcontroller and an IIS2DLPC MEMS accelerometer. I’m using the board together with the ST BLE Sensor mobile app, and it works great out-of-the-box for streaming sensor data over BLE.
However, I’d like to change the sampling frequency (ODR) of the onboard accelerometer to suit my specific application needs. For example, I want to increase the data rate to 800 Hz, instead of the default (which seems to be 25 Hz or 50 Hz).
What I’ve done So Far:
int32_t IIS2DLPC_Init(IIS2DLPC_Object_t *pObj)
{
/* Enable register address automatically incremented during a multiple byte
access with a serial interface. */
if (iis2dlpc_auto_increment_set(&(pObj->Ctx), PROPERTY_ENABLE) != IIS2DLPC_OK)
{
return IIS2DLPC_ERROR;
}
/* Enable BDU */
if (iis2dlpc_block_data_update_set(&(pObj->Ctx), PROPERTY_ENABLE) != IIS2DLPC_OK)
{
return IIS2DLPC_ERROR;
}
/* FIFO mode selection */
if (iis2dlpc_fifo_mode_set(&(pObj->Ctx), IIS2DLPC_BYPASS_MODE) != IIS2DLPC_OK)
{
return IIS2DLPC_ERROR;
}
/* Power mode selection */
if (iis2dlpc_power_mode_set(&(pObj->Ctx), IIS2DLPC_HIGH_PERFORMANCE) != IIS2DLPC_OK)
{
return IIS2DLPC_ERROR;
}
/* Select default output data rate. */
pObj->acc_odr = 800.0f;
/* Select default operating mode. */
pObj->acc_operating_mode = IIS2DLPC_HIGH_PERFORMANCE_MODE;
/* Select default low noise (disabled). */
pObj->acc_low_noise = IIS2DLPC_LOW_NOISE_DISABLE;
/* Output data rate selection - power down. */
if (iis2dlpc_data_rate_set(&(pObj->Ctx), IIS2DLPC_XL_ODR_800Hz) != IIS2DLPC_OK)
{
return IIS2DLPC_ERROR;
}
/* Full scale selection. */
if (iis2dlpc_full_scale_set(&(pObj->Ctx), IIS2DLPC_2g) != IIS2DLPC_OK)
{
return IIS2DLPC_ERROR;
}
pObj->is_initialized = 1;
return IIS2DLPC_OK;
}
I’m Trying to Achieve:
Any guidance, example code snippets, or references to documentation would be greatly appreciated. I believe others working with STEVAL-PROTEUS1 and similar BLE sensor nodes might benefit from this as well.
Thanks in advance!
