Sir i'm trying to communicate LPS25HB sensor with STM32F072RB board please could you try to help me to resolve this issue? I'm giving you brief Details in Details box?

[VDutt.1]

Sir i'm trying to communicate LPS25HB sensor with STM32F072RB board but the sensor is not acknowledging and to make sure i have connected RTC DS3231 it is working properly. I have checked clock speed with 100khz and 400khz also, pull-up i have connected , GPIO also i have tested, Voltages is also i have tested Lps25hb sensor is needed more than 2.10 v(tested) ?

[Eleon BORLINI]

Hi @VDutt.1​ 

but are you receiving a NACK (in the I2C case) or you are able to read -for example- the WHO_AM_I (0Fh) register?

In the first case, can you send the SDA/SCL scope pictures, or did you tried also with the SPI interface?

In the second case, did you correctly configured the sensor? I suggest you to check the C drivers on Github for a reference --> lps25hb_read_data_polling.c.

-Eleon

[Tesla DeLorean]

Make sure you have the address correct and the device is in the right mode.

The address is the high order 7-bits, the STM32 expects this to be left aligned, check it is shifted and communicated properly so it NACK​s.