Integrate IIS2MDC to STM32F103c

[SBans]

Hi,

I am trying to read data from the IIS2MDC placed on a STEVAL-MKI185V1 on a STM32F103C board programmed via Arduino IDE.

I tried following the steps mentioned in the document in the link:

https://community.st.com/s/question/0D50X00009yDgrUSAS/is-there-any-description-initialisation-sequence-to-get-the-master-i2c-of-the-ism330dlc-running-mode2

However when I read the WHOIAM register it gave a value of 0 instead of 0x40. Subsequently I am unable to read the magnetometer register values.

PFA the code that I am working on.

Any help for this is much appreciated.

Thank You

[Eleon BORLINI]

Hi, the fact you are reading 00h on the WHO_AM_I make me suspect the issue is on the communication. Could you check the integrity of the I2C transmission and share the oscilloscope or pattern analyzer screen? Which frequency / Vdd or VddIO / pull-up value are you working at? To check the issue is related to the communication and not to the sensor, you could try interface to it to through the SPI. I think you already did it, but please note that the 8bit I2C slave address is 3D or 3C and not 1E.

Regards

[SBans]

Hi Eleon,

Thank you for your response. But I have got it working now. Turns out I had missed out on the pull up resistors. Once I added them it worked like a charm.

Thank You