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Visitor II
May 13, 2025
Question

ISM330 SPI not working

  • May 13, 2025
  • 1 reply
  • 320 views

Hi,

I'm trying to get the SPI interface with the ISM330DHCX to work but it seems that the SDO pin can't reach logic high levels.

Screenshot 2025-05-12 at 5.48.25 PM.png

The above has SCL in blue and SDO in red.

Screenshot 2025-05-12 at 5.46.19 PM.png

CS in blue and SDO in red.

Screenshot 2025-05-12 at 6.19.20 PM.png

SCL in blue and SDI in red.
IMG_3231.jpg

Above is my hardware setup, vdd and vddio is hooked up to 3.3V on the Nucleo.
I've been able to get this to work with I2C but haven't with SPI. Any help or advice would be appreciated


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    1 reply

    Super User
    May 14, 2025

    Connect MISO to MISO, verify SPI is working correctly.

    Verify connections between nucleo and breakout board. List them here. A bit hard to trace where the wires are going.

    Should be:

    CS -> CS

    SCK -> SCK

    MOSI -> SDI

    MISO -> SDO

    Verify board power.