<![CDATA[OpenIMU330BI SPI doesn't work]]>Hi again,

now I tried a lot to and it still doesn't work. I'm running the preinstalled OpenIMU "IMU" application (and also tried it with installing the online available bin).

I removed the Jumpers from P1 to enable SPI mode but the IMU simply doesn't answer.
Also I tried different registers (hw version, software version, etc.) and SPI frequencies (from 100kHz to 1MHz) but there's no reply anyway.

Example Transmission

When i fit the jumpers the online-webserver connection works fine.

Do you have any idea what could be wrong here?

Best Regards
Thomas

]]>https://forum.aceinna.com//topic/291/openimu330bi-spi-doesn-t-workRSS for NodeMon, 13 Apr 2026 08:21:01 GMTSat, 17 Jul 2021 10:50:48 GMT60<![CDATA[Reply to OpenIMU330BI SPI doesn't work on Sat, 17 Jul 2021 10:50:48 GMT]]>Hi again,

now I tried a lot to and it still doesn't work. I'm running the preinstalled OpenIMU "IMU" application (and also tried it with installing the online available bin).

I removed the Jumpers from P1 to enable SPI mode but the IMU simply doesn't answer.
Also I tried different registers (hw version, software version, etc.) and SPI frequencies (from 100kHz to 1MHz) but there's no reply anyway.

Example Transmission

When i fit the jumpers the online-webserver connection works fine.

Do you have any idea what could be wrong here?

Best Regards
Thomas

]]>https://forum.aceinna.com//post/1221https://forum.aceinna.com//post/1221Sat, 17 Jul 2021 10:50:48 GMT<![CDATA[Reply to OpenIMU330BI SPI doesn't work on Mon, 19 Jul 2021 05:20:35 GMT]]>if possible, could you share with me your SPI drive codes?
pls try the sequence in below when start SPI mode communication(confirm 1&2 pins in P1 area are not connected):

  • start the SPI read program in your Master MCU.
  • Power on 330BI

other actions:

  1. update FW to FW2.1 in https://developers.aceinna.com/code/apps
  2. try other register, such as:
    0x37
    2beed4d9-4fe3-49bc-a6dd-52d10510ad68-image.png
    or try burst read 0x3E
    4f137c87-ca1a-4cec-9573-12c75872323e-image.png
]]>https://forum.aceinna.com//post/1232https://forum.aceinna.com//post/1232Mon, 19 Jul 2021 05:20:35 GMT<![CDATA[Reply to OpenIMU330BI SPI doesn't work on Mon, 19 Jul 2021 08:29:38 GMT]]>Hi, i already updated to FW2.1, changed SPI communication to 16bit and powering on the IMU after the SPI readout, but i still get no response at all. (at P1 all jumpers are disconnected)

AceinnaOpenIMU.png

]]>https://forum.aceinna.com//post/1238https://forum.aceinna.com//post/1238Mon, 19 Jul 2021 08:29:38 GMT<![CDATA[Reply to OpenIMU330BI SPI doesn't work on Mon, 19 Jul 2021 11:22:09 GMT]]>confirm your pin connection of MISO, whether some connection problems it is.
such as: disconnect, or short connect to GND or other pins.
could you show some pics of your HW connections?

]]>https://forum.aceinna.com//post/1243https://forum.aceinna.com//post/1243Mon, 19 Jul 2021 11:22:09 GMT<![CDATA[Reply to OpenIMU330BI SPI doesn't work on Mon, 19 Jul 2021 14:04:00 GMT]]>Thanks for your input but hardware was fine.
I now could fix the problem by rewriting the SPI+DMA framework: There was some bug where the RX handler wouldn't get called correctly.

]]>https://forum.aceinna.com//post/1244https://forum.aceinna.com//post/1244Mon, 19 Jul 2021 14:04:00 GMT