pyadi-iio example w/ADIS16485 timing out

Question

Attempting to use the pyadi-iio lib to read out data from the ADIS16485: 
 
 The IMU is bolted to an RPIZ board, which is installed on a RPi 4B 
 Using Kuiper Linux, latest version 
 Using pyadi-iio v0.0.14 
 
 Created my own DT overlay to get the device to show up on /sys/bus/iio: 
 
 Running the simple script: 
 
 Results in a TimeOut exception thrown on the adi.rx() call. 
 
 Based on this ticket, changing up rx_buffer_size and/or sample_rate didn't change the behavior. Can you advise? Thanks - Andrew

nsa · Accepted Answer

Hi, 
 A1B said: From the RPIZ schematic (02_059367b_top.pdf), DIO2 should be on GPIO25. From previous experience with this IMU (bare metal, not Linux), DIO2 is the default DR line for the ADIS16485. 
 Signal chain should be: P2-9 (IMU DIO2) -> P4-22 (RPi GPIO25). 
 Then this might be your problem... As you're not specifying 'interrupt-names', DIO1 is the ping being configured as data ready (see here ) and it seems we have nothing connect to it. 
 Hence you need to add this to your overlay: interrupt-names = "DIO2" so that DIO2 is used as data ready, 
 
 - Nuno S&aacute;

Electronic Design Services - PartnerZone

Products In This Thread

pyadi-iio example w/ADIS16485 timing out

Top Replies