Well, I'm trying to communicate with the chip thru the I2C switch(TCA9548a) on 
the PS side. From the schematic for the N310, I'm missing how the FPGA could be 
involved here since I'm trying to accomplish this on the PS side. Maybe I'm 
missing something here. 
    On Tuesday, October 12, 2021, 02:56:38 PM EDT, Marcus D. Leech 
<patchvonbr...@gmail.com> wrote:  
 
  On 2021-10-12 2:45 p.m., Tellrell White wrote:
  
 
 5918 root            2208 S         grep usrp
  
      On Tuesday, October 12, 2021, 02:38:36 PM EDT, Marcus D. Leech 
<patchvonbr...@gmail.com> wrote:  
  
      On 2021-10-12 2:20 p.m., Tellrell White wrote:
  
 
      Out of curiosity, when running "systemctl status usrp-hwd" I get a 
message stating "vendor preset=enabled". Is there anyway possible that mpm is 
still being started at bootup? 
  
            On 
    What does
 
 ps |grep usrp
 
 Yield? 
 
 
       OK, so it isn't usrp-hwd that is "holding" it.
 
 That chip on the DB controls signals like "PWRGOOD", it's possible that the 
FPGA itself is logically "holding" that interface, but that's just
   total speculation on my part.   If the "lsof" utility were installed, it 
would be easy to see if some app-layer process had it open.  But this
   system image doesn't include "lsof".
 
 
   
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