tmedicci commented on issue #12897:
URL: https://github.com/apache/nuttx/issues/12897#issuecomment-2284812409

   > nxdiag
   
   Yes, it's a loopback. You will not be able to measure anything, the pins are 
connected internally and the result was as expected: same content sent is 
successfully read.
   
   
   
   > Hello @tmedicci ,
   > 
   > **Which defconfig did you use?** ./tools/configure.sh esp32c6-devkitm:spi
   > 
   > **Which pins did you connect externally?** 
![image](https://private-user-images.githubusercontent.com/14298854/357151236-bc41dd2f-55a2-432d-b6c3-4b3d3c5a399a.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.PS8VIOqqbMDHgDEzGAir2-Rs_Grd8822r0Dh5xEyCn0)
 
![image](https://private-user-images.githubusercontent.com/14298854/357151556-fbf50016-e1be-4bae-8adc-b8975bc49b8a.png?jw
 
t=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.T3PQhL3RtVmdcEcBblqy7EGwAuaFKY5TtOjPQmmz1Go)
   > 
   > Brown - CS PIN 19 Red - FSPIQ 2 Yellow - CLK 6 Orange - FSPID 7
   
   I didn't get: in this test aren't you connecting MOSI with MISO? (pins 2 and 
7 connected together) to test the loopback? If not, what is the slave device?


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