Enable/Check TCXO clock.

enjoy-digital / xtrx_julia

XTRX LiteX/LitePCIe based design for Julia Computing

BSD 2-Clause "Simplified" License

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Enable/Check TCXO clock. #3

Closed enjoy-digital closed 2 years ago

enjoy-digital commented 2 years ago

Initial support has been added to enable/check the TCXO input clock (going to the FPGA and LMS7002) but the clock does not seem to be generated. The issue is probably related to https://github.com/enjoy-digital/xtrx_julia/issues/1 that first needs to be implemented.

enjoy-digital commented 2 years ago

Clock is now generated correctly with PMICs configured correctly:

python3 test_tcxo.py 
Monitor TCXO cycles...
   0ms : 95525386
 100ms : 98293492
 200ms : 101061166
 300ms : 105008886
 400ms : 107772799
 500ms : 110541267
 600ms : 115308057
 700ms : 118066391
 800ms : 120823657
 900ms : 124666242

Frequency also seems correct but will be verified with additional tests.

enjoy-digital commented 2 years ago

Also seems correct on LiteScope capture:

enjoy-digital commented 2 years ago

Clock is now correctly configured and seen at 26MHz.