BMP390 DRDY state not present on External Int Pin

I need to configure the BMP390 to generate an interrupt when the DRDY condition is met.

I have tired various configuration of settings.int_settings and cannot ever see the interrupt pin changing state on an oscilloscope.  It does change state when I manually toggle the pin between  Vdd and Gnd.

I have attached my code for reference.  Which appears to run and I see valid Pressure and Temperature reading echo on my serial output.

Please can someone help with this issue?.

 

 

BMP390setup.c
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