Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/ARM/CMSDK_CM3/FPGAIO/BUTTON#0x0
BUTTON0=Off, BUTTON1=Off
Button Connections
0 (Off): BUTTON is off
1 (On): BUTTON is on
https://github.com/cmsis-svd/cmsis-svd-data