variants: XIAO NRF52: Enable user button

The Xiao nRF52840 combined with the Wio-SX1262 is often used for
cheap and compact DIY companion nodes. The Wio actually has an onboard
pushbutton that can be used as user button. Enable support for the
button.

Signed-off-by: Frieder Schrempf <frieder@fris.de>

variants/xiao_nrf52/platformio.ini

@@ -26,10 +26,13 @@ build_flags = ${nrf52_base.build_flags}
   -D SX126X_RX_BOOSTED_GAIN=1
   -D PIN_WIRE_SCL=D6
   -D PIN_WIRE_SDA=D7
+  -D PIN_USER_BTN=PIN_BUTTON1
+  -D DISPLAY_CLASS=NullDisplayDriver
 build_src_filter = ${nrf52_base.build_src_filter}
   +<helpers/*.cpp>
   +<helpers/sensors>
   +<../variants/xiao_nrf52>
+  +<helpers/ui/NullDisplayDriver.cpp>
 debug_tool = jlink
 upload_protocol = nrfutil
 lib_deps = ${nrf52_base.lib_deps}
@@ -41,6 +44,7 @@ board_build.ldscript = boards/nrf52840_s140_v7_extrafs.ld
 board_upload.maximum_size = 708608
 build_flags =
   ${Xiao_nrf52.build_flags}
+  -I examples/companion_radio/ui-orig
   -D MAX_CONTACTS=350
   -D MAX_GROUP_CHANNELS=40
   -D BLE_PIN_CODE=123456
@@ -52,6 +56,7 @@ build_flags =
 build_src_filter = ${Xiao_nrf52.build_src_filter}
   +<helpers/nrf52/SerialBLEInterface.cpp>
   +<../examples/companion_radio/*.cpp>
+  +<../examples/companion_radio/ui-orig/*.cpp>
 lib_deps =
   ${Xiao_nrf52.lib_deps}
   densaugeo/base64 @ ~1.4.0
@@ -62,6 +67,7 @@ board_build.ldscript = boards/nrf52840_s140_v7_extrafs.ld
 board_upload.maximum_size = 708608
 build_flags =
   ${Xiao_nrf52.build_flags}
+  -I examples/companion_radio/ui-orig
   -D MAX_CONTACTS=350
   -D MAX_GROUP_CHANNELS=40
   -D QSPIFLASH=1
@@ -70,6 +76,7 @@ build_flags =
 build_src_filter = ${Xiao_nrf52.build_src_filter}
   +<helpers/nrf52/SerialBLEInterface.cpp>
   +<../examples/companion_radio/*.cpp>
+  +<../examples/companion_radio/ui-orig/*.cpp>
 lib_deps =
   ${Xiao_nrf52.lib_deps}
   densaugeo/base64 @ ~1.4.0