xiao-nrf52 : initial support for meshcore

initial config for xiao_nrf52

repeater role for xiao-nrf52

xiao-nrf52 correction on bat voltage

xiao-nrf52 this file should not be here ...

variants/xiao_nrf52/target.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#define RADIOLIB_STATIC_ONLY 1
+#include <RadioLib.h>
+#include <helpers/RadioLibWrappers.h>
+#include <helpers/nrf52/XiaoNrf52Board.h>
+#include <helpers/CustomSX1262Wrapper.h>
+#include <helpers/ArduinoHelpers.h>
+
+extern XiaoNrf52Board board;
+extern WRAPPER_CLASS radio_driver;
+extern VolatileRTCClock rtc_clock;
+
+bool radio_init();
+uint32_t radio_get_rng_seed();
+void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
+void radio_set_tx_power(uint8_t dbm);
+mesh::LocalIdentity radio_new_identity();