[HAL] Add macro guards to PicoHal

CMakeLists.txt

@@ -5,9 +5,8 @@ file(GLOB_RECURSE RADIOLIB_SOURCES
   "src/*.cpp"
 )
 
-# exclude all HAL source files, except the default Arduino HAL
+# exclude all HAL source files
 list(FILTER RADIOLIB_SOURCES EXCLUDE REGEX "src/hal/.*\\.cpp")
-list(APPEND RADIOLIB_SOURCES "src/hal/Arduino/ArduinoHal.cpp")
 
 if(ESP_PLATFORM)
   # Build RadioLib as an ESP-IDF component

examples/NonArduino/Pico/CMakeLists.txt

@@ -22,11 +22,11 @@ add_executable(${PROJECT_NAME}
     main.cpp
     "${CMAKE_CURRENT_SOURCE_DIR}/../../../../RadioLib/src/hal/RPiPico/PicoHal.cpp"
 )
+target_compile_definitions(${PROJECT_NAME} PUBLIC RADIOLIB_BUILD_RPI_PICO)
 
 # Pull in common dependencies
 target_link_libraries(${PROJECT_NAME} pico_stdlib hardware_spi hardware_gpio hardware_timer pico_multicore hardware_pwm RadioLib)
 
-
 pico_enable_stdio_usb(${PROJECT_NAME} 1)
 pico_enable_stdio_uart(${PROJECT_NAME} 0)
 

src/hal/RPiPico/PicoHal.cpp

@@ -1,5 +1,7 @@
 #include "PicoHal.h"
 
+#if defined(RADIOLIB_BUILD_RPI_PICO)
+
 // pre-calculated pulse-widths for 1200 and 2200Hz
 // we do this to save calculation time (see https://github.com/khoih-prog/RP2040_PWM/issues/6)
 #define SLEEP_1200 416.666
@@ -43,3 +45,5 @@ void PicoHal::tone(uint32_t pin, unsigned int frequency, unsigned long duration)
   toneLoopDuration = duration;
   multicore_launch_core1(toneLoop);
 }
+
+#endif

src/hal/RPiPico/PicoHal.h

@@ -1,6 +1,8 @@
 #ifndef PICO_HAL_H
 #define PICO_HAL_H
 
+#if defined(RADIOLIB_BUILD_RPI_PICO)
+
 // include RadioLib
 #include <RadioLib.h>
 
@@ -153,3 +155,5 @@ private:
 };
 
 #endif
+
+#endif