From 2bf2412992949a784527e5e35f6a4fbc6552bdf8 Mon Sep 17 00:00:00 2001
From: Brendan <2bndy5@gmail.com>
Date: Fri, 5 Jul 2024 09:39:08 -0700
Subject: [PATCH] [CMake] default to SPIDEV driver (#232)

per nRF24/RF24#971
---
 CMakeLists.txt                     |  5 ----
 cmake/AutoConfig_RF24_DRIVER.cmake | 42 ++++++++++++++++--------------
 examples_RPi/CMakeLists.txt        | 16 ++++--------
 3 files changed, 27 insertions(+), 36 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 07dc9099..9525b09e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -151,11 +151,6 @@ if(DEFINED SLOW_ADDR_POLL_RESPONSE)
     message(STATUS "SLOW_ADDR_POLL_RESPONSE set to ${SLOW_ADDR_POLL_RESPONSE}")
     target_compile_definitions(${LibTargetName} PUBLIC SLOW_ADDR_POLL_RESPONSE=${SLOW_ADDR_POLL_RESPONSE})
 endif()
-# conditionally disable interruot support (a pigpio specific feature)
-if("${LibPIGPIO}" STREQUAL "LibPIGPIO-NOTFOUND" OR DEFINED RF24_NO_INTERRUPT)
-    message(STATUS "Disabling IRQ pin support")
-    target_compile_definitions(${LibTargetName} PUBLIC RF24_NO_INTERRUPT)
-endif()
 
 ###########################
 # target install rules for the RF24Network lib
diff --git a/cmake/AutoConfig_RF24_DRIVER.cmake b/cmake/AutoConfig_RF24_DRIVER.cmake
index 6e942caf..99e04082 100644
--- a/cmake/AutoConfig_RF24_DRIVER.cmake
+++ b/cmake/AutoConfig_RF24_DRIVER.cmake
@@ -26,31 +26,33 @@ else()
 endif()
 
 
-if(${RF24_DRIVER} STREQUAL "UNKNOWN") # invokes automatic configuration
-    if("${SOC}" STREQUAL "BCM2708" OR "${SOC}" STREQUAL "BCM2709" OR "${SOC}" STREQUAL "BCM2835")
-        set(RF24_DRIVER RPi CACHE STRING "using folder /utility/RPi" FORCE)
-    elseif(NOT "${LibPIGPIO}" STREQUAL "LibPIGPIO-NOTFOUND")
-        message(STATUS "Found pigpio library: ${LibPIGPIO}")
-        set(RF24_DRIVER pigpio CACHE STRING "using folder /utility/pigpio" FORCE)
-    elseif(NOT "${LibWiringPi}" STREQUAL "LibWiringPi-NOTFOUND")
-        message(STATUS "Found wiringPi library: ${LibWiringPi}")
-        set(RF24_DRIVER wiringPi CACHE STRING "using folder /utility/wiringPi" FORCE)
-    elseif(NOT "${LibLittleWire}" STREQUAL "LibLittleWire-NOTFOUND")
-        message(STATUS "Found LittleWire library: ${LibLittleWire}")
-        set(RF24_DRIVER LittleWire CACHE STRING "using folder /utility/LittleWire" FORCE)
-    elseif(NOT "${LibMRAA}" STREQUAL "LibMRAA-NOTFOUND")
-        message(STATUS "Found MRAA library: ${LibMRAA}")
-        set(RF24_DRIVER MRAA CACHE STRING "using folder /utility/MRAA" FORCE)
-    elseif(SPIDEV_EXISTS) # should be a non-empty string if SPI is enabled
-        message(STATUS "detected that SPIDEV is enabled: ${SPIDEV_EXISTS}")
-        set(RF24_DRIVER SPIDEV CACHE STRING "using folder /utility/SPIDEV" FORCE)
-    endif()
-endif()
+# if(${RF24_DRIVER} STREQUAL "UNKNOWN") # invokes automatic configuration
+#     if("${SOC}" STREQUAL "BCM2708" OR "${SOC}" STREQUAL "BCM2709" OR "${SOC}" STREQUAL "BCM2835")
+#         set(RF24_DRIVER RPi CACHE STRING "using folder /utility/RPi" FORCE)
+#     elseif(NOT "${LibPIGPIO}" STREQUAL "LibPIGPIO-NOTFOUND")
+#         message(STATUS "Found pigpio library: ${LibPIGPIO}")
+#         set(RF24_DRIVER pigpio CACHE STRING "using folder /utility/pigpio" FORCE)
+#     elseif(NOT "${LibWiringPi}" STREQUAL "LibWiringPi-NOTFOUND")
+#         message(STATUS "Found wiringPi library: ${LibWiringPi}")
+#         set(RF24_DRIVER wiringPi CACHE STRING "using folder /utility/wiringPi" FORCE)
+#     elseif(NOT "${LibLittleWire}" STREQUAL "LibLittleWire-NOTFOUND")
+#         message(STATUS "Found LittleWire library: ${LibLittleWire}")
+#         set(RF24_DRIVER LittleWire CACHE STRING "using folder /utility/LittleWire" FORCE)
+#     elseif(NOT "${LibMRAA}" STREQUAL "LibMRAA-NOTFOUND")
+#         message(STATUS "Found MRAA library: ${LibMRAA}")
+#         set(RF24_DRIVER MRAA CACHE STRING "using folder /utility/MRAA" FORCE)
+#     elseif(SPIDEV_EXISTS) # should be a non-empty string if SPI is enabled
+#         message(STATUS "detected that SPIDEV is enabled: ${SPIDEV_EXISTS}")
+#         set(RF24_DRIVER SPIDEV CACHE STRING "using folder /utility/SPIDEV" FORCE)
+#     endif()
+# endif()
 
 # override the auto-detect if RF24_DRIVER is defined in an env var
 if(DEFINED ENV{RF24_DRIVER})
     message(STATUS "RF24_DRIVER (set from env var) = $ENV{RF24_DRIVER}")
     set(RF24_DRIVER $ENV{RF24_DRIVER} CACHE STRING "" FORCE)
+elseif(${RF24_DRIVER} STREQUAL "UNKNOWN")
+    set(RF24_DRIVER SPIDEV CACHE STRING "using folder RF24/utility/SPIDEV" FORCE)
 endif()
 
 message(STATUS "Using driver: ${RF24_DRIVER}")
diff --git a/examples_RPi/CMakeLists.txt b/examples_RPi/CMakeLists.txt
index 15973108..7fa11a16 100644
--- a/examples_RPi/CMakeLists.txt
+++ b/examples_RPi/CMakeLists.txt
@@ -43,15 +43,13 @@ elseif("${RF24_DRIVER}" STREQUAL "wiringPi")
     else()
         message(FATAL "Lib ${RF24_DRIVER} not found.")
     endif()
-elseif(NOT "${LibPIGPIO}" STREQUAL "LibPIGPIO-NOTFOUND" AND NOT DEFINED RF24_NO_INTERUPT)
-    if(NOT "${RF24_DRIVER}" STREQUAL "pigpio")
-        message(STATUS "linking to ${LibPIGPIO} for interrupt support")
-    else()
+elseif("${RF24_DRIVER}" STREQUAL "pigpio")
+    if(NOT "${LibPIGPIO}" STREQUAL "LibPIGPIO-NOTFOUND")
         message(STATUS "linking to ${LibPIGPIO}")
+        list(APPEND linked_libs ${LibPIGPIO})
+    else()
+        message(FATAL "Lib ${RF24_DRIVER} not found.")
     endif()
-    list(APPEND linked_libs ${LibPIGPIO})
-else()
-    message(STATUS "Disabling IRQ pin support")
 endif()
 
 foreach(example ${EXAMPLES_LIST})
@@ -59,8 +57,4 @@ foreach(example ${EXAMPLES_LIST})
     add_executable(${example} ${example}.cpp)
     # link the RF24 lib to the target.
     target_link_libraries(${example} PUBLIC ${linked_libs})
-    # conditionally disable interruot support (a pigpio specific feature)
-    if("${LibPIGPIO}" STREQUAL "LibPIGPIO-NOTFOUND" OR DEFINED RF24_NO_INTERRUPT)
-        target_compile_definitions(${example} PUBLIC RF24_NO_INTERRUPT)
-    endif()
 endforeach()