first and working ethernet

CMakeLists.txt

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+# Generated Cmake Pico project file
+
+cmake_minimum_required(VERSION 3.13)
+
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+# Initialise pico_sdk from installed location
+# (note this can come from environment, CMake cache etc)
+
+# == DO NOT EDIT THE FOLLOWING LINES for the Raspberry Pi Pico VS Code Extension to work ==
+if(WIN32)
+    set(USERHOME $ENV{USERPROFILE})
+else()
+    set(USERHOME $ENV{HOME})
+endif()
+set(sdkVersion 2.1.1)
+set(toolchainVersion 14_2_Rel1)
+set(picotoolVersion 2.1.1)
+set(picoVscode ${USERHOME}/.pico-sdk/cmake/pico-vscode.cmake)
+if (EXISTS ${picoVscode})
+    include(${picoVscode})
+endif()
+# ====================================================================================
+set(PICO_BOARD waveshare_rp2040_eth CACHE STRING "Board type")
+
+# Pull in Raspberry Pi Pico SDK (must be before project)
+include(pico_sdk_import.cmake)
+
+project(barnum C CXX ASM)
+
+# Initialise the Raspberry Pi Pico SDK
+pico_sdk_init()
+
+# Add executable. Default name is the project name, version 0.1
+
+add_executable(barnum barnum.c ch9120.c)
+
+# Add initial version without ethernet
+add_executable(barnum-initial barnum-initial.c)
+
+pico_set_program_name(barnum "barnum")
+pico_set_program_version(barnum "0.1")
+
+pico_set_program_name(barnum-initial "barnum-initial")
+pico_set_program_version(barnum-initial "0.1")
+
+# Generate PIO header
+pico_generate_pio_header(barnum ${CMAKE_CURRENT_LIST_DIR}/blink.pio)
+pico_generate_pio_header(barnum ${CMAKE_CURRENT_LIST_DIR}/ws2812.pio)
+pico_generate_pio_header(barnum-initial ${CMAKE_CURRENT_LIST_DIR}/blink.pio)
+pico_generate_pio_header(barnum-initial ${CMAKE_CURRENT_LIST_DIR}/ws2812.pio)
+
+# Modify the below lines to enable/disable output over UART/USB
+pico_enable_stdio_uart(barnum 1)
+pico_enable_stdio_usb(barnum 1)
+
+# Enable stdio for initial version
+pico_enable_stdio_uart(barnum-initial 0)
+pico_enable_stdio_usb(barnum-initial 1)
+
+# Add the standard library to the build
+target_link_libraries(barnum
+        pico_stdlib)
+
+target_link_libraries(barnum-initial
+        pico_stdlib)
+
+# Add the standard include files to the build
+target_include_directories(barnum PRIVATE
+        ${CMAKE_CURRENT_LIST_DIR}
+)
+
+target_include_directories(barnum-initial PRIVATE
+        ${CMAKE_CURRENT_LIST_DIR}
+)
+
+# Add any user requested libraries
+target_link_libraries(barnum 
+        hardware_uart
+        hardware_pio
+        hardware_timer
+        )
+
+target_link_libraries(barnum-initial 
+        hardware_spi
+        hardware_i2c
+        hardware_dma
+        hardware_pio
+        hardware_interp
+        hardware_timer
+        hardware_watchdog
+        )
+
+pico_add_extra_outputs(barnum)
+pico_add_extra_outputs(barnum-initial)
+