Avoid throttle down by using picow_fast board def

.github/workflows/build.yml

@@ -67,7 +67,7 @@ jobs:
         working-directory: ${{github.workspace}}/build
         run: |
           mkdir -p $OUTPUT_DIR
-          cmake $GITHUB_WORKSPACE/sw -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DPROJECT_TYPE="NE2K" -DPICO_BOARD=pico_w #-DUSE_LTO=1
+          cmake $GITHUB_WORKSPACE/sw -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DPROJECT_TYPE="NE2K" -DPICO_BOARD=picow_fast #-DUSE_LTO=1
           cmake --build . --config $BUILD_TYPE --parallel $(nproc)
           cp pg-ne2k.uf2 $OUTPUT_DIR/pg-ne2k.uf2
 

sw/CMakeLists.txt

@@ -334,7 +334,6 @@ function(build_ne2k TARGET_NAME MULTIFW)
     target_link_libraries(
         ${TARGET_NAME}
         ne2000        
-        pico_cyw43_arch_none
     )
 endfunction()
 

sw/ne2000play.cpp

@@ -33,10 +33,8 @@ extern uint LED_PIN;
 void play_ne2000() {
     //flash_safe_execute_core_init();
     puts("starting core 1 ne2000");
-    set_sys_clock_khz(240000, true);//temporary hack because of board definition flash divider
     PG_EnableWifi();
     PG_Wifi_Connect(settings.WiFi.ssid, settings.WiFi.password);
-    set_sys_clock_khz(366000, true);
 
     static bool flag = false;
     while(1) {

sw/picow_fast.h

@@ -0,0 +1,17 @@
+// Board config file for overclocked Pico W
+
+// The below lines aren't just comments - they're directives to the Pico SDK cmake system
+// pico_cmake_set PICO_PLATFORM        = rp2040
+// pico_cmake_set PICO_CYW43_SUPPORTED = 1
+
+#ifndef _BOARDS_PICOW_FAST_H
+#define _BOARDS_PICOW_FAST_H
+
+// Allow extra time for xosc to start.
+#define PICO_XOSC_STARTUP_DELAY_MULTIPLIER 64
+
+// Slower flash to assist restarts when flashing on the fly
+#define PICO_FLASH_SPI_CLKDIV 4
+
+#include "boards/pico_w.h"
+#endif