Scott Mabin MabezDev

To find the substitute path for the from section:

find $(rustc --print sysroot) -maxdepth 2 -mindepth 2  -type f -name "libstd-*" -exec strings {} \; | grep -o '^/rustc/[^/]\+/' | uniq

which produces something like /rustc/9a90d03ad171856dc016c2dcc19292ec49a8a26f/

Next install rust-src component if you haven't already. Then combine the output of rustc --print sysroot with /lib/rustlib/src/rust to find your downloaded sources.

Bootstrapping Rust with xtensa support

Build xtensa llvm from here https://esp32.com/viewtopic.php?t=9226&p=38466

But add the X86 target like so

cmake ../llvm-xtensa -DLLVM_TARGETS_TO_BUILD="Xtensa;X86" -DCMAKE_BUILD_TYPE=Release -G "Ninja"

Import your image or create image with GIMP.
Export as bmp -> advanced options -> 16bit
Then to get the raw bytes run tail -c $bytes image.bmp > image.raw where $bytes is w * h * 2 of the image. This removes the BMP header.

	/// Feed the WDT watchdog
	pub fn feed_wdt() {
	const RTC_WDT_BASE: u32 = 0x3ff48000;
	const RTC_WDT_WPROTECT: u32 = RTC_WDT_BASE + 0xa4;
	const RTC_WDT_FEED: u32 = RTC_WDT_BASE + 0xa0;

	unsafe {
	core::ptr::write_volatile(RTC_WDT_WPROTECT as *mut _, 0); // disable write protection
	{
	core::ptr::write_volatile(RTC_WDT_FEED as *mut _, 0x1); // feed the watch dog