This PR introduces some major features while also changing the project structure to be more flexible for multiple platforms (e.g. host tooling). It also includes a lot of bugfixes, renamings for consistency purposes and dependency updates. Added features: 1. Pure Rust FSBL for the Zedboard. This first variant is simplistic. It is currently only capable of QSPI boot. It searches for a bitstream and ELF file inside the boot binary, flashes them and jumps to them. 2. QSPI flasher for the Zedboard. 3. DDR, QSPI, DEVC, private CPU timer and PLL configuration modules 3. Tooling to auto-generate board specific DDR and DDRIOB config parameters from the vendor provided ps7init.tcl file Changed project structure: 1. All target specific project are inside a dedicated workspace inside the `zynq` folder now. 2. All tool intended to be run on a host are inside a `tools` workspace 3. All other common projects are at the project root Major bugfixes: 1. SPI module: CPOL was not configured properly 2. Logger flush implementation was empty, implemented properly now.
		
			
				
	
	
	
		
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	Zedboard FPGA design for Rust
This is an example/reference design which was used to verify various components provided by this library. To minimize the amount of HW designs required, one project is provided. The design was kept as generic as possible. In principle, it should be possible to adapt the hardware design to other boards with modifications.
Pre-Requisites
- Vivado installation or Vitis installation which includes Vivado. This example design was created with/for Vivado 2024.1, but also might work for newer versions.
 - Zedboard board files added to the Vivado installation.
 
Loading the project and the block design with the GUI
You can load the project using the batch mode of vivado inside the folder where you want to
create the zedboard-rust project:
vivado -mode batch -source <path to zedboard-rust.tcl> -tclargs --overwrite
for example, to create the directory directly insdie this directory:
vivado -mode batch -source zedboard-rust.tcl -tclargs --overwrite
This should create a zedboard-rust Vivado project folder containing a zedboard-rust.xpr
project file. You can load this project file with Vivado:
vivado zedboard-rust.xpr
You can perform all the steps specified in the Vivado GUI as well using Execute TCL script and
Load Project.
Generating the SDT folder from a hardware description
You can generate a hardware description by building the block design by using Generate Bitstream
inside the Vivado GUI and then exporting the hardware description via
File -> Export -> Export Hardware. This allows to generate a *.xsa file which describes the
hardware.
After that, you can generate the SDT output folder which contains various useful files like
the ps7_init.tcl script. The provided  sdtgen.tcl and stdgen.py script simplify this process.
For example, the following command generates the SDT output folder inside a folder
named sdt_out for a hardware description files zedboard-rust/zedboard-rust.xsa,
assuming that the Vitis tool suite is installed at /tools/Xilinx/Vitis/2024.1:
export AMD_TOOLS="/tools/Xilinx/Vitis/2024.1"
./sdtgen.py -x ./zedboard-rust/zedboard-rust.xsa
Run stdgen.py -h for more information and configuration options. The stdgen.py is a helper
script which will invoke sdtgen.tcl to generate the SDT.