readme: updated readme to better reflect current functionality

Author: lromor

README.md

@@ -6,14 +6,20 @@
 This command-line tool converts [FASM][fasm-spec] files into bitstreams, simplifying the assembly of human-readable FPGA configurations into the binary formats needed to program various FPGAs.
 
 At this stage, it can generate a set of frames in the same manner as [fasm2frames](https://github.com/chipsalliance/f4pga-xc-fasm/blob/25dc605c9c0896204f0c3425b52a332034cf5e5c/xc_fasm/fasm2frames.py).
-It has been tested with the Artix-7 [counter example][counter-example], where it produces identical frames—at approximately 10 times the speed compared to the pure Python textX based parser implementation.
+It has been tested with the Artix-7 [counter example][counter-example], where it produces identical frames—at and a working bitstream at approximately 10 times the speed compared to the pure Python textX based parser implementation.
 
 ## Usage
 
 First, install [Bazel][bazel] and ensure you have a basic C/C++ toolchain set up. Then run:
 
 ```
-bazel run -c opt //fpga:fpga-as -- --prjxray_db_path=/some/path/prjxray-db/artix7 --part=xc7a35tcsg324-1 < /some/path.fasm
+bazel run -c opt //fpga:fpga-as -- --prjxray_db_path=/some/path/prjxray-db/artix7 --part=xc7a35tcsg324-1 < /some/path.fasm > output.bit
+```
+
+Finally, load the bitstream in your FPGA using [openFPGALoader][open-fpga-loader]
+
+```
+openFPGALoader -b arty output.bit
 ```
 
 ## Installation
@@ -59,3 +65,4 @@ Using this metadata, you can search the segbits database for the specific featur
 [fasm-spec]: https://fasm.readthedocs.io/en/stable/#
 [bazel]: https://bazel.build/
 [counter-example]: https://github.com/chipsalliance/f4pga-examples/blob/13f11197b33dae1cde3bf146f317d63f0134eacf/xc7/counter_test/counter.v
+[open-fpga-loader]: https://github.com/trabucayre/openFPGALoader

shell.nix

@@ -31,6 +31,9 @@ pkgs.mkShell {
     pprof
     perf_data_converter
     valgrind
+
+    # FPGA utils.
+    openfpgaloader
   ];
 
   CLANG_TIDY="${clang_for_tidy}/bin/clang-tidy";