feat: add STM32 four-channel weighing firmware

STM32_4路称重_Git提交精简工程/gcc_build/extract_sources.pl

@@ -0,0 +1,13 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+my $project = shift @ARGV or die "usage: $0 Project.uvprojx\n";
+open my $fh, '<', $project or die "cannot open $project: $!\n";
+while (my $line = <$fh>) {
+    next unless $line =~ m{<FilePath>\.\.\\(.+\.c)</FilePath>};
+    my $path = $1;
+    $path =~ s{\\}{/}g;
+    print "../src/$path ";
+}
+close $fh;