Bsongis/ram saving (#6685)

RAM saving. Stacks reduced to have some more RAM available than 2.2 on all boards

tools/extract-map.py

@@ -0,0 +1,48 @@
+#!/usr/bin/python3
+
+import argparse
+
+
+def line_index(lines, start):
+    for i, line in enumerate(lines):
+        if line.startswith(start):
+            return i
+
+
+def extract_vars(lines):
+    result = []
+    lines = lines[line_index(lines, ".data"):line_index(lines, ".memory")]
+    i = 0
+    while i < len(lines):
+        line = lines[i]
+        i += 1
+        if line.startswith("*"):
+            continue
+        if line.startswith(" .data.") or line.startswith(" .bss."):
+            fields = (line + lines[i]).split()
+            # print(fields)
+            i += 1
+            var = fields[0].split(".")[-1]
+            offset = int(fields[1], 16)
+            size = int(fields[2], 16)
+            result.append((var, offset, size))
+    return result
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Extract firmware.map")
+    parser.add_argument("file", type=argparse.FileType("r"))
+
+    args = parser.parse_args()
+
+    f = args.file
+    lines = f.readlines()
+
+    vars = extract_vars(lines)
+    vars.sort(key=lambda var: "%08d %s" % (var[2], var[0]))
+    for var, offset, size in vars:
+        print("%s\t %d" % (var, size))
+
+
+if __name__ == "__main__":
+    main()