ID logic

.gitignore

@@ -5,3 +5,5 @@ __pycache__/
 *.hex
 *.elf
 commitid.h
+id.h
+ID

Makefile

@@ -16,19 +16,22 @@ COMPILE = avr-gcc -Wall -Os -mmcu=$(DEVICE)
 
 .PHONY: clean all
 
-.INTERMEDIATE: commitid.h main.o
+.INTERMEDIATE: commitid.h id.h message.o main.o
 
 # symbolic targets:
 all:	main.hex
 
 clean:
-		rm -f *.o *.elf *.hex commitid.h
+		rm -f *.o *.elf *.hex commitid.h id.h
 
 commitid.h: .git/refs/heads
 	cog -r *.c *.h
 	./define_commit_id.py > $@
 
-%.o: %.c common.h commitid.h
+id.h: ID
+	./define_id.py > $@
+
+%.o: %.c common.h commitid.h id.h
 		$(COMPILE) -c $< -o $@
 
 .S.o:

define_id.py

+#!/usr/bin/python3
+
+import re
+
+with open("ID") as f:
+    content = f.read().strip()
+a = re.match("^0x([0-9a-fA-F]{2})$", content)
+if not a:
+    raise SyntaxError
+
+(hbid,) = a.groups()
+
+bid = int(hbid, 16)
+hbid = f"{bid:02x}"
+print(f"#define BID 0x{hbid}")
+print(f"#define BID_C0 '{hbid[0]}'")
+print(f"#define BID_C1 '{hbid[1]}'")

id.h

-/*[[[cog
-bid = 0x01
-hbid = f"{bid:02x}"
-cog.out(f"#define BID 0x{hbid}\n")
-cog.out(f"#define BID_C0 '{hbid[0]}'\n")
-cog.out(f"#define BID_C1 '{hbid[1]}'\n")
-]]]*/
-#define BID 0x01
-#define BID_C0 '0'
-#define BID_C1 '1'
-///[[[end]]]