feat: add version command

Makefile

@@ -53,6 +53,11 @@ endif
 # Build global options
 ##############################################################################
 
+ifeq ($(VERSION),)
+  #VERSION="unknown"
+  VERSION="$(shell git describe --tags)"
+endif
+
 ##############################################################################
 # Architecture or project specific options
 #
@@ -200,7 +205,7 @@ CPPWARN = -Wall -Wextra -Wundef
 #
 
 # List all user C define here, like -D_DEBUG=1
-UDEFS = -DSHELL_CMD_TEST_ENABLED=FALSE -DSHELL_CMD_MEM_ENABLED=FALSE -DARM_MATH_CM0
+UDEFS = -DSHELL_CMD_TEST_ENABLED=FALSE -DSHELL_CMD_MEM_ENABLED=FALSE -DARM_MATH_CM0 -DVERSION=\"$(VERSION)\"
 
 # Define ASM defines here
 UADEFS =

main.c

@@ -1663,14 +1663,23 @@ static void cmd_stat(BaseSequentialStream *chp, int argc, char *argv[])
 }
 
 
+#ifndef VERSION
+#define VERSION "unknown"
+#endif
 
-
+static void cmd_version(BaseSequentialStream *chp, int argc, char *argv[])
+{
+  (void)argc;
+  (void)argv;
+  chprintf(chp, VERSION "\r\n");
+}
 
 #define SHELL_WA_SIZE THD_WORKING_AREA_SIZE(256)
 static THD_WORKING_AREA(waThread2, SHELL_WA_SIZE);
 
 static const ShellCommand commands[] =
 {
+    { "version", cmd_version },
     { "reset", cmd_reset },
     { "freq", cmd_freq },
     { "offset", cmd_offset },