From 5adb4421ef9b414f8f1df3e6df928942a3a4ebc4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?King=20K=C3=A9vin?= <kingkevin@cuvoodoo.info>
Date: Wed, 17 Apr 2024 07:47:46 +0200
Subject: [PATCH] add build date

---
 examples/device/hid_cdc_passkey/src/date.h | 65 ++++++++++++++++++++++
 examples/device/hid_cdc_passkey/src/main.c |  5 +-
 2 files changed, 69 insertions(+), 1 deletion(-)
 create mode 100644 examples/device/hid_cdc_passkey/src/date.h

diff --git a/examples/device/hid_cdc_passkey/src/date.h b/examples/device/hid_cdc_passkey/src/date.h
new file mode 100644
index 000000000..6922b4e37
--- /dev/null
+++ b/examples/device/hid_cdc_passkey/src/date.h
@@ -0,0 +1,65 @@
+#pragma once
+
+/** build year as number */
+#define COMPUTE_BUILD_YEAR \
+    ( \
+        (__DATE__[ 7] - '0') * 1000 + \
+        (__DATE__[ 8] - '0') *  100 + \
+        (__DATE__[ 9] - '0') *   10 + \
+        (__DATE__[10] - '0') \
+    )
+/** build day as number */
+#define COMPUTE_BUILD_DAY \
+    ( \
+        ((__DATE__[4] >= '0') ? (__DATE__[4] - '0') * 10 : 0) + \
+        (__DATE__[5] - '0') \
+    )
+/** check if build month is January */
+#define BUILD_MONTH_IS_JAN (__DATE__[0] == 'J' && __DATE__[1] == 'a' && __DATE__[2] == 'n')
+/** check if build month is February */
+#define BUILD_MONTH_IS_FEB (__DATE__[0] == 'F')
+/** check if build month is March */
+#define BUILD_MONTH_IS_MAR (__DATE__[0] == 'M' && __DATE__[1] == 'a' && __DATE__[2] == 'r')
+/** check if build month is April */
+#define BUILD_MONTH_IS_APR (__DATE__[0] == 'A' && __DATE__[1] == 'p')
+/** check if build month is May */
+#define BUILD_MONTH_IS_MAY (__DATE__[0] == 'M' && __DATE__[1] == 'a' && __DATE__[2] == 'y')
+/** check if build month is June */
+#define BUILD_MONTH_IS_JUN (__DATE__[0] == 'J' && __DATE__[1] == 'u' && __DATE__[2] == 'n')
+/** check if build month is July */
+#define BUILD_MONTH_IS_JUL (__DATE__[0] == 'J' && __DATE__[1] == 'u' && __DATE__[2] == 'l')
+/** check if build month is August */
+#define BUILD_MONTH_IS_AUG (__DATE__[0] == 'A' && __DATE__[1] == 'u')
+/** check if build month is September */
+#define BUILD_MONTH_IS_SEP (__DATE__[0] == 'S')
+/** check if build month is October */
+#define BUILD_MONTH_IS_OCT (__DATE__[0] == 'O')
+/** check if build month is November */
+#define BUILD_MONTH_IS_NOV (__DATE__[0] == 'N')
+/** check if build month is December */
+#define BUILD_MONTH_IS_DEC (__DATE__[0] == 'D')
+/** build month as number */
+#define COMPUTE_BUILD_MONTH \
+    ( \
+        (BUILD_MONTH_IS_JAN) ?  1 : \
+        (BUILD_MONTH_IS_FEB) ?  2 : \
+        (BUILD_MONTH_IS_MAR) ?  3 : \
+        (BUILD_MONTH_IS_APR) ?  4 : \
+        (BUILD_MONTH_IS_MAY) ?  5 : \
+        (BUILD_MONTH_IS_JUN) ?  6 : \
+        (BUILD_MONTH_IS_JUL) ?  7 : \
+        (BUILD_MONTH_IS_AUG) ?  8 : \
+        (BUILD_MONTH_IS_SEP) ?  9 : \
+        (BUILD_MONTH_IS_OCT) ? 10 : \
+        (BUILD_MONTH_IS_NOV) ? 11 : \
+        (BUILD_MONTH_IS_DEC) ? 12 : \
+        /* error default */  99 \
+    )
+/** check if build date is unknown */
+#define BUILD_DATE_IS_BAD (__DATE__[0] == '?')
+/** build year as number if known, or 0 if unknown */
+#define BUILD_YEAR  ((BUILD_DATE_IS_BAD) ? 0 : COMPUTE_BUILD_YEAR)
+/** build month as number if known, or 0 if unknown */
+#define BUILD_MONTH ((BUILD_DATE_IS_BAD) ? 99 : COMPUTE_BUILD_MONTH)
+/** build day as number if known, or 0 if unknown */
+#define BUILD_DAY   ((BUILD_DATE_IS_BAD) ? 99 : COMPUTE_BUILD_DAY)
diff --git a/examples/device/hid_cdc_passkey/src/main.c b/examples/device/hid_cdc_passkey/src/main.c
index 62bdeb414..2b6612db2 100644
--- a/examples/device/hid_cdc_passkey/src/main.c
+++ b/examples/device/hid_cdc_passkey/src/main.c
@@ -13,6 +13,7 @@
 #include "usb_descriptors.h"
 #include "keylayouts.h"
 #include "WjCryptLib_Sha256.h"
+#include "date.h"
 
 // get the length of an array
 #define LENGTH(x) (sizeof(x) / sizeof((x)[0]))
@@ -266,7 +267,9 @@ int main(void)
   // init device stack on configured roothub port
   tud_init(BOARD_TUD_RHPORT);
 
-  printf("\r\npasskey v2\r\n");
+  printf("\r\npasskey\r\n");
+  printf("hardware version: 2\r\n"); // for now we just have version 2
+	printf("firmware date: %04u-%02u-%02u\r\n", BUILD_YEAR, BUILD_MONTH, BUILD_DAY); // show firmware build date
   load_config();
 
   FLASH_OBProgramInitTypeDef ob;