From a3c1aa9f744c87d25bd2ccdf8307a9ff528a0637 Mon Sep 17 00:00:00 2001
From: m24h <jjkkxyz@hotmail.com>
Date: Thu, 11 Aug 2022 19:14:40 +0800
Subject: [PATCH] added important project infomation.

---
 readme.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/readme.md b/readme.md
index d730d0c..9d06241 100644
--- a/readme.md
+++ b/readme.md
@@ -10,6 +10,8 @@ The hardware GPIO pins (which can be modifed in file "DAP_config.h"):
     B8: Connected LED
     B12: Target Running LED
 
+Important: this is a Keil MDK5 project, but a compiler version 5 (ARMCC) is needed.
+
 ---------------------------- following is from original author -------------------------
 
 本工程从“技新”开源的DAPLINK修改来。