From 0c28b5fa048dd997885a9f1724484dceb2e2c979 Mon Sep 17 00:00:00 2001
From: vc4 <287920192@qq.com>
Date: Wed, 10 Apr 2024 17:00:58 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=94=B9goto=5Fbootloader=E8=BF=9B?=
 =?UTF-8?q?=E5=85=A5=E9=94=99=E8=AF=AF=E7=9A=84bug?=
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---
 hc32flash.py | 32 +++++++++++++-------------------
 1 file changed, 13 insertions(+), 19 deletions(-)

diff --git a/hc32flash.py b/hc32flash.py
index 6f89772..6f58865 100755
--- a/hc32flash.py
+++ b/hc32flash.py
@@ -226,25 +226,19 @@ class SerialTransport():
         self.serial.close()
 
     def goto_bootloader(self):
-        _cnt = 0
-        while _cnt < 50:
-            time.sleep(0.01)
-            self.write(b'\x18\xFF'*10, flush=False)
-            step = _cnt % 20
-            if step == 0:
-                self.serial.rts = True
-                self.serial.dtr = True
-            elif step == 10:
-                self.serial.rts = False
-                self.serial.dtr = False
-            elif step > 10:
-                if self.serial.in_waiting:
-                    ack = self.read(self.serial.in_waiting)
-                    if ack[-6:] == b'\x11':
-                        time.sleep(1) # clear input buffer
-                        self.serial.flushInput()
-                        return True
-            _cnt += 1
+        self.serial.rts = True
+        self.serial.dtr = True
+        time.sleep(0.5)
+        self.serial.rts = False
+        self.serial.dtr = False
+        self.write(b'\x18\xFF'*10, flush=False)
+        time.sleep(0.5)
+        if self.serial.in_waiting:
+            ack = self.read(self.serial.in_waiting)
+            if ack[-6:] == b'\x11'*6:
+                time.sleep(3) # clear input buffer
+                self.serial.flushInput()
+                return True
         return False
 
     def check_lock(self):