From ff8bf96abb6b4c50d1dc67b5e89144883318510a Mon Sep 17 00:00:00 2001
From: Andy CA6JAU <juribeparada@gmail.com>
Date: Sun, 16 Apr 2017 11:48:41 -0300
Subject: [PATCH] Adding GPIO sequence to enter serial bootloader mode (F446)

---
 Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 569bde4..ea1ac9d 100644
--- a/Makefile
+++ b/Makefile
@@ -175,11 +175,11 @@ endif
 
 deploy-pi:
 ifneq ($(wildcard /usr/local/bin/stm32flash),)
-	/usr/local/bin/stm32flash -w bin/outp.bin -g 0x0 /dev/ttyAMA0
+	/usr/local/bin/stm32flash -w bin/outp.bin -g 0x0 -R -i 20,-21,21:-20,21 /dev/ttyAMA0
 endif
 
 ifneq ($(wildcard /usr/bin/stm32flash),)
-	/usr/bin/stm32flash -w bin/outp.bin -g 0x0 /dev/ttyAMA0
+	/usr/bin/stm32flash -w bin/outp.bin -g 0x0 -i 20,-21,21:-20,21 /dev/ttyAMA0
 endif
 
 # Export the current git version if the index file exists, else 000...