From 09b40ca7bcb8e30df0cf374946327f858771f456 Mon Sep 17 00:00:00 2001
From: xp <a.xp@live.com>
Date: Sat, 25 Apr 2020 20:37:26 +0800
Subject: [PATCH] update

---
 flashloaders/stm32f4lv.s |  24 ++++++++++++------------
 flashloaders/stm32f7lv.o | Bin 0 -> 792 bytes
 flashloaders/stm32f7lv.s |  24 ++++++++++++------------
 3 files changed, 24 insertions(+), 24 deletions(-)
 create mode 100644 flashloaders/stm32f7lv.o

diff --git a/flashloaders/stm32f4lv.s b/flashloaders/stm32f4lv.s
index 92f70fa..c338b98 100644
--- a/flashloaders/stm32f4lv.s
+++ b/flashloaders/stm32f4lv.s
@@ -7,19 +7,19 @@ mycopy:
     ldr r10, flash_off_sr
     add r10, r10, r12
 
-myloop:
-    # copy 1 byte each time and 4 times as one group
-    ldrb r3, [r0]
-    ldrb r4, [r0, #1]
-    ldrb r5, [r0, #2]
-    ldrb r6, [r0, #3]
-    strb r3, [r1]
-    strb r4, [r1, #1]
-    strb r5, [r1, #2]
-    strb r6, [r1, #3]
+    # original r2 indicates the count of 4 bytes need to copy,
+    # but we can only copy one byte each time.
+    # as we have no flash larger than 1GB, we do a little trick here.
+    ldr r3, =4
+    mul r2, r2, r3
 
-    add r0, r0, #4
-    add r1, r1, #4
+myloop:
+    # copy 1 byte
+    ldrb r3, [r0]
+    strb r3, [r1]
+
+    add r0, r0, #1
+    add r1, r1, #1
 
     # wait if FLASH_SR == 1
 mywait:
diff --git a/flashloaders/stm32f7lv.o b/flashloaders/stm32f7lv.o
new file mode 100644
index 0000000000000000000000000000000000000000..f71d5e6366b415ff04a5340db3c4e011bef88b53
GIT binary patch
literal 792
zcmah{y-EW?5dQWqQG-8;T56*P3_%ZtfPyI^sFfk$3&cHhA%TQDaw{g4kD$Gc_!t)I
zBgD>5@BzeV6SQ$Acbi-aabV{AX7}5<*_*vQJU$XaK$}1YqYQWnl6Y<)$Y2VSc<tw&
z$Zy{cN*^)P_%T1t_OyqdfanSF_*J^P?_+E6LnObucRgVs`~HjvJR)xt=BUp85(Vi<
zyACl=G`@4VS;WNbWHDh3KJ!N~$2tQ{jLS`0;dXb2=LKeloQXh^Vt%+LuuOa*lCKe8
zjpSM4!QFXLV4GsJKCfys5sPSn6n9f?NWWILrSBlE!pyB!%YF;ZPQ!IQf(uz!1WubE
zT_JYndL6*>J542RLe&berkQfu3RXob3Cs3<So<eMODff>+vm#hbw~drkAnZ%L@4FE
z7DCPt3;7Bm>&!4$A!^_~wsrC;^8a)jfyN^k7}w)jXw&r=qf@@7yi3mg@@%=k6nTPN
cf0HOq>EIrd&~!b1Z&BS1ZH(SSa7RA!3p%Ax&;S4c

literal 0
HcmV?d00001

diff --git a/flashloaders/stm32f7lv.s b/flashloaders/stm32f7lv.s
index 013b56f..55c9add 100644
--- a/flashloaders/stm32f7lv.s
+++ b/flashloaders/stm32f7lv.s
@@ -7,19 +7,19 @@ mycopy:
     ldr r10, flash_off_sr
     add r10, r10, r12
 
-myloop:
-    # copy 1 byte each time and 4 times as one group
-    ldrb r3, [r0]
-    ldrb r4, [r0, #1]
-    ldrb r5, [r0, #2]
-    ldrb r6, [r0, #3]
-    strb r3, [r1]
-    strb r4, [r1, #1]
-    strb r5, [r1, #2]
-    strb r6, [r1, #3]
+    # original r2 indicates the count of 4 bytes need to copy,
+    # but we can only copy one byte each time.
+    # as we have no flash larger than 1GB, we do a little trick here.
+    ldr r3, =4
+    mul r2, r2, r3
 
-    add r0, r0, #4
-    add r1, r1, #4
+myloop:
+    # copy 1 byte
+    ldrb r3, [r0]
+    strb r3, [r1]
+
+    add r0, r0, #1
+    add r1, r1, #1
 
     # memory barrier
     dsb sy