From 6dd8682fa87d3f03ca685f89b7f3c36e95d561fb Mon Sep 17 00:00:00 2001
From: JasonCang <951253606@qq.com>
Date: Wed, 11 Aug 2021 19:42:31 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=94=B9=E6=89=87=E5=8C=BA=E8=AE=A1?=
 =?UTF-8?q?=E7=AE=97=E9=94=99=E8=AF=AF=E7=9A=84bug?=
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---
 bsp/stm32/libraries/HAL_Drivers/drv_flash/drv_flash_f7.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/bsp/stm32/libraries/HAL_Drivers/drv_flash/drv_flash_f7.c b/bsp/stm32/libraries/HAL_Drivers/drv_flash/drv_flash_f7.c
index 522dc8e6a7..a88dd6bf80 100644
--- a/bsp/stm32/libraries/HAL_Drivers/drv_flash/drv_flash_f7.c
+++ b/bsp/stm32/libraries/HAL_Drivers/drv_flash/drv_flash_f7.c
@@ -8,6 +8,7 @@
  * 2018-12-5      SummerGift   first version
  * 2019-3-2       jinsheng     add Macro judgment
  * 2020-1-6       duminmin     support single bank mode
+ * 2021-8-11      CX           fix the sector calculation error bug
  */
 
 #include "board.h"
@@ -280,7 +281,7 @@ int stm32_flash_erase(rt_uint32_t addr, size_t size)
     /* Get the 1st sector to erase */
     FirstSector = GetSector(addr);
     /* Get the number of sector to erase from 1st sector*/
-    NbOfSectors = GetSector(addr + size) - FirstSector + 1;
+    NbOfSectors = GetSector(addr + size - 1) - FirstSector + 1;
     /* Fill EraseInit structure*/
     EraseInitStruct.TypeErase     = FLASH_TYPEERASE_SECTORS;
     EraseInitStruct.VoltageRange  = FLASH_VOLTAGE_RANGE_3;