From f3be7cb427bdb390b74ca474db3bf7c14b37297b Mon Sep 17 00:00:00 2001
From: LemonBoy <thatlemon@gmail.com>
Date: Sun, 13 Aug 2017 17:45:18 +0200
Subject: [PATCH] Correct calculation of the erase sector size

The specification states that the real value is obtained by increasing
by one the value extracted from the csd register.
---
 SDBlockDevice.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/SDBlockDevice.cpp b/SDBlockDevice.cpp
index 3dc70cc..22576d1 100644
--- a/SDBlockDevice.cpp
+++ b/SDBlockDevice.cpp
@@ -941,7 +941,7 @@ uint32_t SDBlockDevice::_sd_sectors() {
                 _erase_size = BLOCK_SIZE_HC;
             } else {
                 // ERASE_BLK_EN = 1: Erase in multiple of SECTOR_SIZE supported
-                _erase_size = ext_bits(csd, 45, 39);
+                _erase_size = ext_bits(csd, 45, 39) + 1;
             }
             break;