From 6e745e2035e9ef520895ed6ca0cbe80cf8891ce6 Mon Sep 17 00:00:00 2001
From: khalidjmi1200 <51022885+khalidjmi1200@users.noreply.github.com>
Date: Wed, 30 Oct 2019 12:12:28 +0900
Subject: [PATCH 1/2] Update spiffs.h

---
 src/spiffs.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/spiffs.h b/src/spiffs.h
index 534c3df..2335e22 100644
--- a/src/spiffs.h
+++ b/src/spiffs.h
@@ -468,7 +468,7 @@ s32_t SPIFFS_read(spiffs *fs, spiffs_file fh, void *buf, s32_t len);
  * @param len           how much to write
  * @returns number of bytes written, or -1 if error
  */
-s32_t SPIFFS_write(spiffs *fs, spiffs_file fh, void *buf, s32_t len);
+s32_t SPIFFS_write(spiffs *fs, spiffs_file fh, const void *buf, s32_t len);
 
 /**
  * Moves the read/write file offset. Resulting offset is returned or negative if error.

From ecd568f94e12b3a6d039c833fd60e62296ebe912 Mon Sep 17 00:00:00 2001
From: khalidjmi1200 <51022885+khalidjmi1200@users.noreply.github.com>
Date: Wed, 30 Oct 2019 12:13:54 +0900
Subject: [PATCH 2/2] Update spiffs_hydrogen.c

---
 src/spiffs_hydrogen.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/spiffs_hydrogen.c b/src/spiffs_hydrogen.c
index 235aaaa..a43ee98 100644
--- a/src/spiffs_hydrogen.c
+++ b/src/spiffs_hydrogen.c
@@ -432,7 +432,7 @@ s32_t SPIFFS_read(spiffs *fs, spiffs_file fh, void *buf, s32_t len) {
 
 
 #if !SPIFFS_READ_ONLY
-static s32_t spiffs_hydro_write(spiffs *fs, spiffs_fd *fd, void *buf, u32_t offset, s32_t len) {
+static s32_t spiffs_hydro_write(spiffs *fs, spiffs_fd *fd, const void *buf, u32_t offset, s32_t len) {
   (void)fs;
   s32_t res = SPIFFS_OK;
   s32_t remaining = len;
@@ -455,7 +455,7 @@ static s32_t spiffs_hydro_write(spiffs *fs, spiffs_fd *fd, void *buf, u32_t offs
 }
 #endif // !SPIFFS_READ_ONLY
 
-s32_t SPIFFS_write(spiffs *fs, spiffs_file fh, void *buf, s32_t len) {
+s32_t SPIFFS_write(spiffs *fs, spiffs_file fh, const void *buf, s32_t len) {
   SPIFFS_API_DBG("%s "_SPIPRIfd " "_SPIPRIi "\n", __func__, fh, len);
 #if SPIFFS_READ_ONLY
   (void)fs; (void)fh; (void)buf; (void)len;