From eee3950f2ee4a9b3d31ba4f0986a99500a7c216f Mon Sep 17 00:00:00 2001
From: marqs <mhiienka@niksula.hut.fi>
Date: Sat, 7 Mar 2026 23:47:28 +0200
Subject: [PATCH] fix multi-sector SD_Read

---
 software/sys_controller/fatfs/source/diskio.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/software/sys_controller/fatfs/source/diskio.c b/software/sys_controller/fatfs/source/diskio.c
index 873463d..e99f529 100644
--- a/software/sys_controller/fatfs/source/diskio.c
+++ b/software/sys_controller/fatfs/source/diskio.c
@@ -68,11 +68,16 @@ DRESULT disk_read (
 )
 {
     SDRESULTS res;
+    int i;
 
     if (!sdcard_dev.mount)
         return STA_NOINIT;
 
-    res = SD_Read(&sdcard_dev, buff, sector, 0, count*SD_BLK_SIZE);
+    for (i=0; i<count; i++) {
+        res = SD_Read(&sdcard_dev, (void*)&buff[i*SD_BLK_SIZE], sector+i, 0, SD_BLK_SIZE);
+        if (res != SD_OK)
+            return RES_PARERR;
+    }
 
     return (res == SD_OK) ? RES_OK : RES_PARERR;
 }