(mynewt-core) branch master updated: tinyusb/msc_fat_view: Add support for bigger buffer

[jerzy]

This is an automated email from the ASF dual-hosted git repository.

jerzy pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/mynewt-core.git


The following commit(s) were added to refs/heads/master by this push:
     new 8d1a49d96 tinyusb/msc_fat_view: Add support for bigger buffer
8d1a49d96 is described below

commit 8d1a49d962f6e2af8a7acb6095ed3e4183f57705
Author: Jerzy Kasenberg <jerzy.kasenb...@codecoup.pl>
AuthorDate: Fri Mar 13 19:38:11 2026 +0100

    tinyusb/msc_fat_view: Add support for bigger buffer
    
    So far msc_fat_view assumed that buffer size for
    read and writes is 512 bytes.
    
    Now it can utilized bigger buffers.
    Buffer size can be set by syscfg value
    USBD_MSC_EP_BUFSIZE.
    
    Setting this to bigger size can improve performance.
    
    Signed-off-by: Jerzy Kasenberg <je...@apache.org>
    Signed-off-by: Jerzy Kasenberg <jerzy.kasenb...@codecoup.pl>
---
 hw/usb/tinyusb/msc_fat_view/src/msc_fat_view.c | 29 +++++++++++++++-----------
 1 file changed, 17 insertions(+), 12 deletions(-)

diff --git a/hw/usb/tinyusb/msc_fat_view/src/msc_fat_view.c 
b/hw/usb/tinyusb/msc_fat_view/src/msc_fat_view.c
index 83decb292..5c825a429 100644
--- a/hw/usb/tinyusb/msc_fat_view/src/msc_fat_view.c
+++ b/hw/usb/tinyusb/msc_fat_view/src/msc_fat_view.c
@@ -1383,7 +1383,12 @@ tud_msc_read10_cb(uint8_t lun, uint32_t lba, uint32_t 
offset, void *buffer, uint
     if (medium_state < MEDIUM_RELOAD) {
         return -1;
     }
-    msc_fat_view_read_sector(lba, buffer);
+    MSC_FAT_VIEW_LOG_DEBUG("SCSI READ10 %d, %d, %d\n", (int)lba, (int)offset,
+                           (int)bufsize);
+
+    for (uint32_t i = 0; i < bufsize; i += SECTOR_SIZE, ++lba) {
+        msc_fat_view_read_sector(lba, (uint8_t *)buffer + i);
+    }
 
     return bufsize;
 }
@@ -1397,7 +1402,6 @@ tud_msc_write10_cb(uint8_t lun, uint32_t lba, uint32_t 
offset, uint8_t *buffer,
 {
     int32_t res;
     MSC_FAT_VIEW_LOG_DEBUG("SCSI WRITE10 %d, %d, %d\n", (int)lba, (int)offset, 
(int)bufsize);
-    assert(bufsize == SECTOR_SIZE);
     assert(offset == 0);
 
     last_scsi_command = SCSI_CMD_WRITE_10;
@@ -1408,17 +1412,18 @@ tud_msc_write10_cb(uint8_t lun, uint32_t lba, uint32_t 
offset, uint8_t *buffer,
         return -1;
     }
 
-    if (lba == 0) {
-        res = bufsize;
-        /* Ignore writes to boot sector */
-    } else if (lba < FAT_ROOT_DIR_FIRST_SECTOR) {
-        res = msc_fat_view_write_fat_sector(lba - FAT_FIRST_SECTOR, buffer);
-    } else if (lba < FAT_CLUSTER2_FIRST_SECTOR) {
-        res = msc_fat_view_write_root_sector(lba - FAT_ROOT_DIR_FIRST_SECTOR, 
buffer);
-    } else {
-        res = msc_fat_view_write_normal_sector(lba, buffer);
+    for (res = 0; res + SECTOR_SIZE <= bufsize; res += SECTOR_SIZE, ++lba) {
+        if (lba == 0) {
+            /* Ignore writes to boot sector */
+        } else if (lba < FAT_ROOT_DIR_FIRST_SECTOR) {
+            msc_fat_view_write_fat_sector(lba - FAT_FIRST_SECTOR, buffer + 
res);
+        } else if (lba < FAT_CLUSTER2_FIRST_SECTOR) {
+            msc_fat_view_write_root_sector(lba - FAT_ROOT_DIR_FIRST_SECTOR,
+                                           buffer + res);
+        } else {
+            msc_fat_view_write_normal_sector(lba, buffer + res);
+        }
     }
-
     return res;
 }