اصلاح ورک فلو فلش u-boot

firmware/README.md

@@ -1,10 +1,12 @@
-Place `u-boot-sunxi-with-spl.bin` in this directory before running the
-Transfer U-Boot to RAM workflow.
+Place `u-boot-sunxi-with-spl.bin` here before running the workflow.
+The existing TFTP server (`serverip`) must serve this directory as its root.
+Checkout alone does not publish files over TFTP.
 
-The existing TFTP server (`serverip` in U-Boot) must serve this directory
-as its TFTP root, so the file is available as `u-boot-sunxi-with-spl.bin`.
-Checking out this repository alone does not publish files over TFTP.
+The workflow clears stale `filesize`, requires a successful TFTP transfer,
+and checks hexadecimal `filesize` against both the transfer count and local
+file size (32 through 0x200000 bytes). It compares the first 32 RAM bytes
+with the local file, probes SPI flash, writes at offset 0, reads back to
+0x42800000 and compares the full transferred length with `cmp.b`.
 
-The workflow uses the current U-Boot network settings. It verifies the
-transferred size and the first 32 bytes against this local file. It does
-not erase or write SPI flash, save the environment, or boot the image.
+No erase, reboot or saveenv command is issued. Any failed or unverified
+command stops execution; flash writes are never automatically retried.