From 8b17d1a9ca07e5b75d5d20c3926adadfebb1e9f1 Mon Sep 17 00:00:00 2001
From: shylie <shylie@shylie.info>
Date: Thu, 8 Jan 2026 13:25:28 -0500
Subject: [PATCH] Update to match firmware's expectation of name

---
 src/main.rs | 25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index 553fdaf..c66e822 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -58,12 +58,6 @@ impl Display for Error {
 }
 
 fn main() -> Result<(), Error> {
-    let args: Vec<String> = env::args().collect();
-    let img = image::open(&args[1])?;
-    let img = img.crop_imm(28, 28, img.width() - 56, img.height() - 56);
-    let img = img.resize_exact(240, 320, FilterType::Gaussian);
-    let img = img.into_rgb8();
-
     let device = list_devices().wait()?
         .find(|dev| dev.vendor_id() == 0xCAFE && dev.product_id() == 0xCA6D)
         .ok_or(Error { message: "Device not found" })?;
@@ -73,8 +67,23 @@ fn main() -> Result<(), Error> {
 
     let mut writer = interface.endpoint::<Bulk, Out>(0x01)?.writer(4096);
 
-    writer.write_all(img.as_flat_samples().samples)?;
-    writer.flush()?;
+    let args: Vec<String> = env::args().collect();
+    if args.len() == 1 {
+        writer.write(&[0x42])?;
+        writer.flush()?;
+    } else {
+        // name of card
+        writer.write(&[0])?;
+
+        let img = image::open(&args[1])?;
+        let img = img.crop_imm(28, 28, img.width() - 56, img.height() - 56);
+        let img = img.resize_exact(240, 320, FilterType::Gaussian);
+        let img = img.into_rgb8();
+
+        // image of card
+        writer.write_all(img.as_flat_samples().samples)?;
+        writer.flush()?;
+    }
 
     Ok(())
 }