Update dfu-libusb to version 0.2.1

this closes #4

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "cargo-dfu"
 authors = ["Roman Kretschmer <roman@kretschmer.email>"]
-version = "0.1.0"
+version = "0.1.1"
 edition = "2021"
 description = "cargo extension for flashing embedded rust programs via dfu"
 license = "MIT"
@@ -18,8 +18,8 @@ goblin = "0.2.3"
 colored = "2.0.0"
 rusb = "0.9.0"
 pretty_env_logger = "0.3.0"
-cargo-project = "0.2.4"
+cargo-project = "0.2.7"
 clap = {version = "3.0.10", features=["derive"]}
 maplit = "1.0.2"
 log = "0.4.6"
-dfu-libusb = "0.2.0"
+dfu-libusb = "0.2.1"

src/utils.rs

@@ -64,17 +64,7 @@ pub fn flash_bin(binary: &[u8], d: &rusb::Device<GlobalContext>) -> Result<(), U
     )
     .map_err(|e| UtilError::Dfu(e))?;
 
-    std::fs::write("target/out.bin", binary).map_err(|e| UtilError::File(e))?;
-    dfu.download(
-        &mut std::fs::OpenOptions::new()
-            .read(true)
-            .open("target/out.bin")
-            .map_err(|e| UtilError::File(e))?,
-        std::fs::metadata("target/out.bin")
-            .map_err(|e| UtilError::File(e))?
-            .len() as u32,
-    )
-    .unwrap();
+    dfu.download_from_slice(binary).unwrap();
     Ok(())
 }