diff --git a/blinky/Cargo.toml b/blinky/Cargo.toml
index 28cefb4..3b73349 100644
--- a/blinky/Cargo.toml
+++ b/blinky/Cargo.toml
@@ -7,13 +7,17 @@ authors = ["guozhanxin <guozhanxin@rt-thread.com>"]
 
 [dependencies]
 cortex-m = "0.7"
-cortex-m-rt = "0.6.5"
+cortex-m-rt = "0.7"
 panic-halt = "0.2.0"
 panic-semihosting = "0.6.0"
 cortex-m-semihosting = "0.5.0"
-stm32l4xx-hal = { version = "0.6.0", features = ["rt", "stm32l4x2"] }
 nb = "1.0.0"
 
+[dependencies.stm32l4xx-hal]
+git = "https://github.com/stm32-rs/stm32l4xx-hal"
+tag = "v0.7.1"
+features = ["rt", "stm32l475"]
+
 [profile.dev]
 opt-level = 1
 debug = true
diff --git a/blinky/elf2bin.sh b/blinky/elf2bin.sh
new file mode 100755
index 0000000..a25b4c0
--- /dev/null
+++ b/blinky/elf2bin.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+
+project_path=$(cd `dirname $0`; pwd)
+project_name="${project_path##*/}"
+/opt/gcc-arm-none-eabi-10-2020-q4-major/bin/arm-none-eabi-objcopy target/thumbv7em-none-eabihf/release/$project_name -O binary $project_name.bin
+echo 'make' $project_name'.bin OK!'
\ No newline at end of file
diff --git a/blinky/src/main.rs b/blinky/src/main.rs
index 7e4aab4..e0e0f5f 100644
--- a/blinky/src/main.rs
+++ b/blinky/src/main.rs
@@ -2,7 +2,6 @@
 //!
 //! pe7 is used as pandora LED.
 //!
-#![deny(unsafe_code)]
 #![deny(warnings)]
 #![no_main]
 #![no_std]
@@ -34,9 +33,9 @@ fn main() -> ! {
     // TRY this alternate clock configuration (clocks run at nearly the maximum frequency)
     let clocks = rcc
         .cfgr
-        .sysclk(80.mhz())
-        .pclk1(80.mhz())
-        .pclk2(80.mhz())
+        .sysclk(80.MHz())
+        .pclk1(80.MHz())
+        .pclk2(80.MHz())
         .freeze(&mut flash.acr, &mut pwr);
 
     let mut gpioe = dp.GPIOE.split(&mut rcc.ahb2);
@@ -47,16 +46,16 @@ fn main() -> ! {
     let mut timer = Delay::new(cp.SYST, clocks);
 
     loop {
-        led.set_low().ok();
+        led.set_low();
         timer.delay_ms(1000 as u32);
 
-        led.set_high().ok();
+        led.set_high();
         timer.delay_ms(1000 as u32);
     }
 
 }
 
 #[exception]
-fn HardFault(ef: &ExceptionFrame) -> ! {
+unsafe fn HardFault(ef: &ExceptionFrame) -> ! {
     panic!("{:#?}", ef);
-}
\ No newline at end of file
+}