move to cargo-generate; start with QEMU

examples/hello.rs

@@ -6,13 +6,12 @@
 #![no_std]
 
 #[macro_use]
-extern crate cortex_m_rt as rt;
+extern crate cortex_m_rt;
 extern crate cortex_m_semihosting as sh;
 extern crate panic_semihosting;
 
 use core::fmt::Write;
 
-use rt::ExceptionFrame;
 use sh::hio;
 
 entry!(main);
@@ -23,15 +22,3 @@ fn main() -> ! {
 
     loop {}
 }
-
-exception!(HardFault, hard_fault);
-
-fn hard_fault(ef: &ExceptionFrame) -> ! {
-    panic!("HardFault at {:#?}", ef);
-}
-
-exception!(*, default_handler);
-
-fn default_handler(irqn: i16) {
-    panic!("Unhandled exception (IRQn = {})", irqn);
-}