Merge branch 'rofrol-patch-1'

Bumped micro-rust dependency to 0.8

src/display/02.02.DELAY.md

@@ -3,7 +3,7 @@
 > Create a time delay.
 
 Another piece of information you will need is how to create a time delay before moving to the next row.
-we want the time spent switching LED lines on and off to be much shorter than the time spent waiting with LEDs on.
+We want the time spent switching LED lines on and off to be much shorter than the time spent waiting with LEDs on.
 
 ### For loop
 

src/getting-started/01.00.BUILD.md

@@ -136,7 +136,7 @@ executing the binary usually has the operating system start by executing the C r
 This in turn invokes the Rust runtime, as marked by the `start` language item,
 which in turn invokes the main function.
 
-Having enabled `no_std`, as we are targeting on a microcontroller,
+Having enabled `no_std`, as we are targeting a microcontroller,
 neither the crt0 nor the rust runtime are available,
 so even implementing `start` would not help us.
 We need to replace the operating system entry point.
@@ -149,6 +149,8 @@ Note, you would also need to disable [name mangling][nm]:
 #![no_std]
 #![no_main]
 
+extern crate panic_halt;
+
 #[no_mangle]
 pub extern "C" fn _start() -> ! {
     loop {}

src/getting-started/02.00.FLASH.md

@@ -2,7 +2,7 @@
 
 Flashing is the process of moving our program into the microcontroller's (persistent) memory. Once flashed, the microcontroller will execute the flashed program every time it is powered on.
 
-In this case, our `rustled` program will be the only program in the microcontroller memory. By this I mean that there's nothing else running on the microcontroller: no OS, no daemon, nothing. `rustled` has full control over the device. This is what is meant by *bare-metal* programming.
+In this case, our `microrust-start` program will be the only program in the microcontroller memory. By this I mean that there's nothing else running on the microcontroller: no OS, no daemon, nothing. `microrust-start` has full control over the device. This is what is meant by *bare-metal* programming.
 
 <dl>
   <dt>OS</dt>
@@ -71,8 +71,9 @@ available.
 I mentioned that OpenOCD provides a GDB server so let's connect to that right now:
 
 ``` console
-$ arm-none-eabi-gdb -q target/thumbv6m-none-eabi/debug/rustled
-Reading symbols from target/thumbv6m-none-eabi/debug/rustled...done.
+# On Ubuntu use `gdb-mutliarch -q target/thumbv6m-none-eabi/debug//microrust-start`
+$ arm-none-eabi-gdb -q target/thumbv6m-none-eabi/debug/microrust-start
+Reading symbols from target/thumbv6m-none-eabi/debug/microrust-start...done.
 (gdb)
 ```
 
@@ -157,9 +158,9 @@ set print asm-demangle on
 # Load your program, breaks at entry
 load
 # (optional) Add breakpoint at function
-break rustled::main
+break main
 # Continue with execution
 continue
 ```
 
-Now we can learn how to debug code on the micro:bit.
+Now we can learn how to debug code on the micro:bit.

src/getting-started/03.00.DEBUG.md

@@ -6,7 +6,7 @@ Before we start, let's add some code to debug:
 
 ``` rust
 // -- snip --
-entry!(main);
+#[entry]
 fn main() -> ! {
     let _y;
     let x = 42;
@@ -28,14 +28,14 @@ At this time, we are not interested in that "pre-main" part so let's skip right
 the `main` function. We'll do that using a breakpoint:
 
 ```
-(gdb) break rustled::main
+(gdb) break main
 Breakpoint 1 at 0x8000218: file src/main.rs, line 8.
 
 (gdb) continue
 Continuing.
 Note: automatically using hardware breakpoints for read-only addresses.
 
-Breakpoint 1, rustled::main () at src/rustled/src/main.rs:13
+Breakpoint 1, main () at src/microrust-start/src/main.rs:13
 13          let x = 42;
 ```
 
@@ -87,15 +87,15 @@ $1 = 42
 $2 = (i32 *) 0x10001fdc
 
 (gdb) print _y
-$3 = 134219052
+$3 = -1
 
 (gdb) print &_y
 $4 = (i32 *) 0x10001fd8
 ```
 
 As expected, `x` contains the value `42`.
-`_y` however, contains the value `134219052` (?).
-Because `_y` has not been initialized yet, it contains some garbage value.
+`_y` however, contains the value `-1` (?).
+Because `_y` has not been initialized yet, it contains `-1`.
 
 The command `print &x` prints the address of the variable `x`.
 The interesting bit here is that GDB output shows the type of the reference:
@@ -108,7 +108,7 @@ Instead of printing the local variables one by one, you can also use the `info l
 ```
 (gdb) info locals
 x = 42
-_y = 134219052
+_y = -1
 ```
 
 OK. With another `step`, we'll be on top of the `loop {}` statement:

src/hello-world/00.00.README.md

@@ -2,5 +2,5 @@
 
 In this chapter, we will discuss the basic I/O of embedded development in rust.
 
-After this chapter,you should have all the neccesary basic knowledge to do embedded development in Rust,
+After this chapter, you should have all the neccesary basic knowledge to do embedded development in Rust,
 with anything remaining being solution specific.

src/setup/LINUX.md

@@ -9,7 +9,7 @@ Here are the installation commands for a few Linux distributions.
 ``` shell
 $ sudo apt-get install \
   gcc-arm-none-eabi \
-  gdb-arm-none-eabi \
+  gdb-multiarch \
   minicom \
   openocd
 ```

src/setup/VERIFY.md

@@ -18,7 +18,7 @@ Bus 002 Device 033: ID 0d28:0204 NXP ARM mbed
 ```
 
 In my case, the micro:bit got connected to the bus #2 and got enumerated as the device #33.
-This means the file `/dev/bus/usb/002/033` *is* the Fmicro:bit3.
+This means the file `/dev/bus/usb/002/033` is the micro:bit.
 Let's check its permissions:
 
 ``` shell