From 5f581cf86d60984d13e4752bf84dd66678342988 Mon Sep 17 00:00:00 2001 From: Andre Richter Date: Mon, 16 May 2022 22:27:06 +0200 Subject: [PATCH] Update README.md --- 03_hacky_hello_world/README.md | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/03_hacky_hello_world/README.md b/03_hacky_hello_world/README.md index 71293c56..0f9e9c85 100644 --- a/03_hacky_hello_world/README.md +++ b/03_hacky_hello_world/README.md @@ -2,16 +2,17 @@ ## tl;dr -- Introducing global `print!()` macros to enable "printf debugging" at the earliest. +- Introducing global `println!()` macros to enable "printf debugging" at the earliest. - To keep tutorial length reasonable, printing functions for now "abuse" a QEMU property that lets us use the Raspberry's `UART` without setting it up properly. - Using the real hardware `UART` is enabled step-by-step in following tutorials. ## Notable additions -- `src/console.rs` introduces interface `Traits` for console commands. +- `src/console.rs` introduces interface `Traits` for console commands and a global reference to the + kernel's console through `console::console()`. - `src/bsp/raspberrypi/console.rs` implements the interface for QEMU's emulated UART. -- The panic handler makes use of the new `print!()` to display user error messages. +- The panic handler makes use of the new `println!()` to display user error messages. - There is a new Makefile target, `make test`, intended for automated testing. It boots the compiled kernel in `QEMU`, and checks for an expected output string produced by the kernel. - In this tutorial, it checks for the string `Stopping here`, which is emitted by the `panic!()`