From 959d50d9117a0ed3f280bf7d5bfbffd1fa1a5740 Mon Sep 17 00:00:00 2001
From: Tianhao Wang <wth@riseup.net>
Date: Mon, 5 Feb 2024 04:18:51 +0100
Subject: PS/2 Keyboard controller: read and decode key

---
 src/machine/key.rs | 51 +++++++++++++--------------------------------------
 1 file changed, 13 insertions(+), 38 deletions(-)

(limited to 'src/machine/key.rs')

diff --git a/src/machine/key.rs b/src/machine/key.rs
index 04220a6..8d4e5f9 100644
--- a/src/machine/key.rs
+++ b/src/machine/key.rs
@@ -1,17 +1,14 @@
 use bitflags::bitflags;
 use core::convert;
+use core::ffi::c_uchar;
 
+#[derive(Copy, Clone, Debug)]
 pub struct Key {
-	asc: u8,
-	scan: u8,
-	modi: Modifiers,
-	rawcode: u8, // this field not necessary, remove after testing
+	pub asc: c_uchar,
+	pub scan: u8,
+	pub modi: Modifiers,
 }
 
-// Not implementing
-// +operator char()
-//
-
 impl convert::Into<char> for Key {
 	fn into(self) -> char {
 		self.asc as char
@@ -25,6 +22,7 @@ impl convert::Into<u8> for Key {
 }
 
 bitflags! {
+	#[derive(Copy, Clone, Eq, PartialEq, Debug)]
 	pub struct Modifiers:u8 {
 		const NONE			= 0;
 		const SHIFT			= 1 << 0;
@@ -42,10 +40,9 @@ bitflags! {
 impl Key {
 	pub fn new() -> Self {
 		Self {
-			asc: 0,
-			scan: 0,
+			asc: 0,  // logically scan + modi.shift => asc
+			scan: 0, // scancode, "raw"
 			modi: Modifiers::NONE,
-			rawcode: 0,
 		}
 	}
 	pub fn decode(&mut self) {
@@ -59,14 +56,6 @@ impl Key {
 		self.scan = 0;
 	}
 
-	pub fn set_raw(&mut self, code: u8) {
-		self.rawcode = code;
-	}
-
-	pub fn get_raw(self) -> u8 {
-		self.rawcode
-	}
-
 	// setter and getter for ascii and scancode
 	pub fn set_ascii(&mut self, ascii: u8) {
 		self.asc = ascii;
@@ -98,20 +87,6 @@ impl Key {
 	}
 }
 
-use core::ffi::c_uchar;
-
-// bit masks for modifier keys
-pub enum MbitDefs {
-	Shift = 0b00000001,
-	AltLeft = 0b00000010,
-	AltRight = 0b00000100,
-	CtrlLeft = 0b00001000,
-	CtrlRight = 0b00010000,
-	CapsLock = 0b00100000,
-	NumLock = 0b01000000,
-	ScrollLock = 0b10000000,
-}
-
 // scan codes of a few specific keys
 pub enum Scan {
 	F1 = 0x3b,
@@ -126,25 +101,25 @@ pub enum Scan {
 // Decoding tables ... this shit is so ugly, thanks to rust's strong typing system!!!
 // Also, this is a german layout keyboard
 // oh btw, the code translation is done by ChatGPT if it's wrong complain to the AI!
-const NORMAL_TAB: [c_uchar; 89] = [
+pub const NORMAL_TAB: [c_uchar; 89] = [
 	0, 0, 49, 50, 51, 52, 53, 54, 55, 56, 57, 48, 225, 39, 8, 0, 113, 119, 101, 114, 116, 122, 117,
 	105, 111, 112, 129, 43, 10, 0, 97, 115, 100, 102, 103, 104, 106, 107, 108, 148, 132, 94, 0, 35,
 	121, 120, 99, 118, 98, 110, 109, 44, 46, 45, 0, 42, 0, 32, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 	0, 0, 0, 0, 45, 0, 0, 0, 43, 0, 0, 0, 0, 0, 0, 0, 60, 0, 0,
 ];
 
-const SHIFT_TAB: [c_uchar; 89] = [
+pub const SHIFT_TAB: [c_uchar; 89] = [
 	0, 0, 33, 34, 21, 36, 37, 38, 47, 40, 41, 61, 63, 96, 0, 0, 81, 87, 69, 82, 84, 90, 85, 73, 79,
 	80, 154, 42, 0, 0, 65, 83, 68, 70, 71, 72, 74, 75, 76, 153, 142, 248, 0, 39, 89, 88, 67, 86,
 	66, 78, 77, 59, 58, 95, 0, 0, 0, 32, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 	0, 0, 0, 0, 0, 0, 0, 0, 0, 62, 0, 0,
 ];
 
-const ALT_TAB: [c_uchar; 89] = [
+pub const ALT_TAB: [c_uchar; 89] = [
 	0, 0, 0, 253, 0, 0, 0, 0, 123, 91, 93, 125, 92, 0, 0, 0, 64, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 126,
 	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 230, 0, 0, 0, 0, 0, 0, 0, 0,
 	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 124, 0, 0,
 ];
 
-const ASC_NUM_TAB: [c_uchar; 13] = [55, 56, 57, 45, 52, 53, 54, 43, 49, 50, 51, 48, 44];
-const SCAN_NUM_TAB: [c_uchar; 13] = [8, 9, 10, 53, 5, 6, 7, 27, 2, 3, 4, 11, 51];
+pub const ASC_NUM_TAB: [c_uchar; 13] = [55, 56, 57, 45, 52, 53, 54, 43, 49, 50, 51, 48, 44];
+pub const SCAN_NUM_TAB: [c_uchar; 13] = [8, 9, 10, 53, 5, 6, 7, 27, 2, 3, 4, 11, 51];
-- 
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