transfer to local git!

src/keyboard.rs

@@ -0,0 +1,220 @@
+use crate::cli;
+use crate::print;
+use crate::vec::Vec;
+use crate::vga_buffer;
+use core::arch::asm;
+
+// Reading ports using asm
+#[inline(always)]
+unsafe fn inb(port: u16) -> u8 {
+    let result: u8;
+    asm!("in al, dx", out("al") result, in("dx") port, options(nomem, nostack));
+    result
+}
+
+fn get_key() -> u8 {
+    unsafe {
+        loop {
+            // Poll the keyboard controller
+            let status: u8 = inb(0x64);
+
+            if status & 0x01 == 0 {
+                continue;
+            }
+
+            // Read the input
+            return inb(0x60);
+        }
+    }
+}
+
+pub fn keyboard_loop() {
+    /*
+
+        No need to initialize the keyboard controller
+        as we did this in boot.asm
+
+    */
+
+    // Track keyboard inputs
+    let mut cmd = Vec::<char>::new();
+
+    //tracks if shift is held
+    let mut shift: bool = false;
+
+    // Wait for input
+    loop {
+        let scancode = get_key();
+
+        // check if shift is being held
+        match scancode {
+            0x2A | 0x36 => {
+                shift = true;
+            }
+            0xAA | 0xB6 => {
+                shift = false;
+            }
+            _ => {}
+        }
+
+        // Handle the input
+        let key = if shift {
+            translate_upper_alphanum(scancode)
+        } else {
+            translate_alphanum(scancode)
+        };
+
+        if key != '\0' {
+            // print char
+            print!("{}", key);
+            cmd.push(key);
+        } else {
+            // Other key press functions
+            match scancode {
+                0x4B => { // Left arrow
+
+                    //TODO
+                }
+                0x4D => { // Right arrow
+
+                    //TODO
+                }
+                0x0E => {
+                    // Backspace
+
+                    if cmd.len() > 0 {
+                        vga_buffer::TERMINAL.lock().back(1);
+                        cmd.pop();
+                    }
+                }
+                0x1C => {
+                    // Enter
+
+                    // Process command
+                    cli::process_cmd(cmd);
+
+                    cmd = Vec::<char>::new(); // Pops all elements and frees memory
+                }
+                _ => { // Ignore other keys
+                     //print!("scancode: {}", scancode);
+                }
+            };
+        }
+    }
+}
+
+fn translate_alphanum(code: u8) -> char {
+    return match code {
+        0x02 => '1',
+        0x03 => '2',
+        0x04 => '3',
+        0x05 => '4',
+        0x06 => '5',
+        0x07 => '6',
+        0x08 => '7',
+        0x09 => '8',
+        0x0A => '9',
+        0x0B => '0',
+        0x0C => '-',
+        0x0D => '=',
+        0x10 => 'q',
+        0x11 => 'w',
+        0x12 => 'e',
+        0x13 => 'r',
+        0x14 => 't',
+        0x15 => 'y',
+        0x16 => 'u',
+        0x17 => 'i',
+        0x18 => 'o',
+        0x19 => 'p',
+        0x1A => '[',
+        0x1B => ']',
+        0x1E => 'a',
+        0x1F => 's',
+        0x20 => 'd',
+        0x21 => 'f',
+        0x22 => 'g',
+        0x23 => 'h',
+        0x24 => 'j',
+        0x25 => 'k',
+        0x26 => 'l',
+        0x27 => ';',
+        0x28 => '\'', // Single quote
+        0x29 => '`',  // Grave accent
+        0x2B => '\\',
+        0x2C => 'z',
+        0x2D => 'x',
+        0x2E => 'c',
+        0x2F => 'v',
+        0x30 => 'b',
+        0x31 => 'n',
+        0x32 => 'm',
+        0x33 => ',',
+        0x34 => '.',
+        0x35 => '/', // Forward slash
+        0x37 => '*', // Numeric keypad multiplication symbol
+        0x39 => ' ', // Space bar
+        0x4A => '-', // Numeric keypad subtraction symbol
+        0x4E => '+', // Numeric keypad addition symbol
+        0x53 => '.', // Numeric keypad decimal point symbol
+        _ => '\0',   // unregistered
+    };
+}
+
+fn translate_upper_alphanum(code: u8) -> char {
+    return match code {
+        0x02 => '!',
+        0x03 => '@',
+        0x04 => '#',
+        0x05 => '$',
+        0x06 => '%',
+        0x07 => '^',
+        0x08 => '&',
+        0x09 => '*',
+        0x0A => '(',
+        0x0B => ')',
+        0x0C => '_',
+        0x0D => '+',
+        0x10 => 'Q',
+        0x11 => 'W',
+        0x12 => 'E',
+        0x13 => 'R',
+        0x14 => 'T',
+        0x15 => 'Y',
+        0x16 => 'U',
+        0x17 => 'I',
+        0x18 => 'O',
+        0x19 => 'P',
+        0x1A => '{',
+        0x1B => '}',
+        0x1E => 'A',
+        0x1F => 'S',
+        0x20 => 'D',
+        0x21 => 'F',
+        0x22 => 'G',
+        0x23 => 'H',
+        0x24 => 'J',
+        0x25 => 'K',
+        0x26 => 'L',
+        0x27 => ':',
+        0x28 => '"',
+        0x29 => '~', // Tilde
+        0x2B => '|',
+        0x2C => 'Z',
+        0x2D => 'X',
+        0x2E => 'C',
+        0x2F => 'V',
+        0x30 => 'B',
+        0x31 => 'N',
+        0x32 => 'M',
+        0x33 => '<',
+        0x34 => '>',
+        0x35 => '?', // Forward slash
+        0x37 => '*', // Numeric keypad multiplication symbol
+        0x39 => ' ', // Space bar
+        0x4A => '-', // Numeric keypad subtraction symbol
+        0x4E => '+', // Numeric keypad addition symbol
+        0x53 => '.', // Numeric keypad decimal point symbol
+        _ => '\0',   // unregistered
+    };
+}