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#include "circularbuffer.hpp"
#include "idt.hpp"
#include "keyboard.hpp"
#include "portio.hpp"
#include "vgaterminal.hpp"
#include <array>
#include <cstdint>
extern TextOutput& term;
static CircularBuffer<char> keyboardBuffer;
static const std::array<char, 0x59> ScanCodeSet1 {{
0, K_ESCAPE,
'1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
'-', '=', '\b', '\t',
'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '[', ']', '\n', K_CONTROL_L,
'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ';', '\'', '`', K_SHIFT_L, '\\',
'Z', 'X', 'C', 'V', 'B', 'N', 'M', ',', '.', '/',
K_SHIFT_R, '*', K_ALT_L, ' ', K_CAPS,
K_F1, K_F2, K_F3, K_F4, K_F5, K_F6, K_F7, K_F8, K_F9, K_F10,
K_NUM, K_SCROLL, '7', '8', '9', '-', '4', '5', '6', '+', '1', '2', '3', '0', '.',
0, 0, 0, // non-existant
K_F11, K_F12
}};
static constexpr bool isReleased(auto ch) {
return ch & 0x80;
}
static constexpr auto keycode(auto ch) {
return ch & 0x7F;
}
void keyboard_initialize()
{
keyboardBuffer = CircularBuffer<char>(128);
idt_register_callback(33, [](auto& regs) {
const auto kc = inb(0x60);
if (!isReleased(kc)) {
const auto ch = ScanCodeSet1[keycode(kc)];
//if (ch > 0)
// term.write(ch);
keyboardBuffer.push_back(ch);
}
});
}
std::optional<char> keyboard_read()
{
if (keyboardBuffer.empty()) {
return {};
} else {
const auto ch = keyboardBuffer.front();
keyboardBuffer.pop_front();
return ch;
}
}
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