File content as of revision 11:fede136943a9:

#include "mbedconsole.h"
/**This is basically a straight rip off of my x86 OS project AlloyOS. I just ported the keyboard driver from it cause it always treated me well**/


#define KEYBOARD_DATAPIN p11
#define KEYBOARD_CLOCKPIN p12

//how many keys the buffer can hold
#define KBD_BUFFER_SIZE 128 

//key defines
#define LSHIFT_KEY 0x12
#define RSHIFT_KEY 0x59

#define CTRL_KEY 0xF3
#define ALT_KEY 0xF4
#define CAPS_KEY 0x58
#define NUM_KEY 0x77
#define SCROLL_KEY 0xF7
//#define F_BASE_KEY 0xFF //59 is F1, 60 is F2, and so on until F10
#define HOME_KEY 0xFF
#define UP_KEY 0xFF
#define PAGE_UP_KEY 0xFF
#define LEFT_KEY 0xFF
#define RIGHT_KEY 0xFF
#define END_KEY 0xFF
#define DOWN_KEY 0xFF
#define PAGE_DOWN_KEY 0xFF
#define INSERT_KEY 0xFF
#define DEL_KEY 0xFF
#define F11_KEY 0xFF
#define F12_KEY 0xFF

#define SCROLL_LED 1
#define NUM_LED 2
#define CAPS_LED 4


const char kbdus[0x84] =
{
    0, 
    0, //1 F9
    0, //2 ?
    0, //3 f5
    0, //4 f3
    0, //5 F1
    0, //6 F2
    0, //7 F12
    0, //8 ?
    0, //9 F10
    0, //A F8
    0, //B F6
    0, //C F4
    '\t',
    '`',
    0, //F ?
    0, //10 ?
    0, //11 L alt
    0, //L shift
    0, //13 ?
    0, //14 L CTRL
    'q', '1',
    0, 0, 0, //17-19 ?
    'z', 's', 'a', 'w', '2',
    0, 0, //1F-20 ?
    'c', 'x', 'd', 'e', '4', '3',
    0, 0, //27-28 ? 
    ' ', 'v', 'f', 't', 'r', '5', 
    0, 0, //2F-30 ?
    'n', 'b', 'h', 'g', 'y', '6',
    0, 0, 0, //37-39 ?
    'm','j', 'u', '7', '8',
    0, 0, //3F-40 ?
    ',', 'k', 'i', 'o', '0', '9',
    0, 0, //47-48 ?
    '.', '/', 'l', ';', 'p', '-',
    0, 0, 0, //4f-51 ?
    '\'',
    0, //53 ?
    '[', '=', 
    0, 0, //56-57 ?
    0, //58 caplock
    0, //59 R shift
    '\n', //5A enter
    ']', 
    0, //5C ?
    '\\',
    0, 0, 0, 0, 0, 0, 0, 0, //5E-65 ?
    '\b', //backspace
    0, 0, //67-68
    0, //69 End 1
    0, //6a ?
    '4', //6b left 4
    0, //6c home 7
    0, 0, 0, //6d-6f ?
    '0', //70 ins 0
    0, //71 del .
    '2', //72 down 2
    '5', //73 5
    '6', //74 right 6
    '8', //75 up 8
    27, //76 esc
    0, //77 numlock
    0, //78 f11
    '+', //79 +
    '3', //7A pagedown 3
    '-', //7B
    '*', //7C
    '9', //7D pageup 9
    '0', //7E scroll lock
    0, 0, 0, 0, //7F-82 ?
    0, //83 F7
};


const char kbdus_caps[0x84] =
{
    0, 
    0, //1 F9
    0, //2 ?
    0, //3 f5
    0, //4 f3
    0, //5 F1
    0, //6 F2
    0, //7 F12
    0, //8 ?
    0, //9 F10
    0, //A F8
    0, //B F6
    0, //C F4
    '\t',
    '~',
    0, //F ?
    0, //10 ?
    0, //11 L alt
    0, //L shift
    0, //13 ?
    0, //14 L CTRL
    'Q', '!',
    0, 0, 0, //17-19 ?
    'Z', 'S', 'A', 'W', '@',
    0, 0, //1F-20 ?
    'C', 'X', 'D', 'E', '#', '$',
    0, 0, //27-28 ? 
    ' ', 'V', 'F', 'T', 'R', '%', 
    0, 0, //2F-30 ?
    'N', 'B', 'H', 'G', 'Y', '^',
    0, 0, 0, //37-39 ?
    'M','J', 'U', '&', '*',
    0, 0, //3F-40 ?
    '<', 'K', 'I', 'O', ')', '(',
    0, 0, //47-48 ?
    '>', '?', 'L', ':', 'P', '_',
    0, 0, 0, //4f-51 ?
    '\"',
    0, //53 ?
    '{', '+', 
    0, 0, //56-57 ?
    0, //58 caplock
    0, //59 R shift
    '\n', //5A enter
    '}', 
    0, //5C ?
    '|',
    0, 0, 0, 0, 0, 0, 0, 0, //5E-65 ?
    '\b', //backspace
    0, 0, //67-68
    0, //69 End 1
    0, //6a ?
    '4', //6b left 4
    0, //6c home 7
    0, 0, 0, //6d-6f ?
    '0', //70 ins 0
    0, //71 del .
    '2', //72 down 2
    '5', //73 5
    '6', //74 right 6
    '8', //75 up 8
    27, //76 esc
    0, //77 numlock
    0, //78 f11
    '+', //79 +
    '3', //7A pagedown 3
    '-', //7B
    '*', //7C
    '9', //7D pageup 9
    '0', //7E scroll lock
    0, 0, 0, 0, //7F-82 ?
    0, //83 F7
};


typedef struct {
    unsigned char caps;
    unsigned char shift;
    unsigned char scroll;
    unsigned char num;
    unsigned char ctrl;
    unsigned char alt;
}
shift_locks; /*for simplicity and speed*/

extern volatile shift_locks kbd_shifts;


typedef struct {
    uint16_t scancode;
    uint8_t asci;
}kbd_key;


PS2KB_INIT *ps2_kb_init;
PS2KB *ps2_kb;

volatile kbd_key *keys;
volatile uint8_t current_key=0;
volatile uint8_t key_got=0;
volatile char pending_key=0;
volatile uint8_t led_status=0;

void keyboard_callback(PS2KB kb, uint8_t val);

void keyboard_init()
{
    keys=(kbd_key*)malloc(256*sizeof(kbd_key));
    kbd_shifts.shift=0;
    kbd_shifts.caps=0;
    kbd_shifts.num=0;
    kbd_shifts.scroll=0;
    kbd_shifts.ctrl=0;
    kbd_shifts.alt=0;
    ps2_kb_init=new PS2KB_INIT(KEYBOARD_CLOCKPIN, KEYBOARD_DATAPIN);
    ps2_kb=new PS2KB(KEYBOARD_CLOCKPIN, KEYBOARD_DATAPIN, (KeyboardCallback) &keyboard_callback);
}



volatile shift_locks kbd_shifts;



/**The way the keyboard driver works is this:
the buffer is 256 elements big. key_got and current_key are both
bytes. Rather than setting current_key to 0, the entire buffer is constantly
in use. when a key is pushed, current key is incremented. when a key is got(with safety checks)
key_got is incremented. Also, when it reaches the end of the buffer, it simply wraps around
to the beginning due to byte overflow. The worst that can happen is if 256 bytes get
built up, in which case everything will be screwed up.. I should eventually controlt he capture
of these keys to where not all of them are stored, and they are only stored when needed**/

int kbd_PutBuffer(uint16_t scan,uint8_t asci){
    keys[current_key].scancode=scan;
    keys[current_key].asci=asci;
    current_key++;
    pending_key++;;
    return 0;
}

kbd_key kbd_PopBuffer(){
    kbd_key k;
    while(pending_key==0){
        //hlt();
    //fill in busy code here    
    }
    
    k.scancode=keys[key_got].scancode;
    k.asci=keys[key_got].asci;
    pending_key--;
    key_got++;
    return k;
}

uint8_t kbd_GetKey(){ //this will just return the asci code
    kbd_key k;
    k.asci=0;
    while(k.asci==0){
        k=kbd_PopBuffer();
    }
    return k.asci;
}


void kbd_update_leds(uint8_t status){
    uint8_t tmp;
    //TODO
    /*while((inportb(0x64)&2)!=0){}
    outportb(0x60,0xED);
    
    while((inportb(0x64)&2)!=0){}
    outportb(0x60,status);
    */
}


 
int kbd_DoShifts(uint8_t scan){
    switch(scan){
        case RSHIFT_KEY:
            kbd_shifts.shift++;
            break;
        case LSHIFT_KEY:
            kbd_shifts.shift++;
            break;
        case CTRL_KEY:
            kbd_shifts.ctrl++;
            break;
        case ALT_KEY:
            kbd_shifts.alt++;
            break;
        case CAPS_KEY:
            led_status^=CAPS_LED;
            kbd_update_leds(led_status);
            kbd_shifts.caps^=1;
            break;
        case NUM_KEY:
            led_status^=NUM_LED;
            kbd_update_leds(led_status);
            kbd_shifts.num^=1;
            break;
        case SCROLL_KEY:
            led_status^=SCROLL_LED;
            kbd_update_leds(led_status);
            kbd_shifts.scroll^=1;
            break;
        default:
            return 0;
            break;
    }
    return 1;
}

int kbd_DoUnshifts(uint8_t scan){
    switch(scan){
        case RSHIFT_KEY:
            kbd_shifts.shift--;
            break;
        case LSHIFT_KEY:
            kbd_shifts.shift--;
            break;
        case CTRL_KEY:
            kbd_shifts.ctrl--;
            break;
        case ALT_KEY:
            kbd_shifts.alt--;
            break;
        case CAPS_KEY:
            //kbd_shifts.caps=0;
            break;
        case NUM_KEY:
            //kbd_shifts.num=0;
            break;
        case SCROLL_KEY:
            //kbd_shifts.scroll=0;
            break;
        default:
            return 0;
            break;
    }
    return 1;
}
volatile bool expecting_break=false;
void keyboard_callback(PS2KB kb, uint8_t val) //this is called from interrupt! Must be fast
{
        //stopints();
    if(expecting_break){
        //val^=0xF0;
        kbd_DoUnshifts(val);
        expecting_break=false;
    }else{
        if(val>=0xF0){     
            expecting_break=true;
        }else{
            //add check for 0x84 to make sure we don't go over our keymap
            if(val<=0x84 && kbd_DoShifts(val)==0){ //if not a shift-type key
                
                if ((kbd_shifts.caps^kbd_shifts.shift)==1) {
                    kbd_PutBuffer(val,kbdus_caps[val]);
                }else{
                    kbd_PutBuffer(val,kbdus[val]);
                }
            }
        }
    }
}