File content as of revision 12:3ee3062cc11c:

#include "mbedconsole.h"
#include "keyboard.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**/


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
};

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_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]);
                }
            }
        }
    }
}