Prizm Getkey

I've been working a making a getkey library that is OS independent for my contest entry and this is what I have so far. Currently it supports reading the key matrix then converting it into a short length identifier. Multi key support is not added yet but is coming soon. Here is the library along with an example program. To use just send a 12 byte array pointer to CustomKey() which will fill the array with the key buffer. Then use BufferConvert() to convert the buffer into a usable identifier. The key identifiers can be found in the #define section of CustomKey.h. Standby for full documentation

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#define KEY_EXE 0x0004
#define KEY_RETURN 0x0004
#define KEY_NEGATIVE 0x0008
#define KEY_ANS 0x0008
#define KEY_EXP 0x0010
#define KEY_PI 0x0010
#define KEY_QUOTE 0x0010
#define KEY_POINT 0x0020
#define KEY_EQUAL 0x0020
#define KEY_SPACE 0x0020
#define KEY_NUM_ZERO 0x0040
#define KEY_IMAGINARY 0x0040
#define KEY_ALPHA_Z 0x0040
#define KEY_AC_ON 0x0101
#define KEY_OFF 0x0101
#define KEY_DIV 0x0204
#define KEY_CURLY_RIGHT 0x0204
#define KEY_ALPHA_T 0x0204
#define KEY_MULT 0x0208
#define KEY_CURLY_LEFT 0x0208
#define KEY_ALPHA_S 0x0208
#define KEY_NUM_SIX 0x0210
#define KEY_ALPHA_R 0x0210
#define KEY_NUM_FIVE 0x0220
#define KEY_FORMAT 0x0220
#define KEY_ALPHA_Q 0x0220
#define KEY_NUM_FOUR 0x0240
#define KEY_CATALOG 0x0240
#define KEY_ALPHA_P 0x0240
#define KEY_MINUS 0x0304
#define KEY_BRACKET_RIGHT 0x0304
#define KEY_ALPHA_Y 0x0304
#define KEY_PLUS 0x0308
#define KEY_BRACKET_LEFT 0x0308
#define KEY_ALPHA_X 0x0308
#define KEY_NUM_THREE 0x0310
#define KEY_ALPHA_W 0x0310
#define KEY_NUM_TWO 0x0320
#define KEY_MAT 0x0320
#define KEY_ALPHA_V 0x0320
#define KEY_NUM_ONE 0x0340
#define KEY_LIST 0x0340
#define KEY_ALPHA_U 0x0340
#define KEY_ARROW 0x0402
#define KEY_SWAP 0x0402
#define KEY_ALPHA_L 0x0402
#define KEY_COMMA 0x0404
#define KEY_MOVE 0x0404
#define KEY_ALPHA_K 0x0404
#define KEY_PARA_RIGHT 0x0408
#define KEY_RECIPROCAL 0x0408
#define KEY_ALPHA_J 0x0408
#define KEY_PARA_LEFT 0x0410
#define KEY_CUBIC_ROOT 0x0410
#define KEY_ALPHA_I 0x0410
#define KEY_FRAC_DEC 0x0420
#define KEY_MIXED_IMPROPER 0x0420
#define KEY_ALPHA_H 0x0420
#define KEY_FRAC 0x0440
#define KEY_MIXED 0x0440
#define KEY_ALPHA_G 0x0440
#define KEY_DEL 0x0508
#define KEY_INS 0x0508
#define KEY_UNDO 0x0508
#define KEY_NUM_NINE 0x0510
#define KEY_PASTE 0x0510
#define KEY_ALPHA_O 0x0510
#define KEY_NUM_EIGHT 0x0520
#define KEY_CLIP 0x0520
#define KEY_ALPHA_N 0x0520
#define KEY_NUM_SEVEN 0x0540
#define KEY_CAPTURE 0x0540
#define KEY_ALPHA_M 0x0540
#define KEY_RIGHT 0x0602
#define KEY_DOWN 0x0604
#define KEY_EXIT 0x0608
#define KEY_QUIT 0x0608
#define KEY_RAISE 0x0610
#define KEY_X_ROOT 0x0610
#define KEY_THETA 0x0610
#define KEY_SQUARE 0x0620
#define KEY_SQUARE_ROOT 0x0620
#define KEY_RADIAN 0x0620
#define KEY_ALPHA 0x0640
#define KEY_ALPHA_LOCK 0x0640
#define KEY_TAN 0x0702
#define KEY_REVERSE_TAN 0x0702
#define KEY_ALPHA_F 0x0702
#define KEY_COS 0x0704
#define KEY_REVERSE_COS 0x0704
#define KEY_ALPHA_E 0x0704
#define KEY_SIN 0x0708
#define KEY_REVERSE_SIN 0x0708
#define KEY_ALPHA_D 0x0708
#define KEY_LN 0x0710
#define KEY_E_X 0x0710
#define KEY_ALPHA_C 0x0710
#define KEY_LOG 0x0720
#define KEY_TEN_X 0x0720
#define KEY_ALPHA_B 0x0720
#define KEY_X 0x0740
#define KEY_ANGLE 0x0740
#define KEY_ALPHA_A 0x0740
#define KEY_F_SIX 0x0802
#define KEY_G_T 0x0802
#define KEY_F_FIVE 0x0804
#define KEY_G_SOLVE 0x0804
#define KEY_F_FOUR 0x0808
#define KEY_SKETCH 0x0808
#define KEY_F_THREE 0x0810
#define KEY_V_WINDOW 0x0810
#define KEY_F_TWO 0x0820
#define KEY_ZOOM 0x0820
#define KEY_F_ONE 0x0840
#define KEY_TRACE 0x0840
#define KEY_UP 0x0902
#define KEY_LEFT 0x0904
#define KEY_MENU 0x0908
#define KEY_SETUP 0x0908
#define KEY_VARS 0x0910
#define KEY_PRGM 0x0910
#define KEY_OPTN 0x0920
#define KEY_SHIFT 0x0940



void CustomKey( char * buffer);
short BufferConvert( char * buffer);

void CustomKey( char * buffer)
{
 const char * keyaddress = 0xa44b0000;
 
 for (int index = 0; index < 12; index++)
 {
  buffer[index] = keyaddress[index];
 }
}

short BufferConvert( char * buffer)
{
 short KeyResult;
 for(short index = 0; index < 12; index++)
 {
  if(buffer[index] != 0)
   KeyResult = (index << 8) | ((short) buffer[index]);
 }
 return KeyResult;
}

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#include <display.h>
#include <SYSTEM_syscalls.h>
#include <CustomKey.h>
#include <keyboard.h>

//
void main(void) {
 int x = 1;
 int y = 1;
 int color = 0;
 int mode = 0;
 char keybuffer[12];
 short key;
 int iContinue = 1;

 char* heart = "    ";
 heart[2] = 0xE5;
 heart[3] = 0xE2;
 Bdisp_AllCr_VRAM();

 while (iContinue) {
  key = 0;
  Bdisp_AllCr_VRAM();
  PrintXY(x, y, heart, mode, color);
  Bdisp_PutDisp_DD();
  while (key == 0)
  {
   CustomKey( keybuffer );
   key = BufferConvert(keybuffer);
  }
  switch (key) {
   case KEY_EXIT:
    iContinue = 0;
    break;
   case KEY_UP:
    y = y == 1 ? 8 : y-1;
    break;
   case KEY_DOWN:
    y = y == 8 ? 1 : y+1;
    break;
   case KEY_LEFT:
    x = x == 0 ? 21 : x-1;
    break;
   case KEY_RIGHT:
    x = x == 21 ? x=1 : x+1;
    break;
   case KEY_PLUS:
    color = color == 7 ? 0 : color+1;
    break;
   case KEY_MINUS:
    color = color == 0 ? 7 : color-1;
    break;
   case KEY_MULT:
    mode = !mode;
    break;
   case KEY_DIV:
    mode = !mode;
    break;
  }
 }

 return;
}