}
break;
}
} else {
is_up = 0; // Two 0xF0 in a row not allowed
switch (sc)
{
case 0x12 : // Left SHIFT
shift = 0;
break;
case 0x59 : // Right SHIFT
shift = 0;
break;
case 0x05 : // F1
if(mode == 1)
mode = 2;
if(mode == 3)
mode = 0;
break;
case 0x06 : // F2
// clr();
break;
}
}
}
void put_kbbuff(unsigned char c)
{
if (buffcnt<BUFF_SIZE) // If buffer not full
{
*inpt = c; // Put character into buffer
inpt++; // Increment pointer
buffcnt++;
if (inpt >= kb_buffer + BUFF_SIZE) // Pointer wrapping
inpt = kb_buffer;
}
}
int getchar_kb(void)
{
int byte;
while(buffcnt == 0); // Wait for data
byte = *outpt; // Get byte
outpt++; // Increment pointer
if (outpt >= kb_buffer + BUFF_SIZE) // Pointer wrapping
outpt = kb_buffer;
buffcnt--; // Decrement buffer count
return byte;
}
void print_hexbyte(unsigned char i)
{
unsigned char h, l;
h = i & 0xF0; // High nibble
h = h>>4;
h = h + '0';
if (h > '9')
h = h + 7;
l = (i & 0x0F)+'0'; // Low nibble
if (l > '9')
l = l + 7;
put_kbbuff(h);
put_kbbuff(l);
}
kb.h// Keyboard communication routines
#ifndef __KB_INCLUDED
#define __KB_INCLUDED
#include <90s4434.h>
#define CLOCK 2
#define DATAPIN 3
#define ISC00 0
#define ISC01 1
void InitKeyBoard(void);
interrupt [EXT_INT0] void INT0_interrupt(void);
void decode(unsigned char sc);
void put_kbbuff(unsigned char c);
int getchar_kb(void);
void print_hexbyte(unsigned char i);
#endif
scannodes.h
// Unshifted characters
flash unsigned char unshifted[68][2] = {
0x0d,9,
0x0e,'|',
0x15,'q',
0x16,'1',
0x1a,'z',
0x1b,'s',
0x1c,'a',
0x1d,'w',
0x1e,'2',
0x21,'c',
0x22,'x',
0x23,'d',
0x24,'e',
0x25,'4',
0x26,'3',
0x29,' ',
0x2a,'v',
0x2b,'f',
0x2c,'t',
0x2d,'r',
0x2e,'5',
0x31,'n',
0x32,'b',
0x33,'h',
0x34,'g',
0x35,'y',
0x36,'6',
0x39,',',
0x3a,'m',
0x3b,'j',
0x3c,'u',
0x3d,'7',
0x3e,'8',
0x41,',',
0x42,'k',
0x43,'i',
0x44,'o',
0x45,'0',
0x46,'9',
0x49,'.',
0x4a,'-',
0x4b,'l',
0x4c,'?,
0x4d,'p',
0x4e,'+',
0x52,'?,
0x54,'?,
0x55,'\\',
0x5a,13,
0x5b,'?,
0x5d,'\\',
0x61,'<',
0x66,8,
0x69,'1',
0x6b,'4',
0x6c,'7',
0x70,'0',
0x71,',',
0x72,'2',
0x73,'5',
0x74,'6',
0x75,'8',
0x79,'+',
0x7a,'3',
0x7b,'-',
0x7c,'*',
0x7d,'9',
0,0
};
// Shifted characters
flash unsigned char shifted[68][2] = {
0x0d,9,
0x0e,'?,
0x15,'Q',
0x16,'!',
0x1a,'Z',
0x1b,'S',
0x1c,'A',
0x1d,'W',
0x1e,'"',
0x21,'C',
0x22,'X',
0x23,'D',
