uint8_t matrix_scan(void)
{
static enum {
INIT,
E0,
// Pause: E1 1D 45, E1 9D C5
E1,
E1_1D,
E1_9D,
} state = INIT;
uint8_t code = xt_host_recv();
if (!code) return 0;
dprintf("%02X ", code);
switch (state) {
case INIT:
switch (code) {
case 0xE0:
state = E0;
break;
case 0xE1:
state = E1;
break;
default:
if (code < 0x80)
matrix_make(code);
else
matrix_break(code & 0x7F);
break;
}
break;
case E0:
switch (code) {
case 0x2A:
case 0xAA:
case 0x36:
case 0xB6:
//ignore fake shift
state = INIT;
break;
default:
if (code < 0x80)
matrix_make(move_e0code(code));
else
matrix_break(move_e0code(code & 0x7F));
state = INIT;
break;
}
break;
case E1:
switch (code) {
case 0x1D:
state = E1_1D;
break;
case 0x9D:
state = E1_9D;
break;
default:
state = INIT;
break;
}
break;
case E1_1D:
switch (code) {
case 0x45:
matrix_make(0x55);
break;
default:
state = INIT;
break;
}
break;
case E1_9D:
switch (code) {
case 0x45:
matrix_break(0x55);
break;
default:
state = INIT;
break;
}
break;
default:
state = INIT;
}
return 1;
}
uint8_t matrix_scan(void)
{
// scan code reading states
static enum {
INIT,
E0,
E0_2A,
E0_2A_E0,
E0_B7,
E0_B7_E0,
// print screen
E1,
E1_1D,
E1_1D_45,
E1_1D_45_E1,
E1_1D_45_E1_9D,
// pause
} state = INIT;
is_modified = false;
// 'pseudo break code' hack
if (matrix_is_on(ROW(PAUSE), COL(PAUSE))) {
matrix_break(PAUSE);
}
uint8_t code = xt_host_recv();
switch (state) {
case INIT:
switch (code) {
case 0xE0:
state = E0;
break;
case 0xE1:
state = E1;
break;
default: // normal key make
if (code < 0x80 && code != 0x00) {
xprintf("make: %X\r\n", code);
matrix_make(code);
} else if (code > 0x80 && code < 0xFF && code != 0x00) {
xprintf("break %X\r\n", code);
matrix_break(code - 0x80);
}
state = INIT;
}
break;
case E0: // E0-Prefixed
switch (code) { //move these codes to unused places on the matrix
case 0x2A:
state = E0_2A;
break;
case 0xB7:
state = E0_B7;
break;
default:
if (code < 0x80 && code != 0x00) {
matrix_make(move_codes(code));
} else if (code > 0x80 && code < 0xFF && code != 0x00) {
matrix_break(move_codes(code - 0x80));
}
state = INIT;
}
break;
case E0_2A:
if(code == 0xE0)
state = E0_2A_E0;
else
state = INIT;
break;
case E0_2A_E0:
if(code == 0x37)
matrix_make(PRINT_SCREEN);
else
state = INIT;
break;
case E0_B7:
if(code == 0xE0)
state = E0_B7;
else
state = INIT;
break;
case E0_B7_E0:
if(code == 0xAA)
matrix_break(PRINT_SCREEN);
else
state = INIT;
break;
case E1:
if (code == 0x1D)
state = E1_1D;
else
state = INIT;
break;
case E1_1D:
if(code == 0x45)
state = E1_1D_45;
else
state = INIT;
break;
case E1_1D_45:
if(code == 0xE1)
state = E1_1D_45_E1;
else
state = INIT;
break;
case E1_1D_45_E1:
if(code == 0x9D)
state = E1_1D_45_E1_9D;
else
state = INIT;
break;
case E1_1D_45_E1_9D:
if(code == 0xC5)
matrix_make(PAUSE);
else
state = INIT;
break;
default:
state = INIT;
}
return 1;
}
