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Mostly working. Is unstable, will emit bad codes after a while.

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This commit is contained in:
Ethan Apodaca 2016-03-02 23:34:13 -08:00
parent 3def1c3065
commit a9bce90c60
2 changed files with 56 additions and 124 deletions
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51
tmk_core/protocol/xt_interrupt.c
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@ -66,47 +66,28 @@ uint8_t xt_host_recv(void)
ISR(XT_INT_VECT)
{
static enum {
INIT,
BIT0, BIT1, BIT2, BIT3, BIT4, BIT5, BIT6, BIT7,
STOP,
} state = INIT;
static uint8_t state = 0;
static uint8_t data = 0;
// wait for clock falling edge
if(state != INIT)
wait_clock_lo(70);
switch (state) {
case INIT:
if (data_in())
state++;
break;
case BIT0:
case BIT1:
case BIT2:
case BIT3:
case BIT4:
case BIT5:
case BIT6:
case BIT7:
if (state == 0) {
if (data_in())
state++;
data >>= 1;
if (data_in()) {
data |= 0x80;
}
break;
case STOP:
if (!data_in())
goto DONE;
pbuf_enqueue(data);
goto DONE;
break;
default:
goto DONE;
} else if (state >= 1 && state <= 8) {
wait_clock_lo(20);
data >>= 1;
if (data_in())
data |= 0x80;
if (state == 8)
goto END;
state++;
} else {
goto DONE;
}
goto RETURN;
END:
pbuf_enqueue(data);
DONE:
state = INIT;
state = 0;
data = 0;
RETURN:
return;