drashna/qmk_firmware
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Add LED feature to Sun converter

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This commit is contained in:
tmk 2012-10-21 22:12:36 +09:00
parent 454f7bc716
commit edce1d19a6
5 changed files with 74 additions and 18 deletions
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57
protocol/serial_soft.c
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@ -51,9 +51,10 @@ POSSIBILITY OF SUCH DAMAGE.
void serial_init(void)
{
SERIAL_RXD_INIT();
SERIAL_TXD_INIT();
}
// RX ring buffer
/* RX ring buffer */
#define RBUF_SIZE 8
static uint8_t rbuf[RBUF_SIZE];
static uint8_t rbuf_head = 0;
@ -71,39 +72,63 @@ uint8_t serial_recv(void)
return data;
}
//ISR(INT2_vect)
void serial_send(uint8_t data)
{
/* signal state: IDLE: ON, START: OFF, STOP: ON, DATA0: OFF, DATA1: ON */
/* start bit */
SERIAL_TXD_OFF();
_delay_us(WAIT_US);
#ifdef SERIAL_BIT_ORDER_MSB
uint8_t mask = 0x80;
#else
uint8_t mask = 0x01;
#endif
while (mask) {
if (data&mask) { SERIAL_TXD_ON(); } else { SERIAL_TXD_OFF(); }
_delay_us(WAIT_US);
#ifdef SERIAL_BIT_ORDER_MSB
mask >>= 1;
#else
mask <<= 1;
#endif
}
/* stop bit */
SERIAL_TXD_ON();
_delay_us(WAIT_US);
}
/* detect edge of start bit */
ISR(SERIAL_RXD_VECT)
{
SERIAL_RXD_INT_ENTER()
uint8_t data = 0;
#ifdef SERIAL_BIT_ORDER_MSB
uint8_t pos = 0x80;
uint8_t mask = 0x80;
#else
uint8_t pos = 0x01;
uint8_t mask = 0x01;
#endif
// to center of start bit
/* to center of start bit */
_delay_us(WAIT_US/2);
do {
// to center of next bit
/* to center of next bit */
_delay_us(WAIT_US);
if (SERIAL_RXD_PIN&(1<<SERIAL_RXD_BIT)) {
data |= pos;
if (SERIAL_RXD_READ()) {
data |= mask;
}
#ifdef SERIAL_BIT_ORDER_MSB
pos >>= 1;
mask >>= 1;
#else
pos <<= 1;
mask <<= 1;
#endif
} while (pos);
// to center of stop bit
} while (mask);
/* to center of stop bit */
_delay_us(WAIT_US);
#ifdef SERIAL_NEGATIVE_LOGIC
data = ~data;
#endif
uint8_t next = (rbuf_head + 1) % RBUF_SIZE;
if (next != rbuf_tail) {
rbuf[rbuf_head] = data;