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| author | tmk <nobody@nowhere> | 2013-02-22 09:53:46 +0900 |
|---|---|---|
| committer | tmk <nobody@nowhere> | 2013-02-22 09:53:46 +0900 |
| commit | f68c5bf0d30dc1300c71dabc63d2c2970f7337c9 (patch) | |
| tree | b44e062c435278d455dedd8204ef4a02b4ed08cd /protocol/serial_soft.c | |
| parent | 7a31451a077a55e1ad97cf8b31a111c7cd311a4d (diff) | |
| download | firmware-f68c5bf0d30dc1300c71dabc63d2c2970f7337c9.tar.gz firmware-f68c5bf0d30dc1300c71dabc63d2c2970f7337c9.tar.bz2 firmware-f68c5bf0d30dc1300c71dabc63d2c2970f7337c9.zip | |
Add initial files for PC98
Diffstat (limited to 'protocol/serial_soft.c')
| -rw-r--r-- | protocol/serial_soft.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/protocol/serial_soft.c b/protocol/serial_soft.c index beddc353c..e0661c3aa 100644 --- a/protocol/serial_soft.c +++ b/protocol/serial_soft.c @@ -106,11 +106,19 @@ ISR(SERIAL_RXD_VECT) SERIAL_RXD_INT_ENTER() uint8_t data = 0; + #ifdef SERIAL_BIT_ORDER_MSB uint8_t mask = 0x80; #else uint8_t mask = 0x01; #endif + +#ifdef SERIAL_PARITY_ODD + uint8_t parity = 0; +#else + uint8_t parity = 1; +#endif + /* to center of start bit */ _delay_us(WAIT_US/2); do { @@ -119,6 +127,7 @@ ISR(SERIAL_RXD_VECT) if (SERIAL_RXD_READ()) { data |= mask; + parity ^= 1; } #ifdef SERIAL_BIT_ORDER_MSB mask >>= 1; @@ -126,11 +135,18 @@ ISR(SERIAL_RXD_VECT) mask <<= 1; #endif } while (mask); + + /* to center of parity bit */ + _delay_us(WAIT_US); + parity ^= SERIAL_RXD_READ(); + /* to center of stop bit */ _delay_us(WAIT_US); + _delay_us(WAIT_US/2); + parity = 1; uint8_t next = (rbuf_head + 1) % RBUF_SIZE; - if (next != rbuf_tail) { + if (parity && next != rbuf_tail) { rbuf[rbuf_head] = data; rbuf_head = next; } |