diff options
| author | tmk <nobody@nowhere> | 2013-02-22 19:38:06 +0900 |
|---|---|---|
| committer | tmk <nobody@nowhere> | 2013-02-22 19:38:06 +0900 |
| commit | 4ec8fd28230753452df7bc4111b60dc104f30267 (patch) | |
| tree | 1098762b678f0ee74fe07e08b35807841b8a3257 /protocol | |
| parent | 4a91d182776a956c5442debbaf7a8af047d429c0 (diff) | |
Fix softwere serial
Diffstat (limited to 'protocol')
| -rw-r--r-- | protocol/serial.h | 1 | ||||
| -rw-r--r-- | protocol/serial_soft.c | 44 |
2 files changed, 18 insertions, 27 deletions
diff --git a/protocol/serial.h b/protocol/serial.h index bd071bec92..96913c8675 100644 --- a/protocol/serial.h +++ b/protocol/serial.h @@ -41,6 +41,7 @@ POSSIBILITY OF SUCH DAMAGE. /* host role */ void serial_init(void); uint8_t serial_recv(void); +int16_t serial_recv2(void); void serial_send(uint8_t data); #endif diff --git a/protocol/serial_soft.c b/protocol/serial_soft.c index 47b1e4571d..af5110b4f6 100644 --- a/protocol/serial_soft.c +++ b/protocol/serial_soft.c @@ -48,23 +48,6 @@ POSSIBILITY OF SUCH DAMAGE. #define WAIT_US (1000000/SERIAL_BAUD) -#if 1 -#define WAIT_TICK (1000000/SERIAL_BAUD) -#define WAIT4(tick) _delay_us(tick) -#else -#define WAIT_TICK ((16000000/SERIAL_BAUD)/4 - 5) -static inline void WAIT4(uint8_t tick) -{ - __asm__ __volatile__ ( - "1: dec %0" "\n\t" - "nop" "\n\t" - "brne 1b" - : - : "r" (tick) - ); -} -#endif - void serial_init(void) { SERIAL_RXD_INIT(); @@ -90,6 +73,18 @@ uint8_t serial_recv(void) return data; } +int16_t serial_recv2(void) +{ + uint8_t data = 0; + if (rbuf_head == rbuf_tail) { + return -1; + } + + data = rbuf[rbuf_tail]; + rbuf_tail = (rbuf_tail + 1) % RBUF_SIZE; + return data; +} + void serial_send(uint8_t data) { /* signal state: IDLE: ON, START: OFF, STOP: ON, DATA0: OFF, DATA1: ON */ @@ -139,13 +134,11 @@ PORTD ^= 1<<7; #endif /* to center of start bit */ - //_delay_us(WAIT_US/2); - WAIT4(WAIT_TICK/2); + _delay_us(WAIT_US/2); PORTD ^= 1<<7; do { /* to center of next bit */ - //_delay_us(WAIT_US); - WAIT4(WAIT_TICK); + _delay_us(WAIT_US); PORTD ^= 1<<7; if (SERIAL_RXD_READ()) { @@ -160,18 +153,15 @@ PORTD ^= 1<<7; } while (mask); /* to center of parity bit */ - //_delay_us(WAIT_US); - WAIT4(WAIT_TICK); + _delay_us(WAIT_US); if (SERIAL_RXD_READ()) { parity ^= 1; } PORTD ^= 1<<7; /* to center of stop bit */ - //_delay_us(WAIT_US); - WAIT4(WAIT_TICK); + _delay_us(WAIT_US); uint8_t next = (rbuf_head + 1) % RBUF_SIZE; - //if (parity && next != rbuf_tail) { - if (next != rbuf_tail) { + if (parity && next != rbuf_tail) { rbuf[rbuf_head] = data; rbuf_head = next; } |