diff options
| -rw-r--r-- | converter/pc98_usb/config.h | 9 | ||||
| -rw-r--r-- | converter/pc98_usb/matrix.c | 6 | ||||
| -rw-r--r-- | protocol/serial_soft.c | 42 |
3 files changed, 46 insertions, 11 deletions
diff --git a/converter/pc98_usb/config.h b/converter/pc98_usb/config.h index 8bcaa26db9..6f9f8fc3cf 100644 --- a/converter/pc98_usb/config.h +++ b/converter/pc98_usb/config.h @@ -55,7 +55,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. */ #define SERIAL_BAUD 19200 #define SERIAL_PARITY_ODD -#define SERIAL_BIT_ORDER_MSB +#define SERIAL_BIT_ORDER_LSB #define SERIAL_RXD_DDR DDRD #define SERIAL_RXD_PORT PORTD @@ -67,7 +67,9 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. SERIAL_RXD_DDR &= ~(1<<SERIAL_RXD_BIT); \ SERIAL_RXD_PORT |= (1<<SERIAL_RXD_BIT); \ /* enable interrupt: INT2(rising edge) */ \ - EICRA |= ((1<<ISC21)|(1<<ISC20)); \ + /*EICRA |= ((1<<ISC21)|(1<<ISC20));*/ \ + /* enable interrupt: INT2(falling edge) */ \ + EICRA |= ((1<<ISC21)|(0<<ISC20)); \ EIMSK |= (1<<INT2); \ } while (0) #define SERIAL_RXD_INT_ENTER() @@ -75,7 +77,8 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. /* clear interrupt flag */ \ EIFR = (1<<INTF2); \ } while (0) -#define SERIAL_RXD_READ() (~SERIAL_RXD_PIN&(1<<SERIAL_RXD_BIT)) +//#define SERIAL_RXD_READ() (~SERIAL_RXD_PIN&(1<<SERIAL_RXD_BIT)) +#define SERIAL_RXD_READ() ((SERIAL_RXD_PIN&(1<<SERIAL_RXD_BIT))) #define SERIAL_TXD_DDR DDRD #define SERIAL_TXD_PORT PORTD diff --git a/converter/pc98_usb/matrix.c b/converter/pc98_usb/matrix.c index b3c11dc210..ef2bc38186 100644 --- a/converter/pc98_usb/matrix.c +++ b/converter/pc98_usb/matrix.c @@ -73,6 +73,8 @@ void matrix_init(void) PC98_RDY_PORT |= (1<<PC98_RDY_BIT); PC98_RTY_PORT |= (1<<PC98_RTY_BIT); + DDRD |= 1<<7; + serial_init(); @@ -83,6 +85,9 @@ void matrix_init(void) _delay_us(13); PC98_RDY_PORT |= (1<<PC98_RDY_BIT); + // PC98 ready + PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT); + // initialize matrix state: all keys off for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00; @@ -96,6 +101,7 @@ uint8_t matrix_scan(void) uint8_t code; PC98_RDY_PORT |= (1<<PC98_RDY_BIT); + _delay_us(30); code = serial_recv(); PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT); if (!code) return 0; diff --git a/protocol/serial_soft.c b/protocol/serial_soft.c index e0661c3aa1..47b1e4571d 100644 --- a/protocol/serial_soft.c +++ b/protocol/serial_soft.c @@ -48,6 +48,23 @@ 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(); @@ -60,6 +77,7 @@ static uint8_t rbuf[RBUF_SIZE]; static uint8_t rbuf_head = 0; static uint8_t rbuf_tail = 0; + uint8_t serial_recv(void) { uint8_t data = 0; @@ -103,6 +121,7 @@ void serial_send(uint8_t data) /* detect edge of start bit */ ISR(SERIAL_RXD_VECT) { +PORTD ^= 1<<7; SERIAL_RXD_INT_ENTER() uint8_t data = 0; @@ -120,11 +139,15 @@ ISR(SERIAL_RXD_VECT) #endif /* to center of start bit */ - _delay_us(WAIT_US/2); + //_delay_us(WAIT_US/2); + WAIT4(WAIT_TICK/2); +PORTD ^= 1<<7; do { /* to center of next bit */ - _delay_us(WAIT_US); + //_delay_us(WAIT_US); + WAIT4(WAIT_TICK); +PORTD ^= 1<<7; if (SERIAL_RXD_READ()) { data |= mask; parity ^= 1; @@ -137,19 +160,22 @@ ISR(SERIAL_RXD_VECT) } while (mask); /* to center of parity bit */ - _delay_us(WAIT_US); - parity ^= SERIAL_RXD_READ(); + //_delay_us(WAIT_US); + WAIT4(WAIT_TICK); + if (SERIAL_RXD_READ()) { parity ^= 1; } +PORTD ^= 1<<7; /* to center of stop bit */ - _delay_us(WAIT_US); - _delay_us(WAIT_US/2); + //_delay_us(WAIT_US); + WAIT4(WAIT_TICK); - parity = 1; uint8_t next = (rbuf_head + 1) % RBUF_SIZE; - if (parity && next != rbuf_tail) { + //if (parity && next != rbuf_tail) { + if (next != rbuf_tail) { rbuf[rbuf_head] = data; rbuf_head = next; } SERIAL_RXD_INT_EXIT(); +PORTD ^= 1<<7; } |