diff options
Diffstat (limited to 'tmk_core/protocol/serial_soft.c')
| -rw-r--r-- | tmk_core/protocol/serial_soft.c | 81 |
1 files changed, 38 insertions, 43 deletions
diff --git a/tmk_core/protocol/serial_soft.c b/tmk_core/protocol/serial_soft.c index 44822b7e43..b409079954 100644 --- a/tmk_core/protocol/serial_soft.c +++ b/tmk_core/protocol/serial_soft.c @@ -49,37 +49,35 @@ POSSIBILITY OF SUCH DAMAGE. * TODO: delay is not accurate enough. Instruction cycle should be counted and inline assemby is needed. */ -#define WAIT_US (1000000L/SERIAL_SOFT_BAUD) +#define WAIT_US (1000000L / SERIAL_SOFT_BAUD) #ifdef SERIAL_SOFT_LOGIC_NEGATIVE - #define SERIAL_SOFT_RXD_IN() !(SERIAL_SOFT_RXD_READ()) - #define SERIAL_SOFT_TXD_ON() SERIAL_SOFT_TXD_LO() - #define SERIAL_SOFT_TXD_OFF() SERIAL_SOFT_TXD_HI() +# define SERIAL_SOFT_RXD_IN() !(SERIAL_SOFT_RXD_READ()) +# define SERIAL_SOFT_TXD_ON() SERIAL_SOFT_TXD_LO() +# define SERIAL_SOFT_TXD_OFF() SERIAL_SOFT_TXD_HI() #else - #define SERIAL_SOFT_RXD_IN() !!(SERIAL_SOFT_RXD_READ()) - #define SERIAL_SOFT_TXD_ON() SERIAL_SOFT_TXD_HI() - #define SERIAL_SOFT_TXD_OFF() SERIAL_SOFT_TXD_LO() +# define SERIAL_SOFT_RXD_IN() !!(SERIAL_SOFT_RXD_READ()) +# define SERIAL_SOFT_TXD_ON() SERIAL_SOFT_TXD_HI() +# define SERIAL_SOFT_TXD_OFF() SERIAL_SOFT_TXD_LO() #endif #ifdef SERIAL_SOFT_PARITY_EVEN - #define SERIAL_SOFT_PARITY_VAL 0 +# define SERIAL_SOFT_PARITY_VAL 0 #elif defined(SERIAL_SOFT_PARITY_ODD) - #define SERIAL_SOFT_PARITY_VAL 1 +# define SERIAL_SOFT_PARITY_VAL 1 #endif /* debug for signal timing, see debug pin with oscilloscope */ #define SERIAL_SOFT_DEBUG #ifdef SERIAL_SOFT_DEBUG - #define SERIAL_SOFT_DEBUG_INIT() (DDRD |= 1<<7) - #define SERIAL_SOFT_DEBUG_TGL() (PORTD ^= 1<<7) +# define SERIAL_SOFT_DEBUG_INIT() (DDRD |= 1 << 7) +# define SERIAL_SOFT_DEBUG_TGL() (PORTD ^= 1 << 7) #else - #define SERIAL_SOFT_DEBUG_INIT() - #define SERIAL_SOFT_DEBUG_TGL() +# define SERIAL_SOFT_DEBUG_INIT() +# define SERIAL_SOFT_DEBUG_TGL() #endif - -void serial_init(void) -{ +void serial_init(void) { SERIAL_SOFT_DEBUG_INIT(); SERIAL_SOFT_RXD_INIT(); @@ -87,46 +85,42 @@ void serial_init(void) } /* RX ring buffer */ -#define RBUF_SIZE 8 +#define RBUF_SIZE 8 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 serial_recv(void) { uint8_t data = 0; if (rbuf_head == rbuf_tail) { return 0; } - data = rbuf[rbuf_tail]; + data = rbuf[rbuf_tail]; rbuf_tail = (rbuf_tail + 1) % RBUF_SIZE; return data; } -int16_t serial_recv2(void) -{ +int16_t serial_recv2(void) { uint8_t data = 0; if (rbuf_head == rbuf_tail) { return -1; } - data = rbuf[rbuf_tail]; + data = rbuf[rbuf_tail]; rbuf_tail = (rbuf_tail + 1) % RBUF_SIZE; return data; } -void serial_send(uint8_t data) -{ +void serial_send(uint8_t data) { /* signal state: IDLE: ON, START: OFF, STOP: ON, DATA0: OFF, DATA1: ON */ #ifdef SERIAL_SOFT_BIT_ORDER_MSB - #ifdef SERIAL_SOFT_DATA_7BIT +# ifdef SERIAL_SOFT_DATA_7BIT uint8_t mask = 0x40; - #else +# else uint8_t mask = 0x80; - #endif +# endif #else uint8_t mask = 0x01; #endif @@ -138,11 +132,11 @@ void serial_send(uint8_t data) _delay_us(WAIT_US); #ifdef SERIAL_SOFT_DATA_7BIT - while (mask&0x7F) { + while (mask & 0x7F) { #else - while (mask&0xFF) { + while (mask & 0xFF) { #endif - if (data&mask) { + if (data & mask) { SERIAL_SOFT_TXD_ON(); parity ^= 1; } else { @@ -173,19 +167,18 @@ void serial_send(uint8_t data) } /* detect edge of start bit */ -ISR(SERIAL_SOFT_RXD_VECT) -{ +ISR(SERIAL_SOFT_RXD_VECT) { SERIAL_SOFT_DEBUG_TGL(); SERIAL_SOFT_RXD_INT_ENTER() uint8_t data = 0; #ifdef SERIAL_SOFT_BIT_ORDER_MSB - #ifdef SERIAL_SOFT_DATA_7BIT +# ifdef SERIAL_SOFT_DATA_7BIT uint8_t mask = 0x40; - #else +# else uint8_t mask = 0x80; - #endif +# endif #else uint8_t mask = 0x01; #endif @@ -193,13 +186,13 @@ ISR(SERIAL_SOFT_RXD_VECT) uint8_t parity = 0; /* to center of start bit */ - _delay_us(WAIT_US/2); + _delay_us(WAIT_US / 2); SERIAL_SOFT_DEBUG_TGL(); do { /* to center of next bit */ _delay_us(WAIT_US); - SERIAL_SOFT_DEBUG_TGL(); + SERIAL_SOFT_DEBUG_TGL(); if (SERIAL_SOFT_RXD_IN()) { data |= mask; parity ^= 1; @@ -210,15 +203,17 @@ ISR(SERIAL_SOFT_RXD_VECT) mask <<= 1; #endif #ifdef SERIAL_SOFT_DATA_7BIT - } while (mask&0x7F); + } while (mask & 0x7F); #else - } while (mask&0xFF); + } while (mask & 0xFF); #endif #if defined(SERIAL_SOFT_PARITY_EVEN) || defined(SERIAL_SOFT_PARITY_ODD) /* to center of parity bit */ _delay_us(WAIT_US); - if (SERIAL_SOFT_RXD_IN()) { parity ^= 1; } + if (SERIAL_SOFT_RXD_IN()) { + parity ^= 1; + } SERIAL_SOFT_DEBUG_TGL(); #endif @@ -232,7 +227,7 @@ ISR(SERIAL_SOFT_RXD_VECT) if (next != rbuf_tail) { #endif rbuf[rbuf_head] = data; - rbuf_head = next; + rbuf_head = next; } SERIAL_SOFT_RXD_INT_EXIT(); |