tmk
11 anos atrás
1 arquivos alterados com 32 adições e 7 exclusões
+ 32
- 7
protocol/serial_soft.c
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| @@ -46,7 +46,7 @@ POSSIBILITY OF SUCH DAMAGE. | |||
| * is still useful for negative logic signal like Sun protocol not supported by hardware USART. | |||
| */ | |||
| #define WAIT_US (1000000/SERIAL_BAUD) | |||
| #define WAIT_US (1000000L/SERIAL_BAUD) | |||
| /* debug for signal timing, see debug pin with oscilloscope */ | |||
| #ifdef SERIAL_SOFT_DEBUG | |||
| @@ -100,18 +100,33 @@ int16_t serial_recv2(void) | |||
| 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 | |||
| #ifdef SERIAL_PARITY_ODD | |||
| uint8_t parity = 1; | |||
| #elif defined(SERIAL_PARITY_EVEN) | |||
| uint8_t parity = 0; | |||
| #endif | |||
| /* start bit */ | |||
| SERIAL_TXD_OFF(); | |||
| _delay_us(WAIT_US-2); | |||
| while (mask) { | |||
| if (data&mask) { SERIAL_TXD_ON(); } else { SERIAL_TXD_OFF(); } | |||
| _delay_us(WAIT_US); | |||
| if (data&mask) { | |||
| SERIAL_TXD_ON(); | |||
| #if defined(SERIAL_PARITY_EVEN) || defined(SERIAL_PARITY_ODD) | |||
| parity ^= 1; | |||
| #endif | |||
| } else { | |||
| SERIAL_TXD_OFF(); | |||
| } | |||
| _delay_us(WAIT_US-2); | |||
| #ifdef SERIAL_BIT_ORDER_MSB | |||
| mask >>= 1; | |||
| @@ -120,9 +135,19 @@ void serial_send(uint8_t data) | |||
| #endif | |||
| } | |||
| #if defined(SERIAL_PARITY_EVEN) || defined(SERIAL_PARITY_ODD) | |||
| /* to center of parity bit */ | |||
| if (parity) { | |||
| SERIAL_TXD_ON(); | |||
| } else { | |||
| SERIAL_TXD_OFF(); | |||
| } | |||
| _delay_us(WAIT_US-2); | |||
| #endif | |||
| /* stop bit */ | |||
| SERIAL_TXD_ON(); | |||
| _delay_us(WAIT_US); | |||
| _delay_us(WAIT_US-2); | |||
| } | |||
| /* detect edge of start bit */ | |||
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