Fix software serial configure
tmk
parent
ea1ede83c3
commit
308abf598d
|
|
@ -69,11 +69,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|||
#define SERIAL_SOFT_RXD_PORT PORTD
|
||||
#define SERIAL_SOFT_RXD_PIN PIND
|
||||
#define SERIAL_SOFT_RXD_BIT 2
|
||||
#ifdef SERIAL_SOFT_LOGIC_NEGATIVE
|
||||
#define SERIAL_SOFT_RXD_READ() ~(SERIAL_SOFT_RXD_PIN&(1<<SERIAL_SOFT_RXD_BIT))
|
||||
#else
|
||||
#define SERIAL_SOFT_RXD_READ() (SERIAL_SOFT_RXD_PIN&(1<<SERIAL_SOFT_RXD_BIT))
|
||||
#endif
|
||||
#define SERIAL_SOFT_RXD_READ() (SERIAL_SOFT_RXD_PIN&(1<<SERIAL_SOFT_RXD_BIT))
|
||||
/* RXD Interupt */
|
||||
#define SERIAL_SOFT_RXD_VECT INT2_vect
|
||||
#define SERIAL_SOFT_RXD_INIT() do { \
|
||||
|
|
@ -95,21 +91,8 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|||
#define SERIAL_SOFT_TXD_PORT PORTD
|
||||
#define SERIAL_SOFT_TXD_PIN PIND
|
||||
#define SERIAL_SOFT_TXD_BIT 3
|
||||
#ifdef SERIAL_SOFT_LOGIC_NEGATIVE
|
||||
#define SERIAL_SOFT_TXD_ON() do { \
|
||||
SERIAL_SOFT_TXD_PORT &= ~(1<<SERIAL_SOFT_TXD_BIT); \
|
||||
} while (0)
|
||||
#define SERIAL_SOFT_TXD_OFF() do { \
|
||||
SERIAL_SOFT_TXD_PORT |= (1<<SERIAL_SOFT_TXD_BIT); \
|
||||
} while (0)
|
||||
#else
|
||||
#define SERIAL_SOFT_TXD_ON() do { \
|
||||
SERIAL_SOFT_TXD_PORT |= (1<<SERIAL_SOFT_TXD_BIT); \
|
||||
} while (0)
|
||||
#define SERIAL_SOFT_TXD_OFF() do { \
|
||||
SERIAL_SOFT_TXD_PORT &= ~(1<<SERIAL_SOFT_TXD_BIT); \
|
||||
} while (0)
|
||||
#endif
|
||||
#define SERIAL_SOFT_TXD_HI() do { SERIAL_SOFT_TXD_PORT |= (1<<SERIAL_SOFT_TXD_BIT); } while (0)
|
||||
#define SERIAL_SOFT_TXD_LO() do { SERIAL_SOFT_TXD_PORT &= ~(1<<SERIAL_SOFT_TXD_BIT); } while (0)
|
||||
#define SERIAL_SOFT_TXD_INIT() do { \
|
||||
/* pin configuration: output */ \
|
||||
SERIAL_SOFT_TXD_DDR |= (1<<SERIAL_SOFT_TXD_BIT); \
|
||||
|
|
|
|||
|
|
@ -43,40 +43,46 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|||
* asynchronous, negative logic, 1200baud, no flow control
|
||||
* 1-start bit, 8-data bit, non parity, 1-stop bit
|
||||
*/
|
||||
#define SERIAL_BAUD 1200
|
||||
|
||||
#define SERIAL_RXD_DDR DDRD
|
||||
#define SERIAL_RXD_PORT PORTD
|
||||
#define SERIAL_RXD_PIN PIND
|
||||
#define SERIAL_RXD_BIT 2
|
||||
#define SERIAL_RXD_VECT INT2_vect
|
||||
#define SERIAL_RXD_INIT() do { \
|
||||
#define SERIAL_SOFT_BAUD 1200
|
||||
#define SERIAL_SOFT_PARITY_NONE
|
||||
#define SERIAL_SOFT_BIT_ORDER_LSB
|
||||
#define SERIAL_SOFT_LOGIC_NEGATIVE
|
||||
/* RXD Port */
|
||||
#define SERIAL_SOFT_RXD_ENABLE
|
||||
#define SERIAL_SOFT_RXD_DDR DDRD
|
||||
#define SERIAL_SOFT_RXD_PORT PORTD
|
||||
#define SERIAL_SOFT_RXD_PIN PIND
|
||||
#define SERIAL_SOFT_RXD_BIT 2
|
||||
#define SERIAL_SOFT_RXD_VECT INT2_vect
|
||||
/* RXD Interupt */
|
||||
#define SERIAL_SOFT_RXD_INIT() do { \
|
||||
/* pin configuration: input with pull-up */ \
|
||||
SERIAL_RXD_DDR &= ~(1<<SERIAL_RXD_BIT); \
|
||||
SERIAL_RXD_PORT |= (1<<SERIAL_RXD_BIT); \
|
||||
SERIAL_SOFT_RXD_DDR &= ~(1<<SERIAL_SOFT_RXD_BIT); \
|
||||
SERIAL_SOFT_RXD_PORT |= (1<<SERIAL_SOFT_RXD_BIT); \
|
||||
/* enable interrupt: INT2(rising edge) */ \
|
||||
EICRA |= ((1<<ISC21)|(1<<ISC20)); \
|
||||
EIMSK |= (1<<INT2); \
|
||||
sei(); \
|
||||
} while (0)
|
||||
#define SERIAL_RXD_INT_ENTER()
|
||||
#define SERIAL_RXD_INT_EXIT() do { \
|
||||
#define SERIAL_SOFT_RXD_INT_ENTER()
|
||||
#define SERIAL_SOFT_RXD_INT_EXIT() do { \
|
||||
/* clear interrupt flag */ \
|
||||
EIFR = (1<<INTF2); \
|
||||
} while (0)
|
||||
#define SERIAL_RXD_READ() (~SERIAL_RXD_PIN&(1<<SERIAL_RXD_BIT))
|
||||
|
||||
#define SERIAL_TXD_DDR DDRD
|
||||
#define SERIAL_TXD_PORT PORTD
|
||||
#define SERIAL_TXD_PIN PIND
|
||||
#define SERIAL_TXD_BIT 3
|
||||
/* negative logic */
|
||||
#define SERIAL_TXD_ON() do { SERIAL_TXD_PORT &= ~(1<<SERIAL_TXD_BIT); } while (0)
|
||||
#define SERIAL_TXD_OFF() do { SERIAL_TXD_PORT |= (1<<SERIAL_TXD_BIT); } while (0)
|
||||
#define SERIAL_TXD_INIT() do { \
|
||||
#define SERIAL_SOFT_RXD_READ() (SERIAL_SOFT_RXD_PIN&(1<<SERIAL_SOFT_RXD_BIT))
|
||||
/* TXD Port */
|
||||
#define SERIAL_SOFT_TXD_ENABLE
|
||||
#define SERIAL_SOFT_TXD_DDR DDRD
|
||||
#define SERIAL_SOFT_TXD_PORT PORTD
|
||||
#define SERIAL_SOFT_TXD_PIN PIND
|
||||
#define SERIAL_SOFT_TXD_BIT 3
|
||||
#define SERIAL_SOFT_TXD_HI() do { SERIAL_SOFT_TXD_PORT |= (1<<SERIAL_SOFT_TXD_BIT); } while (0)
|
||||
#define SERIAL_SOFT_TXD_LO() do { SERIAL_SOFT_TXD_PORT &= ~(1<<SERIAL_SOFT_TXD_BIT); } while (0)
|
||||
#define SERIAL_SOFT_TXD_INIT() do { \
|
||||
/* pin configuration: output */ \
|
||||
SERIAL_TXD_DDR |= (1<<SERIAL_TXD_BIT); \
|
||||
SERIAL_SOFT_TXD_DDR |= (1<<SERIAL_SOFT_TXD_BIT); \
|
||||
/* idle */ \
|
||||
SERIAL_TXD_ON(); \
|
||||
SERIAL_SOFT_TXD_ON(); \
|
||||
} while (0)
|
||||
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -43,12 +43,32 @@ POSSIBILITY OF SUCH DAMAGE.
|
|||
|
||||
/*
|
||||
* Stupid Inefficient Busy-wait Software Serial
|
||||
* is still useful for negative logic signal like Sun protocol not supported by hardware USART.
|
||||
* which is still useful for negative logic signal like Sun protocol
|
||||
* if it is not supported by hardware UART.
|
||||
*
|
||||
* TODO: delay is not accurate enough. Instruction cycle should be counted and inline assemby is needed.
|
||||
*/
|
||||
|
||||
#define WAIT_US (1000000L/SERIAL_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()
|
||||
#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()
|
||||
#endif
|
||||
|
||||
#ifdef SERIAL_SOFT_PARITY_EVEN
|
||||
#define SERIAL_SOFT_PARITY_VAL 0
|
||||
#elif defined(SERIAL_SOFT_PARITY_ODD)
|
||||
#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)
|
||||
|
|
@ -62,8 +82,8 @@ void serial_init(void)
|
|||
{
|
||||
SERIAL_SOFT_DEBUG_INIT();
|
||||
|
||||
SERIAL_RXD_INIT();
|
||||
SERIAL_TXD_INIT();
|
||||
SERIAL_SOFT_RXD_INIT();
|
||||
SERIAL_SOFT_TXD_INIT();
|
||||
}
|
||||
|
||||
/* RX ring buffer */
|
||||
|
|
@ -101,109 +121,97 @@ void serial_send(uint8_t data)
|
|||
{
|
||||
/* signal state: IDLE: ON, START: OFF, STOP: ON, DATA0: OFF, DATA1: ON */
|
||||
|
||||
#ifdef SERIAL_BIT_ORDER_MSB
|
||||
#ifdef SERIAL_SOFT_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);
|
||||
SERIAL_SOFT_TXD_OFF();
|
||||
_delay_us(WAIT_US);
|
||||
|
||||
while (mask) {
|
||||
if (data&mask) {
|
||||
SERIAL_TXD_ON();
|
||||
#if defined(SERIAL_PARITY_EVEN) || defined(SERIAL_PARITY_ODD)
|
||||
SERIAL_SOFT_TXD_ON();
|
||||
parity ^= 1;
|
||||
#endif
|
||||
} else {
|
||||
SERIAL_TXD_OFF();
|
||||
SERIAL_SOFT_TXD_OFF();
|
||||
}
|
||||
_delay_us(WAIT_US-2);
|
||||
_delay_us(WAIT_US);
|
||||
|
||||
#ifdef SERIAL_BIT_ORDER_MSB
|
||||
#ifdef SERIAL_SOFT_BIT_ORDER_MSB
|
||||
mask >>= 1;
|
||||
#else
|
||||
mask <<= 1;
|
||||
#endif
|
||||
}
|
||||
|
||||
#if defined(SERIAL_PARITY_EVEN) || defined(SERIAL_PARITY_ODD)
|
||||
#if defined(SERIAL_SOFT_PARITY_EVEN) || defined(SERIAL_SOFT_PARITY_ODD)
|
||||
/* to center of parity bit */
|
||||
if (parity) {
|
||||
SERIAL_TXD_ON();
|
||||
if (parity != SERIAL_SOFT_PARITY_VAL) {
|
||||
SERIAL_SOFT_TXD_ON();
|
||||
} else {
|
||||
SERIAL_TXD_OFF();
|
||||
SERIAL_SOFT_TXD_OFF();
|
||||
}
|
||||
_delay_us(WAIT_US-2);
|
||||
_delay_us(WAIT_US);
|
||||
#endif
|
||||
|
||||
/* stop bit */
|
||||
SERIAL_TXD_ON();
|
||||
_delay_us(WAIT_US-2);
|
||||
SERIAL_SOFT_TXD_ON();
|
||||
_delay_us(WAIT_US);
|
||||
}
|
||||
|
||||
/* detect edge of start bit */
|
||||
ISR(SERIAL_RXD_VECT)
|
||||
ISR(SERIAL_SOFT_RXD_VECT)
|
||||
{
|
||||
SERIAL_SOFT_DEBUG_TGL()
|
||||
SERIAL_RXD_INT_ENTER()
|
||||
SERIAL_SOFT_DEBUG_TGL();
|
||||
SERIAL_SOFT_RXD_INT_ENTER()
|
||||
|
||||
uint8_t data = 0;
|
||||
|
||||
#ifdef SERIAL_BIT_ORDER_MSB
|
||||
#ifdef SERIAL_SOFT_BIT_ORDER_MSB
|
||||
uint8_t mask = 0x80;
|
||||
#else
|
||||
uint8_t mask = 0x01;
|
||||
#endif
|
||||
|
||||
#ifdef SERIAL_PARITY_ODD
|
||||
uint8_t parity = 0;
|
||||
#elif defined(SERIAL_PARITY_EVEN)
|
||||
uint8_t parity = 1;
|
||||
#endif
|
||||
|
||||
/* to center of start bit */
|
||||
_delay_us(WAIT_US/2);
|
||||
SERIAL_SOFT_DEBUG_TGL()
|
||||
SERIAL_SOFT_DEBUG_TGL();
|
||||
do {
|
||||
/* to center of next bit */
|
||||
_delay_us(WAIT_US);
|
||||
|
||||
SERIAL_SOFT_DEBUG_TGL()
|
||||
if (SERIAL_RXD_READ()) {
|
||||
SERIAL_SOFT_DEBUG_TGL();
|
||||
if (SERIAL_SOFT_RXD_IN()) {
|
||||
data |= mask;
|
||||
#if defined(SERIAL_PARITY_EVEN) || defined(SERIAL_PARITY_ODD)
|
||||
parity ^= 1;
|
||||
#endif
|
||||
}
|
||||
#ifdef SERIAL_BIT_ORDER_MSB
|
||||
#ifdef SERIAL_SOFT_BIT_ORDER_MSB
|
||||
mask >>= 1;
|
||||
#else
|
||||
mask <<= 1;
|
||||
#endif
|
||||
} while (mask);
|
||||
|
||||
#if defined(SERIAL_PARITY_EVEN) || defined(SERIAL_PARITY_ODD)
|
||||
#if defined(SERIAL_SOFT_PARITY_EVEN) || defined(SERIAL_SOFT_PARITY_ODD)
|
||||
/* to center of parity bit */
|
||||
_delay_us(WAIT_US);
|
||||
if (SERIAL_RXD_READ()) { parity ^= 1; }
|
||||
SERIAL_SOFT_DEBUG_TGL()
|
||||
if (SERIAL_SOFT_RXD_IN()) { parity ^= 1; }
|
||||
SERIAL_SOFT_DEBUG_TGL();
|
||||
#endif
|
||||
|
||||
/* to center of stop bit */
|
||||
_delay_us(WAIT_US);
|
||||
|
||||
uint8_t next = (rbuf_head + 1) % RBUF_SIZE;
|
||||
#if defined(SERIAL_PARITY_EVEN) || defined(SERIAL_PARITY_ODD)
|
||||
if (parity && next != rbuf_tail) {
|
||||
#if defined(SERIAL_SOFT_PARITY_EVEN) || defined(SERIAL_SOFT_PARITY_ODD)
|
||||
if ((parity == SERIAL_SOFT_PARITY_VAL) && next != rbuf_tail) {
|
||||
#else
|
||||
if (next != rbuf_tail) {
|
||||
#endif
|
||||
|
|
@ -211,6 +219,6 @@ ISR(SERIAL_RXD_VECT)
|
|||
rbuf_head = next;
|
||||
}
|
||||
|
||||
SERIAL_RXD_INT_EXIT();
|
||||
SERIAL_SOFT_DEBUG_TGL()
|
||||
SERIAL_SOFT_RXD_INT_EXIT();
|
||||
SERIAL_SOFT_DEBUG_TGL();
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue