M converter/pc98_usb/config.h => converter/pc98_usb/config.h +3 -20
@@ 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); \
M converter/sun_usb/config.h => converter/sun_usb/config.h +37 -31
@@ 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); \
- /* enable interrupt: INT2(rising edge) */ \
- EICRA |= ((1<<ISC21)|(1<<ISC20)); \
- EIMSK |= (1<<INT2); \
+ 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 { \
- /* clear interrupt flag */ \
- EIFR = (1<<INTF2); \
+#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 { \
- /* pin configuration: output */ \
- SERIAL_TXD_DDR |= (1<<SERIAL_TXD_BIT); \
- /* idle */ \
- SERIAL_TXD_ON(); \
+#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_SOFT_TXD_DDR |= (1<<SERIAL_SOFT_TXD_BIT); \
+ /* idle */ \
+ SERIAL_SOFT_TXD_ON(); \
} while (0)
#endif
M protocol/serial_soft.c => protocol/serial_soft.c +53 -45
@@ 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();
}