summaryrefslogtreecommitdiffstats
path: root/quantum/split_common/serial.c
diff options
context:
space:
mode:
Diffstat (limited to 'quantum/split_common/serial.c')
-rw-r--r--quantum/split_common/serial.c742
1 files changed, 355 insertions, 387 deletions
diff --git a/quantum/split_common/serial.c b/quantum/split_common/serial.c
index 322ab8030b..c4ef2a97e7 100644
--- a/quantum/split_common/serial.c
+++ b/quantum/split_common/serial.c
@@ -8,7 +8,7 @@
*/
#ifndef F_CPU
-#define F_CPU 16000000
+# define F_CPU 16000000
#endif
#include <avr/io.h>
@@ -21,252 +21,224 @@
#ifdef SOFT_SERIAL_PIN
-#ifdef __AVR_ATmega32U4__
- // if using ATmega32U4 I2C, can not use PD0 and PD1 in soft serial.
- #ifdef USE_AVR_I2C
- #if SOFT_SERIAL_PIN == D0 || SOFT_SERIAL_PIN == D1
- #error Using ATmega32U4 I2C, so can not use PD0, PD1
- #endif
- #endif
-
- #define setPinInputHigh(pin) (DDRx_ADDRESS(pin) &= ~_BV((pin) & 0xF), \
- PORTx_ADDRESS(pin) |= _BV((pin) & 0xF))
- #define setPinOutput(pin) (DDRx_ADDRESS(pin) |= _BV((pin) & 0xF))
- #define writePinHigh(pin) (PORTx_ADDRESS(pin) |= _BV((pin) & 0xF))
- #define writePinLow(pin) (PORTx_ADDRESS(pin) &= ~_BV((pin) & 0xF))
- #define readPin(pin) ((bool)(PINx_ADDRESS(pin) & _BV((pin) & 0xF)))
-
- #if SOFT_SERIAL_PIN >= D0 && SOFT_SERIAL_PIN <= D3
- #if SOFT_SERIAL_PIN == D0
- #define EIMSK_BIT _BV(INT0)
- #define EICRx_BIT (~(_BV(ISC00) | _BV(ISC01)))
- #define SERIAL_PIN_INTERRUPT INT0_vect
- #elif SOFT_SERIAL_PIN == D1
- #define EIMSK_BIT _BV(INT1)
- #define EICRx_BIT (~(_BV(ISC10) | _BV(ISC11)))
- #define SERIAL_PIN_INTERRUPT INT1_vect
- #elif SOFT_SERIAL_PIN == D2
- #define EIMSK_BIT _BV(INT2)
- #define EICRx_BIT (~(_BV(ISC20) | _BV(ISC21)))
- #define SERIAL_PIN_INTERRUPT INT2_vect
- #elif SOFT_SERIAL_PIN == D3
- #define EIMSK_BIT _BV(INT3)
- #define EICRx_BIT (~(_BV(ISC30) | _BV(ISC31)))
- #define SERIAL_PIN_INTERRUPT INT3_vect
- #endif
- #elif SOFT_SERIAL_PIN == E6
- #define EIMSK_BIT _BV(INT6)
- #define EICRx_BIT (~(_BV(ISC60) | _BV(ISC61)))
- #define SERIAL_PIN_INTERRUPT INT6_vect
- #else
- #error invalid SOFT_SERIAL_PIN value
- #endif
-
-#else
- #error serial.c now support ATmega32U4 only
-#endif
-
-#define ALWAYS_INLINE __attribute__((always_inline))
-#define NO_INLINE __attribute__((noinline))
-#define _delay_sub_us(x) __builtin_avr_delay_cycles(x)
+# ifdef __AVR_ATmega32U4__
+// if using ATmega32U4 I2C, can not use PD0 and PD1 in soft serial.
+# ifdef USE_AVR_I2C
+# if SOFT_SERIAL_PIN == D0 || SOFT_SERIAL_PIN == D1
+# error Using ATmega32U4 I2C, so can not use PD0, PD1
+# endif
+# endif
+
+# define setPinInputHigh(pin) (DDRx_ADDRESS(pin) &= ~_BV((pin)&0xF), PORTx_ADDRESS(pin) |= _BV((pin)&0xF))
+# define setPinOutput(pin) (DDRx_ADDRESS(pin) |= _BV((pin)&0xF))
+# define writePinHigh(pin) (PORTx_ADDRESS(pin) |= _BV((pin)&0xF))
+# define writePinLow(pin) (PORTx_ADDRESS(pin) &= ~_BV((pin)&0xF))
+# define readPin(pin) ((bool)(PINx_ADDRESS(pin) & _BV((pin)&0xF)))
+
+# if SOFT_SERIAL_PIN >= D0 && SOFT_SERIAL_PIN <= D3
+# if SOFT_SERIAL_PIN == D0
+# define EIMSK_BIT _BV(INT0)
+# define EICRx_BIT (~(_BV(ISC00) | _BV(ISC01)))
+# define SERIAL_PIN_INTERRUPT INT0_vect
+# elif SOFT_SERIAL_PIN == D1
+# define EIMSK_BIT _BV(INT1)
+# define EICRx_BIT (~(_BV(ISC10) | _BV(ISC11)))
+# define SERIAL_PIN_INTERRUPT INT1_vect
+# elif SOFT_SERIAL_PIN == D2
+# define EIMSK_BIT _BV(INT2)
+# define EICRx_BIT (~(_BV(ISC20) | _BV(ISC21)))
+# define SERIAL_PIN_INTERRUPT INT2_vect
+# elif SOFT_SERIAL_PIN == D3
+# define EIMSK_BIT _BV(INT3)
+# define EICRx_BIT (~(_BV(ISC30) | _BV(ISC31)))
+# define SERIAL_PIN_INTERRUPT INT3_vect
+# endif
+# elif SOFT_SERIAL_PIN == E6
+# define EIMSK_BIT _BV(INT6)
+# define EICRx_BIT (~(_BV(ISC60) | _BV(ISC61)))
+# define SERIAL_PIN_INTERRUPT INT6_vect
+# else
+# error invalid SOFT_SERIAL_PIN value
+# endif
+
+# else
+# error serial.c now support ATmega32U4 only
+# endif
+
+# define ALWAYS_INLINE __attribute__((always_inline))
+# define NO_INLINE __attribute__((noinline))
+# define _delay_sub_us(x) __builtin_avr_delay_cycles(x)
// parity check
-#define ODD_PARITY 1
-#define EVEN_PARITY 0
-#define PARITY EVEN_PARITY
-
-#ifdef SERIAL_DELAY
- // custom setup in config.h
- // #define TID_SEND_ADJUST 2
- // #define SERIAL_DELAY 6 // micro sec
- // #define READ_WRITE_START_ADJUST 30 // cycles
- // #define READ_WRITE_WIDTH_ADJUST 8 // cycles
-#else
+# define ODD_PARITY 1
+# define EVEN_PARITY 0
+# define PARITY EVEN_PARITY
+
+# ifdef SERIAL_DELAY
+// custom setup in config.h
+// #define TID_SEND_ADJUST 2
+// #define SERIAL_DELAY 6 // micro sec
+// #define READ_WRITE_START_ADJUST 30 // cycles
+// #define READ_WRITE_WIDTH_ADJUST 8 // cycles
+# else
// ============ Standard setups ============
-#ifndef SELECT_SOFT_SERIAL_SPEED
-#define SELECT_SOFT_SERIAL_SPEED 1
+# ifndef SELECT_SOFT_SERIAL_SPEED
+# define SELECT_SOFT_SERIAL_SPEED 1
// 0: about 189kbps (Experimental only)
// 1: about 137kbps (default)
// 2: about 75kbps
// 3: about 39kbps
// 4: about 26kbps
// 5: about 20kbps
-#endif
-
-#if __GNUC__ < 6
- #define TID_SEND_ADJUST 14
-#else
- #define TID_SEND_ADJUST 2
-#endif
-
-#if SELECT_SOFT_SERIAL_SPEED == 0
- // Very High speed
- #define SERIAL_DELAY 4 // micro sec
- #if __GNUC__ < 6
- #define READ_WRITE_START_ADJUST 33 // cycles
- #define READ_WRITE_WIDTH_ADJUST 3 // cycles
- #else
- #define READ_WRITE_START_ADJUST 34 // cycles
- #define READ_WRITE_WIDTH_ADJUST 7 // cycles
- #endif
-#elif SELECT_SOFT_SERIAL_SPEED == 1
- // High speed
- #define SERIAL_DELAY 6 // micro sec
- #if __GNUC__ < 6
- #define READ_WRITE_START_ADJUST 30 // cycles
- #define READ_WRITE_WIDTH_ADJUST 3 // cycles
- #else
- #define READ_WRITE_START_ADJUST 33 // cycles
- #define READ_WRITE_WIDTH_ADJUST 7 // cycles
- #endif
-#elif SELECT_SOFT_SERIAL_SPEED == 2
- // Middle speed
- #define SERIAL_DELAY 12 // micro sec
- #define READ_WRITE_START_ADJUST 30 // cycles
- #if __GNUC__ < 6
- #define READ_WRITE_WIDTH_ADJUST 3 // cycles
- #else
- #define READ_WRITE_WIDTH_ADJUST 7 // cycles
- #endif
-#elif SELECT_SOFT_SERIAL_SPEED == 3
- // Low speed
- #define SERIAL_DELAY 24 // micro sec
- #define READ_WRITE_START_ADJUST 30 // cycles
- #if __GNUC__ < 6
- #define READ_WRITE_WIDTH_ADJUST 3 // cycles
- #else
- #define READ_WRITE_WIDTH_ADJUST 7 // cycles
- #endif
-#elif SELECT_SOFT_SERIAL_SPEED == 4
- // Very Low speed
- #define SERIAL_DELAY 36 // micro sec
- #define READ_WRITE_START_ADJUST 30 // cycles
- #if __GNUC__ < 6
- #define READ_WRITE_WIDTH_ADJUST 3 // cycles
- #else
- #define READ_WRITE_WIDTH_ADJUST 7 // cycles
- #endif
-#elif SELECT_SOFT_SERIAL_SPEED == 5
- // Ultra Low speed
- #define SERIAL_DELAY 48 // micro sec
- #define READ_WRITE_START_ADJUST 30 // cycles
- #if __GNUC__ < 6
- #define READ_WRITE_WIDTH_ADJUST 3 // cycles
- #else
- #define READ_WRITE_WIDTH_ADJUST 7 // cycles
- #endif
-#else
-#error invalid SELECT_SOFT_SERIAL_SPEED value
-#endif /* SELECT_SOFT_SERIAL_SPEED */
-#endif /* SERIAL_DELAY */
-
-#define SERIAL_DELAY_HALF1 (SERIAL_DELAY/2)
-#define SERIAL_DELAY_HALF2 (SERIAL_DELAY - SERIAL_DELAY/2)
-
-#define SLAVE_INT_WIDTH_US 1
-#ifndef SERIAL_USE_MULTI_TRANSACTION
- #define SLAVE_INT_RESPONSE_TIME SERIAL_DELAY
-#else
- #define SLAVE_INT_ACK_WIDTH_UNIT 2
- #define SLAVE_INT_ACK_WIDTH 4
-#endif
-
-static SSTD_t *Transaction_table = NULL;
+# endif
+
+# if __GNUC__ < 6
+# define TID_SEND_ADJUST 14
+# else
+# define TID_SEND_ADJUST 2
+# endif
+
+# if SELECT_SOFT_SERIAL_SPEED == 0
+// Very High speed
+# define SERIAL_DELAY 4 // micro sec
+# if __GNUC__ < 6
+# define READ_WRITE_START_ADJUST 33 // cycles
+# define READ_WRITE_WIDTH_ADJUST 3 // cycles
+# else
+# define READ_WRITE_START_ADJUST 34 // cycles
+# define READ_WRITE_WIDTH_ADJUST 7 // cycles
+# endif
+# elif SELECT_SOFT_SERIAL_SPEED == 1
+// High speed
+# define SERIAL_DELAY 6 // micro sec
+# if __GNUC__ < 6
+# define READ_WRITE_START_ADJUST 30 // cycles
+# define READ_WRITE_WIDTH_ADJUST 3 // cycles
+# else
+# define READ_WRITE_START_ADJUST 33 // cycles
+# define READ_WRITE_WIDTH_ADJUST 7 // cycles
+# endif
+# elif SELECT_SOFT_SERIAL_SPEED == 2
+// Middle speed
+# define SERIAL_DELAY 12 // micro sec
+# define READ_WRITE_START_ADJUST 30 // cycles
+# if __GNUC__ < 6
+# define READ_WRITE_WIDTH_ADJUST 3 // cycles
+# else
+# define READ_WRITE_WIDTH_ADJUST 7 // cycles
+# endif
+# elif SELECT_SOFT_SERIAL_SPEED == 3
+// Low speed
+# define SERIAL_DELAY 24 // micro sec
+# define READ_WRITE_START_ADJUST 30 // cycles
+# if __GNUC__ < 6
+# define READ_WRITE_WIDTH_ADJUST 3 // cycles
+# else
+# define READ_WRITE_WIDTH_ADJUST 7 // cycles
+# endif
+# elif SELECT_SOFT_SERIAL_SPEED == 4
+// Very Low speed
+# define SERIAL_DELAY 36 // micro sec
+# define READ_WRITE_START_ADJUST 30 // cycles
+# if __GNUC__ < 6
+# define READ_WRITE_WIDTH_ADJUST 3 // cycles
+# else
+# define READ_WRITE_WIDTH_ADJUST 7 // cycles
+# endif
+# elif SELECT_SOFT_SERIAL_SPEED == 5
+// Ultra Low speed
+# define SERIAL_DELAY 48 // micro sec
+# define READ_WRITE_START_ADJUST 30 // cycles
+# if __GNUC__ < 6
+# define READ_WRITE_WIDTH_ADJUST 3 // cycles
+# else
+# define READ_WRITE_WIDTH_ADJUST 7 // cycles
+# endif
+# else
+# error invalid SELECT_SOFT_SERIAL_SPEED value
+# endif /* SELECT_SOFT_SERIAL_SPEED */
+# endif /* SERIAL_DELAY */
+
+# define SERIAL_DELAY_HALF1 (SERIAL_DELAY / 2)
+# define SERIAL_DELAY_HALF2 (SERIAL_DELAY - SERIAL_DELAY / 2)
+
+# define SLAVE_INT_WIDTH_US 1
+# ifndef SERIAL_USE_MULTI_TRANSACTION
+# define SLAVE_INT_RESPONSE_TIME SERIAL_DELAY
+# else
+# define SLAVE_INT_ACK_WIDTH_UNIT 2
+# define SLAVE_INT_ACK_WIDTH 4
+# endif
+
+static SSTD_t *Transaction_table = NULL;
static uint8_t Transaction_table_size = 0;
inline static void serial_delay(void) ALWAYS_INLINE;
-inline static
-void serial_delay(void) {
- _delay_us(SERIAL_DELAY);
-}
+inline static void serial_delay(void) { _delay_us(SERIAL_DELAY); }
inline static void serial_delay_half1(void) ALWAYS_INLINE;
-inline static
-void serial_delay_half1(void) {
- _delay_us(SERIAL_DELAY_HALF1);
-}
+inline static void serial_delay_half1(void) { _delay_us(SERIAL_DELAY_HALF1); }
inline static void serial_delay_half2(void) ALWAYS_INLINE;
-inline static
-void serial_delay_half2(void) {
- _delay_us(SERIAL_DELAY_HALF2);
-}
+inline static void serial_delay_half2(void) { _delay_us(SERIAL_DELAY_HALF2); }
inline static void serial_output(void) ALWAYS_INLINE;
-inline static
-void serial_output(void) {
- setPinOutput(SOFT_SERIAL_PIN);
-}
+inline static void serial_output(void) { setPinOutput(SOFT_SERIAL_PIN); }
// make the serial pin an input with pull-up resistor
inline static void serial_input_with_pullup(void) ALWAYS_INLINE;
-inline static
-void serial_input_with_pullup(void) {
- setPinInputHigh(SOFT_SERIAL_PIN);
-}
+inline static void serial_input_with_pullup(void) { setPinInputHigh(SOFT_SERIAL_PIN); }
inline static uint8_t serial_read_pin(void) ALWAYS_INLINE;
-inline static
-uint8_t serial_read_pin(void) {
- return !! readPin(SOFT_SERIAL_PIN);
-}
+inline static uint8_t serial_read_pin(void) { return !!readPin(SOFT_SERIAL_PIN); }
inline static void serial_low(void) ALWAYS_INLINE;
-inline static
-void serial_low(void) {
- writePinLow(SOFT_SERIAL_PIN);
-}
+inline static void serial_low(void) { writePinLow(SOFT_SERIAL_PIN); }
inline static void serial_high(void) ALWAYS_INLINE;
-inline static
-void serial_high(void) {
- writePinHigh(SOFT_SERIAL_PIN);
-}
+inline static void serial_high(void) { writePinHigh(SOFT_SERIAL_PIN); }
-void soft_serial_initiator_init(SSTD_t *sstd_table, int sstd_table_size)
-{
- Transaction_table = sstd_table;
+void soft_serial_initiator_init(SSTD_t *sstd_table, int sstd_table_size) {
+ Transaction_table = sstd_table;
Transaction_table_size = (uint8_t)sstd_table_size;
serial_output();
serial_high();
}
-void soft_serial_target_init(SSTD_t *sstd_table, int sstd_table_size)
-{
- Transaction_table = sstd_table;
+void soft_serial_target_init(SSTD_t *sstd_table, int sstd_table_size) {
+ Transaction_table = sstd_table;
Transaction_table_size = (uint8_t)sstd_table_size;
serial_input_with_pullup();
// Enable INT0-INT3,INT6
EIMSK |= EIMSK_BIT;
-#if SOFT_SERIAL_PIN == E6
+# if SOFT_SERIAL_PIN == E6
// Trigger on falling edge of INT6
EICRB &= EICRx_BIT;
-#else
+# else
// Trigger on falling edge of INT0-INT3
EICRA &= EICRx_BIT;
-#endif
+# endif
}
// Used by the sender to synchronize timing with the reciver.
static void sync_recv(void) NO_INLINE;
-static
-void sync_recv(void) {
- for (uint8_t i = 0; i < SERIAL_DELAY*5 && serial_read_pin(); i++ ) {
- }
- // This shouldn't hang if the target disconnects because the
- // serial line will float to high if the target does disconnect.
- while (!serial_read_pin());
+static void sync_recv(void) {
+ for (uint8_t i = 0; i < SERIAL_DELAY * 5 && serial_read_pin(); i++) {
+ }
+ // This shouldn't hang if the target disconnects because the
+ // serial line will float to high if the target does disconnect.
+ while (!serial_read_pin())
+ ;
}
// Used by the reciver to send a synchronization signal to the sender.
static void sync_send(void) NO_INLINE;
-static
-void sync_send(void) {
- serial_low();
- serial_delay();
- serial_high();
+static void sync_send(void) {
+ serial_low();
+ serial_delay();
+ serial_high();
}
// Reads a byte from the serial line
@@ -274,92 +246,94 @@ static uint8_t serial_read_chunk(uint8_t *pterrcount, uint8_t bit) NO_INLINE;
static uint8_t serial_read_chunk(uint8_t *pterrcount, uint8_t bit) {
uint8_t byte, i, p, pb;
- _delay_sub_us(READ_WRITE_START_ADJUST);
- for( i = 0, byte = 0, p = PARITY; i < bit; i++ ) {
- serial_delay_half1(); // read the middle of pulses
- if( serial_read_pin() ) {
- byte = (byte << 1) | 1; p ^= 1;
- } else {
- byte = (byte << 1) | 0; p ^= 0;
- }
- _delay_sub_us(READ_WRITE_WIDTH_ADJUST);
- serial_delay_half2();
- }
- /* recive parity bit */
- serial_delay_half1(); // read the middle of pulses
- pb = serial_read_pin();
- _delay_sub_us(READ_WRITE_WIDTH_ADJUST);
- serial_delay_half2();
-
- *pterrcount += (p != pb)? 1 : 0;
-
- return byte;
+ _delay_sub_us(READ_WRITE_START_ADJUST);
+ for (i = 0, byte = 0, p = PARITY; i < bit; i++) {
+ serial_delay_half1(); // read the middle of pulses
+ if (serial_read_pin()) {
+ byte = (byte << 1) | 1;
+ p ^= 1;
+ } else {
+ byte = (byte << 1) | 0;
+ p ^= 0;
+ }
+ _delay_sub_us(READ_WRITE_WIDTH_ADJUST);
+ serial_delay_half2();
+ }
+ /* recive parity bit */
+ serial_delay_half1(); // read the middle of pulses
+ pb = serial_read_pin();
+ _delay_sub_us(READ_WRITE_WIDTH_ADJUST);
+ serial_delay_half2();
+
+ *pterrcount += (p != pb) ? 1 : 0;
+
+ return byte;
}
// Sends a byte with MSB ordering
void serial_write_chunk(uint8_t data, uint8_t bit) NO_INLINE;
void serial_write_chunk(uint8_t data, uint8_t bit) {
uint8_t b, p;
- for( p = PARITY, b = 1<<(bit-1); b ; b >>= 1) {
- if(data & b) {
- serial_high(); p ^= 1;
+ for (p = PARITY, b = 1 << (bit - 1); b; b >>= 1) {
+ if (data & b) {
+ serial_high();
+ p ^= 1;
} else {
- serial_low(); p ^= 0;
+ serial_low();
+ p ^= 0;
}
serial_delay();
}
/* send parity bit */
- if(p & 1) { serial_high(); }
- else { serial_low(); }
+ if (p & 1) {
+ serial_high();
+ } else {
+ serial_low();
+ }
serial_delay();
- serial_low(); // sync_send() / senc_recv() need raise edge
+ serial_low(); // sync_send() / senc_recv() need raise edge
}
static void serial_send_packet(uint8_t *buffer, uint8_t size) NO_INLINE;
-static
-void serial_send_packet(uint8_t *buffer, uint8_t size) {
- for (uint8_t i = 0; i < size; ++i) {
- uint8_t data;
- data = buffer[i];
- sync_send();
- serial_write_chunk(data,8);
- }
+static void serial_send_packet(uint8_t *buffer, uint8_t size) {
+ for (uint8_t i = 0; i < size; ++i) {
+ uint8_t data;
+ data = buffer[i];
+ sync_send();
+ serial_write_chunk(data, 8);
+ }
}
static uint8_t serial_recive_packet(uint8_t *buffer, uint8_t size) NO_INLINE;
-static
-uint8_t serial_recive_packet(uint8_t *buffer, uint8_t size) {
- uint8_t pecount = 0;
- for (uint8_t i = 0; i < size; ++i) {
- uint8_t data;
- sync_recv();
- data = serial_read_chunk(&pecount, 8);
- buffer[i] = data;
- }
- return pecount == 0;
+static uint8_t serial_recive_packet(uint8_t *buffer, uint8_t size) {
+ uint8_t pecount = 0;
+ for (uint8_t i = 0; i < size; ++i) {
+ uint8_t data;
+ sync_recv();
+ data = serial_read_chunk(&pecount, 8);
+ buffer[i] = data;
+ }
+ return pecount == 0;
}
-inline static
-void change_sender2reciver(void) {
- sync_send(); //0
- serial_delay_half1(); //1
- serial_low(); //2
- serial_input_with_pullup(); //2
- serial_delay_half1(); //3
+inline static void change_sender2reciver(void) {
+ sync_send(); // 0
+ serial_delay_half1(); // 1
+ serial_low(); // 2
+ serial_input_with_pullup(); // 2
+ serial_delay_half1(); // 3
}
-inline static
-void change_reciver2sender(void) {
- sync_recv(); //0
- serial_delay(); //1
- serial_low(); //3
- serial_output(); //3
- serial_delay_half1(); //4
+inline static void change_reciver2sender(void) {
+ sync_recv(); // 0
+ serial_delay(); // 1
+ serial_low(); // 3
+ serial_output(); // 3
+ serial_delay_half1(); // 4
}
-static inline uint8_t nibble_bits_count(uint8_t bits)
-{
+static inline uint8_t nibble_bits_count(uint8_t bits) {
bits = (bits & 0x5) + (bits >> 1 & 0x5);
bits = (bits & 0x3) + (bits >> 2 & 0x3);
return bits;
@@ -367,51 +341,47 @@ static inline uint8_t nibble_bits_count(uint8_t bits)
// interrupt handle to be used by the target device
ISR(SERIAL_PIN_INTERRUPT) {
+# ifndef SERIAL_USE_MULTI_TRANSACTION
+ serial_low();
+ serial_output();
+ SSTD_t *trans = Transaction_table;
+# else
+ // recive transaction table index
+ uint8_t tid, bits;
+ uint8_t pecount = 0;
+ sync_recv();
+ bits = serial_read_chunk(&pecount, 7);
+ tid = bits >> 3;
+ bits = (bits & 7) != nibble_bits_count(tid);
+ if (bits || pecount > 0 || tid > Transaction_table_size) {
+ return;
+ }
+ serial_delay_half1();
-#ifndef SERIAL_USE_MULTI_TRANSACTION
- serial_low();
- serial_output();
- SSTD_t *trans = Transaction_table;
-#else
- // recive transaction table index
- uint8_t tid, bits;
- uint8_t pecount = 0;
- sync_recv();
- bits = serial_read_chunk(&pecount,7);
- tid = bits>>3;
- bits = (bits&7) != nibble_bits_count(tid);
- if( bits || pecount> 0 || tid > Transaction_table_size ) {
- return;
- }
- serial_delay_half1();
-
- serial_high(); // response step1 low->high
- serial_output();
- _delay_sub_us(SLAVE_INT_ACK_WIDTH_UNIT*SLAVE_INT_ACK_WIDTH);
- SSTD_t *trans = &Transaction_table[tid];
- serial_low(); // response step2 ack high->low
-#endif
+ serial_high(); // response step1 low->high
+ serial_output();
+ _delay_sub_us(SLAVE_INT_ACK_WIDTH_UNIT * SLAVE_INT_ACK_WIDTH);
+ SSTD_t *trans = &Transaction_table[tid];
+ serial_low(); // response step2 ack high->low
+# endif
+
+ // target send phase
+ if (trans->target2initiator_buffer_size > 0) serial_send_packet((uint8_t *)trans->target2initiator_buffer, trans->target2initiator_buffer_size);
+ // target switch to input
+ change_sender2reciver();
+
+ // target recive phase
+ if (trans->initiator2target_buffer_size > 0) {
+ if (serial_recive_packet((uint8_t *)trans->initiator2target_buffer, trans->initiator2target_buffer_size)) {
+ *trans->status = TRANSACTION_ACCEPTED;
+ } else {
+ *trans->status = TRANSACTION_DATA_ERROR;
+ }
+ } else {
+ *trans->status = TRANSACTION_ACCEPTED;
+ }
- // target send phase
- if( trans->target2initiator_buffer_size > 0 )
- serial_send_packet((uint8_t *)trans->target2initiator_buffer,
- trans->target2initiator_buffer_size);
- // target switch to input
- change_sender2reciver();
-
- // target recive phase
- if( trans->initiator2target_buffer_size > 0 ) {
- if (serial_recive_packet((uint8_t *)trans->initiator2target_buffer,
- trans->initiator2target_buffer_size) ) {
- *trans->status = TRANSACTION_ACCEPTED;
- } else {
- *trans->status = TRANSACTION_DATA_ERROR;
- }
- } else {
- *trans->status = TRANSACTION_ACCEPTED;
- }
-
- sync_recv(); //weit initiator output to high
+ sync_recv(); // weit initiator output to high
}
/////////
@@ -424,105 +394,103 @@ ISR(SERIAL_PIN_INTERRUPT) {
// TRANSACTION_NO_RESPONSE
// TRANSACTION_DATA_ERROR
// this code is very time dependent, so we need to disable interrupts
-#ifndef SERIAL_USE_MULTI_TRANSACTION
-int soft_serial_transaction(void) {
- SSTD_t *trans = Transaction_table;
-#else
-int soft_serial_transaction(int sstd_index) {
- if( sstd_index > Transaction_table_size )
- return TRANSACTION_TYPE_ERROR;
- SSTD_t *trans = &Transaction_table[sstd_index];
-#endif
- cli();
+# ifndef SERIAL_USE_MULTI_TRANSACTION
+int soft_serial_transaction(void) {
+ SSTD_t *trans = Transaction_table;
+# else
+int soft_serial_transaction(int sstd_index) {
+ if (sstd_index > Transaction_table_size) return TRANSACTION_TYPE_ERROR;
+ SSTD_t *trans = &Transaction_table[sstd_index];
+# endif
+ cli();
- // signal to the target that we want to start a transaction
- serial_output();
- serial_low();
- _delay_us(SLAVE_INT_WIDTH_US);
+ // signal to the target that we want to start a transaction
+ serial_output();
+ serial_low();
+ _delay_us(SLAVE_INT_WIDTH_US);
-#ifndef SERIAL_USE_MULTI_TRANSACTION
- // wait for the target response
- serial_input_with_pullup();
- _delay_us(SLAVE_INT_RESPONSE_TIME);
+# ifndef SERIAL_USE_MULTI_TRANSACTION
+ // wait for the target response
+ serial_input_with_pullup();
+ _delay_us(SLAVE_INT_RESPONSE_TIME);
+
+ // check if the target is present
+ if (serial_read_pin()) {
+ // target failed to pull the line low, assume not present
+ serial_output();
+ serial_high();
+ *trans->status = TRANSACTION_NO_RESPONSE;
+ sei();
+ return TRANSACTION_NO_RESPONSE;
+ }
- // check if the target is present
- if (serial_read_pin()) {
- // target failed to pull the line low, assume not present
- serial_output();
- serial_high();
- *trans->status = TRANSACTION_NO_RESPONSE;
- sei();
- return TRANSACTION_NO_RESPONSE;
- }
-
-#else
- // send transaction table index
- int tid = (sstd_index<<3) | (7 & nibble_bits_count(sstd_index));
- sync_send();
- _delay_sub_us(TID_SEND_ADJUST);
- serial_write_chunk(tid, 7);
- serial_delay_half1();
-
- // wait for the target response (step1 low->high)
- serial_input_with_pullup();
- while( !serial_read_pin() ) {
- _delay_sub_us(2);
- }
-
- // check if the target is present (step2 high->low)
- for( int i = 0; serial_read_pin(); i++ ) {
- if (i > SLAVE_INT_ACK_WIDTH + 1) {
- // slave failed to pull the line low, assume not present
- serial_output();
- serial_high();
- *trans->status = TRANSACTION_NO_RESPONSE;
- sei();
- return TRANSACTION_NO_RESPONSE;
- }
- _delay_sub_us(SLAVE_INT_ACK_WIDTH_UNIT);
- }
-#endif
+# else
+ // send transaction table index
+ int tid = (sstd_index << 3) | (7 & nibble_bits_count(sstd_index));
+ sync_send();
+ _delay_sub_us(TID_SEND_ADJUST);
+ serial_write_chunk(tid, 7);
+ serial_delay_half1();
+
+ // wait for the target response (step1 low->high)
+ serial_input_with_pullup();
+ while (!serial_read_pin()) {
+ _delay_sub_us(2);
+ }
+
+ // check if the target is present (step2 high->low)
+ for (int i = 0; serial_read_pin(); i++) {
+ if (i > SLAVE_INT_ACK_WIDTH + 1) {
+ // slave failed to pull the line low, assume not present
+ serial_output();
+ serial_high();
+ *trans->status = TRANSACTION_NO_RESPONSE;
+ sei();
+ return TRANSACTION_NO_RESPONSE;
+ }
+ _delay_sub_us(SLAVE_INT_ACK_WIDTH_UNIT);
+ }
+# endif
+
+ // initiator recive phase
+ // if the target is present syncronize with it
+ if (trans->target2initiator_buffer_size > 0) {
+ if (!serial_recive_packet((uint8_t *)trans->target2initiator_buffer, trans->target2initiator_buffer_size)) {
+ serial_output();
+ serial_high();
+ *trans->status = TRANSACTION_DATA_ERROR;
+ sei();
+ return TRANSACTION_DATA_ERROR;
+ }
+ }
+
+ // initiator switch to output
+ change_reciver2sender();
+
+ // initiator send phase
+ if (trans->initiator2target_buffer_size > 0) {
+ serial_send_packet((uint8_t *)trans->initiator2target_buffer, trans->initiator2target_buffer_size);
+ }
- // initiator recive phase
- // if the target is present syncronize with it
- if( trans->target2initiator_buffer_size > 0 ) {
- if (!serial_recive_packet((uint8_t *)trans->target2initiator_buffer,
- trans->target2initiator_buffer_size) ) {
- serial_output();
- serial_high();
- *trans->status = TRANSACTION_DATA_ERROR;
- sei();
- return TRANSACTION_DATA_ERROR;
- }
- }
-
- // initiator switch to output
- change_reciver2sender();
-
- // initiator send phase
- if( trans->initiator2target_buffer_size > 0 ) {
- serial_send_packet((uint8_t *)trans->initiator2target_buffer,
- trans->initiator2target_buffer_size);
- }
-
- // always, release the line when not in use
- sync_send();
-
- *trans->status = TRANSACTION_END;
- sei();
- return TRANSACTION_END;
+ // always, release the line when not in use
+ sync_send();
+
+ *trans->status = TRANSACTION_END;
+ sei();
+ return TRANSACTION_END;
}
-#ifdef SERIAL_USE_MULTI_TRANSACTION
+# ifdef SERIAL_USE_MULTI_TRANSACTION
int soft_serial_get_and_clean_status(int sstd_index) {
SSTD_t *trans = &Transaction_table[sstd_index];
cli();
- int retval = *trans->status;
- *trans->status = 0;;
+ int retval = *trans->status;
+ *trans->status = 0;
+ ;
sei();
return retval;
}
-#endif
+# endif
#endif