From 172e6a703041363decd6fc829542f33180c13beb Mon Sep 17 00:00:00 2001 From: Nick Brassel Date: Fri, 18 Jun 2021 09:10:06 +1000 Subject: Extensible split data sync (#11930) * Extensible split data sync capability through transactions. - Split common transport has been split up between the transport layer and data layer. - Split "transactions" model used, with convergence between I2C and serial data definitions. - Slave matrix "generation count" is used to determine if the full slave matrix needs to be retrieved. - Encoders get the same "generation count" treatment. - All other blocks of data are synchronised when a change is detected. - All transmissions have a globally-configurable deadline before a transmission is forced (`FORCED_SYNC_THROTTLE_MS`, default 100ms). - Added atomicity for all core-synced data, preventing partial updates - Added retries to AVR i2c_master's i2c_start, to minimise the number of failed transactions when interrupts are disabled on the slave due to atomicity checks. - Some keyboards have had slight modifications made in order to ensure that they still build due to firmware size restrictions. * Fixup LED_MATRIX compile. * Parameterise ERROR_DISCONNECT_COUNT. --- drivers/avr/serial.c | 82 +++++++++++++++------------------------------------- 1 file changed, 24 insertions(+), 58 deletions(-) (limited to 'drivers/avr/serial.c') diff --git a/drivers/avr/serial.c b/drivers/avr/serial.c index 3647bee0d3..9a7345a53d 100644 --- a/drivers/avr/serial.c +++ b/drivers/avr/serial.c @@ -224,15 +224,8 @@ # 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; +# define SLAVE_INT_ACK_WIDTH_UNIT 2 +# define SLAVE_INT_ACK_WIDTH 4 inline static void serial_delay(void) ALWAYS_INLINE; inline static void serial_delay(void) { _delay_us(SERIAL_DELAY); } @@ -259,16 +252,12 @@ 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); } -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; +void soft_serial_initiator_init(void) { serial_output(); serial_high(); } -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; +void soft_serial_target_init(void) { serial_input_with_pullup(); // Enable INT0-INT7 @@ -395,19 +384,14 @@ 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); + bits = serial_read_chunk(&pecount, 8); tid = bits >> 3; - bits = (bits & 7) != nibble_bits_count(tid); - if (bits || pecount > 0 || tid > Transaction_table_size) { + bits = (bits & 7) != (nibble_bits_count(tid) & 7); + if (bits || pecount > 0 || tid > NUM_TOTAL_TRANSACTIONS) { return; } serial_delay_half1(); @@ -415,18 +399,22 @@ ISR(SERIAL_PIN_INTERRUPT) { 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]; + split_transaction_desc_t *trans = &split_transaction_table[tid]; serial_low(); // response step2 ack high->low -# endif + + // If the transaction has a callback, we can execute it now + if (trans->slave_callback) { + trans->slave_callback(trans->initiator2target_buffer_size, split_trans_initiator2target_buffer(trans), trans->target2initiator_buffer_size, split_trans_target2initiator_buffer(trans)); + } // target send phase - if (trans->target2initiator_buffer_size > 0) serial_send_packet((uint8_t *)trans->target2initiator_buffer, trans->target2initiator_buffer_size); + if (trans->target2initiator_buffer_size > 0) serial_send_packet((uint8_t *)split_trans_target2initiator_buffer(trans), 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)) { + if (serial_recive_packet((uint8_t *)split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size)) { *trans->status = TRANSACTION_ACCEPTED; } else { *trans->status = TRANSACTION_DATA_ERROR; @@ -448,14 +436,12 @@ 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 + if (sstd_index > NUM_TOTAL_TRANSACTIONS) return TRANSACTION_TYPE_ERROR; + split_transaction_desc_t *trans = &split_transaction_table[sstd_index]; + + if (!trans->status) return TRANSACTION_TYPE_ERROR; // not registered + cli(); // signal to the target that we want to start a transaction @@ -463,27 +449,11 @@ int soft_serial_transaction(int sstd_index) { 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); - - // 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_write_chunk(tid, 8); serial_delay_half1(); // wait for the target response (step1 low->high) @@ -504,12 +474,11 @@ int soft_serial_transaction(int sstd_index) { } _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)) { + if (!serial_recive_packet((uint8_t *)split_trans_target2initiator_buffer(trans), trans->target2initiator_buffer_size)) { serial_output(); serial_high(); *trans->status = TRANSACTION_DATA_ERROR; @@ -523,7 +492,7 @@ int soft_serial_transaction(int sstd_index) { // initiator send phase if (trans->initiator2target_buffer_size > 0) { - serial_send_packet((uint8_t *)trans->initiator2target_buffer, trans->initiator2target_buffer_size); + serial_send_packet((uint8_t *)split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size); } // always, release the line when not in use @@ -534,9 +503,8 @@ int soft_serial_transaction(int sstd_index) { return TRANSACTION_END; } -# ifdef SERIAL_USE_MULTI_TRANSACTION int soft_serial_get_and_clean_status(int sstd_index) { - SSTD_t *trans = &Transaction_table[sstd_index]; + split_transaction_desc_t *trans = &split_transaction_table[sstd_index]; cli(); int retval = *trans->status; *trans->status = 0; @@ -544,8 +512,6 @@ int soft_serial_get_and_clean_status(int sstd_index) { sei(); return retval; } -# endif - #endif // Helix serial.c history -- cgit v1.2.3 From 1bb7af4d446174b7181c9bb22dbd14c93642ea10 Mon Sep 17 00:00:00 2001 From: Joel Challis Date: Tue, 17 Aug 2021 23:43:09 +0100 Subject: Relocate platform specific drivers (#13894) * Relocate platform specific drivers * Move stm eeprom * Tidy up slightly --- drivers/avr/serial.c | 529 --------------------------------------------------- 1 file changed, 529 deletions(-) delete mode 100644 drivers/avr/serial.c (limited to 'drivers/avr/serial.c') diff --git a/drivers/avr/serial.c b/drivers/avr/serial.c deleted file mode 100644 index 9a7345a53d..0000000000 --- a/drivers/avr/serial.c +++ /dev/null @@ -1,529 +0,0 @@ -/* - * WARNING: be careful changing this code, it is very timing dependent - * - * 2018-10-28 checked - * avr-gcc 4.9.2 - * avr-gcc 5.4.0 - * avr-gcc 7.3.0 - */ - -#ifndef F_CPU -# define F_CPU 16000000 -#endif - -#include -#include -#include -#include -#include -#include "serial.h" - -#ifdef SOFT_SERIAL_PIN - -# if !(defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__) || defined(__AVR_AT90USB162__) || defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__) || defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)) -# error serial.c is not supported for the currently selected MCU -# endif -// if using ATmega32U4/2, AT90USBxxx I2C, can not use PD0 and PD1 in soft serial. -# if defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__) -# if defined(USE_AVR_I2C) && (SOFT_SERIAL_PIN == D0 || SOFT_SERIAL_PIN == D1) -# error Using I2C, so can not use PD0, PD1 -# endif -# endif -// PD0..PD3, common config -# if SOFT_SERIAL_PIN == D0 -# define EIMSK_BIT _BV(INT0) -# define EICRx_BIT (~(_BV(ISC00) | _BV(ISC01))) -# define SERIAL_PIN_INTERRUPT INT0_vect -# define EICRx EICRA -# elif SOFT_SERIAL_PIN == D1 -# define EIMSK_BIT _BV(INT1) -# define EICRx_BIT (~(_BV(ISC10) | _BV(ISC11))) -# define SERIAL_PIN_INTERRUPT INT1_vect -# define EICRx EICRA -# elif SOFT_SERIAL_PIN == D2 -# define EIMSK_BIT _BV(INT2) -# define EICRx_BIT (~(_BV(ISC20) | _BV(ISC21))) -# define SERIAL_PIN_INTERRUPT INT2_vect -# define EICRx EICRA -# elif SOFT_SERIAL_PIN == D3 -# define EIMSK_BIT _BV(INT3) -# define EICRx_BIT (~(_BV(ISC30) | _BV(ISC31))) -# define SERIAL_PIN_INTERRUPT INT3_vect -# define EICRx EICRA -# endif - -// ATmegaxxU2/AT90USB162 specific config -# if defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__) || defined(__AVR_AT90USB162__) -// PD4(INT5), PD6(INT6), PD7(INT7), PC7(INT4) -# if SOFT_SERIAL_PIN == D4 -# define EIMSK_BIT _BV(INT5) -# define EICRx_BIT (~(_BV(ISC50) | _BV(ISC51))) -# define SERIAL_PIN_INTERRUPT INT5_vect -# define EICRx EICRB -# elif SOFT_SERIAL_PIN == D6 -# define EIMSK_BIT _BV(INT6) -# define EICRx_BIT (~(_BV(ISC60) | _BV(ISC61))) -# define SERIAL_PIN_INTERRUPT INT6_vect -# define EICRx EICRB -# elif SOFT_SERIAL_PIN == D7 -# define EIMSK_BIT _BV(INT7) -# define EICRx_BIT (~(_BV(ISC70) | _BV(ISC71))) -# define SERIAL_PIN_INTERRUPT INT7_vect -# define EICRx EICRB -# elif SOFT_SERIAL_PIN == C7 -# define EIMSK_BIT _BV(INT4) -# define EICRx_BIT (~(_BV(ISC40) | _BV(ISC41))) -# define SERIAL_PIN_INTERRUPT INT4_vect -# define EICRx EICRB -# endif -# endif - -// ATmegaxxU4 specific config -# if defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__) -// PE6(INT6) -# if SOFT_SERIAL_PIN == E6 -# define EIMSK_BIT _BV(INT6) -# define EICRx_BIT (~(_BV(ISC60) | _BV(ISC61))) -# define SERIAL_PIN_INTERRUPT INT6_vect -# define EICRx EICRB -# endif -# endif - -// AT90USBxxx specific config -# if defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__) -// PE4..PE7(INT4..INT7) -# if SOFT_SERIAL_PIN == E4 -# define EIMSK_BIT _BV(INT4) -# define EICRx_BIT (~(_BV(ISC40) | _BV(ISC41))) -# define SERIAL_PIN_INTERRUPT INT4_vect -# define EICRx EICRB -# elif SOFT_SERIAL_PIN == E5 -# define EIMSK_BIT _BV(INT5) -# define EICRx_BIT (~(_BV(ISC50) | _BV(ISC51))) -# define SERIAL_PIN_INTERRUPT INT5_vect -# define EICRx EICRB -# elif SOFT_SERIAL_PIN == E6 -# define EIMSK_BIT _BV(INT6) -# define EICRx_BIT (~(_BV(ISC60) | _BV(ISC61))) -# define SERIAL_PIN_INTERRUPT INT6_vect -# define EICRx EICRB -# elif SOFT_SERIAL_PIN == E7 -# define EIMSK_BIT _BV(INT7) -# define EICRx_BIT (~(_BV(ISC70) | _BV(ISC71))) -# define SERIAL_PIN_INTERRUPT INT7_vect -# define EICRx EICRB -# endif -# endif - -# ifndef SERIAL_PIN_INTERRUPT -# error invalid SOFT_SERIAL_PIN value -# 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))) - -# 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 -// ============ Standard setups ============ - -# 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 -# define SLAVE_INT_ACK_WIDTH_UNIT 2 -# define SLAVE_INT_ACK_WIDTH 4 - -inline static void serial_delay(void) ALWAYS_INLINE; -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_half2(void) ALWAYS_INLINE; -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); } - -// 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 uint8_t serial_read_pin(void) ALWAYS_INLINE; -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_high(void) ALWAYS_INLINE; -inline static void serial_high(void) { writePinHigh(SOFT_SERIAL_PIN); } - -void soft_serial_initiator_init(void) { - serial_output(); - serial_high(); -} - -void soft_serial_target_init(void) { - serial_input_with_pullup(); - - // Enable INT0-INT7 - EIMSK |= EIMSK_BIT; - EICRx &= EICRx_BIT; -} - -// 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()) - ; -} - -// 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(); -} - -// Reads a byte from the serial line -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; -} - -// 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; - } else { - serial_low(); - p ^= 0; - } - serial_delay(); - } - /* send parity bit */ - if (p & 1) { - serial_high(); - } else { - serial_low(); - } - serial_delay(); - - 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 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; -} - -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 -} - -static inline uint8_t nibble_bits_count(uint8_t bits) { - bits = (bits & 0x5) + (bits >> 1 & 0x5); - bits = (bits & 0x3) + (bits >> 2 & 0x3); - return bits; -} - -// interrupt handle to be used by the target device -ISR(SERIAL_PIN_INTERRUPT) { - // recive transaction table index - uint8_t tid, bits; - uint8_t pecount = 0; - sync_recv(); - bits = serial_read_chunk(&pecount, 8); - tid = bits >> 3; - bits = (bits & 7) != (nibble_bits_count(tid) & 7); - if (bits || pecount > 0 || tid > NUM_TOTAL_TRANSACTIONS) { - return; - } - serial_delay_half1(); - - serial_high(); // response step1 low->high - serial_output(); - _delay_sub_us(SLAVE_INT_ACK_WIDTH_UNIT * SLAVE_INT_ACK_WIDTH); - split_transaction_desc_t *trans = &split_transaction_table[tid]; - serial_low(); // response step2 ack high->low - - // If the transaction has a callback, we can execute it now - if (trans->slave_callback) { - trans->slave_callback(trans->initiator2target_buffer_size, split_trans_initiator2target_buffer(trans), trans->target2initiator_buffer_size, split_trans_target2initiator_buffer(trans)); - } - - // target send phase - if (trans->target2initiator_buffer_size > 0) serial_send_packet((uint8_t *)split_trans_target2initiator_buffer(trans), 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 *)split_trans_initiator2target_buffer(trans), 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 -} - -///////// -// start transaction by initiator -// -// int soft_serial_transaction(int sstd_index) -// -// Returns: -// TRANSACTION_END -// TRANSACTION_NO_RESPONSE -// TRANSACTION_DATA_ERROR -// this code is very time dependent, so we need to disable interrupts -int soft_serial_transaction(int sstd_index) { - if (sstd_index > NUM_TOTAL_TRANSACTIONS) return TRANSACTION_TYPE_ERROR; - split_transaction_desc_t *trans = &split_transaction_table[sstd_index]; - - if (!trans->status) return TRANSACTION_TYPE_ERROR; // not registered - - cli(); - - // signal to the target that we want to start a transaction - serial_output(); - serial_low(); - _delay_us(SLAVE_INT_WIDTH_US); - - // 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, 8); - 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); - } - - // initiator recive phase - // if the target is present syncronize with it - if (trans->target2initiator_buffer_size > 0) { - if (!serial_recive_packet((uint8_t *)split_trans_target2initiator_buffer(trans), 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 *)split_trans_initiator2target_buffer(trans), trans->initiator2target_buffer_size); - } - - // always, release the line when not in use - sync_send(); - - *trans->status = TRANSACTION_END; - sei(); - return TRANSACTION_END; -} - -int soft_serial_get_and_clean_status(int sstd_index) { - split_transaction_desc_t *trans = &split_transaction_table[sstd_index]; - cli(); - int retval = *trans->status; - *trans->status = 0; - ; - sei(); - return retval; -} -#endif - -// Helix serial.c history -// 2018-1-29 fork from let's split and add PD2, modify sync_recv() (#2308, bceffdefc) -// 2018-6-28 bug fix master to slave comm and speed up (#3255, 1038bbef4) -// (adjusted with avr-gcc 4.9.2) -// 2018-7-13 remove USE_SERIAL_PD2 macro (#3374, f30d6dd78) -// (adjusted with avr-gcc 4.9.2) -// 2018-8-11 add support multi-type transaction (#3608, feb5e4aae) -// (adjusted with avr-gcc 4.9.2) -// 2018-10-21 fix serial and RGB animation conflict (#4191, 4665e4fff) -// (adjusted with avr-gcc 7.3.0) -// 2018-10-28 re-adjust compiler depend value of delay (#4269, 8517f8a66) -// (adjusted with avr-gcc 5.4.0, 7.3.0) -// 2018-12-17 copy to TOP/quantum/split_common/ and remove backward compatibility code (#4669) -- cgit v1.2.3