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Keyboard: Helix serial improvements (#3608)

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* add change_reciver2sender()/change_sender2reciver()

This is a change to improve readability.

* txled, rxled off in matrix_init()

* add serial_send_packet() / serial_recive_packet()

This is a change to reduce object size.

* add serial_low() at ISR() top

* add __attribute__((always_inline)) to some functions

* modify serial_send_packet()/serial_recive_packet()

A little, object size reduction.
A little, speedup.

* add debug code to helix/serial.c

* Adjust sampling timing of serial signal being received

* add split_scomm.c/split_scomm.h and change serial.c/serial.h

serial.c was divided into 2 layers, split_scom.c and serial.c.
The upper layer split_scomm.c is called from matrix.c.
The lower layer serial.c accesses the hardware.

* add split_scomm.c/split_scomm.h into helix/rev1

* reduce object size helix/rev2/matrix.c

* remove checksum check, add parity check

* force occur parity error for test

* parity test ok. remove test code

* change some comment & add skip code when buffer_size == 0

* serial.c: multiple types of transaction support

Add 4 bits transaction-type field at packet top.
Select Transaction Descriptor Table entry by transaction-type.

* helix serial master-slave transaction optimize

Using multi-type transaction feature of serial.c, communication contents between master slaves were optimized.

* add debug code for retry

* add comment into each config.h

* fix ISR status drop

* add a debug macro 'debug_retry_chg()'

* reduce led_test size

* remove debug code from helix/serial.c and etc.

* helix:five_rows change TAPPING_TERM value 140

* Improved compatibility with let's split of serial.c. Finish helix/serial.c improvement.

- The difference with the original let's split's serial.c
  - It's high-speed about 4 times.
  - Stable bi-directional data transfer. (Helix need master to slave transfer)
  - serial.h was divided 2 files, serial_config.h and sereial.h
  - With multiple types of transaction support, communication contents can be optimized. (NEW flexible API)

- USE OLD Simple APIs (compatible with let's split serial.c)
  - files :
    - serial_config.h -- hardware configuration (need include by config.h)
    - serial.c/serial.h -- serial communication

- USE NEW flexible APIs. (Support multi-type transaction function.)
  serial.c was divided into 2 layers, split_scom.c and serial.c.
  The upper layer split_scomm.c is called from matrix.c.
  The lower layer serial.c accesses the hardware.
  - files
    - split_scomm.c -- communication buffer is defined in here. call by matrix.c.
    - split_scomm.h -- buffer size is defined in here. include by matrix.c, split_util.c
    - serial_config.h -- hardware configuration (need include by config.h)
      To use the NEW API, specify #define SERIAL_USE_MULTI_TRANSACTION
    - serial.c/serial.h -- serial communication lower layer

- NEW APIs for serial.c / serial.h (The lower layer)
  // Soft Serial Transaction Descriptor
  typedef struct _SSTD_t  {
      uint8_t *status;
      uint8_t initiator2target_buffer_size;
      uint8_t *initiator2target_buffer;
      uint8_t target2initiator_buffer_size;
      uint8_t *target2initiator_buffer;
  } SSTD_t;

  // initiator is transaction start side
  void soft_serial_initiator_init(SSTD_t *sstd_table);
  // target is interrupt accept side
  void soft_serial_target_init(SSTD_t *sstd_table);
  int soft_serial_transaction(int sstd_index);
  int soft_serial_get_and_clean_target_status(int sstd_index);

- NEW APIs for split_scomm.c / split_scomm.h (The upper layer)
   move from old serial.c the following buffer and functions
     serial_slave_buffer[]
     serial_master_buffer[]
     void serial_master_init(void)
     void serial_slave_init(void)
     int serial_update_buffers(void)
   define SERIAL_xxxxx_BUFFER_LENGTH move from serial_config.h to split_scomm.h
This commit is contained in:
MakotoKurauchi 2018-08-11 00:22:09 +09:00 committed by Drashna Jaelre
parent 90d8ed6c44
commit feb5e4aaeb
19 changed files with 518 additions and 177 deletions
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2
keyboards/helix/rev1/keymaps/OLED_sample/serial_config.h
View file

@ -9,7 +9,7 @@
#define SERIAL_PIN_INTERRUPT INT2_vect
#define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2
#define SERIAL_MASTER_BUFFER_LENGTH 1
#define SERIAL_MASTER_BUFFER_LENGTH 0
//// #error rev1/keymaps/OLED_sample serial config

4
keyboards/helix/rev1/rules.mk
View file

@ -1,4 +1,4 @@
SRC += rev1/matrix.c \
rev1/split_util.c
SRC += rev1/matrix.c
SRC += rev1/split_util.c
BACKLIGHT_ENABLE = no

2
keyboards/helix/rev1/serial_config.h
View file

@ -9,7 +9,7 @@
#define SERIAL_PIN_INTERRUPT INT0_vect
#define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2
#define SERIAL_MASTER_BUFFER_LENGTH 1
#define SERIAL_MASTER_BUFFER_LENGTH 0
/// #error rev1 serial config

3
keyboards/helix/rev2/keymaps/default/config.h
View file

@ -21,6 +21,9 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#ifndef CONFIG_USER_H
#define CONFIG_USER_H
// if you need more program area, try uncomment follow line
//#include "serial_config_simpleapi.h"
// place overrides here
#endif /* CONFIG_USER_H */

3
keyboards/helix/rev2/keymaps/edvorakjp/config.h
View file

@ -1,6 +1,9 @@
#ifndef CONFIG_USER_H
#define CONFIG_USER_H
// if you need more program area, try uncomment follow line
//#include "serial_config_simpleapi.h"
#undef TAPPING_FORCE_HOLD
#undef TAPPING_TERM
#define TAPPING_TERM 120

6
keyboards/helix/rev2/keymaps/five_rows/config.h
View file

@ -21,6 +21,12 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#ifndef CONFIG_USER_H
#define CONFIG_USER_H
// if you need more program area, try uncomment follow line
//#include "serial_config_simpleapi.h"
#undef TAPPING_TERM
#define TAPPING_TERM 140
// place overrides here
#endif /* CONFIG_USER_H */

3
keyboards/helix/rev2/keymaps/five_rows_jis/config.h
View file

@ -23,6 +23,9 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
// place overrides here
// if you need more program area, try uncomment follow line
//#include "serial_config_simpleapi.h"
#ifdef MOUSEKEY_ENABLE
#undef MOUSEKEY_INTERVAL
#define MOUSEKEY_INTERVAL 0

3
keyboards/helix/rev2/keymaps/froggy/config.h
View file

@ -21,6 +21,9 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#ifndef CONFIG_USER_H
#define CONFIG_USER_H
// if you need more program area, try uncomment follow line
//#include "serial_config_simpleapi.h"
#undef TAPPING_TERM
#define TAPPING_TERM 200
#define ONESHOT_TAP_TOGGLE 5 /* Tapping this number of times holds the key until tapped this number of times again. */

3
keyboards/helix/rev2/keymaps/led_test/config.h
View file

@ -21,6 +21,9 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#ifndef CONFIG_USER_H
#define CONFIG_USER_H
// if you need more program area, try uncomment follow line
#include "serial_config_simpleapi.h"
// place overrides here
#endif /* CONFIG_USER_H */

58
keyboards/helix/rev2/matrix.c
View file

@ -20,6 +20,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <avr/io.h>
#include <avr/wdt.h>
#include <avr/interrupt.h>
@ -34,7 +35,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#ifdef USE_MATRIX_I2C
# include "i2c.h"
#else // USE_SERIAL
# include "serial.h"
# include "split_scomm.h"
#endif
#ifndef DEBOUNCE
@ -102,6 +103,8 @@ void matrix_init(void)
init_cols();
TX_RX_LED_INIT;
TXLED0;
RXLED0;
// initialize matrix state: all keys off
for (uint8_t i=0; i < MATRIX_ROWS; i++) {
@ -178,17 +181,20 @@ i2c_error: // the cable is disconnceted, or something else went wrong
#else // USE_SERIAL
int serial_transaction(void) {
int serial_transaction(int master_changed) {
int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
#ifdef SERIAL_USE_MULTI_TRANSACTION
int ret=serial_update_buffers(master_changed);
#else
int ret=serial_update_buffers();
#endif
if (ret ) {
if(ret==2)RXLED1;
if(ret==2) RXLED1;
return 1;
}
RXLED0;
for (int i = 0; i < ROWS_PER_HAND; ++i) {
matrix[slaveOffset+i] = serial_slave_buffer[i];
}
RXLED0;
memcpy(&matrix[slaveOffset],
(void *)serial_slave_buffer, sizeof(serial_slave_buffer));
return 0;
}
#endif
@ -199,19 +205,9 @@ uint8_t matrix_scan(void)
matrix_master_scan();
}else{
matrix_slave_scan();
// if(serial_slave_DATA_CORRUPT()){
// TXLED0;
int offset = (isLeftHand) ? ROWS_PER_HAND : 0;
for (int i = 0; i < ROWS_PER_HAND; ++i) {
matrix[offset+i] = serial_master_buffer[i];
}
// }else{
// TXLED1;
// }
int offset = (isLeftHand) ? ROWS_PER_HAND : 0;
memcpy(&matrix[offset],
(void *)serial_master_buffer, sizeof(serial_master_buffer));
matrix_scan_quantum();
}
return 1;
@ -221,6 +217,7 @@ uint8_t matrix_scan(void)
uint8_t matrix_master_scan(void) {
int ret = _matrix_scan();
int mchanged = 1;
#ifndef KEYBOARD_helix_rev1
int offset = (isLeftHand) ? 0 : ROWS_PER_HAND;
@ -231,16 +228,19 @@ uint8_t matrix_master_scan(void) {
// i2c_slave_buffer[i] = matrix[offset+i];
// }
#else // USE_SERIAL
for (int i = 0; i < ROWS_PER_HAND; ++i) {
serial_master_buffer[i] = matrix[offset+i];
}
#ifdef SERIAL_USE_MULTI_TRANSACTION
mchanged = memcmp((void *)serial_master_buffer,
&matrix[offset], sizeof(serial_master_buffer));
#endif
memcpy((void *)serial_master_buffer,
&matrix[offset], sizeof(serial_master_buffer));
#endif
#endif
#ifdef USE_MATRIX_I2C
if( i2c_transaction() ) {
#else // USE_SERIAL
if( serial_transaction() ) {
if( serial_transaction(mchanged) ) {
#endif
// turn on the indicator led when halves are disconnected
TXLED1;
@ -274,9 +274,19 @@ void matrix_slave_scan(void) {
i2c_slave_buffer[i] = matrix[offset+i];
}
#else // USE_SERIAL
#ifdef SERIAL_USE_MULTI_TRANSACTION
int change = 0;
#endif
for (int i = 0; i < ROWS_PER_HAND; ++i) {
#ifdef SERIAL_USE_MULTI_TRANSACTION
if( serial_slave_buffer[i] != matrix[offset+i] )
change = 1;
#endif
serial_slave_buffer[i] = matrix[offset+i];
}
#ifdef SERIAL_USE_MULTI_TRANSACTION
slave_buffer_change_count += change;
#endif
#endif
}

7
keyboards/helix/rev2/rules.mk
View file

@ -1,3 +1,4 @@
SRC += rev2/matrix.c \
rev2/split_util.c \
ws2812.c
SRC += rev2/matrix.c
SRC += rev2/split_util.c
SRC += rev2/split_scomm.c
SRC += ws2812.c

3
keyboards/helix/rev2/serial_config.h
View file

@ -8,8 +8,7 @@
#define SERIAL_PIN_MASK _BV(PD2)
#define SERIAL_PIN_INTERRUPT INT2_vect
#define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2
#define SERIAL_MASTER_BUFFER_LENGTH MATRIX_ROWS/2
#define SERIAL_USE_MULTI_TRANSACTION
//// #error rev2 serial config

8
keyboards/helix/rev2/serial_config_simpleapi.h Normal file
View file

@ -0,0 +1,8 @@
#ifndef SERIAL_CONFIG_SIMPLEAPI_H
#define SERIAL_CONFIG_SIMPLEAPI_H
#undef SERIAL_USE_MULTI_TRANSACTION
#define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2
#define SERIAL_MASTER_BUFFER_LENGTH MATRIX_ROWS/2
#endif // SERIAL_CONFIG_SIMPLEAPI_H

73
keyboards/helix/rev2/split_scomm.c Normal file
View file

@ -0,0 +1,73 @@
#ifdef USE_SERIAL
#ifdef SERIAL_USE_MULTI_TRANSACTION
/* --- USE flexible API (using multi-type transaction function) --- */
#include <stdbool.h>
#include <stdint.h>
#include <stddef.h>
#include <split_scomm.h>
#include "serial.h"
#ifdef SERIAL_DEBUG_MODE
#include <avr/io.h>
#endif
uint8_t volatile serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH] = {0};
uint8_t volatile serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH] = {0};
uint8_t volatile status_com = 0;
uint8_t volatile status1 = 0;
uint8_t slave_buffer_change_count = 0;
uint8_t s_change_old = 0xff;
SSTD_t transactions[] = {
#define GET_SLAVE_STATUS 0
/* master buffer not changed, only recive slave_buffer_change_count */
{ (uint8_t *)&status_com,
0, NULL,
sizeof(slave_buffer_change_count), &slave_buffer_change_count,
},
#define PUT_MASTER_GET_SLAVE_STATUS 1
/* master buffer changed need send, and recive slave_buffer_change_count */
{ (uint8_t *)&status_com,
sizeof(serial_master_buffer), (uint8_t *)serial_master_buffer,
sizeof(slave_buffer_change_count), &slave_buffer_change_count,
},
#define GET_SLAVE_BUFFER 2
/* recive serial_slave_buffer */
{ (uint8_t *)&status1,
0, NULL,
sizeof(serial_slave_buffer), (uint8_t *)serial_slave_buffer
}
};
void serial_master_init(void)
{
soft_serial_initiator_init(transactions);
}
void serial_slave_init(void)
{
soft_serial_target_init(transactions);
}
// 0 => no error
// 1 => slave did not respond
// 2 => checksum error
int serial_update_buffers(int master_update)
{
int status;
static int need_retry = 0;
if( s_change_old != slave_buffer_change_count ) {
status = soft_serial_transaction(GET_SLAVE_BUFFER);
if( status == TRANSACTION_END )
s_change_old = slave_buffer_change_count;
}
if( !master_update && !need_retry)
status = soft_serial_transaction(GET_SLAVE_STATUS);
else
status = soft_serial_transaction(PUT_MASTER_GET_SLAVE_STATUS);
need_retry = ( status == TRANSACTION_END ) ? 0 : 1;
return status;
}
#endif // SERIAL_USE_MULTI_TRANSACTION
#endif /* USE_SERIAL */

24
keyboards/helix/rev2/split_scomm.h Normal file
View file

@ -0,0 +1,24 @@
#ifndef SPLIT_COMM_H
#define SPLIT_COMM_H
#ifndef SERIAL_USE_MULTI_TRANSACTION
/* --- USE Simple API (OLD API, compatible with let's split serial.c) --- */
#include "serial.h"
#else
/* --- USE flexible API (using multi-type transaction function) --- */
// Buffers for master - slave communication
#define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2
#define SERIAL_MASTER_BUFFER_LENGTH MATRIX_ROWS/2
extern volatile uint8_t serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH];
extern volatile uint8_t serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH];
extern uint8_t slave_buffer_change_count;
void serial_master_init(void);
void serial_slave_init(void);
int serial_update_buffers(int master_changed);
#endif
#endif /* SPLIT_COMM_H */

2
keyboards/helix/rev2/split_util.c
View file

@ -11,7 +11,7 @@
#ifdef USE_MATRIX_I2C
# include "i2c.h"
#else
# include "serial.h"
# include "split_scomm.h"
#endif
volatile bool isLeftHand = true;

9
keyboards/helix/rules.mk
View file

@ -1,6 +1,9 @@
SRC += i2c.c \
serial.c \
ssd1306.c
SRC += i2c.c
SRC += serial.c
SRC += ssd1306.c
# if firmware size over limit, try this option
# CFLAGS += -flto
# MCU name
#MCU = at90usb1287

419
keyboards/helix/serial.c
View file

@ -9,40 +9,85 @@
#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include <stddef.h>
#include <stdbool.h>
#include "serial.h"
//#include <pro_micro.h>
#ifdef USE_SERIAL
#ifndef SERIAL_USE_MULTI_TRANSACTION
/* --- USE Simple API (OLD API, compatible with let's split serial.c) */
#if SERIAL_SLAVE_BUFFER_LENGTH > 0
uint8_t volatile serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH] = {0};
#endif
#if SERIAL_MASTER_BUFFER_LENGTH > 0
uint8_t volatile serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH] = {0};
#endif
uint8_t volatile status0 = 0;
SSTD_t transactions[] = {
{ (uint8_t *)&status0,
#if SERIAL_MASTER_BUFFER_LENGTH > 0
sizeof(serial_master_buffer), (uint8_t *)serial_master_buffer,
#else
0, (uint8_t *)NULL,
#endif
#if SERIAL_SLAVE_BUFFER_LENGTH > 0
sizeof(serial_slave_buffer), (uint8_t *)serial_slave_buffer
#else
0, (uint8_t *)NULL,
#endif
}
};
void serial_master_init(void)
{ soft_serial_initiator_init(transactions); }
void serial_slave_init(void)
{ soft_serial_target_init(transactions); }
// 0 => no error
// 1 => slave did not respond
// 2 => checksum error
int serial_update_buffers()
{ return soft_serial_transaction(); }
#endif // Simple API (OLD API, compatible with let's split serial.c)
#define ALWAYS_INLINE __attribute__((always_inline))
#define NO_INLINE __attribute__((noinline))
#define _delay_sub_us(x) __builtin_avr_delay_cycles(x)
// Serial pulse period in microseconds.
#define TID_SEND_ADJUST 14
#define SELECT_SERIAL_SPEED 1
#if SELECT_SERIAL_SPEED == 0
// Very High speed
#define SERIAL_DELAY 4 // micro sec
#define READ_WRITE_START_ADJUST 30 // cycles
#define READ_WRITE_WIDTH_ADJUST 10 // cycles
#define READ_WRITE_START_ADJUST 33 // cycles
#define READ_WRITE_WIDTH_ADJUST 3 // cycles
#elif SELECT_SERIAL_SPEED == 1
// High speed
#define SERIAL_DELAY 6 // micro sec
#define READ_WRITE_START_ADJUST 23 // cycles
#define READ_WRITE_WIDTH_ADJUST 10 // cycles
#define READ_WRITE_START_ADJUST 30 // cycles
#define READ_WRITE_WIDTH_ADJUST 3 // cycles
#elif SELECT_SERIAL_SPEED == 2
// Middle speed
#define SERIAL_DELAY 12 // micro sec
#define READ_WRITE_START_ADJUST 25 // cycles
#define READ_WRITE_WIDTH_ADJUST 10 // cycles
#define READ_WRITE_START_ADJUST 30 // cycles
#define READ_WRITE_WIDTH_ADJUST 3 // cycles
#elif SELECT_SERIAL_SPEED == 3
// Low speed
#define SERIAL_DELAY 24 // micro sec
#define READ_WRITE_START_ADJUST 25 // cycles
#define READ_WRITE_WIDTH_ADJUST 10 // cycles
#define READ_WRITE_START_ADJUST 30 // cycles
#define READ_WRITE_WIDTH_ADJUST 3 // cycles
#elif SELECT_SERIAL_SPEED == 4
// Very Low speed
#define SERIAL_DELAY 50 // micro sec
#define READ_WRITE_START_ADJUST 25 // cycles
#define READ_WRITE_WIDTH_ADJUST 10 // cycles
#define READ_WRITE_START_ADJUST 30 // cycles
#define READ_WRITE_WIDTH_ADJUST 3 // cycles
#else
#error Illegal Serial Speed
#endif
@ -51,14 +96,15 @@
#define SERIAL_DELAY_HALF1 (SERIAL_DELAY/2)
#define SERIAL_DELAY_HALF2 (SERIAL_DELAY - SERIAL_DELAY/2)
#define SLAVE_INT_WIDTH 1
#define SLAVE_INT_RESPONSE_TIME SERIAL_DELAY
#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
uint8_t volatile serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH] = {0};
uint8_t volatile serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH] = {0};
#define SLAVE_DATA_CORRUPT (1<<0)
volatile uint8_t status = 0;
static SSTD_t *Transaction_table = NULL;
inline static
void serial_delay(void) {
@ -75,12 +121,14 @@ void serial_delay_half2(void) {
_delay_us(SERIAL_DELAY_HALF2);
}
inline static void serial_output(void) ALWAYS_INLINE;
inline static
void serial_output(void) {
SERIAL_PIN_DDR |= SERIAL_PIN_MASK;
}
// 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) {
SERIAL_PIN_DDR &= ~SERIAL_PIN_MASK;
@ -92,50 +140,58 @@ uint8_t serial_read_pin(void) {
return !!(SERIAL_PIN_INPUT & SERIAL_PIN_MASK);
}
inline static void serial_low(void) ALWAYS_INLINE;
inline static
void serial_low(void) {
SERIAL_PIN_PORT &= ~SERIAL_PIN_MASK;
}
inline static void serial_high(void) ALWAYS_INLINE;
inline static
void serial_high(void) {
SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
}
void serial_master_init(void) {
serial_output();
serial_high();
void soft_serial_initiator_init(SSTD_t *sstd_table)
{
Transaction_table = sstd_table;
serial_output();
serial_high();
}
void serial_slave_init(void) {
serial_input_with_pullup();
void soft_serial_target_init(SSTD_t *sstd_table)
{
Transaction_table = sstd_table;
serial_input_with_pullup();
#if SERIAL_PIN_MASK == _BV(PD0)
// Enable INT0
EIMSK |= _BV(INT0);
// Trigger on falling edge of INT0
EICRA &= ~(_BV(ISC00) | _BV(ISC01));
// Enable INT0
EIMSK |= _BV(INT0);
// Trigger on falling edge of INT0
EICRA &= ~(_BV(ISC00) | _BV(ISC01));
#elif SERIAL_PIN_MASK == _BV(PD2)
// Enable INT2
EIMSK |= _BV(INT2);
// Trigger on falling edge of INT2
EICRA &= ~(_BV(ISC20) | _BV(ISC21));
// Enable INT2
EIMSK |= _BV(INT2);
// Trigger on falling edge of INT2
EICRA &= ~(_BV(ISC20) | _BV(ISC21));
#else
#error unknown SERIAL_PIN_MASK value
#endif
}
// Used by the sender to synchronize timing with the reciver.
static void sync_recv(void) NO_INLINE;
static
void sync_recv(void) {
for (int i = 0; i < SERIAL_DELAY*5 && serial_read_pin(); i++ ) {
for (uint8_t i = 0; i < SERIAL_DELAY*5 && serial_read_pin(); i++ ) {
}
// This shouldn't hang if the slave disconnects because the
// serial line will float to high if the slave does disconnect.
// 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();
@ -144,152 +200,245 @@ void sync_send(void) {
}
// Reads a byte from the serial line
static
uint8_t serial_read_byte(void) {
uint8_t byte = 0;
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 ( uint8_t i = 0; i < 8; ++i) {
serial_delay_half1(); // read the middle of pulses
byte = (byte << 1) | serial_read_pin();
_delay_sub_us(READ_WRITE_WIDTH_ADJUST);
serial_delay_half2();
for( i = 0, byte = 0, p = 0; 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
static
void serial_write_byte(uint8_t data) {
uint8_t b = 1<<7;
while( b ) {
if(data & b) {
serial_high();
} else {
serial_low();
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 = 0, b = 1<<(bit-1); b ; b >>= 1) {
if(data & b) {
serial_high(); p ^= 1;
} else {
serial_low(); p ^= 0;
}
serial_delay();
}
b >>= 1;
/* send parity bit */
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
}
// interrupt handle to be used by the slave device
ISR(SERIAL_PIN_INTERRUPT) {
serial_output();
// slave send phase
uint8_t checksum = 0;
for (int i = 0; i < SERIAL_SLAVE_BUFFER_LENGTH; ++i) {
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_byte(serial_slave_buffer[i]);
checksum += serial_slave_buffer[i];
serial_write_chunk(data,8);
}
sync_send();
serial_write_byte(checksum);
}
// slave switch to input
sync_send(); //0
serial_delay_half1(); //1
serial_low(); //2
serial_input_with_pullup(); //2
serial_delay_half1(); //3
// slave recive phase
uint8_t checksum_computed = 0;
for (int i = 0; i < SERIAL_MASTER_BUFFER_LENGTH; ++i) {
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();
serial_master_buffer[i] = serial_read_byte();
checksum_computed += serial_master_buffer[i];
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
}
// 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;
uint8_t pecount = 0;
sync_recv();
uint8_t checksum_received = serial_read_byte();
tid = serial_read_chunk(&pecount,4);
if(pecount> 0)
return;
serial_delay_half1();
if ( checksum_computed != checksum_received ) {
status |= SLAVE_DATA_CORRUPT;
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 {
status &= ~SLAVE_DATA_CORRUPT;
*trans->status = TRANSACTION_ACCEPTED;
}
sync_recv(); //weit master output to high
sync_recv(); //weit initiator output to high
}
inline
bool serial_slave_DATA_CORRUPT(void) {
return status & SLAVE_DATA_CORRUPT;
}
// Copies the serial_slave_buffer to the master and sends the
// serial_master_buffer to the slave.
/////////
// start transaction by initiator
//
// int soft_serial_transaction(int sstd_index)
//
// Returns:
// 0 => no error
// 1 => slave did not respond
// 2 => checksum error
int serial_update_buffers(void) {
// this code is very time dependent, so we need to disable interrupts
// TRANSACTION_END
// 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) {
SSTD_t *trans = &Transaction_table[sstd_index];
#endif
cli();
// signal to the slave that we want to start a transaction
// signal to the target that we want to start a transaction
serial_output();
serial_low();
_delay_us(SLAVE_INT_WIDTH);
_delay_us(SLAVE_INT_WIDTH_US);
// wait for the slaves response
#ifndef SERIAL_USE_MULTI_TRANSACTION
// wait for the target response
serial_input_with_pullup();
_delay_us(SLAVE_INT_RESPONSE_TIME);
// check if the slave is present
// check if the target is present
if (serial_read_pin()) {
// slave failed to pull the line low, assume not present
// target failed to pull the line low, assume not present
serial_output();
serial_high();
*trans->status = TRANSACTION_NO_RESPONSE;
sei();
return 1;
return TRANSACTION_NO_RESPONSE;
}
// master recive phase
// if the slave is present syncronize with it
uint8_t checksum_computed = 0;
// receive data from the slave
for (int i = 0; i < SERIAL_SLAVE_BUFFER_LENGTH; ++i) {
sync_recv();
serial_slave_buffer[i] = serial_read_byte();
checksum_computed += serial_slave_buffer[i];
}
sync_recv();
uint8_t checksum_received = serial_read_byte();
if (checksum_computed != checksum_received) {
serial_output();
serial_high();
sei();
return 2;
}
// master switch to output
sync_recv(); //0
serial_delay(); //1
serial_low(); //3
serial_output(); // 3
serial_delay_half1(); //4
// master send phase
uint8_t checksum = 0;
for (int i = 0; i < SERIAL_MASTER_BUFFER_LENGTH; ++i) {
sync_send();
serial_write_byte(serial_master_buffer[i]);
checksum += serial_master_buffer[i];
}
#else
// send transaction table index
sync_send();
serial_write_byte(checksum);
_delay_sub_us(TID_SEND_ADJUST);
serial_write_chunk(sstd_index, 4);
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);
}
// always, release the line when not in use
sync_send();
*trans->status = TRANSACTION_END;
sei();
return 0;
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];
cli();
int retval = *trans->status;
*trans->status = 0;;
sei();
return retval;
}
#endif
#endif

63
keyboards/helix/serial.h
View file

@ -3,25 +3,78 @@
#include <stdbool.h>
// ////////////////////////////////////////////
// /////////////////////////////////////////////////////////////////
// Need Soft Serial defines in serial_config.h
// ////////////////////////////////////////////
// /////////////////////////////////////////////////////////////////
// ex.
// #define SERIAL_PIN_DDR DDRD
// #define SERIAL_PIN_PORT PORTD
// #define SERIAL_PIN_INPUT PIND
// #define SERIAL_PIN_MASK _BV(PD?) ?=0,2
// #define SERIAL_PIN_INTERRUPT INT?_vect ?=0,2
//
// //// USE Simple API (OLD API, compatible with let's split serial.c)
// ex.
// #define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2
// #define SERIAL_MASTER_BUFFER_LENGTH MATRIX_ROWS/2
// #define SERIAL_MASTER_BUFFER_LENGTH 1
//
// //// USE flexible API (using multi-type transaction function)
// #define SERIAL_USE_MULTI_TRANSACTION
//
// /////////////////////////////////////////////////////////////////
// Buffers for master - slave communication
#ifndef SERIAL_USE_MULTI_TRANSACTION
/* --- USE Simple API (OLD API, compatible with let's split serial.c) */
#if SERIAL_SLAVE_BUFFER_LENGTH > 0
extern volatile uint8_t serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH];
#endif
#if SERIAL_MASTER_BUFFER_LENGTH > 0
extern volatile uint8_t serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH];
#endif
void serial_master_init(void);
void serial_slave_init(void);
int serial_update_buffers(void);
bool serial_slave_data_corrupt(void);
#endif // USE Simple API
// Soft Serial Transaction Descriptor
typedef struct _SSTD_t {
uint8_t *status;
uint8_t initiator2target_buffer_size;
uint8_t *initiator2target_buffer;
uint8_t target2initiator_buffer_size;
uint8_t *target2initiator_buffer;
} SSTD_t;
// initiator is transaction start side
void soft_serial_initiator_init(SSTD_t *sstd_table);
// target is interrupt accept side
void soft_serial_target_init(SSTD_t *sstd_table);
// initiator resullt
#define TRANSACTION_END 0
#define TRANSACTION_NO_RESPONSE 0x1
#define TRANSACTION_DATA_ERROR 0x2
#ifndef SERIAL_USE_MULTI_TRANSACTION
int soft_serial_transaction(void);
#else
int soft_serial_transaction(int sstd_index);
#endif
// target status
// *SSTD_t.status has
// initiator:
// TRANSACTION_END
// or TRANSACTION_NO_RESPONSE
// or TRANSACTION_DATA_ERROR
// target:
// TRANSACTION_DATA_ERROR
// or TRANSACTION_ACCEPTED
#define TRANSACTION_ACCEPTED 0x4
#ifdef SERIAL_USE_MULTI_TRANSACTION
int soft_serial_get_and_clean_status(int sstd_index);
#endif
#endif /* SOFT_SERIAL_H */