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@@ -1,589 +0,0 @@
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-
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- * WARNING: be careful changing this code, it is very timing dependent
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- *
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- * 2018-10-28 checked
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- * avr-gcc 4.9.2
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- * avr-gcc 5.4.0
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- * avr-gcc 7.3.0
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- */
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-
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-#ifndef F_CPU
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-#define F_CPU 16000000
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-#endif
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-
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-#include <avr/io.h>
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-#include <avr/interrupt.h>
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-#include <util/delay.h>
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-#include <stddef.h>
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-#include <stdbool.h>
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-#include "serial.h"
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-
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-#ifdef SOFT_SERIAL_PIN
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-
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-#ifdef __AVR_ATmega32U4__
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-
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- #ifdef USE_I2C
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- #if SOFT_SERIAL_PIN == D0 || SOFT_SERIAL_PIN == D1
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- #error Using ATmega32U4 I2C, so can not use PD0, PD1
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- #endif
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- #endif
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-
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- #if SOFT_SERIAL_PIN >= D0 && SOFT_SERIAL_PIN <= D3
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- #define SERIAL_PIN_DDR DDRD
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- #define SERIAL_PIN_PORT PORTD
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- #define SERIAL_PIN_INPUT PIND
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- #if SOFT_SERIAL_PIN == D0
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- #define SERIAL_PIN_MASK _BV(PD0)
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- #define EIMSK_BIT _BV(INT0)
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- #define EICRx_BIT (~(_BV(ISC00) | _BV(ISC01)))
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- #define SERIAL_PIN_INTERRUPT INT0_vect
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- #elif SOFT_SERIAL_PIN == D1
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- #define SERIAL_PIN_MASK _BV(PD1)
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- #define EIMSK_BIT _BV(INT1)
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- #define EICRx_BIT (~(_BV(ISC10) | _BV(ISC11)))
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- #define SERIAL_PIN_INTERRUPT INT1_vect
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- #elif SOFT_SERIAL_PIN == D2
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- #define SERIAL_PIN_MASK _BV(PD2)
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- #define EIMSK_BIT _BV(INT2)
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- #define EICRx_BIT (~(_BV(ISC20) | _BV(ISC21)))
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- #define SERIAL_PIN_INTERRUPT INT2_vect
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- #elif SOFT_SERIAL_PIN == D3
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- #define SERIAL_PIN_MASK _BV(PD3)
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- #define EIMSK_BIT _BV(INT3)
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- #define EICRx_BIT (~(_BV(ISC30) | _BV(ISC31)))
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- #define SERIAL_PIN_INTERRUPT INT3_vect
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- #endif
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- #elif SOFT_SERIAL_PIN == E6
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- #define SERIAL_PIN_DDR DDRE
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- #define SERIAL_PIN_PORT PORTE
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- #define SERIAL_PIN_INPUT PINE
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- #define SERIAL_PIN_MASK _BV(PE6)
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- #define EIMSK_BIT _BV(INT6)
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- #define EICRx_BIT (~(_BV(ISC60) | _BV(ISC61)))
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- #define SERIAL_PIN_INTERRUPT INT6_vect
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- #else
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- #error invalid SOFT_SERIAL_PIN value
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- #endif
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-
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-#else
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- #error serial.c now support ATmega32U4 only
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-#endif
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-
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-
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-#if !defined(SERIAL_USE_SINGLE_TRANSACTION) && !defined(SERIAL_USE_MULTI_TRANSACTION)
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-
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- #if SERIAL_SLAVE_BUFFER_LENGTH > 0
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- uint8_t volatile serial_slave_buffer[SERIAL_SLAVE_BUFFER_LENGTH] = {0};
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- #endif
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- #if SERIAL_MASTER_BUFFER_LENGTH > 0
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- uint8_t volatile serial_master_buffer[SERIAL_MASTER_BUFFER_LENGTH] = {0};
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- #endif
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- uint8_t volatile status0 = 0;
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-
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-SSTD_t transactions[] = {
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- { (uint8_t *)&status0,
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- #if SERIAL_MASTER_BUFFER_LENGTH > 0
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- sizeof(serial_master_buffer), (uint8_t *)serial_master_buffer,
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- #else
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- 0, (uint8_t *)NULL,
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- #endif
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- #if SERIAL_SLAVE_BUFFER_LENGTH > 0
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- sizeof(serial_slave_buffer), (uint8_t *)serial_slave_buffer
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- #else
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- 0, (uint8_t *)NULL,
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- #endif
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- }
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-};
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-
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-void serial_master_init(void)
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-{ soft_serial_initiator_init(transactions, TID_LIMIT(transactions)); }
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-
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-void serial_slave_init(void)
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-{ soft_serial_target_init(transactions, TID_LIMIT(transactions)); }
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-
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-
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-
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-
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-int serial_update_buffers()
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-{
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- int result;
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- result = soft_serial_transaction();
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- return result;
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-}
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-
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-#endif
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-
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-
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-#define ALWAYS_INLINE __attribute__((always_inline))
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-#define NO_INLINE __attribute__((noinline))
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-#define _delay_sub_us(x) __builtin_avr_delay_cycles(x)
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-
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-
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-#define ODD_PARITY 1
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-#define EVEN_PARITY 0
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-#define PARITY EVEN_PARITY
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-
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-#ifdef SERIAL_DELAY
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-
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-
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-
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-
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-
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-#else
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-
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-
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-#ifndef SELECT_SOFT_SERIAL_SPEED
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-#define SELECT_SOFT_SERIAL_SPEED 1
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-
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-
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-
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-
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-
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-
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-#endif
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-
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-#if __GNUC__ < 6
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- #define TID_SEND_ADJUST 14
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-#else
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- #define TID_SEND_ADJUST 2
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-#endif
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-
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-#if SELECT_SOFT_SERIAL_SPEED == 0
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-
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- #define SERIAL_DELAY 4
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- #if __GNUC__ < 6
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- #define READ_WRITE_START_ADJUST 33
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- #define READ_WRITE_WIDTH_ADJUST 3
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- #else
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- #define READ_WRITE_START_ADJUST 34
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- #define READ_WRITE_WIDTH_ADJUST 7
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- #endif
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-#elif SELECT_SOFT_SERIAL_SPEED == 1
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-
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- #define SERIAL_DELAY 6
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- #if __GNUC__ < 6
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- #define READ_WRITE_START_ADJUST 30
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- #define READ_WRITE_WIDTH_ADJUST 3
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- #else
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- #define READ_WRITE_START_ADJUST 33
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- #define READ_WRITE_WIDTH_ADJUST 7
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- #endif
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-#elif SELECT_SOFT_SERIAL_SPEED == 2
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-
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- #define SERIAL_DELAY 12
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- #define READ_WRITE_START_ADJUST 30
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- #if __GNUC__ < 6
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- #define READ_WRITE_WIDTH_ADJUST 3
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- #else
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- #define READ_WRITE_WIDTH_ADJUST 7
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- #endif
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-#elif SELECT_SOFT_SERIAL_SPEED == 3
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-
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- #define SERIAL_DELAY 24
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- #define READ_WRITE_START_ADJUST 30
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- #if __GNUC__ < 6
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- #define READ_WRITE_WIDTH_ADJUST 3
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- #else
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- #define READ_WRITE_WIDTH_ADJUST 7
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- #endif
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-#elif SELECT_SOFT_SERIAL_SPEED == 4
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-
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- #define SERIAL_DELAY 36
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- #define READ_WRITE_START_ADJUST 30
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- #if __GNUC__ < 6
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- #define READ_WRITE_WIDTH_ADJUST 3
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- #else
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- #define READ_WRITE_WIDTH_ADJUST 7
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- #endif
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-#elif SELECT_SOFT_SERIAL_SPEED == 5
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-
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- #define SERIAL_DELAY 48
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- #define READ_WRITE_START_ADJUST 30
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- #if __GNUC__ < 6
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- #define READ_WRITE_WIDTH_ADJUST 3
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- #else
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- #define READ_WRITE_WIDTH_ADJUST 7
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- #endif
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-#else
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-#error invalid SELECT_SOFT_SERIAL_SPEED value
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-#endif
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-#endif
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-
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-#define SERIAL_DELAY_HALF1 (SERIAL_DELAY/2)
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-#define SERIAL_DELAY_HALF2 (SERIAL_DELAY - SERIAL_DELAY/2)
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-
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-#define SLAVE_INT_WIDTH_US 1
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-#ifndef SERIAL_USE_MULTI_TRANSACTION
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- #define SLAVE_INT_RESPONSE_TIME SERIAL_DELAY
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-#else
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- #define SLAVE_INT_ACK_WIDTH_UNIT 2
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- #define SLAVE_INT_ACK_WIDTH 4
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-#endif
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-
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-static SSTD_t *Transaction_table = NULL;
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-static uint8_t Transaction_table_size = 0;
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-
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-inline static void serial_delay(void) ALWAYS_INLINE;
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-inline static
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-void serial_delay(void) {
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- _delay_us(SERIAL_DELAY);
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-}
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-
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-inline static void serial_delay_half1(void) ALWAYS_INLINE;
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-inline static
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-void serial_delay_half1(void) {
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- _delay_us(SERIAL_DELAY_HALF1);
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-}
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-
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-inline static void serial_delay_half2(void) ALWAYS_INLINE;
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-inline static
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-void serial_delay_half2(void) {
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- _delay_us(SERIAL_DELAY_HALF2);
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-}
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-
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-inline static void serial_output(void) ALWAYS_INLINE;
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-inline static
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-void serial_output(void) {
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- SERIAL_PIN_DDR |= SERIAL_PIN_MASK;
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-}
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-
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-
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-inline static void serial_input_with_pullup(void) ALWAYS_INLINE;
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-inline static
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-void serial_input_with_pullup(void) {
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- SERIAL_PIN_DDR &= ~SERIAL_PIN_MASK;
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- SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
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-}
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-
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-inline static uint8_t serial_read_pin(void) ALWAYS_INLINE;
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-inline static
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-uint8_t serial_read_pin(void) {
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- return !!(SERIAL_PIN_INPUT & SERIAL_PIN_MASK);
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-}
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-
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-inline static void serial_low(void) ALWAYS_INLINE;
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-inline static
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-void serial_low(void) {
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- SERIAL_PIN_PORT &= ~SERIAL_PIN_MASK;
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-}
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-
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-inline static void serial_high(void) ALWAYS_INLINE;
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-inline static
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-void serial_high(void) {
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- SERIAL_PIN_PORT |= SERIAL_PIN_MASK;
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-}
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-
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-void soft_serial_initiator_init(SSTD_t *sstd_table, int sstd_table_size)
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-{
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- Transaction_table = sstd_table;
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- Transaction_table_size = (uint8_t)sstd_table_size;
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- serial_output();
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- serial_high();
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-}
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-
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-void soft_serial_target_init(SSTD_t *sstd_table, int sstd_table_size)
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-{
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- Transaction_table = sstd_table;
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- Transaction_table_size = (uint8_t)sstd_table_size;
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- serial_input_with_pullup();
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-
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-
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- EIMSK |= EIMSK_BIT;
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-#if SERIAL_PIN_MASK == _BV(PE6)
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-
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- EICRB &= EICRx_BIT;
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-#else
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-
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- EICRA &= EICRx_BIT;
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-#endif
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-}
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-
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-
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-static void sync_recv(void) NO_INLINE;
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-static
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-void sync_recv(void) {
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- for (uint8_t i = 0; i < SERIAL_DELAY*5 && serial_read_pin(); i++ ) {
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- }
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-
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-
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- while (!serial_read_pin());
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-}
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-
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-
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-static void sync_send(void) NO_INLINE;
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-static
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-void sync_send(void) {
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- serial_low();
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- serial_delay();
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- serial_high();
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-}
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-
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-
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-static uint8_t serial_read_chunk(uint8_t *pterrcount, uint8_t bit) NO_INLINE;
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-static uint8_t serial_read_chunk(uint8_t *pterrcount, uint8_t bit) {
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- uint8_t byte, i, p, pb;
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-
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- _delay_sub_us(READ_WRITE_START_ADJUST);
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- for( i = 0, byte = 0, p = PARITY; i < bit; i++ ) {
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- serial_delay_half1();
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- if( serial_read_pin() ) {
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- byte = (byte << 1) | 1; p ^= 1;
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- } else {
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- byte = (byte << 1) | 0; p ^= 0;
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- }
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- _delay_sub_us(READ_WRITE_WIDTH_ADJUST);
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- serial_delay_half2();
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- }
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-
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- serial_delay_half1();
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- pb = serial_read_pin();
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- _delay_sub_us(READ_WRITE_WIDTH_ADJUST);
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- serial_delay_half2();
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-
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- *pterrcount += (p != pb)? 1 : 0;
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-
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- return byte;
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-}
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-
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-
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-void serial_write_chunk(uint8_t data, uint8_t bit) NO_INLINE;
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-void serial_write_chunk(uint8_t data, uint8_t bit) {
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- uint8_t b, p;
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- for( p = PARITY, b = 1<<(bit-1); b ; b >>= 1) {
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- if(data & b) {
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- serial_high(); p ^= 1;
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- } else {
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- serial_low(); p ^= 0;
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- }
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- serial_delay();
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- }
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-
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- if(p & 1) { serial_high(); }
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|
|
|
- else { serial_low(); }
|
|
|
|
- serial_delay();
|
|
|
|
-
|
|
|
|
- serial_low();
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-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();
|
|
|
|
- serial_delay_half1();
|
|
|
|
- serial_low();
|
|
|
|
- serial_input_with_pullup();
|
|
|
|
- serial_delay_half1();
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-inline static
|
|
|
|
-void change_reciver2sender(void) {
|
|
|
|
- sync_recv();
|
|
|
|
- serial_delay();
|
|
|
|
- serial_low();
|
|
|
|
- serial_output();
|
|
|
|
- serial_delay_half1();
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-static inline uint8_t nibble_bits_count(uint8_t bits)
|
|
|
|
-{
|
|
|
|
- bits = (bits & 0x5) + (bits >> 1 & 0x5);
|
|
|
|
- bits = (bits & 0x3) + (bits >> 2 & 0x3);
|
|
|
|
- return bits;
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-ISR(SERIAL_PIN_INTERRUPT) {
|
|
|
|
-
|
|
|
|
-#ifndef SERIAL_USE_MULTI_TRANSACTION
|
|
|
|
- serial_low();
|
|
|
|
- serial_output();
|
|
|
|
- SSTD_t *trans = Transaction_table;
|
|
|
|
-#else
|
|
|
|
-
|
|
|
|
- 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();
|
|
|
|
- serial_output();
|
|
|
|
- _delay_sub_us(SLAVE_INT_ACK_WIDTH_UNIT*SLAVE_INT_ACK_WIDTH);
|
|
|
|
- SSTD_t *trans = &Transaction_table[tid];
|
|
|
|
- serial_low();
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
-
|
|
|
|
- if( trans->target2initiator_buffer_size > 0 )
|
|
|
|
- serial_send_packet((uint8_t *)trans->target2initiator_buffer,
|
|
|
|
- trans->target2initiator_buffer_size);
|
|
|
|
-
|
|
|
|
- change_sender2reciver();
|
|
|
|
-
|
|
|
|
-
|
|
|
|
- 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();
|
|
|
|
-}
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-#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();
|
|
|
|
-
|
|
|
|
-
|
|
|
|
- serial_output();
|
|
|
|
- serial_low();
|
|
|
|
- _delay_us(SLAVE_INT_WIDTH_US);
|
|
|
|
-
|
|
|
|
-#ifndef SERIAL_USE_MULTI_TRANSACTION
|
|
|
|
-
|
|
|
|
- serial_input_with_pullup();
|
|
|
|
- _delay_us(SLAVE_INT_RESPONSE_TIME);
|
|
|
|
-
|
|
|
|
-
|
|
|
|
- if (serial_read_pin()) {
|
|
|
|
-
|
|
|
|
- serial_output();
|
|
|
|
- serial_high();
|
|
|
|
- *trans->status = TRANSACTION_NO_RESPONSE;
|
|
|
|
- sei();
|
|
|
|
- return TRANSACTION_NO_RESPONSE;
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
-#else
|
|
|
|
-
|
|
|
|
- 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();
|
|
|
|
-
|
|
|
|
-
|
|
|
|
- serial_input_with_pullup();
|
|
|
|
- while( !serial_read_pin() ) {
|
|
|
|
- _delay_sub_us(2);
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
-
|
|
|
|
- for( int i = 0; serial_read_pin(); i++ ) {
|
|
|
|
- if (i > SLAVE_INT_ACK_WIDTH + 1) {
|
|
|
|
-
|
|
|
|
- serial_output();
|
|
|
|
- serial_high();
|
|
|
|
- *trans->status = TRANSACTION_NO_RESPONSE;
|
|
|
|
- sei();
|
|
|
|
- return TRANSACTION_NO_RESPONSE;
|
|
|
|
- }
|
|
|
|
- _delay_sub_us(SLAVE_INT_ACK_WIDTH_UNIT);
|
|
|
|
- }
|
|
|
|
-#endif
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|
|
- 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;
|
|
|
|
- }
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
-
|
|
|
|
- change_reciver2sender();
|
|
|
|
-
|
|
|
|
-
|
|
|
|
- if( trans->initiator2target_buffer_size > 0 ) {
|
|
|
|
- serial_send_packet((uint8_t *)trans->initiator2target_buffer,
|
|
|
|
- trans->initiator2target_buffer_size);
|
|
|
|
- }
|
|
|
|
-
|
|
|
|
-
|
|
|
|
- sync_send();
|
|
|
|
-
|
|
|
|
- *trans->status = TRANSACTION_END;
|
|
|
|
- sei();
|
|
|
|
- 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
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|
|
-
|
|
|