ATCA Hardware abstraction layer for SWI over GPIO drivers. More...

#include <stdlib.h>
#include "cryptoauthlib.h"
#include "atca_status.h"
#include "atca_hal.h"
#include "atca_config.h"

Macros
Macros for Bit-Banged 1WIRE Timing
Times to drive bits at 230.4 kbps.
#define	tPUP 0

#define	tDSCHG 150

#define	tRESET 96

#define	tRRT 1

#define	tDRR 1

#define	tMSDR 2

#define	tHTSS 150

#define	tDACK 2

#define	tDACK_DLY atca_delay_us(tDACK)

#define	tRRT_DLY atca_delay_ms(tRRT)

#define	tDRR_DLY atca_delay_us(tDRR)

#define	tMSDR_DLY atca_delay_us(tMSDR)

#define	tDSCHG_DLY atca_delay_us(tDSCHG)

#define	tRESET_DLY atca_delay_us(tRESET)

#define	tHTSS_DLY atca_delay_us(tHTSS)

#define	tLOW0_MIN 6

#define	tLOW0_MAX 16

#define	tLOW1_MIN 1

#define	tLOW1_MAX 2

#define	tRCV_MIN 4

#define	tRCV_MAX 6

#define	tBIT_MIN (tLOW0_MIN + tPUP + tRCV_MIN)

#define	tBIT_MAX 75

#define	tWAKEUP 1

#define	tLOW0_TYPICAL (tLOW0_MIN + ((tLOW0_MAX - tLOW0_MIN) / 2))

#define	tLOW1_TYPICAL (tLOW1_MIN + ((tLOW1_MAX - tLOW1_MIN) / 2))

#define	tBIT_TYPICAL (tBIT_MIN + ((tBIT_MAX - tBIT_MIN) / 2 ))

#define	tLOW0_HDLY atca_delay_us(11)

#define	tRD_HDLY atca_delay_us(1)

#define	tLOW1_HDLY atca_delay_us(1)

#define	tRCV0_HDLY atca_delay_us(11)

#define	tRCV1_HDLY atca_delay_us(14)

#define	tRD_DLY atca_delay_us(1)

#define	tHIGH_SPEED_DLY atca_delay_us(1)

#define	tSWIN_DLY atca_delay_us(1)

#define	tLOW0_DLY atca_delay_us(tLOW0_TYPICAL)

#define	tLOW1_DLY atca_delay_us(tLOW1_TYPICAL)

#define	tBIT_DLY atca_delay_us(tBIT_TYPICAL)

#define	tRCV0_DLY atca_delay_us(tBIT_TYPICAL - tLOW0_TYPICAL)

#define	tRCV1_DLY atca_delay_us(tBIT_TYPICAL - tLOW1_TYPICAL)

#define	send_logic0_1wire(...) send_logic_bit(__VA_ARGS__, ATCA_GPIO_LOGIC_BIT0)

#define	send_logic1_1wire(...) send_logic_bit(__VA_ARGS__, ATCA_GPIO_LOGIC_BIT1)

#define	send_ACK_1wire(...) send_logic0_1wire(__VA_ARGS__)

#define	send_NACK_1wire(...) send_logic1_1wire(__VA_ARGS__)

#define	ATCA_1WIRE_RESET_WORD_ADDR 0x00

#define	ATCA_1WIRE_SLEEP_WORD_ADDR 0x01

#define	ATCA_1WIRE_SLEEP_WORD_ADDR_ALTERNATE 0x02

#define	ATCA_1WIRE_COMMAND_WORD_ADDR 0x03

#define	ATCA_1WIRE_RESPONSE_LENGTH_SIZE 0x01

#define	ATCA_1WIRE_BIT_MASK 0x80

#define	ATCA_GPIO_WRITE 0

#define	ATCA_GPIO_READ 1

#define	ATCA_GPIO_INPUT_DIR 0

#define	ATCA_GPIO_OUTPUT_DIR 1

#define	ATCA_GPIO_LOGIC_BIT0 0

#define	ATCA_GPIO_LOGIC_BIT1 1

#define	ATCA_GPIO_ACK ATCA_GPIO_LOGIC_BIT0

#define	ATCA_GPIO_CLEAR 0

#define	ATCA_GPIO_SET 1

#define	ATCA_MIN_RESPONSE_LENGTH 4

#define	PIN_INPUT_DIR(pin) PORT_GroupInputEnable(GET_PORT_GROUP(pin), GET_PIN_MASK(pin))

#define	PIN_OUTPUT_DIR(pin) PORT_GroupOutputEnable(GET_PORT_GROUP(pin), GET_PIN_MASK(pin))

Macros for Bit-Banged SWI Timing
Times to drive bits at 230.4 kbps.
#define	BIT_DELAY_1L atca_delay_us(4)

#define	BIT_DELAY_1H atca_delay_us(4)
	should be 4.34 us, is 4.05us

#define	BIT_DELAY_5 atca_delay_us(26)

#define	BIT_DELAY_7 atca_delay_us(34)

#define	RX_TX_DELAY atca_delay_us(65)

#define	ATCA_SWI_WAKE_WORD_ADDR ((uint8_t)0x00)

#define	ATCA_SWI_CMD_WORD_ADDR ((uint8_t)0x77)

#define	ATCA_SWI_TX_WORD_ADDR ((uint8_t)0x88)

#define	ATCA_SWI_IDLE_WORD_ADDR ((uint8_t)0xBB)

#define	ATCA_SWI_SLEEP_WORD_ADDR ((uint8_t)0xCC)

#define	ATCA_SWI_BIT_MASK 0x01

enum	protocol_type { ATCA_PROTOCOL_1WIRE , ATCA_PROTOCOL_SWI , NO_OF_PROTOCOL }

enum	delay_type { LOGIC0_1 , LOGIC0_2 , LOGIC0_3 , LOGIC0_4 , LOGIC1_1 , LOGIC1_2 , NO_OF_DELAYS }

Detailed Description

ATCA Hardware abstraction layer for SWI over GPIO drivers.

Copyright: (c) 2015-2020 Microchip Technology Inc. and its subsidiaries.

Macro Definition Documentation

◆ ATCA_SWI_WAKE_WORD_ADDR

#define ATCA_SWI_WAKE_WORD_ADDR ((uint8_t)0x00)

SWI WORD Address

◆ BIT_DELAY_1L

#define BIT_DELAY_1L atca_delay_us(4)

delay macro for width of one pulse (start pulse or zero pulse) should be 4.34 us, is 4.05 us

◆ BIT_DELAY_5

#define BIT_DELAY_5 atca_delay_us(26)

time to keep pin high for five pulses plus stop bit (used to bit-bang CryptoAuth 'zero' bit) should be 26.04 us, is 26.92 us

◆ BIT_DELAY_7

#define BIT_DELAY_7 atca_delay_us(34)

time to keep pin high for seven bits plus stop bit (used to bit-bang CryptoAuth 'one' bit) should be 34.72 us, is 35.13 us

◆ RX_TX_DELAY

#define RX_TX_DELAY atca_delay_us(65)

turn around time when switching from receive to transmit should be 93 us (Setting little less value as there would be other process before these steps)

Macros