ATSHA204 Component Example - USART

logging functions

Functions
uint8_t	convert_nibble_to_hexascii (uint8_t nibble)
	This function converts a nibble to Hex-ASCII. More...
void	display_status (uint8_t device_present_mask, uint8_t sha204_revision)
	This function displays information using LEDs about the SHA204 devices on the Security Xplained board. More...
void	led_display_number (uint8_t value)
	This function displays a byte value using the Xplained LEDs. More...
void	log_init (void)
	This function initializes the logging hardware. More...
void	log_sha204 (uint8_t length, uint8_t *buffer, bool is_rx)
	This function logs rx or tx data as hex-ascii. More...
void	log_sha204_title (char *title)
	This function logs the title of a SHA204 transaction. More...
void	usart_send (uint8_t length, uint8_t *buffer)

uint8_t convert_nibble_to_hexascii

(

uint8_t

nibble

)

This function converts a nibble to Hex-ASCII.

Parameters

[in]

nibble

nibble value to be converted

Returns

ASCII value

Referenced by log_sha204().

void display_status	(	uint8_t	device_present_mask,
		uint8_t	sha204_revision
	)

This function displays information using LEDs about the SHA204 devices on the Security Xplained board.

Parameters

[in]	device_present_mask	The high nibble represents the four SHA204 devices.
[in]	sha204_revision	revision of the SHA204 devices

References led_display_number(), SHA204_DEVICE_COUNT, and sha204h_delay_ms().

void led_display_number

(

uint8_t

value

)

This function displays a byte value using the Xplained LEDs.

Parameters

[in]

value

byte to display

References LED0_GPIO, LED1_GPIO, LED2_GPIO, LED3_GPIO, LED4_GPIO, LED5_GPIO, LED6_GPIO, LED7_GPIO, LED_Off, and LED_On.

Referenced by display_status(), and main().

void log_init

(

void

)

This function initializes the logging hardware.

References usart_rs232_options::baudrate, usart_serial_init(), USART_SHA204, USART_SHA204_BAUDRATE, USART_SHA204_CHAR_LENGTH, USART_SHA204_PARITY, and USART_SHA204_STOP_BIT.

Referenced by main().

void log_sha204	(	uint8_t	length,
		uint8_t *	buffer,
		bool	is_rx
	)

This function logs rx or tx data as hex-ascii.

Parameters

[in]	length	number of characters
[in]	buffer	pointer to data
[in]	is_rx	true if rx buffer, false if tx_buffer is logged

References convert_nibble_to_hexascii(), usart_putchar(), usart_serial_write_packet(), USART_SHA204, and usart_write_crlf().

Referenced by main().

void log_sha204_title

(

char *

title

)

This function logs the title of a SHA204 transaction.

Parameters

[in]

title

pointer to title string

References usart_serial_write_packet(), USART_SHA204, and usart_write_crlf().

Referenced by main().

void usart_send	(	uint8_t	length,
		uint8_t *	buffer
	)