#include "conf_twim.h"
#include "conf_atsha204.h"
#include "twi_master.h"
#include "sha204_physical.h"
#include "sha204_lib_return_codes.h"
#include "sha204_timer.h"

Enumerations
enum	i2c_word_address { SHA204_I2C_PACKET_FUNCTION_RESET, SHA204_I2C_PACKET_FUNCTION_SLEEP, SHA204_I2C_PACKET_FUNCTION_IDLE, SHA204_I2C_PACKET_FUNCTION_NORMAL }
	This enumeration lists all packet types sent to a SHA204 device. More...

Functions
uint8_t	sha204p_idle (void)
	This I2C function puts the SHA204 device into idle state. More...

void	sha204p_init (void)
	This function initializes peripherals (timer and communication). More...

uint8_t	sha204p_receive_response (uint8_t size, uint8_t *response)
	This I2C function receives a response from the SHA204 device. More...

uint8_t	sha204p_reset_io (void)
	This I2C function resets the I/O buffer of the SHA204 device. More...

uint8_t	sha204p_resync (uint8_t size, uint8_t *response)
	This I2C function resynchronizes communication. More...

static uint8_t	sha204p_send (uint8_t word_address, uint8_t count, uint8_t *buffer)
	This function sends a I2C packet enclosed by a I2C start and stop to a SHA204 device. More...

uint8_t	sha204p_send_command (uint8_t count, uint8_t *command)
	This I2C function sends a command to the device. More...

void	sha204p_set_device_id (uint8_t id)
	This I2C function sets the I2C address. More...

uint8_t	sha204p_sleep (void)
	This I2C function puts the SHA204 device into low-power state. More...

uint8_t	sha204p_wakeup (void)
	This I2C function generates a Wake-up pulse and delays. More...

Variables
static uint8_t	device_address = SHA204_I2C_DEFAULT_ADDRESS >> 1
	I2C address can be changed by calling sha204p_set_device_id. More...

enum i2c_word_address

This enumeration lists all packet types sent to a SHA204 device.

The following byte stream is sent to a SHA204 TWI device: {I2C start} {I2C address} {word address} [{data}] {I2C stop}. Data are only sent after a word address of value SHA204_I2C_PACKET_FUNCTION_NORMAL.

Enumerator
SHA204_I2C_PACKET_FUNCTION_RESET	Reset device.
SHA204_I2C_PACKET_FUNCTION_SLEEP	Put device into Sleep mode.
SHA204_I2C_PACKET_FUNCTION_IDLE	Put device into Idle mode.
SHA204_I2C_PACKET_FUNCTION_NORMAL	Write / evaluate data that follow this word address byte.

static uint8_t sha204p_send	(	uint8_t	word_address,
		uint8_t	count,
		uint8_t *	buffer
	)

static

This function sends a I2C packet enclosed by a I2C start and stop to a SHA204 device.

    This function combines a I2C packet send sequence that is common to all packet types.
    Only if word_address is \ref SHA204_I2C_PACKET_FUNCTION_NORMAL, count and buffer parameters are
    expected to be non-zero.

Parameters

[in]	word_address	packet function code listed in i2c_word_address
[in]	count	number of bytes in data buffer
[in]	buffer	pointer to data buffer

Returns: status of the operation

References twi_package_t::chip, device_address, SHA204_COMM_FAIL, SHA204_SUCCESS, and twi_master_write().

Referenced by sha204p_idle(), sha204p_reset_io(), sha204p_send_command(), and sha204p_sleep().

uint8_t device_address = SHA204_I2C_DEFAULT_ADDRESS >> 1

static

I2C address can be changed by calling sha204p_set_device_id.

Referenced by sha204p_receive_response(), sha204p_send(), and sha204p_set_device_id().

Microchip® Advanced Software Framework

Enumerations

Functions

Variables