twim.c File Reference

#include "twim.h"

Functions
	ISR (twim_master_interrupt_handler, CONF_TWIM_IRQ_GROUP, CONF_TWIM_IRQ_LEVEL)
	TWI interrupt handler. More...
status_code_t	twim_chained_transfer (volatile avr32_twim_t *twim, volatile twim_transfer_t *first, volatile twim_transfer_t *second, bool tenbit)
	Perform Chained transfers to a TWI compatible slave device. More...
void	twim_disable_interrupt (volatile avr32_twim_t *twim)
	Disable the TWI interrupts and clear its status register. More...
status_code_t	twim_master_init (volatile avr32_twim_t *twim, const twim_options_t *opt)
	Initialize the twi master module. More...
status_code_t	twim_probe (volatile avr32_twim_t *twim, uint32_t chip_addr)
	Test if a chip answers for a given twi address. More...
status_code_t	twim_read (volatile avr32_twim_t *twim, uint8_t *buffer, uint32_t nbytes, uint32_t saddr, bool tenbit)
	Read multiple bytes from a TWI compatible slave device. More...
status_code_t	twim_read_packet (volatile avr32_twim_t *twim, const twim_package_t *package)
	Read multiple bytes from a TWI compatible slave device. More...
status_code_t	twim_set_speed (volatile avr32_twim_t *twim, uint32_t speed, uint32_t pba_hz)
	Set the twim bus speed in conjunction with the clock frequency. More...
uint8_t	twim_status (void)
	Information about the current status of the TWI Bus. More...
status_code_t	twim_write (volatile avr32_twim_t *twim, uint8_t const *buffer, uint32_t nbytes, uint32_t saddr, bool tenbit)
	Write multiple bytes to a TWI compatible slave device. More...
status_code_t	twim_write_packet (volatile avr32_twim_t *twim, const twim_package_t *package)
	Write multiple bytes to a TWI compatible slave device. More...

Variables
static volatile twim_transfer_status_t	transfer_status
static volatile avr32_twim_t *	twim_inst
static volatile uint32_t	twim_it_mask
static volatile bool	twim_next =false
static volatile const twim_package_t *	twim_package
static volatile uint8_t *	twim_rx_data = NULL
static volatile uint32_t	twim_rx_nb_bytes = 0
static const volatile uint8_t *	twim_tx_data = NULL
static volatile uint32_t	twim_tx_nb_bytes = 0

ISR	(	twim_master_interrupt_handler	,
		CONF_TWIM_IRQ_GROUP	,
		CONF_TWIM_IRQ_LEVEL
	)

TWI interrupt handler.

References AVR32_TWIM_IER_NAK_MASK, AVR32_TWIM_SR_STD_MASK, twim_package_t::buffer, twim_package_t::length, status, transfer_status, TWI_ARBITRATION_LOST, TWI_RECEIVE_NACK, twim_inst, twim_it_mask, twim_next, twim_rx_data, twim_rx_nb_bytes, twim_tx_data, and twim_tx_nb_bytes.

volatile twim_transfer_status_t transfer_status

static

Status of the bus transfer

Referenced by ISR(), twim_chained_transfer(), twim_master_init(), twim_read(), twim_read_packet(), twim_write(), and twim_write_packet().

volatile avr32_twim_t* twim_inst

static

Pointer to the instance 1 of the TWIM registers for IT.

Referenced by ISR(), twim_chained_transfer(), twim_read(), twim_read_packet(), twim_status(), twim_write(), and twim_write_packet().

volatile uint32_t twim_it_mask

static

IT mask.

Referenced by ISR(), twim_read(), twim_read_packet(), twim_write(), and twim_write_packet().

volatile bool twim_next =false

static

If Internal Address access is used

Referenced by ISR(), twim_chained_transfer(), twim_read(), twim_read_packet(), twim_write(), and twim_write_packet().

volatile const twim_package_t* twim_package

static

Pointer to twim package

volatile uint8_t* twim_rx_data = NULL

static

Pointer to the applicative TWI receive buffer.

Referenced by ISR(), twim_chained_transfer(), twim_read(), and twim_read_packet().

volatile uint32_t twim_rx_nb_bytes = 0

static

Remaining number of bytes to receive.

Referenced by ISR(), twim_read(), and twim_read_packet().

const volatile uint8_t* twim_tx_data = NULL

static

Pointer to the applicative TWI transmit buffer.

Referenced by ISR(), twim_chained_transfer(), twim_read_packet(), twim_write(), and twim_write_packet().

volatile uint32_t twim_tx_nb_bytes = 0

static

Remaining number of bytes to transmit.

Referenced by ISR(), twim_chained_transfer(), twim_read_packet(), twim_write(), and twim_write_packet().