TWI - Two-Wire Slave Interface

Driver for the TWIS (Two-Wire Slave Interface).

This driver provides access to the main features of the TWIS controller. The TWIS interconnects a TWI slave on a unique two-wire bus. The TWIS is programmable as a slave with sequential or single-byte access. Internal Address access and Ten bit addressing mode is supported.

Data Structures
struct	twis_options_t
	Input parameters when initializing the twi module mode. More...
struct	twis_package_t
	Information concerning the data transmission. More...
struct	twis_slave_fct_t
	Pointer on TWI slave user specific application routines. More...

Functions
void	twis_send_data_ack (volatile avr32_twis_t *twis)
	Enable ACK transfer in Slave Receiver Mode. More...
void	twis_send_data_nack (volatile avr32_twis_t *twis, bool stop_callback)
	Enable NACK transfer in Slave Receive Mode. More...
status_code_t	twis_slave_init (volatile avr32_twis_t *twis, const twis_options_t *opt, const twis_slave_fct_t *slave_fct)
	Initialize the TWI Slave Module. More...

TWI Driver Compatibility
Codes for UC3 devices using TWI modules can easily be ported to UC3 devices with TWIM module
#define	avr32_twi_t   avr32_twis_t
#define	twi_options_t   twis_options_t
#define	twi_package_t   twis_package_t
#define	twi_slave_fct_t   twis_slave_fct_t
#define	twi_slave_init   twis_slave_init

#define avr32_twi_t   avr32_twis_t

#define twi_options_t   twis_options_t

#define twi_package_t   twis_package_t

#define twi_slave_fct_t   twis_slave_fct_t

#define twi_slave_init   twis_slave_init

void twis_send_data_ack

(

volatile avr32_twis_t *

twis

)

Enable ACK transfer in Slave Receiver Mode.

Parameters

twis	Base address of the TWI (i.e. &AVR32_TWIS).

void twis_send_data_nack	(	volatile avr32_twis_t *	twis,
		bool	stop_callback
	)

Enable NACK transfer in Slave Receive Mode.

Parameters

twis	Base address of the TWI (i.e. &AVR32_TWIS).
stop_callback	Set true to use Stop condition Callback function

References twis_slave_fct_t::stop, and UL.

status_code_t twis_slave_init	(	volatile avr32_twis_t *	twis,
		const twis_options_t *	opt,
		const twis_slave_fct_t *	slave_fct
	)

Initialize the TWI Slave Module.

Parameters

twis	Base address of the TWI (i.e. &AVR32_TWIS).
*opt	Options for initializing the TWI module (see twis_options_t)
*slave_fct	Pointer on application functions

References twis_options_t::chip, CONF_TWIS_IRQ_LEVEL, CONF_TWIS_IRQ_LINE, cpu_irq_disable, cpu_irq_restore(), cpu_irq_save(), irq_register_handler, twis_options_t::pba_hz, twis_options_t::smbus, twis_options_t::speed, STATUS_OK, twis_options_t::tenbit, twis_inst_slave, and UL.