twif.c File Reference

#include <string.h>
#include <dev/irqreg.h>
#include <sys/event.h>
#include <sys/atom.h>
#include <sys/timer.h>
#include <sys/thread.h>
#include <sys/heap.h>
#include <dev/twif.h>

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Defines
#define	TWGO   (_BV(TWINT) | _BV(TWEN) | _BV(TWIE))
Functions
int	NutTwiMasterTranceive (NUTTWIBUS *bus, uint8_t sla, const void *txdata, uint16_t txlen, void *rxdata, uint16_t rxsiz, uint32_t tmo)
	Transmit and/or receive data as a master.
int	NutTwiMasterError (NUTTWIBUS *bus)
	Get last master mode error.
int	NutTwiSlaveListen (NUTTWIBUS *bus, uint8_t *sla, void *rxdata, uint16_t rxsiz, uint32_t tmo)
	Listen for incoming data from a master.
int	NutTwiSlaveRespond (NUTTWIBUS *bus, void *txdata, uint16_t txlen, uint32_t tmo)
	Send response to a master.
int	NutTwiSlaveError (NUTTWIBUS *bus)
	Get last slave mode error.
int	NutTwiSetSpeed (NUTTWIBUS *bus, uint32_t speed)
int	NutTwiGetSpeed (NUTTWIBUS *bus)
	Request Current Speed of I2C Interface.
int	NutTwiIOCtl (NUTTWIBUS *bus, int req, void *conf)
	Perform TWI control functions.
int	NutRegisterTwiBus (NUTTWIBUS *bus, uint8_t sla)
	Initialize TWI interface bus.
int	NutDestroyTwiBus (NUTTWIBUS *bus)
Variables
NUTTWIBUS	TwBbifBus
	TWI/I2C bus structure.

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Define Documentation

#define TWGO   (_BV(TWINT) | _BV(TWEN) | _BV(TWIE))

Referenced by NutTwiSlaveRespond().

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Function Documentation

int NutTwiSetSpeed	(	NUTTWIBUS *	bus,
		uint32_t	speed
	)

References cbi, NULL, NutGetCpuClock(), outb, rc, and sbi.

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int NutTwiGetSpeed

(

NUTTWIBUS *

bus

)

Request Current Speed of I2C Interface.

Returns:

0..400000 for speed, -1 in case of error.

References bit_is_set, inb, NutGetCpuClock(), and rc.

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Variable Documentation

NUTTWIBUS TwBbifBus

Initial value:

 {
    0,                   



   &sig_2WIRE_SERIAL,    

    NULL,                
    NULL,                
    NULL,                
    0,                   
    0,                   
    NULL,                
    NULL,                
}

TWI/I2C bus structure.