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/* not yet implemented */
/*
* RTEMS driver for Blackfin TWI (I2C)
*
* COPYRIGHT (c) 2008 Kallisti Labs, Los Gatos, CA, USA
* written by Allan Hessenflow <allanh@kallisti.com>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#ifndef _twi_h_
#define _twi_h_
#ifdef __cplusplus
extern "C" {
#endif
typedef struct {
uint32_t sclk;
void *base;
bool fast;
int8_t slave_address;
} bfin_twi_config_t;
typedef struct bfin_twi_request_s {
bool write;
int count;
void *data;
/* Chained requests are done with repeated start conditions in between.
These are useful for atomic address write/data read transactions
(which can be important in multi-master configurations), and for
doing 10-bit addressing. */
struct bfin_twi_request_s *next;
} bfin_twi_request_t;
typedef rtems_status_code (*bfin_twi_callback_t)(int channel,
void *arg,
bool general_call,
bool write,
bool done,
int read_count,
uint8_t *data);
rtems_status_code bfin_twi_init(int channel, bfin_twi_config_t *config);
rtems_status_code bfin_twi_register_callback(int channel,
bfin_twi_callback_t callback,
void *arg);
void bfin_twi_isr(int source);
rtems_status_code bfin_twi_request(int channel, uint8_t address,
bfin_twi_request_t *request,
rtems_interval timeout);
#ifdef __cplusplus
}
#endif
#endif /* _twi_h_ */
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