i2c.h File Reference

I2C support API. More...

#include <rtems.h>
#include <dev/i2c/i2c.h>
#include <bsp.h>

Go to the source code of this file.

Data Structures
struct	i2c_regs
struct	bbb_i2c_bus

Macros
#define	BBB_I2C_CON_EN   (1 << 15) /* I2C module enable */
#define	BBB_I2C_CON_BE   (1 << 14) /* Big endian mode */
#define	BBB_I2C_CON_STB   (1 << 11) /* Start byte mode (master mode only) */
#define	BBB_I2C_CON_MST   (1 << 10) /* Master/slave mode */
#define	BBB_I2C_CON_TRX   (1 << 9) /* Transmitter/receiver mode */
#define	BBB_I2C_CON_XA   (1 << 8) /* Expand address */
#define	BBB_I2C_CON_STP   (1 << 1) /* Stop condition (master mode only) */
#define	BBB_I2C_CON_STT   (1 << 0) /* Start condition (master mode only) */
#define	BBB_I2C_CON_CLR   0x0 /* Clear configuration register */
#define	BBB_I2C_STAT_SBD   (1 << 15) /* Single byte data */
#define	BBB_I2C_STAT_BB   (1 << 12) /* Bus busy */
#define	BBB_I2C_STAT_ROVR   (1 << 11) /* Receive overrun */
#define	BBB_I2C_STAT_XUDF   (1 << 10) /* Transmit underflow */
#define	BBB_I2C_STAT_AAS   (1 << 9) /* Address as slave */
#define	BBB_I2C_STAT_GC   (1 << 5)
#define	BBB_I2C_STAT_XRDY   (1 << 4) /* Transmit data ready */
#define	BBB_I2C_STAT_RRDY   (1 << 3) /* Receive data ready */
#define	BBB_I2C_STAT_ARDY   (1 << 2) /* Register access ready */
#define	BBB_I2C_STAT_NACK   (1 << 1) /* No acknowledgment interrupt enable */
#define	BBB_I2C_STAT_AL   (1 << 0) /* Arbitration lost interrupt enable */
#define	BBB_I2C_IE_GC_IE   (1 << 5)
#define	BBB_I2C_IE_XRDY_IE   (1 << 4) /* Transmit data ready interrupt enable */
#define	BBB_I2C_IE_RRDY_IE   (1 << 3) /* Receive data ready interrupt enable */
#define	BBB_I2C_IE_ARDY_IE   (1 << 2) /* Register access ready interrupt enable */
#define	BBB_I2C_IE_NACK_IE   (1 << 1) /* No acknowledgment interrupt enable */
#define	BBB_I2C_IE_AL_IE   (1 << 0) /* Arbitration lost interrupt enable */
#define	BBB_I2C_SYSC_SRST   (1 << 1)
#define	BBB_I2C_TIMEOUT   1000
#define	BBB_I2C_SYSS_RDONE   (1 << 0) /* Internel reset monitoring */
#define	BBB_CONFIG_SYS_I2C_SPEED   100000
#define	BBB_CONFIG_SYS_I2C_SLAVE   1
#define	BBB_I2C_ALL_FLAGS   0x7FFF
#define	BBB_I2C_ALL_IRQ_FLAGS   0xFFFF
#define	BBB_I2C_SYSCLK   48000000
#define	BBB_I2C_INTERNAL_CLK   12000000
#define	BBB_I2C_SPEED_CLK   100000
#define	BBB_I2C_IRQ_ERROR
#define	BBB_I2C_IRQ_USED
#define	BBB_I2C_0_BUS_PATH   "/dev/i2c-0"
#define	BBB_I2C_1_BUS_PATH   "/dev/i2c-1"
#define	BBB_I2C_2_BUS_PATH   "/dev/i2c-2"
#define	BBB_I2C0_IRQ   70
#define	BBB_I2C1_IRQ   71
#define	BBB_I2C2_IRQ   30
#define	BBB_MODE2   2
#define	BBB_MODE3   3

Typedefs
typedef struct i2c_regs	bbb_i2c_regs
typedef struct bbb_i2c_bus	bbb_i2c_bus

Enumerations
enum	bbb_i2c_id_t { I2C0, I2C1, I2C2, I2C_COUNT }

Functions
int	am335x_i2c_bus_register (const char *bus_path, uintptr_t register_base, uint32_t input_clock, rtems_vector_number irq)

Detailed Description

I2C support API.

Macro Definition Documentation

BBB_I2C_IRQ_ERROR

#define BBB_I2C_IRQ_ERROR

Value:

( AM335X_I2C_IRQSTATUS_NACK \
    | AM335X_I2C_IRQSTATUS_ROVR \
    | AM335X_I2C_IRQSTATUS_AL \
    | AM335X_I2C_IRQSTATUS_ARDY \
    | AM335X_I2C_IRQSTATUS_RRDY \
    | AM335X_I2C_IRQSTATUS_XRDY \
    | AM335X_I2C_IRQSTATUS_XUDF )

BBB_I2C_IRQ_USED

#define BBB_I2C_IRQ_USED

Value:

( AM335X_I2C_IRQSTATUS_ARDY \
    | AM335X_I2C_IRQSTATUS_XRDY )