i2c.h File Reference
#include "pico.h"
#include "pico/time.h"
#include "hardware/structs/i2c.h"

Go to the source code of this file.

Data Structures

struct  i2c_inst
 

Macros

#define PARAM_ASSERTIONS_ENABLED_I2C   0
 

Typedefs

typedef struct i2c_inst i2c_inst_t
 

Functions

uint i2c_init (i2c_inst_t *i2c, uint baudrate)
 Initialise the I2C HW block. More...
 
void i2c_deinit (i2c_inst_t *i2c)
 Disable the I2C HW block. More...
 
uint i2c_set_baudrate (i2c_inst_t *i2c, uint baudrate)
 Set I2C baudrate. More...
 
void i2c_set_slave_mode (i2c_inst_t *i2c, bool slave, uint8_t addr)
 Set I2C port to slave mode. More...
 
static uint i2c_hw_index (i2c_inst_t *i2c)
 Convert I2C instance to hardware instance number. More...
 
static i2c_hw_ti2c_get_hw (i2c_inst_t *i2c)
 
int i2c_write_blocking_until (i2c_inst_t *i2c, uint8_t addr, const uint8_t *src, size_t len, bool nostop, absolute_time_t until)
 Attempt to write specified number of bytes to address, blocking until the specified absolute time is reached. More...
 
int i2c_read_blocking_until (i2c_inst_t *i2c, uint8_t addr, uint8_t *dst, size_t len, bool nostop, absolute_time_t until)
 Attempt to read specified number of bytes from address, blocking until the specified absolute time is reached. More...
 
static int i2c_write_timeout_us (i2c_inst_t *i2c, uint8_t addr, const uint8_t *src, size_t len, bool nostop, uint timeout_us)
 Attempt to write specified number of bytes to address, with timeout. More...
 
int i2c_write_timeout_per_char_us (i2c_inst_t *i2c, uint8_t addr, const uint8_t *src, size_t len, bool nostop, uint timeout_per_char_us)
 
static int i2c_read_timeout_us (i2c_inst_t *i2c, uint8_t addr, uint8_t *dst, size_t len, bool nostop, uint timeout_us)
 Attempt to read specified number of bytes from address, with timeout. More...
 
int i2c_read_timeout_per_char_us (i2c_inst_t *i2c, uint8_t addr, uint8_t *dst, size_t len, bool nostop, uint timeout_per_char_us)
 
int i2c_write_blocking (i2c_inst_t *i2c, uint8_t addr, const uint8_t *src, size_t len, bool nostop)
 Attempt to write specified number of bytes to address, blocking. More...
 
int i2c_read_blocking (i2c_inst_t *i2c, uint8_t addr, uint8_t *dst, size_t len, bool nostop)
 Attempt to read specified number of bytes from address, blocking. More...
 
static size_t i2c_get_write_available (i2c_inst_t *i2c)
 Determine non-blocking write space available. More...
 
static size_t i2c_get_read_available (i2c_inst_t *i2c)
 Determine number of bytes received. More...
 
static void i2c_write_raw_blocking (i2c_inst_t *i2c, const uint8_t *src, size_t len)
 Write direct to TX FIFO. More...
 
static void i2c_read_raw_blocking (i2c_inst_t *i2c, uint8_t *dst, size_t len)
 Read direct from RX FIFO. More...
 
#define i2c0   (&i2c0_inst)
 Identifier for I2C HW Block 0.
 
#define i2c1   (&i2c1_inst)
 Identifier for I2C HW Block 1.
 
i2c_inst_t i2c0_inst
 
i2c_inst_t i2c1_inst