File syn_i2c.c

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Hardware-decoupled I2C driver implementation.

• #include "../util/syn_assert.h"
• #include "syn_i2c.h"
• #include <string.h>

Public Functions

Type	Name
SYN_Status	syn_i2c_deinit (SYN_I2C * i2c) De-initialize an I2C instance.
SYN_Status	syn_i2c_init (SYN_I2C * i2c, const SYN_I2C_Config * cfg) Initialize an I2C instance.
SYN_Status	syn_i2c_read_reg (SYN_I2C * i2c, uint16_t addr, uint8_t reg, uint8_t * val) Read an 8-bit register from a slave device.
SYN_Status	syn_i2c_transfer (SYN_I2C * i2c, uint16_t addr, const uint8_t * tx, size_t tx_len, uint8_t * rx, size_t rx_len) Perform raw buffer transfer (Write, Read, or Write-Read restart).
SYN_Status	syn_i2c_write_reg (SYN_I2C * i2c, uint16_t addr, uint8_t reg, uint8_t val) Write an 8-bit register on a slave device.

Public Functions Documentation

function syn_i2c_deinit

De-initialize an I2C instance.

SYN_Status syn_i2c_deinit (
    SYN_I2C * i2c
) 

Parameters:

• i2c Pointer to SYN_I2C handle.

Returns:

SYN_OK on success.

---

function syn_i2c_init

Initialize an I2C instance.

SYN_Status syn_i2c_init (
    SYN_I2C * i2c,
    const SYN_I2C_Config * cfg
) 

Parameters:

• i2c Pointer to SYN_I2C handle.
• cfg Configuration structure.

Returns:

SYN_OK on success.

---

function syn_i2c_read_reg

Read an 8-bit register from a slave device.

SYN_Status syn_i2c_read_reg (
    SYN_I2C * i2c,
    uint16_t addr,
    uint8_t reg,
    uint8_t * val
) 

Parameters:

• i2c Pointer to initialized I2C handle.
• addr 7-bit slave address.
• reg Register index byte.
• val Pointer to store output register byte.

Returns:

SYN_OK on success.

---

function syn_i2c_transfer

Perform raw buffer transfer (Write, Read, or Write-Read restart).

SYN_Status syn_i2c_transfer (
    SYN_I2C * i2c,
    uint16_t addr,
    const uint8_t * tx,
    size_t tx_len,
    uint8_t * rx,
    size_t rx_len
) 

Parameters:

• i2c Pointer to initialized I2C handle.
• addr Target 7-bit slave address.
• tx TX data buffer (can be NULL).
• tx_len TX byte count.
• rx RX data buffer (can be NULL).
• rx_len RX byte count.

Returns:

SYN_OK on success.

---

function syn_i2c_write_reg

Write an 8-bit register on a slave device.

SYN_Status syn_i2c_write_reg (
    SYN_I2C * i2c,
    uint16_t addr,
    uint8_t reg,
    uint8_t val
) 

Parameters:

• i2c Pointer to initialized I2C handle.
• addr 7-bit slave address.
• reg Register index byte.
• val Byte to write into register.

Returns:

SYN_OK on success.

---

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The documentation for this class was generated from the following file src/syntropic/drivers/syn_i2c.c