75 lines
2.5 KiB
C
75 lines
2.5 KiB
C
|
/*
|
||
|
|
/ _____) _ | |
|
||
|
|
( (____ _____ ____ _| |_ _____ ____| |__
|
||
|
|
\____ \| ___ | (_ _) ___ |/ ___) _ \
|
||
|
|
_____) ) ____| | | || |_| ____( (___| | | |
|
||
|
|
(______/|_____)_|_|_| \__)_____)\____)_| |_|
|
||
|
|
(C)2019 Semtech
|
||
|
|
|
||
|
|
Description:
|
||
|
|
Host specific functions to address the LoRa concentrator I2C peripherals.
|
||
|
|
|
||
|
|
License: Revised BSD License, see LICENSE.TXT file include in the project
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
#ifndef _LORAGW_I2C_H
|
||
|
|
#define _LORAGW_I2C_H
|
||
|
|
|
||
|
|
/* -------------------------------------------------------------------------- */
|
||
|
|
/* --- DEPENDANCIES --------------------------------------------------------- */
|
||
|
|
|
||
|
|
#include <stdint.h> /* C99 types*/
|
||
|
|
|
||
|
|
#include "config.h" /* library configuration options (dynamically generated) */
|
||
|
|
|
||
|
|
/* -------------------------------------------------------------------------- */
|
||
|
|
/* --- PUBLIC CONSTANTS ----------------------------------------------------- */
|
||
|
|
|
||
|
|
#define LGW_I2C_SUCCESS 0
|
||
|
|
#define LGW_I2C_ERROR -1
|
||
|
|
|
||
|
|
#define I2C_DEVICE "/dev/i2c-1"
|
||
|
|
|
||
|
|
/* -------------------------------------------------------------------------- */
|
||
|
|
/* --- PUBLIC FUNCTIONS PROTOTYPES ------------------------------------------ */
|
||
|
|
|
||
|
|
/**
|
||
|
|
@brief Open I2C port
|
||
|
|
@param path Path to the I2C device driver (absolute or relative)
|
||
|
|
@param device_addr Address of the device
|
||
|
|
@param i2c_fd Pointer to receive I2C port file descriptor index
|
||
|
|
@return 0 if I2C port was open successfully, -1 else
|
||
|
|
*/
|
||
|
|
int i2c_linuxdev_open(const char *path, uint8_t device_addr, int *i2c_fd);
|
||
|
|
|
||
|
|
/**
|
||
|
|
@brief Close I2C port
|
||
|
|
@param i2c_fd I2C port file descriptor index
|
||
|
|
@return 0 if I2C port was closed successfully, -1 else
|
||
|
|
*/
|
||
|
|
int i2c_linuxdev_close(int i2c_fd);
|
||
|
|
|
||
|
|
/**
|
||
|
|
@brief Read data from an I2C port
|
||
|
|
@param i2c_fd I2C port file descriptor index
|
||
|
|
@param device_addr I2C device address
|
||
|
|
@param reg_addr Address of the register to be read
|
||
|
|
@param data Pointer to a buffer to store read data
|
||
|
|
@return 0 if I2C data read is successful, -1 else
|
||
|
|
*/
|
||
|
|
int i2c_linuxdev_read(int i2c_fd, uint8_t device_addr, uint8_t reg_addr, uint8_t *data);
|
||
|
|
|
||
|
|
/**
|
||
|
|
@brief Write data to an I2C port
|
||
|
|
@param i2c_fd I2C port file descriptor index
|
||
|
|
@param device_addr I2C device address
|
||
|
|
@param reg_addr Address of the register to write to
|
||
|
|
@param data byte to write in the register
|
||
|
|
@return 0 if I2C data write is successful, -1 else
|
||
|
|
*/
|
||
|
|
int i2c_linuxdev_write(int i2c_fd, uint8_t device_addr, uint8_t reg_addr, uint8_t data);
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* --- EOF ------------------------------------------------------------------ */
|