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