/* * MIT License * * Copyright (c) 2018 David Antliff * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #ifndef I2C_MASTER_H #define I2C_MASTER_H #include "freertos/FreeRTOS.h" #include "freertos/semphr.h" #include "driver/i2c.h" #define I2C_MASTER_NUM I2C_NUM_0 #define I2C_MASTER_TX_BUF_LEN 0 // disabled #define I2C_MASTER_RX_BUF_LEN 0 // disabled #define I2C_MASTER_FREQ_HZ 100000 // Hz typedef struct { i2c_port_t port; i2c_config_t config; SemaphoreHandle_t semaphore; } i2c_master_info_t; i2c_master_info_t * i2c_master_init(i2c_port_t i2c_port, gpio_num_t sda_io_num, gpio_num_t scl_io_num, uint32_t clk_speed); int i2c_master_scan(const i2c_master_info_t * info); void i2c_master_close(i2c_master_info_t * info); bool i2c_master_lock(const i2c_master_info_t * info, TickType_t ticks_to_wait); void i2c_master_unlock(const i2c_master_info_t * info); #endif // I2C_MASTER_H