lws-i2c.h (2061B)
1/* 2 * Generic I2C ops 3 * 4 * Copyright (C) 2019 - 2020 Andy Green <andy@warmcat.com> 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to 8 * deal in the Software without restriction, including without limitation the 9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 10 * sell copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 22 * IN THE SOFTWARE. 23 * 24 * This is like an abstract class for i2c, a real implementation provides 25 * functions for the ops that use the underlying OS arrangements. 26 */ 27 28#if !defined(__LWS_I2C_H__) 29#define __LWS_I2C_H__ 30 31#include <stdint.h> 32#include <stddef.h> 33 34typedef struct lws_i2c_ops { 35 int (*init)(const struct lws_i2c_ops *ctx); 36 int (*start)(const struct lws_i2c_ops *ctx); 37 void (*stop)(const struct lws_i2c_ops *ctx); 38 int (*write)(const struct lws_i2c_ops *ctx, uint8_t data); 39 int (*read)(const struct lws_i2c_ops *ctx); 40 void (*set_ack)(const struct lws_i2c_ops *octx, int ack); 41} lws_i2c_ops_t; 42 43/* 44 * These are implemented by calling the ops above, and so are generic 45 */ 46 47LWS_VISIBLE LWS_EXTERN int 48lws_i2c_command(const lws_i2c_ops_t *ctx, uint8_t ads7, uint8_t c); 49 50LWS_VISIBLE LWS_EXTERN int 51lws_i2c_command_list(const lws_i2c_ops_t *ctx, uint8_t ads7, const uint8_t *buf, 52 size_t len); 53 54#endif