55 lines
2.0 KiB
C
55 lines
2.0 KiB
C
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/*
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* Generic I2C ops
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*
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* Copyright (C) 2019 - 2020 Andy Green <andy@warmcat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* This is like an abstract class for i2c, a real implementation provides
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* functions for the ops that use the underlying OS arrangements.
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*/
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#if !defined(__LWS_I2C_H__)
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#define __LWS_I2C_H__
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#include <stdint.h>
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#include <stddef.h>
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typedef struct lws_i2c_ops {
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int (*init)(const struct lws_i2c_ops *ctx);
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int (*start)(const struct lws_i2c_ops *ctx);
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void (*stop)(const struct lws_i2c_ops *ctx);
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int (*write)(const struct lws_i2c_ops *ctx, uint8_t data);
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int (*read)(const struct lws_i2c_ops *ctx);
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void (*set_ack)(const struct lws_i2c_ops *octx, int ack);
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} lws_i2c_ops_t;
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/*
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* These are implemented by calling the ops above, and so are generic
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*/
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LWS_VISIBLE LWS_EXTERN int
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lws_i2c_command(const lws_i2c_ops_t *ctx, uint8_t ads7, uint8_t c);
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LWS_VISIBLE LWS_EXTERN int
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lws_i2c_command_list(const lws_i2c_ops_t *ctx, uint8_t ads7, const uint8_t *buf,
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size_t len);
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#endif
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