40 lines
1.6 KiB
C
40 lines
1.6 KiB
C
/*
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* Copyright (c) 2008 Travis Geiselbrecht
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in 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,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __DEV_I2C_H
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#define __DEV_I2C_H
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void i2c_init(void);
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void i2c_init_early(void);
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/* send and receive blocks of data */
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int i2c_transmit(int bus, uint8_t address, const void *buf, size_t count);
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int i2c_receive(int bus, uint8_t address, void *buf, size_t count);
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/* a few convenience routines based on the usual way of accessing 8 byte registers on i2c slave devices */
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int i2c_write_reg(int bus, uint8_t address, uint8_t reg, uint8_t val);
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int i2c_read_reg(int bus, uint8_t address, uint8_t reg, uint8_t *val);
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#endif
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