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63 lines
2.3 KiB
C
63 lines
2.3 KiB
C
/*
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* Copyright (c) 2020 Bouffalolab.
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*
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* This file is part of
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* *** Bouffalolab Software Dev Kit ***
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* (see www.bouffalolab.com).
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of Bouffalo Lab nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __BL_I2C_H__
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#define __BL_I2C_H__
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#include <stdint.h>
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#define I2C_M_READ 1
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#define I2C_M_WRITE 0
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#define I2C_M_BLOCK 0
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#define I2C_M_NO_BLOCK 1
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typedef struct i2c_msg {
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uint16_t addr;
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uint8_t direct;
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uint8_t subflag;
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uint32_t subaddr;
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uint8_t sublen;
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uint32_t len;
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uint8_t *buf;
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int event;
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int idex;
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int block;
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int stop;
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int ins_num;
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int i2cx;
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} i2c_msg_t;
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void i2c_set_freq(int freq, int i2cx);
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void i2c_gpio_init(int i2cx);
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void i2c_clear_status(int i2cx);
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void do_write_data(i2c_msg_t *pstmsg);
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void do_read_data(i2c_msg_t *pstmsg);
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void i2c_transfer_start(i2c_msg_t *pstmsg);
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#endif
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