89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
/*
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*
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* Copyright (c) 2012-2021 Shenshu Technologies Co., Ltd.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#ifndef __I2C_H__
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#define __I2C_H__
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#ifdef __cplusplus
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#if __cplusplus
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extern "C" {
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#endif
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#endif /* __cplusplus */
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#define READ_OPERATION (1)
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#define WRITE_OPERATION 0xfe
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#define CMD_I2C_WRITE 0x01
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#define CMD_I2C_READ 0x03
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/* I2C_CTRL_REG */
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#define I2C_ENABLE (1 << 8)
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#define I2C_UNMASK_TOTAL (1 << 7)
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#define I2C_UNMASK_START (1 << 6)
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#define I2C_UNMASK_END (1 << 5)
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#define I2C_UNMASK_SEND (1 << 4)
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#define I2C_UNMASK_RECEIVE (1 << 3)
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#define I2C_UNMASK_ACK (1 << 2)
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#define I2C_UNMASK_ARBITRATE (1<< 1)
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#define I2C_UNMASK_OVER (1 << 0)
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#define I2C_UNMASK_ALL (I2C_UNMASK_START | I2C_UNMASK_END | \
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I2C_UNMASK_SEND | I2C_UNMASK_RECEIVE | \
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I2C_UNMASK_ACK | I2C_UNMASK_ARBITRATE | \
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I2C_UNMASK_OVER)
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/* I2C_COM_REB */
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#define I2C_SEND_ACK (~(1 << 4))
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#define I2C_START (1 << 3)
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#define I2C_READ (1 << 2)
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#define I2C_WRITE (1 << 1)
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#define I2C_STOP (1 << 0)
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/* I2C_ICR_REG */
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#define I2C_CLEAR_START (1 << 6)
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#define I2C_CLEAR_END (1 << 5)
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#define I2C_CLEAR_SEND (1 << 4)
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#define I2C_CLEAR_RECEIVE (1 << 3)
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#define I2C_CLEAR_ACK (1 << 2)
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#define I2C_CLEAR_ARBITRATE (1 << 1)
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#define I2C_CLEAR_OVER (1 << 0)
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#define I2C_CLEAR_ALL (I2C_CLEAR_START | I2C_CLEAR_END | \
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I2C_CLEAR_SEND | I2C_CLEAR_RECEIVE | \
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I2C_CLEAR_ACK | I2C_CLEAR_ARBITRATE | \
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I2C_CLEAR_OVER)
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/* I2C_SR_REG */
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#define I2C_BUSY (1 << 7)
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#define I2C_START_INTR (1 << 6)
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#define I2C_END_INTR (1 << 5)
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#define I2C_SEND_INTR (1 << 4)
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#define I2C_RECEIVE_INTR (1 << 3)
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#define I2C_ACK_INTR (1 << 2)
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#define I2C_ARBITRATE_INTR (1 << 1)
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#define I2C_OVER_INTR (1 << 0)
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int i2c_write_config(unsigned char dev_addr);
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int i2c_write(unsigned char dev_addr, unsigned int reg_addr,
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unsigned int addr_byte_num, unsigned int data, unsigned int data_byte_num);
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int i2c_read(unsigned char dev_addr, unsigned int reg_addr,
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unsigned int addr_byte_num, unsigned int data_byte_num);
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#ifdef __cplusplus
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#if __cplusplus
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}
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#endif
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#endif /* __cplusplus */
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#endif
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