29 lines
696 B
C
29 lines
696 B
C
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/*
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* File : drv_pcf8574.h
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006-2013, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2018-06-12 zylx the first version.
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*/
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#ifndef __PCF8574_H
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#define __PCF8574_H
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#include <rtthread.h>
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#include "rtdevice.h"
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#define PCF8574_ADDR 0X20
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rt_uint8_t pcf8574_read_byte(void);
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void pcf8574_write_byte(rt_uint8_t data);
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void pcf8574_write_bit(rt_uint8_t bit, rt_uint8_t sta);
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rt_uint8_t pcf8574_read_bit(rt_uint8_t bit);
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#endif
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