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- /*
- * Copyright (c) 2006-2018, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date Author Notes
- * 2018-06-12 zylx the first version.
- */
- #ifndef __PCF8574_H
- #define __PCF8574_H
- #include <rtthread.h>
- #include "rtdevice.h"
- #define PCF8574_ADDR 0X20
- rt_uint8_t pcf8574_read_byte(void);
- void pcf8574_write_byte(rt_uint8_t data);
- void pcf8574_write_bit(rt_uint8_t bit, rt_uint8_t sta);
- rt_uint8_t pcf8574_read_bit(rt_uint8_t bit);
- #endif
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