drv_pcf8574.h 508 B

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  1. /*
  2. * Copyright (c) 2006-2018, RT-Thread Development Team
  3. *
  4. * SPDX-License-Identifier: Apache-2.0
  5. *
  6. * Change Logs:
  7. * Date Author Notes
  8. * 2018-06-12 zylx the first version.
  9. */
  10. #ifndef __PCF8574_H
  11. #define __PCF8574_H
  12. #include <rtthread.h>
  13. #include "rtdevice.h"
  14. #define PCF8574_ADDR 0X20
  15. rt_uint8_t pcf8574_read_byte(void);
  16. void pcf8574_write_byte(rt_uint8_t data);
  17. void pcf8574_write_bit(rt_uint8_t bit, rt_uint8_t sta);
  18. rt_uint8_t pcf8574_read_bit(rt_uint8_t bit);
  19. #endif