26 lines
707 B
C
26 lines
707 B
C
#ifndef __DRV_PCF8574_H
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#define __DRV_PCF8574_H
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#include <board.h>
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#include <finsh.h>
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#include <rtdevice.h>
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#include <rthw.h>
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//PCF8574各个IO的功能
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#define BEEP_IO 0 //蜂鸣器控制引脚 P0
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#define AP_INT_IO 1 //AP3216C中断引脚 P1
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#define DCMI_PWDN_IO 2 //DCMI的电源控制引脚 P2
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#define USB_PWR_IO 3 //USB电源控制引脚 P3
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#define EX_IO 4 //扩展IO,自定义使用 P4
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#define MPU_INT_IO 5 //MPU9250中断引脚 P5
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#define RS485_RE_IO 6 //RS485_RE引脚 P6
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#define ETH_RESET_IO 7 //以太网复位引脚 P7
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rt_err_t rt_pcf8574_init(void);
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void rt_pcf8574_write_bit(rt_uint8_t bit, rt_uint8_t state);
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rt_uint8_t rt_pcf8574_read_bit(rt_uint8_t bit);
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#endif
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