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#ifndef __DRV_PCF8574_H
#define __DRV_PCF8574_H
#include <board.h>
#include <finsh.h>
#include <rtdevice.h>
#include <rthw.h>
//PCF8574����IO����
#define BEEP_IO 0 //�������������� P0
#define AP_INT_IO 1 //AP3216C����� P1
#define DCMI_PWDN_IO 2 //DCMI�ĵ�Դ�������� P2
#define USB_PWR_IO 3 //USB��Դ�������� P3
#define EX_IO 4 //��չIO,�Զ���ʹ�� P4
#define MPU_INT_IO 5 //MPU9250����� P5
#define RS485_RE_IO 6 //RS485_RE���� P6
#define ETH_RESET_IO 7 //��̫����λ���� P7
rt_err_t rt_pcf8574_init(void);
void rt_pcf8574_write_bit(rt_uint8_t bit, rt_uint8_t state);
rt_uint8_t rt_pcf8574_read_bit(rt_uint8_t bit);
#endif
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