text: #ifndef DI_H
  #define DI_H
  #include <rtthread.h>
  #include <rtdevice.h>
  #include <board.h>
  #include "soft_timer.h"
  #include "dev_pin.h"
  
  uint8_t di_read(uint16_t num);
  uint8_t di_immediate_read(uint16_t num);
  #endif  
  
  