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Revision 12

Added by Goncalo Alves about 5 years ago

All functions working, errors dealt with

View differences:

keyboard.c
24 24 
  uint8_t status_reg;
25 25 

  		




  26
  26
  
    
  if(util_sys_inb(STATUS_REG,&status_reg)!=0){ //checks if there is an error


  		




  
  27
  
    
    printf("Error reading status register in the keyboard interruption\n");


  		




  27
  28
  
    
    return;


  		




  28
  29
  
    
  }


  		




  29
  30
  
    
  if(((status_reg & STAT_REG_OBF)==0) ||((status_reg&(STAT_REG_PAR|STAT_REG_TIMEOUT))!=0)|| ((status_reg&STAT_REG_AUX)!=0)){ //checks if there is a parity or timeout error (mask -> 0xC0, bit 7 and 6 set), checks if output buffer is empty and checks if there is data coming from the mouse


  		




  
  31
  
    
    printf("Parity/Timeout error or output buffer is empty or data coming from the mouse\n");


  		




  30
  32
  
    
    return;


  		




  31
  33
  
    
  }


  		




  32
  
  
    
  util_sys_inb(OUTPUT_BUF,&scan_code);


  		




  
  34
  
    
  if(util_sys_inb(OUTPUT_BUF,&scan_code)!=0){//checks if there is an error


  		




  
  35
  
    
    printf("Error reading output buffer in the keyboard interruption\n");


  		




  
  36
  
    
    return;


  		




  
  37
  
    
  }


  		




  33
  38
  
    

  		




  34
  39
  
    
}


  		




  35
  40
  
    

  		




  36
  41
  
    

  		




  37
  42
  
    
int (kbc_subscribe_int)(uint8_t *bit_no) {    //similar function to that of timer_subscribe_int


  		




  38
  43
  
    
    *bit_no = BIT(keyboard_id);


  		




  39
  
  
    
    if(sys_irqsetpolicy(KEYBOARD_IRQ,(IRQ_REENABLE|IRQ_EXCLUSIVE),&keyboard_id)==1){      //operation to subscribe int


  		




  
  44
  
    
    if(sys_irqsetpolicy(KEYBOARD_IRQ,(IRQ_REENABLE|IRQ_EXCLUSIVE),&keyboard_id)==1){  //operation to subscribe int


  		




  40
  45
  
    
        printf("Error subscribing int\n");


  		




  41
  46
  
    
        return 1;


  		




  42
  47
  
    
    }


  		




  ......




  51
  56
  
    
  return 0;


  		




  52
  57
  
    
}


  		




  53
  58
  
    

  		




  54
  
  
    
int (enable_interrupt)()


  		




  
  59
  
    
int (reenable_interrupt)()


  		




  55
  60
  
    
{


  		




  56
  61
  
    
  uint8_t command;


  		




  57
  62
  
    

  		




  ......




  61
  66
  
    
  }


  		




  62
  67
  
    

  		




  63
  68
  
    
  if(util_sys_inb(OUTPUT_BUF, &command)!=0){


  		




  64
  
  
    
    printf("Error reading output buffer\n");


  		




  
  69
  
    
    printf("Error reading output buffer in enable_interrupt\n");


  		




  65
  70
  
    
    return 1;


  		




  66
  71
  
    
  }


  		




  67
  72
  
    

  		












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