LCOM1920-T7G03.old1

#include <lcom/lcf.h>

#include <lcom/lab3.h>

#include <stdbool.h>

#include <stdint.h>

#include "timer.h"

#include "keyboard.h"

int main(int argc, char *argv[]) {

  // sets the language of LCF messages (can be either EN-US or PT-PT)

  lcf_set_language("EN-US");

  // enables to log function invocations that are being "wrapped" by LCF

  // [comment this out if you don't want/need it]

  lcf_trace_calls("/home/lcom/labs/lab3/trace.txt");

  // enables to save the output of printf function calls on a file

  // [comment this out if you don't want/need it]

  lcf_log_output("/home/lcom/labs/lab3/output.txt");

  // handles control over to LCF

  // [LCF handles command line arguments and invokes the right function]

  if (lcf_start(argc, argv))

    return 1;

  // LCF clean up tasks

  // [must be the last statement before return]

  lcf_cleanup();

  return 0;

}

extern uint8_t scan_code;

extern uint32_t cnt;

extern int count;

int(kbd_test_scan)() {

  int r, ipc_status;

  uint8_t keyboard_irq, size, bytes[2]; //size of scancode can be 2 byte long

  message msg;

  bool make=false; //to check if code is make or break

  if(kbc_subscribe_int(&keyboard_irq)!=0){    //check if subscription worked

    printf("Error subscribing int\n");

    return 1;

  }

  while(scan_code!=ESC_BREAK){            //looping until scan_code is the breakcode of ESC key

    if ((r = driver_receive(ANY, &msg, &ipc_status))==1){

      printf("driver_receive failed with: %d",r);

      continue;

    }

    if (is_ipc_notify(ipc_status)){                                //received notification

      switch (_ENDPOINT_P(msg.m_source)){

        case HARDWARE:                                             //hardware interrupt notification

                if (msg.m_notify.interrupts &keyboard_irq){        // subscribed interrupt

                  kbc_ih();

                  bytes[0]=scan_code;

                  bytes[1]=scan_code;

                  if(bytes[0]==TWO_BYTE_SCANCODE){

                    size=2;

                  }

                  else{

                    size=1;

                  }

                  if (scan_code & MAKE_CODE){        //checks if code is make or break

                      make = false;                  //is break code

                    }

                  else {

                    make = true;              //is make code

                  }

                  if(kbd_print_scancode(make, size, bytes)!=0){         //prints the code

                    printf("Error printing scan code\n");

                    return 1;

                  }

                      }

               break;

        default:

              break;                             //no other notifications expected: do nothing

        }

    }

    else {                                       //received a standard message, not a notification

      //no standard messages expected: do nothing

    }

  }

   if (kbc_unsubscribe_int() != 0) {            //check if unsubscription worked

                printf("Error unsubscribing int \n");

                return 1;

        }

  if(kbd_print_no_sysinb(cnt)!=0){                  //prints the number of sys calls

    printf("Error printing number of sys used\n");

    return 1;

  }

  cnt=0;

  scan_code=0;

  return 0;

}

int(kbd_test_poll)() {

  uint8_t status, size, bytes[2]; //size of scancode can be 2 byte long

  bool make=false; //to check if code is make or break

  while(scan_code!=ESC_BREAK){      //looping until scan_code is the breakcode of ESC key, can't do                                     interruptions

    if(util_sys_inb(STATUS_REG, &status)!=0){     //checks the status register

      printf("Error reading status register\n");

      return 1;

    }

                if ((status & STAT_REG_OBF) && !(status & STAT_REG_AUX) && !(status & STAT_REG_PAR || status & STAT_REG_TIMEOUT)) {      //checks if there is no parity ot timeout error, if the output buffer                             is full and if there is mouse data

                        if(util_sys_inb(OUTPUT_BUF, &scan_code)!=0){  //reads output buffer

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

      return 1;

      }

                        bytes[0]=scan_code;

      bytes[1]=scan_code;

      if(bytes[0]==TWO_BYTE_SCANCODE){

        size=2;

      }

      else{

        size=1;

      }

      if (scan_code & MAKE_CODE){                   //checks if code is make or break

          make = false;                             //break code

        }

      else {

        make = true;                         //make code

      }

      if(kbd_print_scancode(make, size, bytes)!=0){ //prints the code

        printf("Error printing scan code\n");

        return 1;

      }

                }

                else {                                                                                                                                                 //if the output buffer is not full wait

                        tickdelay(micros_to_ticks(DELAY_US));                //makes keyboard respond to a command in 20 ms

                }

  }

  if(kbd_print_no_sysinb(cnt)!=0){                      //prints the number of sys calls

    printf("Error printing number of sys used\n");

    return 1;

  }

  if(reenable_interrupt()!=0){                          //re-enables interruptions

    printf("Couldn't re-enable the interruptions\n");

    return 1;

  }

  cnt=0;

  scan_code=0;

   return 0;

}

int(kbd_test_timed_scan)(uint8_t n) { //similar function to that of test_time_scan but with timer interruptions

  if(n<0){                    //checks if n is a valid input

    printf("Invalid time\n");

    return 1;

  }

  int r, ipc_status;

  uint8_t keyboard_irq, size, bytes[2], timer_irq;  //size of scancode can be 2 byte long

  message msg;

  bool make=false;                                  //to check if code is make or break

  if(timer_subscribe_int(&timer_irq)!=0){

    printf("Error subscribing int (timer)\n");

    return 1;

  }

  if(kbc_subscribe_int(&keyboard_irq)!=0){

    printf("Error subscribing int (keyboard)\n");

    return 1;

  }

  while((scan_code!=ESC_BREAK)&&(count/sys_hz()<n)){      //looping until scan_code is the breakcode of ESC key or until a command is issued within the time interval

    if ((r = driver_receive(ANY, &msg, &ipc_status))==1){

      printf("driver_receive failed with: %d",r);

      continue;

    }

    if (is_ipc_notify(ipc_status)){                             //received notification

      switch (_ENDPOINT_P(msg.m_source)){

        case HARDWARE:                                          //hardware interrupt notification

                if (msg.m_notify.interrupts &keyboard_irq){     // subscribed interrupt (keyboard)

                  kbc_ih();

                  bytes[0]=scan_code;

                  bytes[1]=scan_code;

                  if(bytes[0]==TWO_BYTE_SCANCODE){

                    size=2;

                  }

                  else{

                    size=1;

                  }

                  if (scan_code & MAKE_CODE){        //checks if code is make or break

                      make = false;        //break code

                    }

                  else {

                    make = true;  //make code

                  }

                  if(kbd_print_scancode(make, size, bytes)!=0){  //prints the code

                    printf("Error printing scan code\n");

                    return 1;

                  }

                  count=0;                                      //resets counter, since a keyboard                                                  interruption has ocurred

                }

                else if (msg.m_notify.interrupts &timer_irq) {  // subscribed interrupt (timer)

                  timer_int_handler();              //if a timer interruption occurs increment timer

                                        }

               break;

        default:

              break;                                     //no other notifications expected: do nothing

        }

    }

    else {                                         //received a standard message, not a notification

      //no standard messages expected: do nothing

    }

  }

   if (kbc_unsubscribe_int() != 0) {        //check if unsubscription worked

                printf("Error unsubscribing int \n");

                return 1;

        }

  if(timer_unsubscribe_int()!=0){           //check if unsubscription worked

    printf("Error unsubscribing int\n");

    return 1;

  }

  if(kbd_print_no_sysinb(cnt)!=0){                  //prints the number of sys calls

    printf("Error printing number of sys used\n");

    return 1;

  }

  cnt=0;

  scan_code=0;

  return 0;

}