/*************************************************************************
* Copyright (c) 2004 Altera Corporation, San Jose, California, USA.      *
* All rights reserved. All use of this software and documentation is     *
* subject to the License Agreement located at the end of this file below.*
**************************************************************************
* Description:                                                           *
* The following is a simple hello world program running MicroC/OS-II.The * 
* purpose of the design is to be a very simple application that just     *
* demonstrates MicroC/OS-II running on NIOS II.The design doesn't account*
* for issues such as checking system call return codes. etc.             *
*                                                                        *
* Requirements:                                                          *
*   -Supported Example Hardware Platforms                                *
*     Standard                                                           *
*     Full Featured                                                      *
*     Low Cost                                                           *
*   -Supported Development Boards                                        *
*     Nios II Development Board, Stratix II Edition                      *
*     Nios Development Board, Stratix Professional Edition               *
*     Nios Development Board, Stratix Edition                            *
*     Nios Development Board, Cyclone Edition                            *
*   -System Library Settings                                             *
*     RTOS Type - MicroC/OS-II                                           *
*     Periodic System Timer                                              *
*   -Know Issues                                                         *
*     If this design is run on the ISS, terminal output will take several*
*     minutes per iteration.                                             *
**************************************************************************/


#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "includes.h"

/* Definition of Task Stacks */
#define   TASK_STACKSIZE       2048
OS_STK    task1_stk[TASK_STACKSIZE];
OS_STK    task2_stk[TASK_STACKSIZE];
OS_STK    task3_stk[TASK_STACKSIZE];
OS_STK    task4_stk[TASK_STACKSIZE];

/* Definition of Task Priorities */

#define TASK1_PRIORITY      2
#define TASK2_PRIORITY      1
#define TASK3_PRIORITY      3
#define TASK4_PRIORITY      4

#define LEDS (char * ) GREEN_LEDS_BASE
#define RS232 (char *) "/dev/RS_232_UART"
#define BUFFER_SIZE 1

FILE* RS232_fp;


/* Prints "Hello World" and sleeps for three seconds */
void task1(void* pdata)
{
    char flip = 0;
    
  while (1)
  {
    if(flip){
        *LEDS = 0xff;
    } else {
        *LEDS = 0x00;
    }
    flip = ~flip;
    
    //printf("Hello from task1\n");
    OSTimeDlyHMSM(0, 0, 1, 0);
  }
}

/* Prints "Hello World" and sleeps for three seconds */
/**/
void task2(void* pdata)
{
    char flip = 0;
    
  while (1)
  {
    if(flip){
        *LEDS = 0x0f;
    } else {
        *LEDS = 0xf0;
    }
    flip = ~flip;
    
    printf("Hello from task2\n");
    OSTimeDlyHMSM(0, 0, 1, 30);
  }
}
/**/

/* Prints "Hello World" and sleeps for three seconds */
/*void task3(void* pdata)
{
    char rx_msg = 'z';
    char* rx_msg_str = malloc(sizeof(char) * BUFFER_SIZE + 1);
    char begin_rx = 0;
    
    char counter = 0;
    int  counter2 = 0;
    
    char check1 = 0;
    char check2 = 0;
    
  while (1)
  { 
    if(RS232_fp != NULL)
    {    
        //begin_rx = fgetc(RS232_fp);
        //if()
        rx_msg = fgetc(RS232_fp);
        memset(rx_msg_str, 0, BUFFER_SIZE + 1);
        //fgets(rx_msg_str, BUFFER_SIZE + 1, RS232_fp);
    }
    
    if(counter < 1)
    {
        printf("%c", rx_msg);
        counter++;
        
        if(rx_msg != 'a')
            printf("%d", counter2);
    }
    
    else
    {
        printf("%c\n", rx_msg);
        counter = 0;
        
        if(rx_msg != 'b')
            printf("%d", counter2);
    }

    counter2++;
    

    if(rx_msg == 'h')
    {
        printf("%c", rx_msg);
        check1 = 1;
        counter++;
    }
    
    else if((counter == 1) && (check1 == 1))
    {
        printf("%c", rx_msg);
        check1 = 0;
        check2 = 1;
        counter++;
    }
    
    else if((counter == 2) && (check2 == 1))
    {
        printf("%c\n", rx_msg);
        check2 = 0;
        counter = 0;
    }
    
    else
        printf("\nError.\n");
        
    
    //printf("rx_msg_str: %s\n", rx_msg_str);
    OSTimeDlyHMSM(0, 0, 0.1, 0);
  }
}
*/
 
void task4(void* pdata)
{
    char rx_msg = 'z';
    char* rx_msg_str = malloc(sizeof(char) * BUFFER_SIZE + 1);
    
 char begin_rx = 'g';
 // char other_rx = 'x';
  
  static int counter =0;
  int i=0;
  static int k=0;
    
  while (1)
  { 
    
    if(RS232_fp != NULL)
    {    
        begin_rx = rx_msg_str;
       
        memset(rx_msg_str, 0, BUFFER_SIZE + 1);
        fgets(rx_msg_str, BUFFER_SIZE + 1, RS232_fp);
        counter++;
        i = strncmp (begin_rx,rx_msg_str,2);
       
        if(k!=i) 
        {
        printf("rx_msg_str: %s\n", rx_msg_str);
        printf("counter is: %d\n", counter);
        k=i;
        begin_rx = rx_msg_str;
        }
    }
   
   
   
    
    //printf("rx_msg_str: %s\n", rx_msg_str);
    OSTimeDlyHMSM(0, 0, 0.1, 0);
  }
}

/* The main function creates two task and starts multi-tasking */
int main(void)
{
  
  OSTaskCreateExt(task1,
                  NULL,
                  (void *)&task1_stk[TASK_STACKSIZE-1],
                  TASK1_PRIORITY,
                  TASK1_PRIORITY,
                  task1_stk,
                  TASK_STACKSIZE,
                  NULL,
                  0);
              
  /*
  OSTaskCreateExt(task2,
                  NULL,
                  (void *)&task2_stk[TASK_STACKSIZE-1],
                  TASK2_PRIORITY,
                  TASK2_PRIORITY,
                  task2_stk,
                  TASK_STACKSIZE,
                  NULL,
                  0);
  /**/
  
  /**/
  /*OSTaskCreateExt(task3,
                  NULL,
                  (void *)&task3_stk[TASK_STACKSIZE-1],
                  TASK3_PRIORITY,
                  TASK3_PRIORITY,
                  task3_stk,
                  TASK_STACKSIZE,
                  NULL,
                  0); 
                  */
 OSTaskCreateExt(task4,
                  NULL,
                  (void *)&task4_stk[TASK_STACKSIZE-1],
                  TASK4_PRIORITY,
                  TASK4_PRIORITY,
                  task4_stk,
                  TASK_STACKSIZE,
                  NULL,
                  0); 
  /**/
  
  RS232_fp = fopen(RS232, "r");
  //RS232_fp = fopen(RS232, "w+");
  
  OSStart();
  return 0;
}

/******************************************************************************
*                                                                             *
* License Agreement                                                           *
*                                                                             *
* Copyright (c) 2004 Altera Corporation, San Jose, California, USA.           *
* All rights reserved.                                                        *
*                                                                             *
* Permission is hereby granted, free of charge, to any person obtaining a     *
* copy of this software and associated documentation files (the "Software"),  *
* to deal in the Software without restriction, including without limitation   *
* the rights to use, copy, modify, merge, publish, distribute, sublicense,    *
* and/or sell copies of the Software, and to permit persons to whom the       *
* Software is furnished to do so, subject to the following conditions:        *
*                                                                             *
* The above copyright notice and this permission notice shall be included in  *
* all copies or substantial portions of the Software.                         *
*                                                                             *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR  *
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,    *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER      *
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING     *
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER         *
* DEALINGS IN THE SOFTWARE.                                                   *
*                                                                             *
* This agreement shall be governed in all respects by the laws of the State   *
* of California and by the laws of the United States of America.              *
* Altera does not recommend, suggest or require that this reference design    *
* file be used in conjunction or combination with any other product.          *
******************************************************************************/
