RTOS CONCEPT's ARM LPC2148 EMBEDDED 'C' CODES-I

PROGRAM 1:

PROGRAM TO IMPLEMENT  SIMPLE TASK SWITCHING

#include <rtl.h>

#include <lpc21xx.h>

#include <stdio.h>

void init_serial (void);

OS_TID tsk1,tsk2;

char    cnt1,cnt2,test2;

__task void job1 (void);

__task void job2 (void);

char arr1[20],arr2[20];

unsigned int i = 0;

__task void job1 (void)

 {

  os_tsk_prio_self (2);

  while (1)

   {

 os_tsk_create (job2, 1);

             os_evt_wait_or (0x0001, 0x0000);

             cnt1++;

             sprintf(arr1,"counter1 :%d",cnt1);

          while (arr1[i] != '\0')

          {

                    while (!(U0LSR & 0x20));

                    U0THR = arr1[i];

                   i++;

          }

          i=0;

          while (!(U0LSR & 0x20));

          U0THR = '\r';

          if (cnt1==0x05)

          cnt1=0;

          os_dly_wait(1);                                           

    }

}

__task void job2 (void)

 {

  while (1)

   {

          cnt2++;

sprintf(arr2,"counter2 :%d",cnt2);

while (arr2[i] != '\0')

          {

                    while (!(U0LSR & 0x20));

                    U0THR = arr2[i];

                   i++;

          }

          os_dly_wait(3);

          i=0; 

          while (!(U0LSR & 0x20)); 

          U0THR = '\n';       

          if(cnt2==0x0f)

{

 cnt2=0;

os_evt_set (0x0001, tsk1);        

  }

test2=22;

           os_dly_wait(3);

          test2=0;

          os_dly_wait(3);

  }

}

int main (void)

{

cnt1=0;

cnt2=0;

   init_serial ();

  os_sys_init (job1);

  while (1);

}

void init_serial (void) {

  PINSEL0 = 0X0000005;                 // Enable RxD0 and TxD0             

  U0LCR = 0x83;                         // 8 bits, no Parity, 1 Stop bit    

  U0DLL = 0x61;                           // 9600 Baud Rate @ 15MHz VPB Clock 

  U0LCR = 0x03;                         // DLAB = 0                         

}

PROGRAM 2:

PROGRAM TO IMPLEMENT SIMPLE ROUND ROBIN TASK SWITCHING

#include <rtl.h>

#include <lpc21xx.h>

#include <stdio.h>

void init_serial (void);

int counter1;

int counter2;

char arr1[20],arr2[20];

int i=0;

__task void job1 (void);

__task void job2 (void);

__task void job1 (void) {

  os_tsk_create (job2, 0); 

  while (1) {              

    counter1++; 

          sprintf(arr1,"counter1 :%d",counter1);

          while (arr1[i] != '\0')

          {

                    while (!(U0LSR & 0x20));

                    U0THR = arr1[i];

                   i++;

          }

          i=0;

          while (!(U0LSR & 0x20));

          U0THR = '\n';

                    

  }

}

__task void job2 (void) {

  while (1) {               

    counter2++;             

sprintf(arr2,"counter2 :%d",counter2);

          while (arr2[i] != '\0')

          {

                    while (!(U0LSR & 0x20));

                    U0THR = arr2[i];

                   i++;

          }

          i=0;

          while (!(U0LSR & 0x20));

          U0THR = '\n';

  }

}

void main (void)

 {

init_serial();

  os_sys_init (job1);       

  for (;;);

}

void init_serial (void)

{

  PINSEL0 = 0X0000005;                 // Enable RxD0 and TxD0             

  U0LCR = 0x83;                         // 8 bits, no Parity, 1 Stop bit     

  U0DLL = 0x61;                           // 9600 Baud Rate @ 15MHz VPB Clock 

  U0LCR = 0x03;                         // DLAB = 0                         

}

PROGRAM 3:

PROGRAM TO IMPLEMENT  MAIL_BOX

#include <rtl.h>

#include<stdio.h>

#include<lpc214x.h>

void init_serial(void);

os_mbx_declare (MsgBox, 100);              

U32 mpool[8*sizeof(U32) ];       

unsigned int cnt1,cnt2;

char arr1[20],arr2[20];

char arr3[20]="task2deleted";

int i=0;

__task void task2 (void);

__task void task1 (void)

 {

  U32 *mptr;

  os_tsk_create (task2, 0);

  os_mbx_init (MsgBox, sizeof(MsgBox));

  mptr = _alloc_box (mpool);               

while(1)

 {

           while(!(cnt1==15))

                             {

                             cnt1++;

                             sprintf(arr1,"counter1 :%d",cnt1);

                             while (arr1[i] != '\0')

                             {        os_dly_wait(1);

                                       while (!(U0LSR & 0x20));

                                       U0THR = arr1[i];

                                      i++;

                             }

                             i=0;

                             while (!(U0LSR & 0x20));

                             U0THR = '\n';

                              os_dly_wait(5);

                             }

 if (cnt1==15)

                   {

                   mptr[0] = cnt1;

                   cnt1=0;

                   os_mbx_send (MsgBox, mptr, 0xffff); /* Send the count value to a 'Mailbox' */

                   os_dly_wait(5);

    

                    }

           }

   }

__task void task2 (void)

{

  U32 *rptr  ;

  cnt2=0;

           while(1)

           {

           os_mbx_wait (MsgBox, (void**)&rptr, 0xffff);     

         cnt2 = *rptr;    

          while(!(cnt2==30))

          {       

                             cnt2++;

                   sprintf(arr2,"counter2 :%d",cnt2);

                   os_dly_wait(2);

                             while (arr2[i] != '\0')

                             {

                             while (!(U0LSR & 0x20));

                             U0THR = arr2[i];

                             i++;

                             }

                             i=0;

                             while (!(U0LSR & 0x20));

                             U0THR = '\n';

                             os_dly_wait(5);

                      }

                    cnt2=0;

           }

           }

int main (void)

{

 init_serial();

  _init_box (mpool, sizeof(mpool), sizeof(U32));

  os_sys_init(task1);

}

void init_serial (void)

{

  PINSEL0 = 0X0000005;                 // Enable RxD0 and TxD0             

  U0LCR = 0x83;                               // 8 bits, no Parity, 1 Stop bit    

  U0DLL = 0x61;                              // 9600 Baud Rate @ 15MHz VPB Clock 

  U0LCR = 0x03;                             // DLAB = 0                         

}