ex1.c

ucos2.8 移植到linux下的代码

/*
 *                                                uC/OS-II
 *                                          The Real-Time Kernel
 *
 *                                               Linux Port
 *
 * File        : $Source: /proj/cvs-gfa/Micrium/Software/linux-test/ex1.c,v $
 * By          : (c) George Fankhauser, Sensaco Consulting GmbH, 
 *               Switzerland, http://www.sensaco.com  
 * Version     : $Revision: 1.1.1.1 $
 *
 * Changed by  : $Author: gfa $
 *               $Date: 2003/11/20 10:19:14 $
 *
 * $Log: ex1.c,v $
 * Revision 1.1.1.1  2003/11/20 10:19:14  gfa
 * check in ucos II for linux
 *
 */

/** \file
 * This is the basic test program based on example #1 from the book MicroC/OS-II by J.J. Labrosse. 
 *
 * 
 */

#include "includes.h"

#include <stdio.h>


/** the ugly output stuff */
#include "term_display.h"

#define TASK_STK_SIZE    OS_TASK_DEF_STK_SIZE            /* Size of each task's stacks (# of bytes)          */
#define N_TASKS          7                               /* Number of identical tasks                        */


OS_STK          TaskStk[N_TASKS][TASK_STK_SIZE];	/* Stacks for subtasks */
OS_STK          TaskStartStk[TASK_STK_SIZE];		/* Stack for first task */
char            TaskData[N_TASKS];                      /* Parameters to pass to each task                  */

void  subTask(void *data);                              /* Function prototypes of tasks                     */
void  myTask(void *data);                               /* Function prototypes of Startup task              */
void  PutChar(char c);                                  /* Write a character to the UART                */
void  PutString(const char *s);                         /* Write a null-terminated string to the UART   */
void  SPrintDec(char *, INT16U, INT8U);                 /* Output an INT16U to a string (right adjust)      */
void  PutDec (INT8U x);                                 /* Display an INT8U without leading zeros           */
void  PC_Attribute (INT8U fgcolor, INT8U bgcolor);    /* Set attributes on PC_ terminal                 */
void  PC_DispClrScr(void);                            /* Clear PC_ terminal                             */
void  PC_DispChar(INT8U, INT8U, char, INT8U, INT8U);  /* Display a character on PC_ terminal            */
void  PC_DispStr(INT8U, INT8U, char *, INT8U, INT8U); /* Display a string on PC_ terminal               */
INT8U random(INT8U n);                                  /* Simple random generator (found in K&R)           */


int main (void)
{ 
  OSInit();
  RandomSem  = OSSemCreate(1);                        /* Random number semaphore                          */
  DispStrSem = OSSemCreate(1);                        /* Display string semaphore                         */

  OSTaskCreate(myTask, (void *)0, (void *)&TaskStartStk[TASK_STK_SIZE - 1], 0);

  RndNext = 1;                                        /* set random generator seed to 1                   */
  OSStart();                                          /* Start multitasking                               */
  return 0;
}

/** myTask
 * this is the highest priority task in this example
 *
 * Example taken from the Book
 */

void myTask(void *data)
{
  INT8U   i;
  char    s[10];
  static int x = 0;

  data = data;       

  linuxInitInt();                                     /* Initialize the Linux timer */

  PC_DispClrScr();       
  PC_DispStr(26,  1, "uC/OS-II, The Real-Time Kernel", COLOR_WHITE, COLOR_RED);
  PC_DispStr(33,  2, "Jean J. Labrosse", COLOR_WHITE, COLOR_BLACK);
  PC_DispStr(25,  3, "Linux port by George Fankhauser", COLOR_WHITE, COLOR_BLACK);
  PC_DispStr(18,  4, "Sensaco Consulting GmbH, http://www.sensaco.com", COLOR_WHITE,COLOR_BLACK);
  PC_DispStr(1,  23, "Determining  CPU's capacity ...", COLOR_WHITE, COLOR_BLACK);

  OSStatInit();                                       /* Initialize uC/OS-II's statistics                 */
    
  for (i = 0; i < N_TASKS; i++) {                     /* Create N_TASKS identical tasks                   */
    TaskData[i] = '0' + i;                            /* Each task will display its own letter            */
    OSTaskCreate(subTask, (void *)&TaskData[i], (void *)&TaskStk[i][TASK_STK_SIZE - 1], i + 1 /* prio */);
  }

  PC_DispStr(1, 23, "#Tasks          : xxxxx  CPU Usage: xxx %", COLOR_WHITE, COLOR_BLACK);
  PC_DispStr(1, 24, "#Task switch/sec: xxxxx   Task Sw.: xxxxx", COLOR_WHITE, COLOR_BLACK);
  for (;;) {
    SPrintDec(s, (INT16U)OSTaskCtr, 5);               /* Display #tasks running */
    PC_DispStr(19, 23, s, COLOR_WHITE, COLOR_BLUE);
    SPrintDec(s, (INT16U)OSCPUUsage, 3);              /* Display CPU usage in % */

    PC_DispStr(37, 23, s, COLOR_WHITE, COLOR_BLUE);

    x += OSCtxSwCtr;
    SPrintDec(s, (INT16U)x, 6);              /* # switches */
    PC_DispStr(37, 24, s, COLOR_WHITE, COLOR_BLUE);
     
#define UPDATE_F 4
    SPrintDec(s, (INT16U)OSCtxSwCtr * UPDATE_F, 5);              /* Display #context switches per second */
    PC_DispStr(19, 24, s, COLOR_WHITE, COLOR_BLUE);
    OSCtxSwCtr = 0;
    OSTimeDlyHMSM(0, 0, 0, 1000/UPDATE_F);                        /* Wait 1/UPDATES second */
  }
}

/** 
 */
void subTask (void *data)
{
  INT8U x;
  INT8U y;
  INT8U err;

  for (;;) {
    OSSemPend(RandomSem, 0, &err);                  /* Acquire semaphore to perform random numbers      */
    x = random(80);                                 /* Find X position where task number will appear    */
    y = random(15);                                 /* Find Y position where task number will appear    */
    OSSemPost(RandomSem);                           /* Release semaphore                                */
                                                    /* Display the task number on the screen            */
    PC_DispChar(x + 1, y + 6, *(char *)data, COLOR_BLACK, 
		    		*(char *)data - '0' + 1);
    OSTimeDly(1);                                 /* Delay 1 clock tick, gibes lower prio threafds a chance to run */
  }
}




void OSTaskSwHook() {}
void OSTaskStatHook() {}