Chapter I - Sample Code

1.2. Installing uCOS-II ¶

��톨하�� .. �� uCOS-II �� 하�� .. �� 해�� 파�� 하�� .

1.3. INCLUDES.H ¶

�� .c 파�� 클�� 헤��파��. �� 파�� 한��.

1.4. Compiler-Independent Data Types ¶

�� 포팅하�� CPU�� 해�� 한��. (�� 키�� 하�� )

�� int 형 �� 크�� char 형 �� 크��.. �� 해��.

~cpp 
   // 형 ���������
   typedef ungisned char BOOLEAN;
   typedef unsigned char INT8U
   typedef signed int INT16S
   ...
   // 형 ��������� (#define������)
   #define BYTE INT8S
   ...

1.5. Global Variables ¶

OS �� 하�� 한 �� . �� 하��? extern 키�� 하�� . 하�� uCOS-II �� extern 키�� #define 해�� 크�� 한��.

~cpp 
 #ifdef OS_GLOBALS
#define OS_EXT
#else
#define OS_EXT_extern
#endif

�� 크�� 해 �� 킨�� 해 ��

~cpp 
OS_EXT INT32U OSIdleCtr;
OS_EXT INT32U OSIdleCtrRun;
OS_EXT INT32U OSIdleCtrMax;

�� (��파��) �� .

~cpp 
extern INT32U OSIdleCtr;
extern INT32U OSIdleCtrRun;
extern INT32U OSIdleCtrMax;

�� OS_GLOBALS�� 크�� 키�� 형 �� 태�� (�� #ifdef~#else �� #else �� ) �� .

~cpp 
#define OS_GLOBALS
#include "inlcudes.h"

��

~cpp 
INT32U OSIdleCtr;
INT32U OSIdleCtrRun;
INT32U OSIdleCtrMax;

��, �� Local 하�� .

1.6. OS_ENTER_CRITICAL and OS_EXIT_CRITICAL ¶

OS�� 행�� 해 interrupt �� 하�� 해 크��티�� 하�� . �� 해 �� . uCOS-II�� 히 ��크��함�� 해 크��티�� 한��. ��크��함�� 하�� 히 ��트�� 효화, ��효화 ��키�� .

~cpp 
#define OS_CRITICAL_METHOD

#if OS_CRITICAL_METHOD == 1 // OS_CRITICAL_METHOD ��� ������������ ������ ������������������. ������ CPU��� ������ ��������� ������ ���해��� ���������������.
#define OS_ENTER_CRITICAL() asm CLI
#deifne OS_EXIT_CRITICAL() asm STI
#endif

#if OS_CRITICAL_METHOD == 2
#define OS_ENTER_CRITICAL() asm {PUSHF; CLI}  // PUSHF��� ��������� ��� ������������. ������ ���택��� ������ ��������������� ���������.
                                              // PUSHF��� CPU��������������� 하������ ��������� ���택��� ������ ��������� ���편하��� 하��� ���하��� 호��� 하��� ASM������������ ���해��� ��������� 
                                              // ���해 ������ ��������������� ��������� ���택��� PUSH하��� ���������. ��������� POPF��� PUSHF��� ������������ ���택������ ������ ������������ ���������                                            // ��������������� ������ ���킴. 항��� ��� ��� ��������� 한������ ������ ������ ��������� 한���.
#deifne OS_EXIT_CRITICAL() asm STI
#endif

1.7. PC-Based Services ¶

�� ..

1.7.1. Character-Based Display ¶

��플�� 한��. x, y�� 해�� 키�� 할 �� . 1�� 트�� 2��. 1��트�� , �� 1��트�� 포��/�� . (�� 4��트�� 하�� 4��트�� )

~cpp 
PC_DispClrScr()        // Clear the screen
PC_DispClrLine()     // Clear a single row (or line)
PC_DispChar()       // Display a single ASCII chracter anywhere on the screen
PC_DispStr()       // Display and ASCII strin anywhere on the screen

1.7.2. Elapsed Time Management ¶

��행�� 한 task �� 행�� 하�� 해�� 한��. (��한�� ?). �� PC�� 82C52 �� 2�� 통해 ��행��. ��행�� 한 함�� PC_ElapsedStart()�� PC_ElapsedStop()�� . 하�� 함�� 하�� PC_ElapsedInit()�� 호��해��한��. �� 함�� 함�� 헤�� 하�� . �� 하�� PC_ElapsedStop 함�� 해 ��행�� (��크��). �� 함�� 트(�� : �� 하�� task�� subroutine�� 하�� 해 ��함, from 한��) 하�� 한��. �� PC_DispChar()함�� 하�� .

~cpp 
INT16U time;

PC_ElapsedInit();
.
.
PC_ElapsedStart();
PC_DispChar(40, 24, 'A', DISP_FGND_WHITE);
time = PC_ElapsedStop();

1.7.3. Miscellaneous ¶

uCOS-II�� DOS Application �� 하��. �� uCOS-II�� main 함�� 한��. uCOS-II�� 티태�� task �� 택�� 할��하�� , uCOS-II�� 키�� DOS�� 태�� 하��, uCOS-II�� 태�� DOS��행�� 하�� 한��. �� 태�� 하�� 함�� PC_DosSaveReturn()�� DOS�� 태�� PC_DOSReturn() 함��. PC.C 파�� ANSI C 함�� setjmp()함�� longjmp()함�� 태�� 키��, ��. �� 함�� Borland C++ ��파�� 한 �� 파�� 한��.

uCOS-II�� PC_DOSSaveReturn 함�� 호��해��한��. �� DOS�� curruped mode �� windows�� 향�� .

Chapter I - Sample Code

Contents

1. Chapter 1 ¶

1.1. Sample Code ¶

1.2. Installing uCOS-II ¶

1.3. INCLUDES.H ¶

1.4. Compiler-Independent Data Types ¶

1.5. Global Variables ¶

1.6. OS_ENTER_CRITICAL and OS_EXIT_CRITICAL ¶

1.7. PC-Based Services ¶

1.7.1. Character-Based Display ¶

1.7.2. Elapsed Time Management ¶

1.7.3. Miscellaneous ¶

1.8. uCOS-II Examples ¶

1.9. Example 1 ¶

1.9.1. main() ¶

1.9.2. TaskStart() ¶

1.9.3. TaskN() ¶

1.10. Example 2 ¶

1.10.1. main() ¶

1.10.2. TaskStart() ¶

1.10.3. TaskN() ¶

1.11. Example 3 ¶

1.11.1. main() ¶

1.11.2. Tasks ¶

1.11.3. Notes ¶