📄 ex123l.c.rtf
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EX1L.C
#include "includes.h"
#define TASK_STK_SIZE 512 /* Size of each task's stacks (# of WORDs) */
#define N_TASKS 10 /* Number of identical tasks */
OS_STK TaskStk[N_TASKS][TASK_STK_SIZE]; /* Tasks stacks */
OS_STK TaskStartStk[TASK_STK_SIZE];
char TaskData[N_TASKS]; /* Parameters to pass to each task */
OS_EVENT *RandomSem;
void Task(void *data); /* Function prototypes of tasks */
void TaskStart(void *data); /* Function prototypes of Startup task */
void main (void)
{
PC_DispClrScr(DISP_FGND_WHITE + DISP_BGND_BLACK); /* Clear the screen */
OSInit(); /* Initialize uC/OS-II */
PC_DOSSaveReturn(); /* Save environment to return to DOS */
PC_VectSet(uCOS, OSCtxSw); /* Install uC/OS-II's context switch vector */
RandomSem = OSSemCreate(1); /* Random number semaphore */
OSTaskCreate(TaskStart, (void *)0, (void *)&TaskStartStk[TASK_STK_SIZE - 1], 0);
OSStart(); /* Start multitasking */
}
void TaskStart (void *data)
{
UBYTE i;
char s[100];
WORD key;
data = data; /* Prevent compiler warning */
PC_DispStr(26, 0, "uC/OS-II, The Real-Time Kernel", DISP_FGND_WHITE + DISP_BGND_RED + DISP_BLINK);
PC_DispStr(33, 1, "Jean J. Labrosse", DISP_FGND_WHITE);
PC_DispStr(36, 3, "EXAMPLE #1", DISP_FGND_WHITE);
OS_ENTER_CRITICAL();
PC_VectSet(0x08, OSTickISR); /* Install uC/OS-II's clock tick ISR */
PC_SetTickRate(OS_TICKS_PER_SEC); /* Reprogram tick rate */
OS_EXIT_CRITICAL();
PC_DispStr(0, 22, "Determining CPU's capacity ...", DISP_FGND_WHITE);
OSStatInit(); /* Initialize uC/OS-II's statistics */
PC_DispClrLine(22, DISP_FGND_WHITE + DISP_BGND_BLACK);
for (i = 0; i < N_TASKS; i++) { /* Create N_TASKS identical tasks */
TaskData[i] = '0' + i; /* Each task will display its own letter */
OSTaskCreate(Task, (void *)&TaskData[i], (void *)&TaskStk[i][TASK_STK_SIZE - 1], i + 1);
}
PC_DispStr( 0, 22, "#Tasks : xxxxx CPU Usage: xxx %", DISP_FGND_WHITE);
PC_DispStr( 0, 23, "#Task switch/sec: xxxxx", DISP_FGND_WHITE);
PC_DispStr(28, 24, "<-PRESS 'ESC' TO QUIT->", DISP_FGND_WHITE + DISP_BLINK);
for (;;) {
sprintf(s, "%5d", OSTaskCtr); /* Display #tasks running */
PC_DispStr(18, 22, s, DISP_FGND_BLUE + DISP_BGND_CYAN);
sprintf(s, "%3d", OSCPUUsage); /* Display CPU usage in % */
PC_DispStr(36, 22, s, DISP_FGND_BLUE + DISP_BGND_CYAN);
sprintf(s, "%5d", OSCtxSwCtr); /* Display #context switches per second */
PC_DispStr(18, 23, s, DISP_FGND_BLUE + DISP_BGND_CYAN);
OSCtxSwCtr = 0;
sprintf(s, "V%3.2f", (float)OSVersion() * 0.01); /* Display version number as Vx.yy */
PC_DispStr(75, 24, s, DISP_FGND_YELLOW + DISP_BGND_BLUE);
PC_GetDateTime(s); /* Get and display date and time */
PC_DispStr(0, 24, s, DISP_FGND_BLUE + DISP_BGND_CYAN);
if (PC_GetKey(&key) == TRUE) { /* See if key has been pressed */
if (key == 0x1B) { /* Yes, see if it's the ESCAPE key */
PC_DOSReturn(); /* Return to DOS */
}
}
OSTimeDlyHMSM(0, 0, 1, 0); /* Wait one second */
}
}
void Task (void *data)
{
UBYTE x;
UBYTE y;
UBYTE 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(16); /* Find Y position where task number will appear */
OSSemPost(RandomSem); /* Release semaphore */
/* Display the task number on the screen */
PC_DispChar(x, y + 5, *(char *)data, DISP_FGND_LIGHT_GRAY);
OSTimeDly(1); /* Delay 1 clock tick */
}
}
EX2L.C
#include "includes.h"
#define TASK_STK_SIZE 512 /* Size of each task's stacks (# of WORDs) */
#define TASK_START_ID 0 /* Application tasks IDs */
#define TASK_CLK_ID 1
#define TASK_1_ID 2
#define TASK_2_ID 3
#define TASK_3_ID 4
#define TASK_4_ID 5
#define TASK_5_ID 6
#define TASK_START_PRIO 10 /* Application tasks priorities */
#define TASK_CLK_PRIO 11
#define TASK_1_PRIO 12
#define TASK_2_PRIO 13
#define TASK_3_PRIO 14
#define TASK_4_PRIO 15
#define TASK_5_PRIO 16
OS_STK TaskStartStk[TASK_STK_SIZE]; /* Startup task stack */
OS_STK TaskClkStk[TASK_STK_SIZE]; /* Clock task stack */
OS_STK Task1Stk[TASK_STK_SIZE]; /* Task #1 task stack */
OS_STK Task2Stk[TASK_STK_SIZE]; /* Task #2 task stack */
OS_STK Task3Stk[TASK_STK_SIZE]; /* Task #3 task stack */
OS_STK Task4Stk[TASK_STK_SIZE]; /* Task #4 task stack */
OS_STK Task5Stk[TASK_STK_SIZE]; /* Task #5 task stack */
OS_EVENT *AckMbox; /* Message mailboxes for Tasks #4 and #5 */
OS_EVENT *TxMbox;
void TaskStart(void *data); /* Function prototypes of tasks */
void TaskClk(void *data);
void Task1(void *data);
void Task2(void *data);
void Task3(void *data);
void Task4(void *data);
void Task5(void *data);
void main (void)
{
PC_DispClrScr(DISP_FGND_WHITE); /* Clear the screen */
OSInit(); /* Initialize uC/OS-II */
PC_DOSSaveReturn(); /* Save environment to return to DOS */
PC_VectSet(uCOS, OSCtxSw); /* Install uC/OS-II's context switch vector */
PC_ElapsedInit(); /* Initialized elapsed time measurement */
OSTaskCreateExt(TaskStart, (void *)0, &TaskStartStk[TASK_STK_SIZE-1], TASK_START_PRIO,
TASK_START_ID, &TaskStartStk[0], TASK_STK_SIZE, (void *)0,
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);
OSStart(); /* Start multitasking */
}
void TaskStart (void *data)
{
char s[80];
INT16S key;
data = data; /* Prevent compiler warning */
PC_DispStr(26, 0, "uC/OS-II, The Real-Time Kernel", DISP_FGND_WHITE + DISP_BGND_RED + DISP_BLINK);
PC_DispStr(33, 1, "Jean J. Labrosse", DISP_FGND_WHITE);
PC_DispStr(36, 3, "EXAMPLE #2", DISP_FGND_WHITE);
PC_DispStr( 0, 9, "Task Total Stack Free Stack Used Stack ExecTime (uS)", DISP_FGND_WHITE);
PC_DispStr( 0, 10, "------------- ----------- ---------- ---------- -------------", DISP_FGND_WHITE);
PC_DispStr( 0, 12, "TaskStart():", DISP_FGND_WHITE);
PC_DispStr( 0, 13, "TaskClk() :", DISP_FGND_WHITE);
PC_DispStr( 0, 14, "Task1() :", DISP_FGND_WHITE);
PC_DispStr( 0, 15, "Task2() :", DISP_FGND_WHITE);
PC_DispStr( 0, 16, "Task3() :", DISP_FGND_WHITE);
PC_DispStr( 0, 17, "Task4() :", DISP_FGND_WHITE);
PC_DispStr( 0, 18, "Task5() :", DISP_FGND_WHITE);
PC_DispStr(28, 24, "<-PRESS 'ESC' TO QUIT->", DISP_FGND_WHITE + DISP_BLINK);
OS_ENTER_CRITICAL(); /* Install uC/OS-II's clock tick ISR */
PC_VectSet(0x08, OSTickISR);
PC_SetTickRate(OS_TICKS_PER_SEC); /* Reprogram tick rate */
OS_EXIT_CRITICAL();
PC_DispStr(0, 22, "Determining CPU's capacity ...", DISP_FGND_WHITE);
OSStatInit(); /* Initialize uC/OS-II's statistics */
PC_DispClrLine(22, DISP_FGND_WHITE + DISP_BGND_BLACK);
AckMbox = OSMboxCreate((void *)0); /* Create 2 message mailboxes */
TxMbox = OSMboxCreate((void *)0);
OSTaskCreateExt(TaskClk, (void *)0, &TaskClkStk[TASK_STK_SIZE-1], TASK_CLK_PRIO,
TASK_CLK_ID, &TaskClkStk[0], TASK_STK_SIZE, (void *)0,
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);
OSTaskCreateExt(Task1, (void *)0, &Task1Stk[TASK_STK_SIZE-1], TASK_1_PRIO,
TASK_1_ID, &Task1Stk[0], TASK_STK_SIZE, (void *)0,
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);
OSTaskCreateExt(Task2, (void *)0, &Task2Stk[TASK_STK_SIZE-1], TASK_2_PRIO,
TASK_2_ID, &Task2Stk[0], TASK_STK_SIZE, (void *)0,
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);
OSTaskCreateExt(Task3, (void *)0, &Task3Stk[TASK_STK_SIZE-1], TASK_3_PRIO,
TASK_3_ID, &Task3Stk[0], TASK_STK_SIZE, (void *)0,
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);
OSTaskCreateExt(Task4, (void *)0, &Task4Stk[TASK_STK_SIZE-1], TASK_4_PRIO,
TASK_4_ID, &Task4Stk[0], TASK_STK_SIZE, (void *)0,
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);
OSTaskCreateExt(Task5, (void *)0, &Task5Stk[TASK_STK_SIZE-1], TASK_5_PRIO,
TASK_5_ID, &Task5Stk[0], TASK_STK_SIZE, (void *)0,
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);
PC_DispStr( 0, 22, "#Tasks : xxxxx CPU Usage: xxx %", DISP_FGND_WHITE);
PC_DispStr( 0, 23, "#Task switch/sec: xxxxx", DISP_FGND_WHITE);
for (;;) {
sprintf(s, "%5d", OSTaskCtr); /* Display #tasks running */
PC_DispStr(18, 22, s, DISP_FGND_BLUE + DISP_BGND_CYAN);
sprintf(s, "%3d", OSCPUUsage); /* Display CPU usage in % */
PC_DispStr(36, 22, s, DISP_FGND_BLUE + DISP_BGND_CYAN);
sprintf(s, "%5d", OSCtxSwCtr); /* Display #context switches per second */
PC_DispStr(18, 23, s, DISP_FGND_BLUE + DISP_BGND_CYAN);
OSCtxSwCtr = 0; /* Clear context switch counter */
sprintf(s, "V%3.2f", (float)OSVersion() * 0.01);
PC_DispStr(75, 24, s, DISP_FGND_YELLOW + DISP_BGND_BLUE);
if (PC_GetKey(&key)) { /* See if key has been pressed */
if (key == 0x1B) { /* Yes, see if it's the ESCAPE key */
PC_DOSReturn(); /* Yes, return to DOS */
}
}
OSTimeDly(OS_TICKS_PER_SEC); /* Wait one second */
}
}
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