PIC multitache

[invitebbbd1bc2]

Bonsoir tout le monde,
Afin de réaliser un programme en C à implémenter dans un PIC qui permet un multitâche à l'aide du noyau temps réel OSA, j'ai rencontré un problème au niveau de l'exécution des 2 tâches crées. En effet, la première tâche déclarée s’exécute correctement tandis que la deuxiéme ne fonctionne pas sachant que les deux tâches ont le même degré de priorité. Pour régler le probléme existe t-elle une directive qui doit être utilisée et qui permet de jongler entre les tâches ou quoi au juste?!
(NB: Simulation effectuée sous ISIS)
Merci d'avance pour votre aide
-----

[RISC]

Salut,

Quel PIC.... parmi les 900 références ??
Ton programme ?

a+

[invitebbbd1bc2]

Bonsoir,
Les PIC16F et PIC18F
et Voici le programme:



#include <osa.h>

//****************************** ****************************** ******************
//
// Constants
//
//****************************** ****************************** ******************

//------------------------------------------------------------------------------
#if defined(P18F252) || defined(P18F258) || defined(P18F242) || defined(P18F248)\
|| defined(P16F873) || defined(P16F876) || defined(P16F873A) || defined(P16F876A)
//------------------------------------------------------------------------------

#define PORTA_CONST 0x00
#define TRISA_CONST 0x01

#define PORTB_CONST 0x00
#define TRISB_CONST 0x01

#define PORTC_CONST 0x00
#define TRISC_CONST 0x00

#define pin_BUTTON PORTB.B0
#define PORTLEDS PORTC
#define PORTLED2 PORTD

#define NUMBER_OF_LEDS 8
#define TABLE_MASK 7

//------------------------------------------------------------------------------
#elif defined(P18F452) || defined(P18F458) || defined(P18F442) || defined(P18F448)\
|| defined(P16F877) || defined(P16F874) || defined(P16F877A) || defined(P16F874A)
//------------------------------------------------------------------------------

#define PORTA_CONST 0x00
#define TRISA_CONST 0x01

#define PORTB_CONST 0x00
#define TRISB_CONST 0x01

#define PORTC_CONST 0x00
#define TRISC_CONST 0x00

#define PORTD_CONST 0x00
#define TRISD_CONST 0x00

#define PORTE_CONST 0x00
#define TRISE_CONST 0x00

#define pin_BUTTON PORTB.B0
#define PORTLEDS PORTC
#define PORTLED2 PORTD

#define NUMBER_OF_LEDS 8
#define TABLE_MASK 7

//------------------------------------------------------------------------------
#endif
//------------------------------------------------------------------------------


//------------------------------------------------------------------------------
// Timers
//------------------------------------------------------------------------------

// Timer0 used as a counter for software PWM

#define T0CON_CONST 0x41 // prs = 4 (period = 256 * 4 * 0.2us = 200 us)
// 8-bit mode
// TImer2 used for system ticks

#define T2CON_CONST 0x25 // post = 8, period = 250*4*5* 0.2 us = 1 ms
#define PR2_CONST (250-1)
#define ms / 1 //

//****************************** ****************************** ******************
//
// LED's brightness table
//
//****************************** ****************************** ******************


//------------------------------------------------------------------------------
#if NUMBER_OF_LEDS == 4
//------------------------------------------------------------------------------
const char Brightness[] = {128, 64, 16, 1};
//------------------------------------------------------------------------------
#elif NUMBER_OF_LEDS == 8
//------------------------------------------------------------------------------
const char Brightness[] = {128,64,32,16,8,4,2,1};
//------------------------------------------------------------------------------
#else
//------------------------------------------------------------------------------
#error "Incorrect NUMBER_OF_LEDS constant value (should be 4 or 8)"
//------------------------------------------------------------------------------
#endif
//------------------------------------------------------------------------------

//****************************** ****************************** ******************
//
// Global variables
//
//****************************** ****************************** ******************


volatile char m_cPosition1;

volatile char m_cPosition2;


//****************************** ****************************** ******************
//
// Function prototypes
//
//****************************** ****************************** ******************

void Init (void);
void Task_cheni1 (void);
void Task_cheni2 (void);


/****************************** ****************************** ********************
* *
* Function: main *
* *
*------------------------------------------------------------------------------*
* *
****************************** ****************************** ********************/

// Tell to linker that these functions will be called indirrectly

#pragma funcall main Task_cheni1
#pragma funcall main Task_cheni2


void main (void)
{
Init(); // Init periphery

OS_Init(); // Init OS

OS_Task_Create(0, Task_cheni1); // Create tasks.
OS_Task_Create(0, Task_cheni2);

OS_EI(); // Enable interrupts

OS_Run(); // Running scheduler

}


/****************************** ****************************** ********************
* *
* Function: Init *
* *
*------------------------------------------------------------------------------*
*
* description: Makes periphery initialization:
* - I/O ports
*
****************************** ****************************** ********************/

void Init (void)
{

//------------------------------------------------------------------------------
// I/O ports configuration
//------------------------------------------------------------------------------

PORTA = PORTA_CONST;
PORTB = PORTB_CONST;

TRISA = TRISA_CONST;
TRISB = TRISB_CONST;

NOT_RBPU_bit = 0;
#if defined(PORTC_CONST)
PORTC = PORTC_CONST;
TRISC = TRISC_CONST;
#endif

#if defined(PORTD_CONST)
PORTD = PORTD_CONST;
TRISD = TRISD_CONST;
#endif

#if defined(PORTE_CONST)
PORTE = PORTE_CONST;
TRISE = TRISE_CONST;
#endif
}

/****************************** ****************************** ********************
*
* TASK: Task_cheni1
*
*------------------------------------------------------------------------------*
*
* description: Chenillard de Gauche à Droite
*
****************************** ****************************** ********************/

void Task_cheni1 (void)
{
for (;;)
{ m_cPosition1=0 ;
do
{
PORTLEDS=Brightness[m_cPosition1];
m_cPosition1 ++;
}while(m_cPosition1!=8) ;
}}


/****************************** ****************************** ********************
*
* TASK: Task_cheni2
*
*------------------------------------------------------------------------------*
*
* description: Chenillard
*
****************************** ****************************** ********************/

void Task_cheni2 (void)
{
for (;;)
{
m_cPosition2=0 ;
do
{

PORTLED2=Brightness[m_cPosition2];
m_cPosition2 ++;

}while(m_cPosition1!=8) ;}
}
//****************************** ****************************** ******************
// THE END
//****************************** ****************************** ******************