Scheduling question for MQX

dongshengwang — Tue, 02 Dec 2014 22:35:01 GMT

I tested the following project in FRDM-k64F.

/* MQX task IDs */

#define KTEST1_TASK 1U

#define CANADA_TASK 2U

#define WORLD_TASK 3U

/* MQX task stack sizes */

#define KTEST1_TASK_STACK_SIZE 1024

const TASK_TEMPLATE_STRUCT MQX_template_list[] =

{

/* Task: Ktest1 */

{

/* Task number */ KTEST1_TASK,

/* Entry point */ (TASK_FPTR)Ktest1_task,

/* Stack size */ KTEST1_TASK_STACK_SIZE,

/* Task priority */ 8U,

/* Task name */ "ktest1",

/* Task attributes */ (MQX_AUTO_START_TASK),

/* Task parameter */ (uint32_t)(0),

/* Task time slice */ (uint32_t)(0)

/* Task: CANADA */

{

/* Task number */ CANADA_TASK,

/* Entry point */ (TASK_FPTR)Canada_task,

/* Stack size */ KTEST1_TASK_STACK_SIZE,

/* Task priority */ 8U,

/* Task name */ "Canada",

/* Task attributes */ (MQX_TIME_SLICE_TASK),

/* Task parameter */ (uint32_t)(0),

/* Task time slice */ (uint32_t)(100)

/* Task: WORLD */

{

/* Task number */ WORLD_TASK,

/* Entry point */ (TASK_FPTR)World_task,

/* Stack size */ KTEST1_TASK_STACK_SIZE,

/* Task priority */ 8U,

/* Task name */ "World",

/* Task attributes */ (MQX_TIME_SLICE_TASK),

/* Task parameter */ (uint32_t)(0),

/* Task time slice */ (uint32_t)(100)

TASK_TEMPLATE_LIST_END

};

void Ktest1_task(uint32_t task_init_data)

{

_task_id ktest1child;

ktest1child = _task_create(0, CANADA_TASK, 0);

if(ktest1child==MQX_NULL_TASK_ID)

{

printf("\nFailed to create task Canada\n");

}

else

printf("\nSuccess to create task Canada\n");

ktest1child = _task_create(0, WORLD_TASK, 0);

if(ktest1child==MQX_NULL_TASK_ID)

printf("\nfailed to create task World\n");

else

printf("\nsuccess to create task World\n");

_task_block();

}

void Canada_task(uint32_t task_init_data)

{

int counter = 0;

printf("\nHellow Canada\n");

while(1) {

counter++;

/* Write your code here ... */

}

void World_task(uint32_t task_init_data)

{

int counter = 0;

printf("\nHellow World\n");

while(1) {

counter++;

/* Write your code here ... */

}

When I run this project, the status of task ktest1 is blocked. the status of _mqx_init_task is terminating. the status of task Canada is always active, and the status of task World is always ready, even I set the Canada_task as MQX_TIME_SLICE_TASK. It still looks like FIFO Scheduling.

Re: Scheduling question for MQX

soledad — Wed, 03 Dec 2014 01:23:34 GMT

Hi,

Could you please double check you enable the time slice you need in the user_config.h?

#define MQX_HAS_TIME_SLICE 1

Which MQX version are you using? Are you using CW???

Have a great day,
Sol

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