main.c

void vDataGeneratingTask(void *pvParameters);
[...]

xTaskCreate(vDataGeneratingTask, "DataGen", configMINIMAL_STACK_SIZE, NULL, 1, NULL );
[...]

void vDataGeneratingTask(void *pvParameters)
{
int data;

while(1)
{
// a simple idea of generating non-static int data (this is what I neeed), probably will user rand() in the future
data++;
vTaskDelay(3000);
}
}