Hello I'm a new mqx user, and i'm working with the MCF52259DEMO Board. I'm looking for some help, with the interruption of the PIT1.
I' need to do a virtual clock (just a simple counter with a variable), but this clock must to be very exact.
So my idea is to make constant interruption with the PIT1 module.
The problem is that I never obtain an interuption, so the code have some kind of problem.
I wrote this code (is very simple), so I'm going to post this:
//////this is just the main//////////
TASK_TEMPLATE_STRUCT MQX_template_list[] =
{
/* Task number, Entry point, Stack, Pri, String, Auto? */
{MAIN_TASK, Main_task, 5000, 4, "main", MQX_AUTO_START_TASK,0L,0},
{0, 0, 0, 0, 0,0,0L,0}
};
extern void dtim3_isr(void);
//////////////////////////////////////////////
// Clck counter //
//////////////////////////////////////////////
static unsigned long int clock;
static unsigned int Pit_counter;
//////////////////////////////////////////////////
// Global Register pointer //
//////////////////////////////////////////////////
VMCF5225_STRUCT_PTR reg_ptr;
/*****************************************************************/
/*****************************************************************/
/*ISR*-----------------------------------------------------------
*
* ISR Name : dtim3_isr
* Comments :
*END*-----------------------------------------------------------*/
__declspec(interrupt) void dtim3_isr(void)
{
//Set the PIT interrupt flag
reg_ptr->PIT[1].PCSR=reg_ptr->PIT[1].PCSR;
//
reg_ptr->PIT[1].PMR=Pit_counter;
/////////////////////////////////////////////////
//Actualizo el Contador
if(clock==1000)
{
clock=0;
reg_ptr->GPIO.PORTTC=reg_ptr->GPIO.PORTTC^0x01;
}
else
{
clock++;
reg_ptr->GPIO.PORTTA = reg_ptr->GPIO.PORTTA^0x01;
}
}
/*****************************************************************/
/*****************************************************************/
/*TASK*-----------------------------------------------------
*
* Task Name : Main_task
* Comments :
* This task prints " Hello World "
*
*END*-----------------------------------------------------*/
void Main_task(uint_32 initial_data)
{
//////////////////////////////////////////////////////////////
// Voy a Configurar el IOC0 y el DTIM0 (LED0) like output //
//////////////////////////////////////////////////////////////
//First IOC0
reg_ptr->GPIO.PTAPAR = 0x00;
reg_ptr->GPIO.DDRTA = 0x0F;
reg_ptr->GPIO.PORTTA = 0x00;
//Next Led
reg_ptr->GPIO.PTCPAR = 0x00;
reg_ptr->GPIO.DDRTC = 0x0F;
reg_ptr->GPIO.PORTTC = 0x00;
//////////////////////////////////////////////////////////////
//PIT1 Init
reg_ptr->PIT[1].PCSR=(reg_ptr->PIT[0].PCSR)
reg_ptr->PIT[1].PMR=reg_ptr->PIT[0].PMR;
Pit_counter=reg_ptr->PIT[0].PMR;
//Finally Install the PIT1
if (_int_install_isr(BSP_PIT1_INT_VECTOR,dtim3_isr, NULL) == NULL)
{
printf("\n PIT1 instalation fail \n");
} */
//Init global clock
clock=0;
while(1)
{
printf("\nTick count =%d\n", clock);
_time_delay_ticks(200);
}
}
Please could some body tell me what is the problem?
