Hi all,
I'm new in the DSP world and have a question for programming a timer in code composer.
I want to generate an interrupt every second and toggle the blue led on the development board. (If this works I can expand.)
The code I have is:
********************
void main( void )
{
/* Initialize BSL */
USBSTK5515_init( );
USBSTK5515_ULED_init( );
Timer0Init();
//Init_Intrupt();
printf("\n Timer initialization");
StartTimer0();
while(1); /* endless loop, wait for interrupt */
}
********************
Uint16 fTimer =0;
void Timer0Init(void)
{
/*Timer0 Initialization
timer interval 0.5sec (2Hz)
prescale = 1011 (devide by 4096)
98.304M/4096 = 24K
24K/12K = 2Hz (12K = 0x2EE0)*/
/* TIM0 EN | AutoReload disable | Prescale = 0(100/2 = 50MHz) ==> 20nsec */
*CPU_TIM0_CTRL = 0x802E; // autoReload(32814Hz)
//*CPU_TIM0_CTRL = 0x802C; // disable autoReload (32812Hz)
//*CPU_TIM0_PLWR = 0x5DC0; // (24khz)
*CPU_TIM0_PLWR = 0x2EE0; // (12khz)
*CPU_TIM0_PHWR = 0x0000;
*CPU_TIM0_CLWR = 0x0000;
*CPU_TIM0_CHWR = 0x0000;
/* Clearing timer Aggregation register*/
*CPU_TIMINT_AGGR = 0x0007;
/* enable timer0 int flag*/
*CPU_TIM0_IER = 0x0001;
}
void StartTimer0(void)
{
/* Start the Timer 0*/
*CPU_TIM0_CTRL = *CPU_TIM0_CTRL | 0x0001;
}
interrupt void Timer_isr(void)
{
// clear timer int flag
IFR0 = IFR0&0x0010; // bitwise AND
/* clear timer0 int flag*/
*CPU_TIM0_IER = 0x0001;
/* Clear Timer0 bit in Timer Aggregate register*/
*CPU_TIMINT_AGGR = *CPU_TIMINT_AGGR | 0x0001 ;
USBSTK5515_ULED_toggle( 3 ); // Toggle DS2
fTimer=1;
//StartTimer0();
}
********************
The problem is that I never enter "interrupt void Timer_isr(void)". I have been searching on the net but can't find a solution.
Thanks in advance,
Tim
