Hello,

I am trying to measure the execution time of some code using a
CoreTimer block connected to a Cortex-M1 processor design in an Actel
Fusion part.

My problem is that  TMR_current_value() always returns 0.  I am trying
to run in TMR_ONE_SHOT_MODE but I have also tried continuous mode but
no change.  I have also double checked that the CoreTimer block is
attached to the APB bus and that the base address in hardware
corresponds to  CORETMR_BASE_ADDR in my C source.

Can anyone suggest a reason that  TMR_current_value() always returns
0?

Below I attache my C code.


int main( void )
{
	int i;
	uint32_t tmr_read_val, tmr_pre_val, tmr_diff;
	const uint32_t tmr_load_val = 0x12345678;

	uint32_t gpio_out = GPOUT_INIT_STATE;
	GPIO_init( &g_gpio,	COREGPIO_BASE_ADDR, GPOUT_INIT_STATE );
	TMR_init(&g_timer, CORETMR_BASE_ADDR,
TMR_ONE_SHOT_MODE,PRESCALER_DIV_2,tmr_load_val);
	TMR_start(&g_timer);

	i=0;
	while(1){
		i++;
		if ( (i % 0x1FFF) == 0 ){
			tmr_pre_val = tmr_read_val;
			tmr_read_val = TMR_current_value(&g_timer);
			tmr_diff = tmr_pre_val - tmr_read_val;
    	    GPIO_set_outputs( &g_gpio, gpio_out++ );
    	    TMR_reload(&g_timer,tmr_load_val);
		}
	}
}