void TMR0_IRQHandler(void)
{
// printf takes long time and affect the freq. calculation, we only print out once a while
static int cnt = 0;
static uint32_t t0, t1;
if(cnt == 0)
{
t0 = TIMER_GetCaptureData(TIMER0);
cnt++;
}
else if(cnt == 1)
{
t1 = TIMER_GetCaptureData(TIMER0);
cnt++;
if(t0 > t1)
{
// over run, do nothing
}
else
{
printf("Input frequency is %dHz\n", 22118400 / (t1 - t0)); // timer clock source is 22MHz
}
}
else
{
cnt = 0;
}
TIMER_ClearCaptureIntFlag(TIMER0);
}
/**
* @brief Timer-1 IRQ
*
* @param None
*
* @return None
*
* @details The TIMER1 default IRQ, declared in startup_Mini51.s.
*/
void TMR1_IRQHandler(void)
{
#if 1
TIMER_ClearIntFlag(TIMER1);
#else
if (TIMER_GetIntFlag(TIMER1) == 1)
{
/* Clear TIMER1 Timeout Interrupt Flag */
TIMER_ClearIntFlag(TIMER1);
}else
if (TIMER_GetCaptureIntFlag(TIMER1) == 1)
{
/* Clear TIMER1 Capture Interrupt Flag */
TIMER_ClearCaptureIntFlag(TIMER1);
}
#endif
g_au32TMRINTCount++;
if( brightlight_level[g_level_change] >=g_au32TMRINTCount )
{
/* dark lcd */
P54 =1;
} else {
/* bright lcd */
P54 = 0;
if(g_au32TMRINTCount>=100)
{
g_au32TMRINTCount=0;
}
}
}
void TMR1_IRQHandler(void)
{
// Timer clock is 1 MHz ( prescaler is set to 11 + 1), counter value records the duration for 1000 event counts.
printf("Event frequency is %d Hz\n", (1000000 * 1000) / TIMER_GetCounter(TIMER1));
TIMER_ClearCaptureIntFlag(TIMER1);
complete = 1;
}
/**
* @brief Timer2 IRQ
*
* @param None
*
* @return None
*
* @details The Timer2 default IRQ, declared in startup_NUC029xEE.s.
*/
void TMR2_IRQHandler(void)
{
if(TIMER_GetCaptureIntFlag(TIMER2) == 1) {
/* Clear Timer2 capture interrupt flag */
TIMER_ClearCaptureIntFlag(TIMER2);
g_au32TMRINTCount[2]++;
}
}
