// **********************************************************************
// **********************************************************************
// simulate asynchronous interrupts by polling events during idle loop
//
void pollInterrupts(void)
{
// check for task monopoly
pollClock = clock();
assert("Timeout" && ((pollClock - lastPollClock) < MAX_CYCLES));
lastPollClock = pollClock;
// check for keyboard interrupt
if ((inChar = GET_CHAR) > 0)
{
keyboard_isr();
}
// timer interrupt
timer_isr();
return;
} // end pollInterrupts
uint32_t us_ticker_read() {
if (!us_ticker_inited)
us_ticker_init();
uint32_t retval;
__disable_irq();
retval = (timer_ldval - PIT_TIMER.CVAL) / clk_mhz; //Hardware bits
retval |= msb_counter << __CLZ(clk_mhz); //Software bits
if (PIT_TIMER.TFLG == 1) { //If overflow bit is set, force it to be handled
timer_isr(); //Handle IRQ, read again to make sure software/hardware bits are synced
NVIC_ClearPendingIRQ(PIT_TIMER_IRQ);
return us_ticker_read();
}
__enable_irq();
return retval;
}
// **********************************************************************
// **********************************************************************
// simulate asynchronous interrupts by polling events during idle loop
//
static void pollInterrupts(void)
{
// check for task monopoly
pollClock = clock();
assert("Timeout" && ((pollClock - lastPollClock) < MAX_CYCLES));
lastPollClock = pollClock;
// check for keyboard interrupt
int inCharInt = 0;
if ((inCharInt = GET_CHAR) > 0)
{
if(inCharInt == 224){
arrowKey = TRUE;
inChar = GET_CHAR;
}
else
inChar = (char)inCharInt;
keyboard_isr();
}
// timer interrupt
timer_isr();
return;
} // end pollInterrupts
void low_priority_isr(void)
{
adc_isr();
timer_isr();
}
void interrupts(void) {
if (is_timer_isr()) timer_isr();
if (is_adc_isr()) adc_isr();
if (is_usart_isr()) usart_isr();
}
