Description
Source
Call Graph
Start Line: 296
void ConfigureTc(void)
{
unsigned int div;
unsigned int tcclks;
// Enable peripheral clock
AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_TC0;
// Configure TC for a 4Hz frequency and trigger on RC compare
TC_FindMckDivisor(4, BOARD_MCK, &div, &tcclks);
TC_Configure(AT91C_BASE_TC0, tcclks | AT91C_TC_CPCTRG);
AT91C_BASE_TC0->TC_RC = (BOARD_MCK / div) / 4; // timerFreq / desiredFreq
// Configure and enable interrupt on RC compare
AIC_ConfigureIT(AT91C_ID_TC0, AT91C_AIC_PRIOR_LOWEST, ISR_Tc0);
AT91C_BASE_TC0->TC_IER = AT91C_TC_CPCS;
AIC_EnableIT(AT91C_ID_TC0);
// Start the counter if LED is enabled.
if (pLedStates[1]) {
TC_Start(AT91C_BASE_TC0);
}
}