/**
* \brief Set maxinum frequency clock for giving pripheral ID.
*
* \param id Peripheral ID (ID_xxx).
* \param mck Master clock.
* \return Peripheral clock.
*/
extern uint32_t PMC_SetPeriMaxClock( uint32_t dwId, uint32_t mck)
{
uint32_t maxClock;
uint8_t i;
/* Disable peripher clock */
PMC->PMC_PCR = PMC_PCR_PID(dwId) | PMC_PCR_CMD;
maxClock = PMC_GetPeriMaxFreq(dwId);
for ( i = 0; i < 4; i++) {
if ( mck / (1 << i ) <= maxClock) break;
}
PMC->PMC_PCR = PMC_PCR_PID(dwId) | PMC_PCR_CMD | (i << PMC_PCR_DIV_Pos) | PMC_PCR_EN;
return maxClock;
}
/*****************************************************************************************************
* Function: ADC_EnablePeripheral_GLCK
*
* Description: Enables the PCM for the AFEC with specific sourse clock.
*
* Caveats: Non Reentrant
*****************************************************************************************************/
void ADC_EnablePeripheral_GLCK (void)
{
PMC->PMC_PCR = PMC_PCR_PID(ID_AFEC0) | PMC_PCR_GCLKCSS(0) | PMC_PCR_CMD | PMC_PCR_GCLKEN ;
}
