/*********************************************************************//**
* @brief Initial for ADC
* - Set bit PCADC
* - Set clock for ADC
* - Set Clock Frequency
*
* @param[in] ConvFreq Clock frequency
* @return None
************************************************************************/
void ADC_Init(uint32_t ConvFreq)
{
uint32_t temp, tmp;
tmp = 0;
CHECK_PARAM(PARAM_ADC_FREQUENCY(ConvFreq));
// Turn on power
SYSCON_PowerCon(SYSCON_ABLOCK_ADC, ENABLE);
// Turn on clock
SYSCON_AHBPeriphClockCmd(SYSCON_AHBPeriph_ADC, ENABLE);
LPC_ADC->CR = 0;
// The A/D converter is in power-down mode
//SYSCON_DeepSleepPowerCon(SYSCON_ABLOCK_ADC, ENABLE);
// Set clock frequency
temp = SystemCoreClock / LPC_SYSCON->SYSAHBCLKDIV;
temp = (temp /ConvFreq) - 1;
tmp |= ADC_CR_CLKDIV(temp);
LPC_ADC->CR = tmp;
}
/**
* @brief Initial for ADC
* - Set bit PCADC
* - Set clock for ADC
* - Set Clock Frequency
*
* @param[in] ADCx pointer to ADC_TypeDef
* @param[in] ConvFreq Clock frequency
* @return None
*/
void ADC_Init(ADC_TypeDef *ADCx, uint32_t ConvFreq)
{
uint32_t temp, tmp;
CHECK_PARAM(PARAM_ADCx(ADCx));
CHECK_PARAM(PARAM_ADC_FREQUENCY(ConvFreq));
// Turn on power and clock
CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCAD, ENABLE);
// Set clock divider for ADC to 4 from CCLK as default
// CLKPWR_SetPCLKDiv(CLKPWR_PCLKSEL_ADC,CLKPWR_PCLKSEL_CCLK_DIV_4);
ADCx->ADCR = 0;
//Enable PDN bit
tmp = ADC_CR_PDN;
// Set clock frequency
temp = CLKPWR_GetPCLK(CLKPWR_PCLKSEL_ADC) ;
temp = (temp /ConvFreq) - 1;
tmp |= ADC_CR_CLKDIV(temp);
ADCx->ADCR = tmp;
}
