/* Initialize the ADC peripheral and the ADC setup structure to default value */
void Chip_ADC_Init(LPC_ADC_T *pADC, ADC_CLOCK_SETUP_T *ADCSetup)
{
uint8_t div;
uint32_t cr = 0;
uint32_t clk;
Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_ADC);
#if defined(ADC_TRIM_SUPPORT)
pADC->ADTRM = 0xF00;
#endif
pADC->INTEN = 0; /* Disable all interrupts */
cr |= ADC_CR_PDN;
ADCSetup->adcRate = ADC_MAX_SAMPLE_RATE;
ADCSetup->bitsAccuracy = 0; /* LPC17xx/40xx doesn't support this setting */
clk = 0;
ADCSetup->burstMode = false;
div = getClkDiv(pADC, false, ADCSetup->adcRate, clk);
cr |= ADC_CR_CLKDIV(div);
#if !defined(ADC_ACC_12BITS)
cr |= ADC_CR_BITACC(ADCSetup->bitsAccuracy);
#endif /*defined(ADC_ACC_12BITS)*/
pADC->CR = cr;
}
/*********************************************************************//**
* @brief Initial for ADC
* + Set bit PCADC
* + Set clock for ADC
* + Set Clock Frequency
* @param[in] ADCx pointer to LPC_ADC_TypeDef, should be: LPC_ADC
* @param[in] rate ADC conversion rate, should be <=200KHz
* @return None
**********************************************************************/
void ADC_Init(LPC_ADC_TypeDef *ADCx, uint32_t rate)
{
uint32_t ADCPClk, temp, tmp;
CHECK_PARAM(PARAM_ADCx(ADCx));
CHECK_PARAM(PARAM_ADC_RATE(rate));
// Turn on power and clock
CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCAD, ENABLE);
ADCx->ADCR = 0;
//Enable PDN bit
tmp = ADC_CR_PDN;
// Set clock frequency
ADCPClk = CLKPWR_GetPCLK(CLKPWR_PCLKSEL_ADC);
/* The APB clock (PCLK_ADC0) is divided by (CLKDIV+1) to produce the clock for
* A/D converter, which should be less than or equal to 13MHz.
* A fully conversion requires 65 of these clocks.
* ADC clock = PCLK_ADC0 / (CLKDIV + 1);
* ADC rate = ADC clock / 65;
*/
temp = rate * 65;
temp = (ADCPClk * 2 + temp)/(2 * temp) - 1; //get the round value by fomular: (2*A + B)/(2*B)
tmp |= ADC_CR_CLKDIV(temp);
ADCx->ADCR = tmp;
}
/*********************************************************************//**
* @brief Initial for ADC
* + Set bit PCADC
* + Set clock for ADC
* + Set Clock Frequency
* @param[in] ADCx pointer to LPC_ADCn_Type, should be: LPC_ADC
* @param[in] rate ADC conversion rate, should be <=200KHz
* @param[in] bits_accuracy number of bits accuracy, should be <=10 bits and >=3bits
* @return None
**********************************************************************/
void ADC_Init(LPC_ADCn_Type *ADCx, uint32_t rate, uint8_t bits_accuracy)
{
uint32_t temp, tmpreg, ADCbitrate;
CHECK_PARAM(PARAM_ADCx(ADCx));
CHECK_PARAM(PARAM_ADC_RATE(rate));
// Turn on power and clock
//CGU_ConfigPPWR (CGU_PCONP_PCAD, ENABLE);
ADCx->CR = 0;
//Enable PDN bit
tmpreg = ADC_CR_PDN;
// Set clock frequency
if(ADCx == LPC_ADC0)
temp = CGU_GetPCLKFrequency(CGU_PERIPHERAL_ADC0);
else if(ADCx == LPC_ADC1)
temp = CGU_GetPCLKFrequency(CGU_PERIPHERAL_ADC1);
/* The APB clock (PCLK_ADC0) is divided by (CLKDIV+1) to produce the clock for
* A/D converter, which should be less than or equal to 13MHz.
* A fully conversion requires (bits_accuracy+1) of these clocks.
* ADC clock = PCLK_ADC0 / (CLKDIV + 1);
* ADC rate = ADC clock / (bits_accuracy+1);
*/
ADCbitrate = (rate * (bits_accuracy+1));
temp = ((temp*2 + ADCbitrate) / (ADCbitrate*2)) - 1;//get the round value by fomular: (2*A + B)/(2*B)
tmpreg |= ADC_CR_CLKDIV(temp) | ADC_CR_BITACC(10 - bits_accuracy);
ADCx->CR = tmpreg;
}
/*********************************************************************//**
* @brief Initial for ADC
* + Set bit PCADC
* + Set clock for ADC
* + Set Clock Frequency
* @param[in] ADCx pointer to LPC_ADC_TypeDef, should be: LPC_ADC
* @param[in] rate ADC conversion rate, should be <=200KHz
* @return None
**********************************************************************/
void ADC_Init(LPC_ADC_TypeDef *ADCx, uint32_t rate)
{
uint32_t temp, tmp;
// Turn on power and clock
CLKPWR_ConfigPPWR(CLKPWR_PCONP_PCADC, ENABLE);
ADCx->CR = 0;
//Enable PDN bit
tmp = ADC_CR_PDN;
// Set clock frequency
temp = CLKPWR_GetCLK(CLKPWR_CLKTYPE_PER);
/* The APB clock (PCLK_ADC0) is divided by (CLKDIV+1) to produce the clock for
* A/D converter, which should be less than or equal to 12.4MHz.
* A fully conversion requires 31 of these clocks.
* ADC clock = PCLK_ADC0 / (CLKDIV + 1);
* ADC rate = ADC clock / 31;
*/
temp = (temp /(rate * 31)) - 1;
tmp |= ADC_CR_CLKDIV(temp);
ADCx->CR = tmp;
}
/*********************************************************************//**
* @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;
}
/* Initialize the ADC */
void IP_ADC_Init(IP_ADC_001_T *pADC, uint8_t div, uint8_t bitsAcc, uint32_t flag)
{
uint32_t cr;
#if defined(ADC_TRIM_SUPPORT)
pADC->ADTRM = 0xF00;
#endif
pADC->INTEN = 0; /* Disable all interrupts */
cr = pADC->CR & (~ADC_CONFIG_MASK);
#if defined(ADC_ACC_12BITS)
cr |= ADC_CR_CLKDIV(div) | flag;
#else
cr |= ADC_CR_CLKDIV(div) | ADC_CR_BITACC(bitsAcc) | flag;
#endif /*defined(ADC_ACC_12BITS)*/
pADC->CR = cr;
}
/* Set the ADC Sample rate */
void Chip_ADC_SetSampleRate(LPC_ADC_T *pADC, ADC_CLOCK_SETUP_T *ADCSetup, uint32_t rate)
{
uint8_t div;
uint32_t cr;
cr = pADC->CR & (~ADC_SAMPLE_RATE_CONFIG_MASK);
ADCSetup->adcRate = rate;
div = getClkDiv(pADC, ADCSetup->burstMode, rate, (11 - ADCSetup->bitsAccuracy));
cr |= ADC_CR_CLKDIV(div);
cr |= ADC_CR_BITACC(ADCSetup->bitsAccuracy);
pADC->CR = cr;
}
/* Initialize the ADC peripheral and the ADC setup structure to default value */
void Chip_ADC_Init(LPC_ADC_T *pADC, ADC_CLOCK_SETUP_T *ADCSetup)
{
uint8_t div;
uint32_t cr = 0;
uint32_t clk;
Chip_Clock_EnableOpts(Chip_ADC_GetClockIndex(pADC), true, true, 1);
pADC->INTEN = 0; /* Disable all interrupts */
cr |= ADC_CR_PDN;
ADCSetup->adcRate = ADC_MAX_SAMPLE_RATE;
ADCSetup->bitsAccuracy = ADC_10BITS;
clk = 11;
ADCSetup->burstMode = false;
div = getClkDiv(pADC, false, ADCSetup->adcRate, clk);
cr |= ADC_CR_CLKDIV(div);
cr |= ADC_CR_BITACC(ADCSetup->bitsAccuracy);
pADC->CR = cr;
}
/**
* @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;
}
/* Initialize the ADC peripheral and the ADC setup structure to default value */
void Chip_ADC_Init(LPC_ADC_T *pADC, ADC_CLOCK_SETUP_T *ADCSetup)
{
uint8_t div;
uint32_t cr = 0;
uint32_t clk;
Chip_SYSCTL_PowerUp(SYSCTL_POWERDOWN_ADC_PD);
Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_ADC);
pADC->INTEN = 0; /* Disable all interrupts */
cr |= ADC_CR_PDN;
ADCSetup->adcRate = ADC_MAX_SAMPLE_RATE;
ADCSetup->bitsAccuracy = ADC_10BITS;
clk = 11;
ADCSetup->burstMode = false;
div = getClkDiv(pADC, false, ADCSetup->adcRate, clk);
cr |= ADC_CR_CLKDIV(div);
cr |= ADC_CR_BITACC(ADCSetup->bitsAccuracy);
pADC->CR = cr;
}
