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/***********************************************************************//**
* @file lpc17xx_adc.c
* @brief Contains all functions support for ADC firmware library on LPC17xx
* @version 3.0
* @date 18. June. 2010
* @author NXP MCU SW Application Team
**************************************************************************
* Software that is described herein is for illustrative purposes only
* which provides customers with programming information regarding the
* products. This software is supplied "AS IS" without any warranties.
* NXP Semiconductors assumes no responsibility or liability for the
* use of the software, conveys no license or title under any patent,
* copyright, or mask work right to the product. NXP Semiconductors
* reserves the right to make changes in the software without
* notification. NXP Semiconductors also make no representation or
* warranty that such application will be suitable for the specified
* use without further testing or modification.
**********************************************************************/
/* Peripheral group ----------------------------------------------------------- */
/** @addtogroup ADC
* @{
*/
/* Includes ------------------------------------------------------------------- */
#include "lpc17xx_adc.h"
#include "lpc17xx_clkpwr.h"
/* If this source file built with example, the LPC17xx FW library configuration
* file in each example directory ("lpc17xx_libcfg.h") must be included,
* otherwise the default FW library configuration file must be included instead
*/
#ifdef __BUILD_WITH_EXAMPLE__
#include "lpc17xx_libcfg.h"
#else
#include "lpc17xx_libcfg_default.h"
#endif /* __BUILD_WITH_EXAMPLE__ */
#ifdef _ADC
/* Public Functions ----------------------------------------------------------- */
/** @addtogroup ADC_Public_Functions
* @{
*/
/*********************************************************************//**
* @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;
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
temp = 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 = (temp /(rate * 65)) - 1;
tmp |= ADC_CR_CLKDIV(temp);
ADCx->ADCR = tmp;
}
/*********************************************************************//**
* @brief Close ADC
* @param[in] ADCx pointer to LPC_ADC_TypeDef, should be: LPC_ADC
* @return None
**********************************************************************/
void ADC_DeInit(LPC_ADC_TypeDef *ADCx)
{
CHECK_PARAM(PARAM_ADCx(ADCx));
// Clear PDN bit
ADCx->ADCR &= ~ADC_CR_PDN;
// Turn on power and clock
CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCAD, DISABLE);
}
/*********************************************************************//**
* @brief Get Result conversion from A/D data register
* @param[in] channel number which want to read back the result
* @return Result of conversion
*********************************************************************/
uint32_t ADC_GetData(uint32_t channel)
{
uint32_t adc_value;
CHECK_PARAM(PARAM_ADC_CHANNEL_SELECTION(channel));
adc_value = *(uint32_t *)((&LPC_ADC->ADDR0) + channel);
return ADC_GDR_RESULT(adc_value);
}
/*********************************************************************//**
* @brief Set start mode for ADC
* @param[in] ADCx pointer to LPC_ADC_TypeDef, should be: LPC_ADC
* @param[in] start_mode Start mode choose one of modes in
* 'ADC_START_OPT' enumeration type definition, should be:
* - ADC_START_CONTINUOUS
* - ADC_START_NOW
* - ADC_START_ON_EINT0
* - ADC_START_ON_CAP01
* - ADC_START_ON_MAT01
* - ADC_START_ON_MAT03
* - ADC_START_ON_MAT10
* - ADC_START_ON_MAT11
* @return None
*********************************************************************/
void ADC_StartCmd(LPC_ADC_TypeDef *ADCx, uint8_t start_mode)
{
CHECK_PARAM(PARAM_ADCx(ADCx));
CHECK_PARAM(PARAM_ADC_START_OPT(start_mode));
ADCx->ADCR &= ~ADC_CR_START_MASK;
ADCx->ADCR |=ADC_CR_START_MODE_SEL((uint32_t)start_mode);
}
/*********************************************************************//**
* @brief ADC Burst mode setting
* @param[in] ADCx pointer to LPC_ADC_TypeDef, should be: LPC_ADC
* @param[in] NewState
* - 1: Set Burst mode
* - 0: reset Burst mode
* @return None
**********************************************************************/
void ADC_BurstCmd(LPC_ADC_TypeDef *ADCx, FunctionalState NewState)
{
CHECK_PARAM(PARAM_ADCx(ADCx));
ADCx->ADCR &= ~ADC_CR_BURST;
if (NewState){
ADCx->ADCR |= ADC_CR_BURST;
}
}
/*********************************************************************//**
* @brief Set AD conversion in power mode
* @param[in] ADCx pointer to LPC_ADC_TypeDef, should be: LPC_ADC
* @param[in] NewState
* - 1: AD converter is optional
* - 0: AD Converter is in power down mode
* @return None
**********************************************************************/
void ADC_PowerdownCmd(LPC_ADC_TypeDef *ADCx, FunctionalState NewState)
{
CHECK_PARAM(PARAM_ADCx(ADCx));
ADCx->ADCR &= ~ADC_CR_PDN;
if (NewState){
ADCx->ADCR |= ADC_CR_PDN;
}
}
/*********************************************************************//**
* @brief Set Edge start configuration
* @param[in] ADCx pointer to LPC_ADC_TypeDef, should be: LPC_ADC
* @param[in] EdgeOption is ADC_START_ON_RISING and ADC_START_ON_FALLING
* 0:ADC_START_ON_RISING
* 1:ADC_START_ON_FALLING
* @return None
**********************************************************************/
void ADC_EdgeStartConfig(LPC_ADC_TypeDef *ADCx, uint8_t EdgeOption)
{
CHECK_PARAM(PARAM_ADCx(ADCx));
CHECK_PARAM(PARAM_ADC_START_ON_EDGE_OPT(EdgeOption));
ADCx->ADCR &= ~ADC_CR_EDGE;
if (EdgeOption){
ADCx->ADCR |= ADC_CR_EDGE;
}
}
/*********************************************************************//**
* @brief ADC interrupt configuration
* @param[in] ADCx pointer to LPC_ADC_TypeDef, should be: LPC_ADC
* @param[in] IntType: type of interrupt, should be:
* - ADC_ADINTEN0: Interrupt channel 0
* - ADC_ADINTEN1: Interrupt channel 1
* ...
* - ADC_ADINTEN7: Interrupt channel 7
* - ADC_ADGINTEN: Individual channel/global flag done generate an interrupt
* @param[in] NewState:
* - SET : enable ADC interrupt
* - RESET: disable ADC interrupt
* @return None
**********************************************************************/
void ADC_IntConfig (LPC_ADC_TypeDef *ADCx, ADC_TYPE_INT_OPT IntType, FunctionalState NewState)
{
CHECK_PARAM(PARAM_ADCx(ADCx));
CHECK_PARAM(PARAM_ADC_TYPE_INT_OPT(IntType));
ADCx->ADINTEN &= ~ADC_INTEN_CH(IntType);
if (NewState){
ADCx->ADINTEN |= ADC_INTEN_CH(IntType);
}
}
/*********************************************************************//**
* @brief Enable/Disable ADC channel number
* @param[in] ADCx pointer to LPC_ADC_TypeDef, should be: LPC_ADC
* @param[in] Channel channel number
* @param[in] NewState Enable or Disable
*
* @return None
**********************************************************************/
void ADC_ChannelCmd (LPC_ADC_TypeDef *ADCx, uint8_t Channel, FunctionalState NewState)
{
CHECK_PARAM(PARAM_ADCx(ADCx));
CHECK_PARAM(PARAM_ADC_CHANNEL_SELECTION(Channel));
if (NewState == ENABLE) {
ADCx->ADCR |= ADC_CR_CH_SEL(Channel);
} else {
ADCx->ADCR &= ~ADC_CR_CH_SEL(Channel);
}
}
/*********************************************************************//**
* @brief Get ADC result
* @param[in] ADCx pointer to LPC_ADC_TypeDef, should be: LPC_ADC
* @param[in] channel: channel number, should be 0...7
* @return Data conversion
**********************************************************************/
uint16_t ADC_ChannelGetData(LPC_ADC_TypeDef *ADCx, uint8_t channel)
{
uint32_t adc_value;
CHECK_PARAM(PARAM_ADCx(ADCx));
CHECK_PARAM(PARAM_ADC_CHANNEL_SELECTION(channel));
adc_value = *(uint32_t *) ((&ADCx->ADDR0) + channel);
return ADC_DR_RESULT(adc_value);
}
/*********************************************************************//**
* @brief Get ADC Chanel status from ADC data register
* @param[in] ADCx pointer to LPC_ADC_TypeDef, should be: LPC_ADC
* @param[in] channel: channel number, should be 0..7
* @param[in] StatusType
* 0:Burst status
* 1:Done status
* @return SET / RESET
**********************************************************************/
FlagStatus ADC_ChannelGetStatus(LPC_ADC_TypeDef *ADCx, uint8_t channel, uint32_t StatusType)
{
uint32_t temp;
CHECK_PARAM(PARAM_ADCx(ADCx));
CHECK_PARAM(PARAM_ADC_CHANNEL_SELECTION(channel));
CHECK_PARAM(PARAM_ADC_DATA_STATUS(StatusType));
temp = *(uint32_t *) ((&ADCx->ADDR0) + channel);
if (StatusType) {
temp &= ADC_DR_DONE_FLAG;
}else{
temp &= ADC_DR_OVERRUN_FLAG;
}
if (temp) {
return SET;
} else {
return RESET;
}
}
/*********************************************************************//**
* @brief Get ADC Data from AD Global register
* @param[in] ADCx pointer to LPC_ADC_TypeDef, should be: LPC_ADC
* @return Result of conversion
**********************************************************************/
uint32_t ADC_GlobalGetData(LPC_ADC_TypeDef *ADCx)
{
CHECK_PARAM(PARAM_ADCx(ADCx));
return ((uint32_t)(ADCx->ADGDR));
}
/*********************************************************************//**
* @brief Get ADC Chanel status from AD global data register
* @param[in] ADCx pointer to LPC_ADC_TypeDef, should be: LPC_ADC
* @param[in] StatusType
* 0:Burst status
* 1:Done status
* @return SET / RESET
**********************************************************************/
FlagStatus ADC_GlobalGetStatus(LPC_ADC_TypeDef *ADCx, uint32_t StatusType)
{
uint32_t temp;
CHECK_PARAM(PARAM_ADCx(ADCx));
CHECK_PARAM(PARAM_ADC_DATA_STATUS(StatusType));
temp = ADCx->ADGDR;
if (StatusType){
temp &= ADC_DR_DONE_FLAG;
}else{
temp &= ADC_DR_OVERRUN_FLAG;
}
if (temp){
return SET;
}else{
return RESET;
}
}
/**
* @}
*/
#endif /* _ADC */
/**
* @}
*/
/* --------------------------------- End Of File ------------------------------ */
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