359 lines
12 KiB
C
359 lines
12 KiB
C
/**********************************************************************
|
|
* $Id$ lpc17xx_adc.c 2010-06-18
|
|
*//**
|
|
* @file lpc17xx_adc.c
|
|
* @brief Contains all functions support for ADC firmware library on LPC17xx
|
|
* @version 3.1
|
|
* @date 26. July. 2011
|
|
* @author NXP MCU SW Application Team
|
|
*
|
|
* Copyright(C) 2011, NXP Semiconductor
|
|
* All rights reserved.
|
|
*
|
|
***********************************************************************
|
|
* 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.
|
|
* Permission to use, copy, modify, and distribute this software and its
|
|
* documentation is hereby granted, under NXP Semiconductors'
|
|
* relevant copyright in the software, without fee, provided that it
|
|
* is used in conjunction with NXP Semiconductors microcontrollers. This
|
|
* copyright, permission, and disclaimer notice must appear in all copies of
|
|
* this code.
|
|
**********************************************************************/
|
|
|
|
/* 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 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 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));
|
|
if (ADCx->ADCR & ADC_CR_START_MASK) //need to stop START bits before DeInit
|
|
ADCx->ADCR &= ~ADC_CR_START_MASK;
|
|
// Clear SEL bits
|
|
ADCx->ADCR &= ~0xFF;
|
|
// 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 {
|
|
if (ADCx->ADCR & ADC_CR_START_MASK) //need to stop START bits before disable channel
|
|
ADCx->ADCR &= ~ADC_CR_START_MASK;
|
|
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 ------------------------------ */
|
|
|