Diff: libs/LPC17xx/LPC17xxLib/src/lpc17xx_adc.c

Revision:

2:1df0b61d3b5a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libs/LPC17xx/LPC17xxLib/src/lpc17xx_adc.c	Fri Feb 28 18:52:52 2014 -0800
@@ -0,0 +1,350 @@
+#ifdef __LPC17XX__
+
+/**********************************************************************
+* $Id$		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.
+**********************************************************************/
+
+/* 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));
+
+	// 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 = *(const volatile 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 = *(const volatile 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 =  *(const volatile 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 ------------------------------ */
+
+#endif /* __LPC17XX__ */