lpc177x_8x_adc.c

ucosii和ucgui移植到LPC1788上

/***********************************************************************//**
 * @file		lpc177x_8x_adc.c
 * @brief		Contains all functions support for ADC firmware library on
 * 				LPC177x_8x
 * @version		1.0
 * @date		18. September. 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 "lpc177x_8x_adc.h"
#include "lpc177x_8x_clkpwr.h"


/* 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;

	// 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 		Close ADC
* @param[in]	ADCx pointer to LPC_ADC_TypeDef, should be: LPC_ADC
* @return 		None
**********************************************************************/
void ADC_DeInit(LPC_ADC_TypeDef *ADCx)
{
	// Clear PDN bit
	ADCx->CR &= ~ADC_CR_PDN;
	// Turn on power and clock
	CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCADC, 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;

	adc_value = *(uint32_t *)((&LPC_ADC->DR[0]) + 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)
{
	ADCx->CR &= ~ADC_CR_START_MASK;
	ADCx->CR |=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)
{
	ADCx->CR &= ~ADC_CR_BURST;
	if (NewState){
		ADCx->CR |= 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)
{
	ADCx->CR &= ~ADC_CR_PDN;
	if (NewState){
		ADCx->CR |= 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)
{
	ADCx->CR &= ~ADC_CR_EDGE;
	if (EdgeOption){
		ADCx->CR |= 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)
{
	ADCx->INTEN &= ~ADC_INTEN_CH(IntType);
	if (NewState){
		ADCx->INTEN |= 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)
{
	if (NewState == ENABLE) {
		ADCx->CR |= ADC_CR_CH_SEL(Channel);
	} else {
		ADCx->CR &= ~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;
	adc_value = *(uint32_t *) ((&ADCx->DR[0]) + channel);
//	return ADC_DR_RESULT(adc_value);
	return (((adc_value>>4)&0xFFF));
}

/*********************************************************************//**
* @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;
	temp =  *(uint32_t *) ((&ADCx->DR[0]) + 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)
{
	return ((uint32_t)(ADCx->GDR));
}

/*********************************************************************//**
* @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;

	temp =  ADCx->GDR;
	if (StatusType){
		temp &= ADC_DR_DONE_FLAG;
	}else{
		temp &= ADC_DR_OVERRUN_FLAG;
	}
	if (temp){
		return SET;
	}else{
		return RESET;
	}
}

/**
 * @}
 */

/**
 * @}
 */

/* --------------------------------- End Of File ------------------------------ */