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Diff: libs/LPC17xx/LPC17xxLib/src/lpc17xx_adc.c
- Revision:
- 3:f151d08d335c
- Parent:
- 2:1df0b61d3b5a
--- a/libs/LPC17xx/LPC17xxLib/src/lpc17xx_adc.c Fri Feb 28 18:52:52 2014 -0800 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,350 +0,0 @@ -#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__ */