From e4e7b661172477aaa682a9cccfbac89adb1d01f6 Mon Sep 17 00:00:00 2001 From: Pixel Date: Sun, 23 Jan 2011 12:15:41 -0800 Subject: Adding basic CMSIS source code; v1.3.0 from the NXP website currently. --- arch/arm/lpc17xx/Drivers/source/lpc17xx_adc.c | 340 ++++++++++++++++++++++++++ 1 file changed, 340 insertions(+) create mode 100644 arch/arm/lpc17xx/Drivers/source/lpc17xx_adc.c (limited to 'arch/arm/lpc17xx/Drivers/source/lpc17xx_adc.c') diff --git a/arch/arm/lpc17xx/Drivers/source/lpc17xx_adc.c b/arch/arm/lpc17xx/Drivers/source/lpc17xx_adc.c new file mode 100644 index 0000000..a49c2cf --- /dev/null +++ b/arch/arm/lpc17xx/Drivers/source/lpc17xx_adc.c @@ -0,0 +1,340 @@ +/***********************************************************************//** + * @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 ------------------------------ */ + -- cgit v1.2.3